Alert archive / Maryland / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 95, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 10, 2020, 3:12 PM EDT for Allegany County, Washington County, Maryland; Hampshire County, Morgan County, West Virginia. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 10, 2020, 3:12 PM EDT (19:12 UTC)
- Expired
- Jun 10, 2020, 3:33 PM EDT
- In force
- 21 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Allegany County, MD, Washington County, MD, Hampshire County, WV, Morgan County, WV
The radar
The Sterling radar (KLWX), 96 km from the middle of the area, began a volume at 19:13 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.2 hours before the alert went out and 104 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 330 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 790 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 10, 11:09 AM EDT, 4 hours 3 minutes earlier.
Area forecast discussion, Jun 10, 11:09 AM EDT, 4 hours 3 minutes before
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</html>Hazardous weather outlook, Jun 10, 2:48 PM EDT, 24 minutes before
Hazardous Weather Outlook National Weather Service Baltimore MD/Washington DC 248 PM EDT Wed Jun 10 2020 ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-111900- Chesapeake Bay north of Pooles Island MD- Chesapeake Bay from Pooles Island to Sandy Point MD- Chesapeake Bay from Sandy Point to North Beach MD- Chesapeake Bay from North Beach to Drum Point MD- Chesapeake Bay from Drum Point MD to Smith Point VA- Tidal Potomac from Key Bridge to Indian Head MD- Tidal Potomac from Indian Head to Cobb Island MD- Tidal Potomac from Cobb Island MD to Smith Point VA- Patapsco River including Baltimore Harbor- Chester River to Queenstown MD-Eastern Bay- Choptank River to Cambridge MD and the Little Choptank River- Patuxent River to Broomes Island MD- Tangier Sound and the inland waters surrounding Bloodsworth Island-District of Columbia-Southern Baltimore-Prince Georges- Anne Arundel-Charles-St. Marys-Calvert-Southeast Harford- Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Stafford-Spotsylvania- King George- 248 PM EDT Wed Jun 10 2020 This Hazardous Weather Outlook is for the Maryland portion of the Chesapeake Bay, Tidal Potomac River, and adjacent counties in central Maryland and northern Virginia as well as the District of Columbia. .DAY ONE...This Afternoon and Tonight Isolated severe thunderstorms with damaging winds and large hail will be possible this afternoon and evening. Isolated instances of flooding from thunderstorm rains are also possible. The greatest risk of severe weather and flooding is in northern Maryland. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Isolated severe thunderstorms with damaging winds will be possible Thursday afternoon and evening. Isolated instances of flooding from thunderstorm rains are also possible. The greatest risk of severe weather and flooding is in southern Maryland. .SPOTTER INFORMATION STATEMENT... Spotter activation will be possible today. MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053- 055-501>506-111900- Washington-Frederick MD-Carroll-Northern Baltimore- Extreme Western Allegany-Central and Eastern Allegany- Northwest Montgomery-Central and Southeast Montgomery- Northwest Howard-Central and Southeast Howard-Northwest Harford- Augusta-Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke- Nelson-Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper- Northern Fauquier-Southern Fauquier-Western Highland- Eastern Highland-Western Loudoun-Eastern Loudoun- Northern Virginia Blue Ridge-Central Virginia Blue Ridge- Hampshire-Morgan-Berkeley-Jefferson-Hardy-Western Grant- Eastern Grant-Western Mineral-Eastern Mineral-Western Pendleton- Eastern Pendleton- 248 PM EDT Wed Jun 10 2020 This Hazardous Weather Outlook is for eastern West Virginia, northern and central Virginia, and central and western Maryland with the exception of Garrett County. .DAY ONE...This Afternoon and Tonight Isolated severe thunderstorms with damaging winds and large hail will be possible this afternoon and evening. Isolated instances of flooding from thunderstorm rains are also possible. The greatest risk of severe weather and flooding is in northern and western Maryland, eastern West Virginia and northwestern Virginia. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Isolated severe thunderstorms with damaging winds will be possible Thursday afternoon and evening. Isolated instances of flooding from thunderstorm rains are also possible. The greatest risk of severe weather and flooding is east of Interstate 95. .SPOTTER INFORMATION STATEMENT... Spotter activation will be possible today.
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 7:00 PM EDT | Special Marine Warning | LWX | 78 min | |
| Jun 10, 7:02 PM EDT | Severe Thunderstorm Warning | LWX | Fairfax, Loudoun, Prince William | 43 min |
| Jun 10, 7:23 PM EDT | Severe Thunderstorm Warning | LWX | Loudoun | 37 min |
| Jun 10, 7:45 PM EDT | Severe Thunderstorm Warning | LWX | Fairfax | 33 min |
| Jun 10, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 33 min |
| Jun 10, 3:37 PM EDT | Severe Thunderstorm Warning | LWX | Grant, Hampshire, Hardy, Mineral | 18 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2020Severe Thunderstorm Warnings in West Virginia, 2020Every severe thunderstorm warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.