Wind
| Region/Country | Description |
|---|---|
| US | Sustained winds, or frequent gusts, of 64 knots (74 mph) or greater Sustained winds of 74 mph or greater associated with a hurricane Sustained winds of 39 to 73 mph associated with a tropical storm Sustained wind speeds of 40 mph or greater lasting for 1 hour or longer, or winds of 58 mph or greater for any duration. Storms range in scale from tornadoes and thunderstorms to tropical cyclones to synoptic-scale extratropical cyclones. An extratropical low or an area of sustained surface winds of 34 (39 mph) to 47 knots (54 mph). An announcement that a tropical storm poses or tropical storm conditions pose a threat to coastal areas generally within 36 hours. A tropical storm watch should normally not be issued if the system is forecast to attain hurricane strength. An announcement of specific coastal areas that a hurricane or an incipient hurricane condition poses a possible threat, generally within 36 hours An advisory for wave heights lower than small craft advisory criteria, yet wind speeds are potentially hazardous. Thresholds governing the issuance of small craft advisories are specific to geographic areas. E.g. 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.) 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 warning can remain in effect when dangerously high water or a combination of dangerously high water and exceptionally high waves continue, even though winds may be less than hurricane force. A warning for sustained surface winds, associated with a tropical cyclone, within the range of 34 to 63 knots (39 to 73 mph), expected in a specified coastal area within 24 hours. A violently rotating column of air, usually pendant to a cumulonimbus, with circulation reaching the ground. It nearly always starts as a funnel cloud and may be accompanied by a loud roaring noise. On a local scale, it is the most destructive of all atmospheric phenomena. A violently rotating column of air, usually pendant to a cumulonimbus, with circulation reaching the ground. It nearly always starts as a funnel cloud and may be accompanied by a loud roaring noise. On a local scale, it is the most destructive of all atmospheric phenomena. A tropical cyclone in which the maximum 1-minute sustained surface wind ranges from 34 to 63 knots (39 to 73 mph) inclusive. |
| CA | A Hurricane Warning is issued for coastal waters where winds greater than 117 km/h are expected. It may also include areas where storm surge or exceptionally high waves are predicted, even though winds may be less than hurricane force. Warnings are not issued more than 24 hours in advance. If the path is erratic or if the hurricane undergoes post tropical transition, the warning may only be issued a few hours in advance. A Hurricane Watch is issued when a hurricane approaches the mainland and is considered a threat to coastal and inland regions. It gives people in the threatened area time to plan in the event that a warning is issued. This watch does not mean that a hurricane is definitely going to strike. It means that everyone in the area covered by the alert should be prepared to act quickly if warnings are issued that a hurricane will strike A Tornado Warning is issued when one or more tornadoes are occurring in the area specified or detected on Doppler radar. The expected motion, development and duration will be given in the warning. Find appropriate shelter. A Tornado Watch is issued when severe thunderstorms have developed and there is the possibility of one or more tornadoes developing within the areas and times specified in the watch. Be prepared to take action if a warning is issued. A Tropical Storm Warning is issued when winds of 63 to 117 kilometers per hour are expected. Warnings are not issued more than 24 hours in advance. Now is the time to put your plan into action. A Tropical Storm Watch is issued when a tropical storm or tropical storm conditions pose a threat to coastal areas generally within 36 hours. A watch will generally cover a larger threat area than a warning, as the uncertainty on the track of the storm is greater. Now is the time to develop a plan. A Wreckhouse Warning is used when winds are expected to be at least 65 km/hr with gusts to 90. With a Wind Warning expect inland winds blowing steadily at 60-65 km/h or more, or winds gusting to 90 km/h or more. Les Suêtes Wind Warning is issued for winds 65 km/h with gusts to 90. These winds occur over a specific area of the western Cape Breton highlands during certain unique meteorological conditions. Gale Warning will come into effect when winds of 34 to 47 knots are forecast. Waterspout Watch is issued when conditions favourable for the development of waterspouts are forecast over the marine area during the time specified in the watch. The waterspout is another type of weak tornado that occurs only over water which is short-lived and very localized. When winds are forecast to reach sustained speeds of 60 km/h or more for three hours or more and/or when wind gusts of 90 km/h or more are expected. |
| EU | Repeated gusts of 70 m.p.h. or more over inland areas. |
| JP | Storm wind special alarms will be announced when typhoons of the intensity once in decades or similar temperate cyclones are expected to cause windstorms to blow. Issued when serious disasters are expected to occur due to storm surges caused by tropical cyclones etc. Issued when serious disasters are expected to occur due to winds of 20m/s or greater. |
| AU | Marine Wind Warning Tropical Cyclone Warning Tropical Cyclone Watch. |
| DE | > 50 km/h, 14 m/s, 28 kn, 7 Bft 105 bis 115 km/h, 29 bis 32 m/s, 56 bis 63 kn, 11 Bft 65 bis 85 km/h, 18 bis 24 m/s, 34 bis 47 kn, 8 Bft bis 9 Bft 90 bis 100 km/h, 25 bis 28 m/s, 48 bis 55 kn, 10 Bft Ab 120 km/h, ab 33 m/s, ab 64 kn, 12 Bft Überörtlich mehr als 140 km/h. |
Updated 29 days ago