DATANET In hydrologic terms, it is the hydrologic Data Network Analysis Software. CORONA - a disk of light surrounding the sun or moon; this is a result of the diffraction of light by small water droplets. NEGATIVE TILTED TROUGH- A trough which tilts from the northwest toward the southeast. Some sites are also equipped with other sensors such as temperature, wind, pressure, river stage or tide level. 2) Snow. It nearly always starts as a funnel cloud and may be accompanied by a loud roaring noise. WCM - Warning Coordination Meteorologist. Detailed View Toronto, ON. Also called a thunderstorm cloud, it is frequently accompanied by heavy showers, lightning, thunder, and sometimes hail or gusty winds. Strong Planetary Boundary Layer winds which advect warmer temperatures and moisture into the forecast area. DATACOL In hydrologic terms, the Software System that supports RFC gateway functions. These small, transparent ice pellets usually bounce when they hit a hard surface. Please Contact Us. Local Outlook Typically in the mid-latitude, troughs and ridges move west to east. Found inside – Page 11Below is an example of the new product : Last year , the local NWS Forecast Office in Juneau , AK , surveyed more than 1,100 residents to evaluate the format and terminology NWS uses to write public weather forecasts . POSITIVE ISOTHERMAL VORTICITY ADVECTION (PIVA)- Advection of higher values of vorticity by the thermal wind on a map of vorticity and thickness contours. AVHRR - Advanced Very High Resolution Radiometer. Indicates air will rises due to low level warm air advection and/or upper level divergence. POSITIVE TILTED TROUGH- A trough which tilts from the northeast toward the southwest. A complex of thunderstorms which becomes organized on a scale larger than the individual thunderstorms, and normally persists for several hours or more. River Observations (Map) Found insideGLOSSARY OF TERMS USED IN FOREST FIRE CONTROL . 24 pp . ( 23 ) UNITED STATES WEATHER BUREAU . 1948. FIRE WEATHER FORECAST TERMINOLOGY . & pp . [ Processed . ] ( 24 ) WILKINS , AUSTIN H. 1948. THE STORY OF THE MAXE FOREST FIRE DISASTER . Blowing snow - Wind-driven snow that causes reduced visibility and sometimes significant drifting. Text Products COASTAL FLOODING - Inundation of coastal areas from waves and storm surge. Also known as an anticyclone. The difference between weather and climate is that weather consists of the short-term (minutes to months) changes in the atmosphere. SMOG - Pollution formed by the interaction of pollutants and sunlight (photochemical smog), usually restricting visibility, and occasionally hazardous to health. Local Climate Data Records . River Forecasts (Map) Above median spring rainfall likely for eastern two-thirds of Australia but below median for western WA and western Tasmania; warmer days for the northern tropics and far southeast, but cooler days for parts of eastern and central Australia. Eastern Great Lakes. The forecaster will try to focus on the most particular challenges of the forecast. Found inside – Page 426Lead-Time: The time between the earliest moment at which the forecast could be released and the starting-time for ... Medium-Range Weather Forecasting: Official terminology of the WMO to indicate predictions from 72 hours (3 days) to ... Multiple locations were found. Find the most current, accurate and reliable weather forecasts and conditions with The Weather Network. TURBULENCE- Disrupted flow in the atmosphere that produces gusts and eddies. ISOTHERM - the line of equal temperature denoted on surface weather maps. Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 58 °F. Negative LI values are unstable. RAIN - Precipitation of liquid water particles which, in contrast to drizzle, are widely separated and larger in size. Activity Planner JET STREAK- A relative maximum of windflow within the jet stream. Please try another search. HEAVY SNOW - In the Inland Northwest, mountains above 3000 feet - 8 to 12 inches in 12 hours or 12-18 inches or more in 24 hours. TROPICAL DEPRESSION - Tropical mass of thunderstorms with a cyclonic wind circulation and winds between 20 and 34 knots. Central Rockies. TWEAK- To change slightly. INFLOW- Wind speed, in knots, of the average PBL windspeed. AK 511 This three-volume A-to-Z compendium consists of over 300 entries written by a team of leading international scholars and researchers working in the field. This phenomena often occurs along the California coast during the summer. BROKEN CLOUDS - Clouds which cover between 6/10 and 9/10 of the sky. NOAA WEATHER WIRE (NWWS) - Mass dissemination via satellite of National Weather Service products to the media and public. A high pressure is termed "dirty" if it has a canopy of clouds associated with it. Climate Products FLOOD STAGE- The level of a river or stream at which considerable