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Tropical storm watch TRA – Tropical storm conditions (gale- and storm-force sustained winds of 34 to 63 knots [39 to 72 mph; 63 to 117 km/h]) are possible within the specified coastal or inland area within 48 hours in advance of the forecast onset of tropical-storm-force winds. These winds may be accompanied by storm surge, and coastal and/or ...
Also actiniform. Describing a collection of low-lying, radially structured clouds with distinct shapes (resembling leaves or wheels in satellite imagery), and typically organized in extensive mesoscale fields over marine environments. They are closely related to and sometimes considered a variant of stratocumulus clouds. actinometer A scientific instrument used to measure the heating power of ...
Severe weather can occur under a variety of situations, but three characteristics are generally needed: a temperature or moisture boundary, moisture, and (in the event of severe, precipitation-based events) instability in the atmosphere.
The National Weather Service issued its first-ever blizzard warning for the county, with roads and bridges shuttered by the storm. (12:24 p.m. ET) Texas Transportation Department Deploys Plows To ...
The system, named Winter Storm Enzo by The Weather Channel, was a once-in-a-lifetime winter storm for areas of Louisiana and Alabama that saw snow totals beyond 10 inches. Coteau, Louisiana, saw ...
Storm chasing – Traveling with the intent to observe tornadoes and other severe weather. Storm interaction; Storm merger; Storm relative environmental helicity (SREH) or storm relative helicity (SRH) Storm shelter; Storm spotting – The observation of severe weather by individuals trained in weather and reporting. Spotters can be stationary ...
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Red flag criteria is generally when relative humidity is at 15% or less, combined with sustained winds and/or gusts of 25 mph or greater. Both of these conditions must occur simultaneously for at ...