Gusts- A rapid fluctuation of wind speed with variations of 10 knots or more between peaks and lulls.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Gust, PK, Rain Shield, Unimodal, Wind Gust
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'Gusts' are inconstant winds. Unlike relatively constant winds, such as the Chinook wind, gusting winds are characterized by the apparent rapid change in the force and/or direction of the wind.
"Frequent gusts"are typically long duration conditions (greater than 2 hours).
Recorded Wind Gusts
Mount Washington, NH
Franklin County, FL
Dry Tortugas, FL
Flattop Mountain, NC ...
BlizzardIncludes winter storm conditions of sustained winds or frequent gusts of 35 mph or more that cause major blowing and drifting of snow, reducing visibility to less than one-quarter mile for 3 or more hours.
* Eastern (ME..SC, Lake Erie, Lake Ontario) - Sustained winds or frequent gusts ranging between 25 and 33 knots (except 20 to 25 knots, lower threshold area dependent, to 33 knots for harbors, bays, etc.) and/or seas or waves 5 to 7 feet and greater, ...
This instrument is not used for station measurements because of the false reading which results when the frequency of the wind gusts and the natural frequency of the swinging plate coincide. This was the earliest form of anemometer.
Indirect HitGenerally refers to locations that do not experience a direct hit from a tropical cyclone, but do experience hurricane force winds (either sustained or gusts) or tides of at least 4 feet above normal.
The wind, both sustained and peak gusts, keeps increasing as much as one moves through the rain shield toward the storm's eye.Rain-free BaseA dark, horizontal cloud base with no visible precipitation beneath it.
19 Wind: Gusts. Squall. 20 Wind: High Pressure moves towrds low pressure. 21 Wind: High Wind Warning. 40mph or greater. 22 Wind: Hurricane. 74 mph 23 Wind: Jet Winds. 24 Wind: Katabatic. Cold & Dry. 25 Wind: Land Breeze.
Sustained wind or frequent gusts to 35 miles an hour or greater; and
Considerable falling and/or blowing snow (i.e., reducing visibility frequently to less than ¼ mile) ...
thunderstorm - (Sometimes called electrical storm.) In general, a local storm, invariably produced by a cumulonimbus cloud and always accompanied by lightning and thunder, usually with strong gusts of wind, heavy rain, and sometimes with hail.
Wind AdvisorySustained winds 25 to 39 mph and/or gusts to 57 mph. Issuance is normally site specific.
Gustiness factor Not much used anymore, this term was used to describe the variability in the wind conditions, based on short temporal measurements of wind gusts.
The wind is a continuous succession of gusts and lulls (quiet intervals) associated with equally rapid changes of direction over a range which may exceed 30°. The mean wind speed over a period of time is therefore the mean of many gusts and lulls.
A tropical depression of sufficient intensity to produce sustained gale force winds (sustained winds of 63 km/h or greater with gusts in excess of 90 km/h).
To describe short duration, non-severe, but potentially hazardous conditions which sustained winds or frequent gusts are less than 34 knots for 2 hours or less.
So, a wind observation might be SSE/4 gusts 5; or, upon a cold frontal passage, SSE/3-4 becoming SW ocnl W 3 gusting 4 or 5.
Reports of temperature should be in degrees C. Don't try for 1/10's degree accuracy unless the thermometer allows it.
Service for hazardous weather conditions (thunderstorms over water, thunderstorms that will move over water, cold air funnels over water, or waterspouts) usually of short duration (2 hours or less) and producing sustained winds or frequent gusts of ...
Microscale - a study of small gusts, eddies and things that last less than an hour, usually. Turbulence, diffusion, and wind shear are examples.
Millibar - an atmospheric pressure of 100 Pascals (Newtons per square metre).
Thunderstorm/Thundershower: A local storm produced by a cumulonimbus cloud that contains thunder and lightning and often strong wind gusts, heavy rain showers and, at times, hail.
SEVERE THUNDERSTORM: A thunderstorm with wind gusts in excess of 58 mph (50 knots), frequent lightning and hail with a diameter of 3/4" or larger.
SHOWER: Liquid precipitation with frequent changes in intensity or sudden stops or starts.