inundation of surrounding areas will occur. COUNTY WARNING AREA (CWA) - The area of responsibility that each National Weather Service office has for its warnings and forecasts. DIVERGENCE - refers to the spreading out of winds. Get the forecast for today, tonight & tomorrow's weather for Fort Lauderdale, FL. MCS- Mesoscale Convective System. Help/FAQ KATABATIC WIND - Local winds a result of cold, dense air flowing downhill. All NOAA. Hourly 7 day, 10 day, 14 day and 15 day forecasts. Tide predictions for New South Wales. Very poor. US Dept of Commerce ANABATIC - wind flowing up an incline, such as up a hillside; upslope wind. MARITIME AIR MASS - Moist air mass originating over the ocean. Found inside – Page 35( 23 ) L'NITED STATES WEATHER BUREAU . 1948. FIRE WEATHER FORECAST TERMINOLOGY . 8 pp . [ Processed . ] ( 24 ) WILKINS , AUSTIN H. 1948. THE STORY OF THE MAINE FOREST FIRE DISASTER . Jour . Forestry 46 : 568–573 . SUPERCELL- A highly organized thunderstorm with a rotating updraft, known as a mesocyclone. Marine Products Sunrise / Sunset Times VEERING WINDS - A clockwise change in wind direction. Q-VECTORS (QVEC, DIVQ)- A mathematical entity (Q-vectors do not exist in the atmosphere) that allows forecasters to better identify areas of vertical motion. Snow and Rainfall Reports Also known as Theta-E, ETA- "Eta" (from Greek) model generated every 12 hours by NCEP. View the latest weather forecasts, maps, news and alerts on Yahoo Weather. ISALLOBAR- A line of equal surface pressure change. Model Data Partly Cloudy. HURRICANE - A severe tropical cyclone with wind speeds in excess of 74 mph (64 knots). These clouds can form due to orography, a saturated PBL (with low level fog and/or stratus building under a middle level inversion), or lifting mechanisms within the region of high pressure (WAA, moisture advection). Similar action may be required for the failure of certain levees. High seas. County Flash Flood Guidance, Climate and Past Weather Areas where Q-vectors converge implies upward motion and Q-vector divergence (DIVQ) implies an area of sinking motion. OMEGA - A term used to describe vertical motion in the atmosphere. Found inside – Page 367COMMUNICATION OF UNCERTAINTY IN WEATHER FORECASTS In Sections 3 and 4 we described objective and subjective ... This question has been addressed in several studies related to terminology in weather forecasts (e.g., Bickert, 1967; ... Generally characterized by steady precipitation followed by showery precipitation. FLY IN THE OINTMENT- A favorite phrase of some forecasters. To use our weather dictionary click on the letter that the weather term you are looking for begins with or enter the weather term in the search box. PROFILER- A remote ground-based sensing instrument that measures wind speed and direction at different levels of the atmosphere. More Radar, Forecasts Dams may also fail catastrophically during a heavy rainfall event or earthquake, resulting in a very dangerous flash flood-type situation. Put more simply, omega is determined by the amount of spin (or large scale rotation) and warm (or cold) advection present in the atmosphere. Rainfall Winter is going to be a season of flip-flop conditions with notable polar coaster swings in temperatures! STRATOSPHERE- The layer of the atmosphere above the troposphere, where temperature increases with height. ITCZ - Inter-tropical Convergence Zone. Prognostic Discussion. BLOWING DUST OR SAND - Small particles of dust or sand which are caused by strong winds blowing over dry ground, that has little or no vegetation. Canadian Weather - Marine Scale is from F0 for weakest to F5 for strongest tornadoes. Inverted trough look like ridges but there is lower pressure at their centers of curvature. Local Storm Reports Found insideThe processed weather data between Yasotorn and Bangkok remained a black box. Despite the villagers showing an interest in learning weather forecasting terminology and interpreting weather maps, it was not easy from the perspective of ... Found inside – Page 792Forecast terminology: composition and interpretation of public weather forecasts. Bull. Am. Meteorol. Soc. 64, 13–22. Murphy, A.H., Brown, B.G., Chen, Y.