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Severe Thunderstorm Watch 400
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WW0400 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Low Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL0

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 400
   NWS Storm Prediction Center Norman OK
   135 PM EDT Wed Jun 22 2022

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     District Of Columbia
     Western Maryland
     Central Pennsylvania
     Northern Virginia
     Eastern West Virginia Panhandle
     Coastal Waters

   * Effective this Wednesday afternoon and evening from 135 PM
     until 900 PM EDT.

   * Primary threats include...
     Scattered damaging wind gusts to 70 mph likely
     Isolated large hail events to 1.5 inches in diameter possible

   SUMMARY...Initially discrete cells should develop both along a
   north/south-oriented front and eventually along a secondary front
   shifting east from the Upper Ohio Valley. Multicell clusters will
   dominate with time and largely pose a threat for damaging winds.

   The severe thunderstorm watch area is approximately along and 55
   statute miles east and west of a line from 50 miles northwest of
   Williamsport PA to 20 miles east southeast of Charlottesville VA.
   For a complete depiction of the watch see the associated watch
   outline update (WOUS64 KWNS WOU0).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A Severe Thunderstorm Watch means conditions are
   favorable for severe thunderstorms in and close to the watch area.
   Persons in these areas should be on the lookout for threatening
   weather conditions and listen for later statements and possible
   warnings. Severe thunderstorms can and occasionally do produce
   tornadoes.

   &&

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   36025.

   ...Grams
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Page last modified: June 23, 2022
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