Severe Thunderstorm - a thunderstorm with wind gusts of 50 knots (58 mph) or greater, hail at least three-quarters of an inch in diameter, and/or a tornado or funnel cloud
Shear - see wind shear ...
Wind Advisory - Issued for the occurrence of wind gusts between 40 and 57 mph for any duration.
Windward Side - The side of an object that is facing into the direction that the wind is coming from.
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Gale Warning - A warning of sustained surface winds, or frequent gusts, in the range of 34 knots (39 mph) to 47 knots (54 mph) inclusive, either predicted or occurring, and not directly associated with a tropical cyclone.
TURBULENCE - Random swirling of the air felt as gusts and bumps in flight.
TWIST - See WASHOUT
TWO-AXIS CONTROL - A control system consisting of only rudder and elevator or weight-shift and rudder.
A wind reaching a mean speed of 39 miles per hour or gusts 49 miles per hour. Described as force 8 on the Beaufort scale.
General Circulation
The overall circulation of the entire atmosphere.
Severe Thunderstorm - A strong thunderstorm with wind gusts in excess of 58 mph (50 knots) and/or hail with a diameter of 3/4' or more. A thunderstorm with winds greater than 39 mph and/or hail greater than ? inch is defined as approaching severe.
It is sometimes stormy and may reach 20-25 m s−1 (40-50 mph) in gusts, especially in spring and fall. It raises temperatures to as much as 14°C above the normal for the season, and in winter and spring it causes avalanches.
Scales of motion The hierarchy of atmospheric circulations from tiny gusts to giant storms.
Scattering The process by which small particles in the atmosphere deflect radiation from its path into different directions.
Hailstones are composed of layers of ice and can become quite large when strong gusts of upward-moving air keep them inside the cloud.
Small Craft Advisory- a marine advisory issued for sustained winds and/or frequent gusts greater than twenty ><>Smog- a mixture of smoke and fog; a natural fog contaminated by industrial pollutants.
There are four areas of wind that are measured: direction, speed, character (gusts and squalls), and shifts.
Wind gusts associated with these storms can exceed hurricane force in intensity. A nor'easter gets its name from the continuously strong northeasterly winds blowing in from the ocean ahead of the storm and over the coastal areas.
down draft- a rapidly descending column of cooling air that causes heavy rains and violent wind gusts.
evaporation- process by which a liquid such as water becomes a gas.
Turbulence Any irregular or disturbed flow in the atmosphere that produces gusts and eddies.
Twilight The time immediately before sunrise and after sunset when the sky remain illuminated.
gust—A sudden brief increase in wind; according to U.S. weather observing practice, gusts are reported when the variation in wind speed between peaks and lulls is at least 10 knots.
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Severe Thunderstorm-Any one of the three conditions must be met. 1) Tornadoes 2) Hailstones larger than 3/4" 3) Wind gusts greater than 58 miles per hours.
While a severe thunderstorm may produce severe convective wind gusts that last for several minutes at a point location, derecho wind can last 30 minutes or longer.
Trough: on a weather chart, a narrow, elongated area of relatively low pressure.Turbulence: irregular motion of the atmosphere, as indicated by gusts and lulls in the wind.
U
Unstable air: see absolutely unstable air.
CORE - The center of a storm system. Thunderstorm precipitation cores usually contain the strongest non-tornadic wind gusts, largest hail, and heaviest rains.
Special Marine Warning
A warning for hazardous weather conditions, usually short and not adequately covered by existing marine warnings. Such conditions include sustained winds or gusts of 35 knots or more for 2 hours or less.
A weather station about five miles away measured a sudden 70 mph wind gusts and winds flattened trees and overturned sheds near the where the boat capsized. These sudden winds were probably faster than 70 mph when they hit the boat.
The criteria for this watch varies from state to state. In Michigan, the criteria is the potential for sustained non-convective (not related to thunderstorms) winds greater than or equal to 40 mph and/or gusts greater than or equal to 58 mph.
external instrumentsInstruments that belong to organizations that are outside of the ARM Program.extreme event timeThe time of extreme meteorological events such as min/max temperature and wind gusts.
 See also: Water, Weather, Wind, Temperature, Air
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