A frontal boundary extending from the western High Plains to the Southeast will focus additional showers and thunderstorms this weekend. Some of these storms may become severe, alongside frequent lightning, and isolated instances of flash flooding. Meanwhile dry conditions will continue for the Great Basin where fire weather concerns linger. For the mid-Atlantic and Northeast, seasonable weather. Read More >
Biggest Takeaway:
While not routine, these warnings are something that will occur several times most years. Be inside a sturdy structure. Severe/Damaging Thunderstorms cause most of the instances of wind damage in our region. Wind damage from a severe thunderstorm is 10x more likely than a tornado.
Warning/Trigger for Plan:
NWS Severe Thunderstorm Warning
Advance Notice/Time to Activate & Accomplish Your Planned Response:
Plan on 10-15 minutes advance warning before onset (allow there may be no advance notice, and it may be as much as 60 minutes).
Frequency:
Average is ~10/year at various times of day & night
How accurate are warnings?
If there is a Severe Thunderstorm Warning, it is nearly certain that there will be targeted wind damage in the warning area (and nearby to you). Often though, the damaging winds will not affect your specific location, and will only be "nearby" within a few miles. Most of the time however, you will at least get lightning and very heavy rain. How much risk can you tolerate from a damaging wind gust occurring on your location vs. nearby? The safest course of action is to shelter during the typical 15-45 minutes of the warning.