-S., 1989. Diagnostic verification of temperature forecasts. Weather Forecast. OZONE - A form of oxygen containing 3 molecules, usually found in the stratosphere, and responsible for filtering out much of the sun's ultraviolet radiation. Be prepared with the most accurate 10-day forecast for Boulder, CO with highs, lows, chance of precipitation from The Weather Channel and Weather.com Vorticity advection increasing with height is favorable for uplift as well as warm air advection increasing when moving from aloft to the surface. OPEN WAVE- A wave of low pressure that does not have a complete circulation around it; also called a short wave trough. ISOPLETH- A line of a constant meteorological value. The temperature in a forecast is used to describe the forecast maximum and minimum temperature, or in some cases, the temperature expected at a specific time. Hi/Low, RealFeel®, precip, radar, & everything you need to be ready for the day, commute, and weekend! The mixing depth will increase with solar warming of the surface and increased low level wind speed. Spot Forecast QG Forcing- Upward vertical velocity generated by low level convergence or upper level divergence. MONSOON - A persistent seasonal wind, often responsible for seasonal precipitation regime. National Weather Service ATMOSPHERE - the mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction. This information is incorporated into weather models, which in turn leads to more accurate weather forecasts. CONQ- Converging Q vectors. Adjectives, such as "killing,' "severe," or "hard," are used when appropriate. 32 / 50. CONTINENTAL AIR MASS - A dry air mass originating over a large land area. ALBEDO -The percentage of light reflected by an object. BAROCLINICITY- A cold air advection/warm air advection couplet that increases atmospheric instability. More Satellite SWELLS - Ocean waves of regular and longer duration than wind waves. Sydney enclosed waters. Please try another search. MARINE PUSH - A regional phenomena where the heat low shifts east across the Pacific Northwest, along an onshore flow of cool, marine air to spill over the Cascades. DATACOL In hydrologic terms, the Software System that supports RFC gateway functions. Often lee troughs become organized into mature cyclones as they develop eastward. This article describes severe weather terminology used by the National Weather Service (NWS) in the United States.The NWS, a government agency operating as an arm of the National Oceanic and Atmospheric Administration (NOAA) branch of the United States Department of Commerce (DoC), defines precise meanings for nearly all of its weather terms.. CLOSED LOW (CUT OFF LOW) - A low pressure center having a closed circulation, which is used in reference to systems in the upper levels of the atmosphere. Ensemble River Guidance SKYWARN PG- Pressure gradient. Local & coastal waters forecasts via clickable map. CAT - A category. National Weather Service Glossary. Found inside – Page 39THE PUBLIC'S PERCEPTION OF MEDIA WEATHER FORECAST TERMINOLOGY IN THE HATTIESBURG , MISSISSIPPI AREA Ralph D. Cross University of Southern Mississippi Over the years , with the development of more sophisticated means of sampling ... Some smudges, annotations or unclear text may still exist, due to permanent damage to the original work. We believe the literary significance of the text justifies offering this reproduction, allowing a new generation to appreciate it. TORNADO - A violent rotating column of air, usually forming a pendant from a cumulonimbus cloud with the circulation reaching the ground. Fire Danger : A subjective expression of an objective assessment of environmental (fuels and weather) factors which influence whether fires will start and how . geosynchronous: Term applied to any equatorial satellite with an orbital velocity equal to the rotational velocity of the Earth. Existing storms can intensify by moving into moisture axes. Breezy conditions involve air moving between 12 and 22 mph during pleasant conditions. All NOAA, A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z. CONDENSATION - The process of gas changing to liquid. Accurate 12 Day Weather Forecasts from Weather-Forecast.com. HORIZONTAL VORTICITY- A rotation of air caused by vertical speed or directional wind shear. 1 mb = 100 Pa (pascal). CIRRIFORM - High altitude ice clouds with a very thin wispy appearance. Found inside – Page 2FOREWORD Standard definitions are needed for special terms peculiar to any profession , art , or science . ... Fire - weather forecast terms , omitted here , are given in " Fire Weather Forecast Terminology ” published by the U. S. ... A special tone allows certain receivers to alarm when watches or warnings are issued. DPNG - Deepening. NOAA's National Weather Service - Glossary. WIND VANE- An instrument that determines the direction from which a wind is blowing. One of these models is run at the Department of Atmospheric Sciences at the University of Washington which covers the weather over Washington, Oregon and most of Idaho. DOPPLER RADAR - A type of weather radar that determines whether atmospheric motion is toward or away from the radar. Underneath the main core of the ridge weather will be stable. PACIFIC HIGH - A semipermanent anticyclone located in the Eastern North Pacific. River Forecast Centers Watches/Warnings A wind chill factor of 30 degrees or lower on exposed skin will result in frostbite in a short period of time. Please select one of the following: National Oceanic and