SUSTAINED WINDS: The wind speed obtained by averaging the observed values over a one minute period.
SWELLS: Ocean waves of regular and longer duration than wind waves.
Sustained winds or frequent gusts to 35 miles per hour or greater, and
Considerable falling and/or blowing snow reducing visibility to less than 1/4 mile.
Sustained winds 25 to 39 mph and/or gusts to 57 mph. Issuance is normally site specific. However, winds of this magnitude occurring over an area that frequently experiences such winds
Wind Chill ...
GALE FORCED - Sustained winds from 38 to 54 MPH. If a tropical cyclone is involved, the term TROPICAL STORM is used and its upper limit for the winds is extended to 73 MPH.
Wind Advisory- Sustained winds 25 to 39 mph and/or gusts to 57 mph.
Wind Chill Advisory- Issued when wind chill temperatures are expected to be 10 to 24F below zero for an extended period of time.
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, ...
Eastern (ME..SC, Lake Erie, Lake Ontario) - Sustained winds ranging between 25 and 33 knots (except 20 to 25 knots, lower threshold area dependent, to 33 knots for harbors, bays, etc.) ...
Inland Hurricane WarningIssued for interior counties that sustained winds of 74 mph or greater associated with a hurricane are expected within 24 hours.
Hurricane Force Wind WarningA warning for sustained winds, or frequent gusts, of 64 knots (74 mph) or greater, either predicted or occurring, and not directly associated with a tropical cyclone.
[112] Tip, however, does not solely hold the record for fastest sustained winds in a cyclone. Typhoon Keith in the Pacific and Hurricanes Camille and Allen in the North Atlantic currently share this record with Tip.
Hight Wind Warning: Sustained winds of at 40 mph or gusts of 50 mph or greater are expected to last at 1 hour.
Hoar Frost: Crystalline ice which forms on surfaces that are below freezing. Appear like feathers, needles, leaves, ferns.
The threshold conditions for it are usually sustained winds of 18 knots (21 mph) (less than 18 knots in some dangerous waters) to 33 knots (38 mph) inclusive or hazardous wave conditions (such as 4 feet or greater).
Hurricanes are cyclones that develop over the warm tropical oceans and have sustained winds in excess of 64 knots (74 miles/hour).
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).
Sustained winds in excess of gale force (more than 63km/h) lashed Adelaide and the southern coast of South Australia for 12 hours.
Hurricane warning: A warning that sustained winds 64 kt (74 mph or 119 kph) or higher associated with a hurricane are expected in a specified coastal area in 24 hours or less.
A hurricane which reaches Category 3 (sustained winds greater than 110 mph) on the Saffir/Simpson Hurricane Scale.
NOAA National Weather Service - Cite This Source - This Definition ...
HURRICANE The name for a tropical cyclone with sustained winds of 74 miles per hour (65 knots) or greater in the North Atlantic Ocean, Caribbean Sea, Gulf of Mexico, and in the eastern North Pacific Ocean.
A closed-circulation low pressure area of tropical origin with maximum sustained winds of less than 34 knots.
Tropical storm
A storm of tropical origin with maximum sustained winds in the range of 34-63 knots.
High Wind Warning - Issued when sustained winds of 40 mph or greater are occurring or expected to persist for an hour or longer or if winds of 58 mph or greater are expected for any duration.
Blizzard- A severe snow storm featuring sustained winds of more than 32 miles per hour, temperatures 10 degrees Fahrenheit or lower, and visibility of 500 feet or less.
The National Weather Service will issue these marine warnings for 1-minute sustained winds between 34 (39 mph or 63 kph) and 47 knots (54 mph or 87 kph) are expected at end of downwind fetch (nearshore or open waters).
Gallery ...
Hurricane Warning - A warning issued when sustained winds of 119 kilometers per hour or higher are expected within a specified coastal area in 24 hours or less.
Tropical depression An early stage in the development of a hurricane; sustained winds are at least 37 km (23 mi) per hour but less than 63 km (39 mi) per hour.
These storms usually have a radius of maximum winds that is larger than what is observed in purely tropical systems, and their maximum sustained winds have not been observed to exceed about 32 m s-1 (64 knots).
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.
Tropical cyclones with sustained winds above 73 miles per hour are known as hurricanes in the North Atlantic Ocean, Caribbean Sea, Gulf of Mexico and the Eastern North Pacific (east of the date line) and cyclones in the Indian Ocean.
 See also: Storm, Sustained wind, Water, Surface, Pressure
|
