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Sleet warning WSW (alt.: heavy sleet warning) – Heavy sleet accumulations of 1 to 2 inches (2.5 to 5.1 cm) or more, which may cause significant disruptions to travel or utilities, are imminent or expected to occur within 12 hours. Discontinued beginning with the 2008-2009 winter storm season and replaced by the winter storm warning for heavy ...
Saffir gave the proposed scale to the NHC for their use, where Simpson changed the terminology from "grade" to "category", organized them by sustained wind speeds of 1 minute duration, and added storm surge height ranges, adding barometric pressure ranges later on. In 1975, the Saffir-Simpson Scale was first published publicly.
The United States Joint Typhoon Warning Center also monitors the basin, and issues warnings on significant tropical cyclones on behalf of the United States Government; [17] these systems are unofficially assigned TC numbers with either suffix "S" (if originating west of 135°E; spans the whole South Indian Ocean, including MFR's area of ...
Storm surge is an above-normal rise in seawater along the coast caused by a tropical storm or hurricane and exceeding normal astronomical tides. ... Katrina's storm surge flooding was between 25 ...
The National Weather Service's arrow showing the EF scale. This includes a description word for each level of the scale. The Enhanced Fujita scale (abbreviated as EF-Scale) is a scale that rates tornado intensity based on the severity of the damage they cause.
But the storm could reach the level of a hypothetical Category 6 − and further stir debate about whether the National Hurricane Center’s long-used scale for classifying hurricane wind speeds ...
These storm surge warnings include some areas up to 10 miles inland from the Gulf Coast itself in the Big Bend, in recognition that the peak NHC modeled storm surge of 10-15 feet will overspread ...
Dust Storm Warning (DSW) – Issued only in the Prairie Provinces when blowing dust caused by high winds is expected to reduce visibility to 800 m (0.50 mi) or less for one hour or more. Storm Surge Warning – Issued for abnormally high water levels and high waves caused by storms, which have the potential to cause coastal flooding. This ...