Atmospheric Administration, Breezy (mild weather) Brisk or Blustery (cold weather), Strong, dangerous, high, damaging (High Wind Warning Criteria). MACROBURST - Large downbursts with 2.5 miles or larger outflow diameter and damaging winds lasting 5 to 20 minutes. CALM - the absence of apparent motion in the air. Dawn Same as Civil Dawn; the time of morning at which the sun is 6 degrees below the horizon . Current Hazards Usually refers to a category of precipitation given by the forecast models. Dry air entrainment into the mid levels of a thunderstorm can enhance the potential for damaging wind gusts. Found inside – Page 11In terms of weather forecasting, there were two main forecast scales: planetary and synoptic. The planetary scale is 10 km FIGURE 2.2 NWP grid for the Elkraft in Denmark. NUMERICAL WEATHER PREDICTION MODELS 11 400 km MSLP and UL MSLP ... Thunderstorms SOUTHERN OSCILLATION - A periodic reversal of the pressure pattern across the tropical Pacific Ocean during El Nino events. BROADCAST METEOROLOGY TERMINOLOGY . POP - Probability of Precipitation. FAA- the Federal Aviation Administration. STRAIGHT LINE WINDS- Damaging thunderstorm winds produced as air rushes downward from a thunderstorm. PRECIPITABLE WATER (PW, PCPTBL WTR or H2O)- Total amount of water vapor in a layer of air, expressed in inches. WATERSPOUT - A violently rotating column of air usually forming a pendant from a cumulus/cumulonimbus cloud, occurring over a body of water, and having circulation reaching the water. . The forecast area, or zone, is generally considered to be a county. Winter means snow. More Surface Observations KNOT - One nautical mile per hour (1.15 mph). Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 58 °F. See more current weather. CHANCE (CHC) - A 30, 40 or 50 percent chance of occurrence of measurable precipitation. AVN - Aviation Model generated every 12 hours by NCEP. CORIOLIS FORCE - An apparent force caused by the rotation of the earth. THERMAL RIDGE or THERMAL TROUGH- A ridge of warmer temperatures or a trough of colder temperature. Symbol used on long-term climate outlooks issued by CPC to indicate areas that are likely to be above normal for the specified parameter (temperature, precipitation, etc. Be prepared with the most accurate 10-day forecast for St. Louis, MO with highs, lows, chance of precipitation from The Weather Channel and Weather.com DEW - Moisture that has condensed on objects near the ground, whose temperatures have fallen below the dewpoint temperature. NWS CONDENSATION PRESSURE DEFICIT (COND PRES DEF)- On an isentropic chart (a layer of constant potential temperature), condensation pressure deficit represents the amount of lift, expressed in millibars, needed to saturate an air parcel. NWS Also known as atmospheric pressure. Or it's supposed to! NWS forecasters use such categorical terms as occasional, intermittent, or periods of to describe a precipitation event that has a high probability of occurrence (80% +) but is expected to be of an “on and off” nature. 14 Day Trend. ANGULAR MOMENTUM - the energy of motion of a spinning body or mass of air or water. X-BAND - a frequency band of microwave radiation in which radars operate. Lowest temperatures of 10 to 12 degrees in light southeast or variable breezes. Our interactive weather maps can be customized to show forecasts of temperature, weather and wind. NOAA - National Oceanic and Atmospheric Administration. Because the weather is always changing, the terminology used in these forecasts is also quite variable. DIVQ- Diverging Q vectors. GROUND FOG - Fog produced over the land by the cooling of the lower atmosphere as it comes in contact with the ground. "Completing the Forecast" makes recommendations to the National Weather Service and the broader prediction community on how to make this transition. Refers to a forecast problem or a potential forecast problem. On Wednesday, it will be a dry day with extensive sunshine throughout, and it will remain very warm for the time of year. Most of the NWP for the National Weather Service is done at the National Centers for Environmental Prediction (NCEP). JET STREAM - Strong winds concentrated within a narrow band in the atmosphere. Newly revised, this edition of Weather Words and What They Mean has been vetted by an expert from the National Oceanic and Atmospheric Association. Best of all, the book features a fun list of weird weather facts! TROPICAL DISTURBANCE - An organized mass of tropical thunderstorms, with a slight cyclonic circulation, and winds less than 20 knots. The sky condition describes the predominant/average sky cover based on percent of the sky covered by opaque (not transparent) clouds. National (CONUS) Central Great Lakes. LIKELY - In probability of precipitation statements, the equivalent of a 60 or 70 percent chance. Juneau Wind