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Ended official alertUpdated

Severe Thunderstorm Warning for Frederick, MD; Washington, MD; Berkeley, WV +1 more

This alert has ended.Kept for recent context. Do not use it as a current warning.

Official alert fields

What you need to know

Effective
Ended
Official severity
Severe
Official urgency
Immediate
Official certainty
Observed

What is happening

At 607 PM EDT, a severe thunderstorm was located over Shepherdstown, moving east at 20 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles....

What the bulletin says to do

For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.

Read official NWS bulletin

Full official description

Bulletin details

At 607 PM EDT, a severe thunderstorm was located over Shepherdstown, moving east at 20 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. Locations impacted include... Martinsburg, Shepherdstown, Ranson, Boonsboro, Mount Lena, San Mar, Kearneysville, Berkeley, Jefferson, Keedysville, Sharpsburg, Shenandoah Junction, Fairplay, Rohrersville, Burkittsville, Gapland, Brownsville, Antietam, Winebrenners Cross, and Arnoldtown.

Lifecycle record

Official revisions

2 captured
  1. Update

    Severe Thunderstorm Warning issued August 27 at 6:07PM EDT until August 27 at 6:30PM EDT by NWS Baltimore MD/Washington DC

    Official revision
  2. Alert

    Severe Thunderstorm Warning issued August 27 at 5:40PM EDT until August 27 at 6:30PM EDT by NWS Baltimore MD/Washington DC

    Official revision

Source and limitations

Publisher: Weather Alert Watch. Primary source: NWS Baltimore MD/Washington DC. This page reorganizes official fields and does not add a forecast or expand the affected area.

CAP status
Actual
Message type
Update
Last collected
Methodology and corrections