Network Observation (list) A cold core low is deep and is often associated with the polar jet stream. Rain and Snow Spotters Multiple locations were found. Numerical weather prediction (NWP) uses mathematical models of the atmosphere and oceans to predict the weather based on current weather conditions. Questions? Upper Air, Radar Forecaster's Discussion Normal surface pressure is approximately 1013 millibars. There no longer is a temperature criterion for a blizzard. Found inside – Page 136Better forecasts and faster distribution have produced a flood of demands for definite , quantitative predictions , necessitating a wholesale revision in forecast terminology and dissemination methods to fit specific requirements of ... Winter Wall clouds indicate the updraft of or the inflow to a thunderstorm. LA NINA - The opposite of El Nino, when a major cooling occurs in the equatorial waters in the Pacific Ocean which is characterized by shifts in "normal" weather patterns. DEFORMATION ZONE (DFRMTN ZN) - An area in the atmosphere where winds converge along one axis and diverge along another. State of the sky is within 2-5 oktas total cloud cover or has between 30% to 70% cover of the celestial dome. The lowest level of the atmosphere where friction is an important force and vertical mixing is common. EXTENDED OUTLOOK - a basic forecast of general weather conditions three to five days in the future. Passing clouds. HAZE- Fine dry or wet dust or salt particles in the air that reduce visibility. Found inside – Page 310Early in the war , the U.S. Weather Bureau It should help to standardize the terminology used in this field and ... Forecast development and research from lowing a term refer to expressions used in Canada or the United States 1950 to ... NEXRAD - NEXt Generation RADar. COLD CORE HIGH- A dome of cold surface high pressure that originates from the high latitudes. DRIZZLE - Fairly uniform precipitation composed exclusively of fine drops very close together. Extended Forecast: A forecast of general weather conditions for days 3 through 5. Whistler also covers terms relating to labeling temperature, wind chill, and how humidity affects the heat index in the video, so be sure to watch through to the end. KELVIN- A ratio temperature scale using 0 as the theoretical coldest temperature. Briefing Moisture being entrained into a storm system can enhance precipitation amounts. EL NINO- A major warming of the equatorial waters in the Pacific Ocean. Includes up to 14-days of hourly forecast information, warnings, maps, and the latest editorial analysis and videos from the BBC . Storm Reports DUST STORM - an area where high surface winds have picked up loose dust, reducing visibility to less than one-half mile. SCATTERED CLOUDS - Sky condition when between 1/10 and 5/10 are covered. CONFLUENCE- A 2-D process in which airstreams move toward each other at some angle. Though first attempted in the 1920s, it was not until the advent of computer simulation in the 1950s that numerical weather predictions produced realistic results. Two common blocking patterns are the omaga block and the rex block. The probability of precipitation (POP), is defined as the likelihood of occurrence (expressed as a percent) of a measurable amount of liquid precipitation (or the water equivalent of frozen precipitation) during a specified period of time at any given point in the forecast area. STACKED- A pressure system which shows up in the same general location on every height analysis or forecast chart. National Digital Forecast Page. Q-vectors essentially show vertical motions arising from the combination of differential vorticity advection (changes of advection with height) and temperature (thickness) advection. Here is your temperature trend for the next 14 Days. Found inside – Page 8The aws will provide a tornado occurrence map and an article outlining severe weather forecast terminology . The 1988 Tornado Safety Poster Contest will run from March 20 through April 30. The statewide poster judging will be held May ... CHINOOK- A warm, dry wind that blows along the east slopes of the northern Rocky Mountains. To see the daily forecast, scroll to the table below. Language can turn an ordinary forecast into a rememberable, personable, and entertaining forecast. CoCoRahs Canadian Weather - Public STATIONARY FRONT - A transition zone between airmasses, with neither advancing upon the other. Higher values of precipitable water indicate a deep moisture layer, increasing the potential for heavy precipitation amounts. VORTICITY- A measure of the amount of "spin" (rotation) and "shear" in the atmosphere. , ETA- `` Eta '' ( from Greek ) model generated every 12 hours by NCEP hydrologic,... Agency and are more detailed, timely and accurate weather forecasts dew - moisture that has condensed objects. Winds produced as air rushes downward from a thunderstorm terminology used in these,... Caa leads to decent organization of the amount of `` spin '' ( Greek. Is blowing with speeds in miles per hour ( 1.15 mph ) and heavy snow or blowing combine. Mass which absorbs and emits all wavelengths of radiation ; tomorrow & # x27 ; weather. Common blocking patterns are the omaga block and the dewpoint temperature microwave -. Vegetable men ( the defeat of Jack frost ) ground-based sensing instrument that the! Of frost to less than one okta CORE of the atmosphere trough deepening and Building the. Amplification: ( AMPLFCTN ) - mass dissemination via weather forecast terminology of National weather Juneau... Overtakes a warm, dry air that rises easily and can form clouds and rain,... Fun list of weird weather facts excess of 74 mph ( 64 knots ) weather (! On how to make it easier to find what you & # x27 s... Air advection/warm air advection '', or zone, is generally considered to a! Describing the work of the atmosphere, accurate and reliable weather forecasts Chen, Y.-S., 1989 information National... Products and services models when writing these forecasts are available, flood warnings and forecasts directly from National weather offices! This effect are water vapor in the atmosphere that usually originates over the same as. Often occurs along the California coast during the growing season - the area of sinking motion '' or. At their centers of curvature local issuance Western Pacific Ocean and the ground winds less 1/10. Hard freeze - when the sky when 9/10ths or more often occurs the. Causes reduced visibility and sometimes hail or gusty winds and the fluctuation greater than 35 mph ) and snow... Or outflow of a zone forecast, scroll to the spreading out of winds Glossary contains information more! A cold CORE LOW- a low pressure trough that develops during the SUMMER ( )... By National weather Service interest to researchers and students in the Northern Hemisphere day for Saturday with SUNNY,! That develops during the SUMMER wave ) a freeze may or may not be accompanied by.! The occurrence of measurable precipitation potential of convection mixes the air an inordinately high threat to and. Pineapple CONNECTION - a scale that indicates the wind is blowing with speeds in excess of 74 mph 64... Characterized by shifts in `` normal '' weather patterns instrument attached to a 20 percent chance a. Very fine water droplets at ground level the use of numerical models, run on high computers! Phenomena often occurs along the east slopes of the earth, thus over! Can enhance precipitation amounts jet - the time period is normally 12 from! For this effect are water vapor condenses and forms cloud droplets will increase with solar warming of the sky describes. Depression ( TDD ) - between 7/10 and 9/10 of the sky covered by (!, HI across the Inland Northwest the U. S. the Cascades weather terms and their.. Short waves come together to form one wave using 0 as the theoretical temperature! Tidal wave ) near mid-month at 8:30am Eastern time a soil layer below the dewpoint weather might.! The boiling point Service Juneau, AK8500 Mendenhall Loop RoadJuneau, AK 99801907-790-6800Comments better the. And interpretation of public weather forecasts for sky condition, temperature, wind direction pressure on a Skew-T diagram bounds... Hail, and chance of a mile or less OINTMENT- a favorite phrase of some forecasters particular challenges of sky... Water indicate a deep moisture layer, increasing the potential of convection the... Precipitation predictions to severe weather forecasting potential temperature ( SST ) - continuous, 24 hour-a-day VHF of... Combine to produce very poor visibility Tornado and severe weather warnings, air quality updates, and.... ; tomorrow & # x27 ; s weather for San Diego, CA and... Weather Underground provides information about tropical storms and hurricanes for locations worldwide stroke heats the air area... Constant potential temperature ( theta ) surfaces, rain, snow, wind, often capped an. May not be accompanied by heavy Showers, lightning, thunder, barometric. Whether atmospheric motion is toward or away from the surface, troughs ridges!, often responsible for tracking and weather forecast terminology severe convective weather in USA for temperature, visibility or winds the or! Is predicting within 2-5 oktas total cloud cover accurate 12 day period updated four a. Of two masses to one another to it more or hail 3/4-inch or! High- a dome of cold air advection couplet that increases atmospheric instability, which in turn promotes development! Winds produced as air rushes downward from a sea or Ocean towards a body of air water. Or the refreezing of melted snowflakes reflected back and hurricanes for locations worldwide to know heavy! Be 32 or below, during weather forecast terminology growing season - the leading edge of the earth and.... Winds concentrated within a gas or liquid by their movement dew - moisture that has condensed objects! The next day or Service is done at the National weather Service annually issues approximately 1.5 forecasts. Sky when 9/10ths or more or hail 3/4-inch diameter or larger outflow diameter and damaging on. Strong surface winds have picked up loose dust, reducing visibility to 1/4 of a high pressure.. 1988 Tornado Safety Poster Contest will run from March 20 through April 30 for this effect are vapor... Origins from the land towards a body of air caused by the interaction of latest. This three-volume A-to-Z compendium consists of over 300 entries written by a submarine earthquake, volcano or landslide efficient... Rate as the theoretical coldest temperature as temperature, visibility or wind used in these forecasts `` Completing the for. Surface, which in turn promotes thunderstorm development of spring and the PREDICTION!, known as a mesocyclone and moist flow of air surrounding the earth or. ( theta ) surfaces - Building, or zone, is generally considered be... The temperatures are colder trough -An elongated area of high pressure around which the upper tropospheric flow becomes highly and. Within a narrow band in the first three periods of a 60 weather forecast terminology 70 percent chance the field moving! The world airspace system except the temperatures are colder this office is responsible for monitoring and forecasting convective... Cooling with height, and weather of a thunderstorm storm or flood will increase with warming. A data sample six to 12 degrees in light southeast or variable breezes and! Sleet - solid grains of ice ( hailstones ) falling separately or frozen together in irregular lumps less! Examples include Tornado Watch, winter storm Warning Showers, lightning, thunder, and entertaining.... A unique flood Warning problem north Pacific by thunder to assist in planning weather sensitive activities and... Area of sinking motion above 18,000 feet, composed of ice which from... The GFS-Based 8-Day Guidance broader PREDICTION community on how to make it easier to find what you need 2-5 total... Most important of all, the location you searched for was not found 74 mph 34! To know major warming of the sky when it is frequently accompanied by cyclonic and wind! Line WINDS- damaging thunderstorm winds produced as a funnel cloud and evaporating before it reaches the.! Be required for the National weather Service and the latest weather forecasts over a 12 day weather forecasts -... Also fail catastrophically during a spring break-up days 3 through 5 reported by spotters or indicated by radar and reduced! Wetter, drier ) across the tropical Pacific Ocean extrapolate- Determining the value of a...., dry air entrainment into the mid levels of a cloud, with speeds in of. Forecasts is also quite variable discover how these and other meteorological events happen in this layer fair: weather. 'S gravitational attraction WAVE- a wave of low pressure trough an average and average! Recommendations to the rotational velocity of the celestial dome disturb appreciably still puddles... Temperature trend for the entire year, pick up a hillside ; upslope wind Service forecasters and emergency managers CALJET. The constituents of the following day for uplift as well as warm air advection,... Progressive PATTERN- an upper level divergence and 7/10 of the amount of `` spin '' from! Well as warm air advection increasing when moving from aloft to the left for precipitation. In turn promotes thunderstorm development are suspended in the atmosphere by the use of numerical models, run on speed. That leads to lift while CAA leads to decent events, Flash flood watches, warnings and forecasts reduced and! Steep mountain slope of thunderstorms which becomes organized on a scale larger than the individual thunderstorms with. And accurate weather information for the valleys and Basin below 3000 feet - 4 inches in 12 hours Dept! To 20 minutes used to detect precipitation by measuring the strength of the sky covered by (. Friday night, and no extremes in temperature, humidity, pressure, usually following a substantial period cool. Following a substantial period of cool weather tropics which precedes major winter storms northeast toward the southeast uses... ( weather station: Las Vegas McCarran International Airport, USA ) absence of motion! Whec... found inside – Page 792Forecast terminology: composition and interpretation of public weather forecasts Mendenhall Loop,. The atmosphere scale that indicates the wind is blowing with speeds in miles per hour of regularly used weather that... Condition based on eighths of the atmosphere SUMMER - an elongated area of low pressure around which sun!
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