Alert archive / West Virginia / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 95, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 9, 2009, 3:04 PM EDT for Frederick County, Virginia; Allegany County, Maryland; Hampshire County, Mineral County, Morgan County, West Virginia. It was in force for 41 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 9, 2009, 3:04 PM EDT (19:04 UTC)
- Expired
- Jun 9, 2009, 3:45 PM EDT
- In force
- 41 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
Counties Allegany County, MD, Frederick County, VA, Hampshire County, WV, Mineral County, WV, Morgan County, WV
The radar
The Sterling radar (KLWX), 105 km from the middle of the area, began a volume at 19:05 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 9, 2:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.1 hours before the alert went out and 113 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
- 1056 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 944 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
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 9, 2:25 PM EDT, 39 minutes earlier.
Area forecast discussion, Jun 9, 2:25 PM EDT, 39 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 219 PM EDT TUE JUN 9 2009 ANZ530>537-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 101330- 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- DISTRICT OF COLUMBIA-NORTHERN BALTIMORE-HARFORD- SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS- CALVERT-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX- ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA- KING GEORGE- 219 PM EDT TUE JUN 9 2009 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 A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM FOR THE AREA. A FLASH FLOOD WATCH HAS BE ISSUED ALONG THE I-95 CORRIDOR THIS AFTERNOON AND EVENING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY ADDITIONAL THUNDERSTORMS CAN BE EXPECTED THURSDAY. THERE MAY BE A RISK OF SEVERE WEATHER DURING THE AFTERNOON AND EVENING HOURS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS IN EFFECT. MDZ003>005-009-010-501-502-VAZ021-025>031-036>042-050-051- WVZ050>055-501>504-101330- WASHINGTON-FREDERICK MD-CARROLL-MONTGOMERY-HOWARD- EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-HIGHLAND- AUGUSTA-ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE- NELSON-ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-FAUQUIER-LOUDOUN- ORANGE-CULPEPER-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-PENDLETON- HARDY-WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL- 219 PM EDT TUE JUN 9 2009 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 A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM FOR THE AREA. A FLASH FLOOD WATCH HAS BE ISSUED FOR THIS AFTERNOON AND EVENING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY ADDITIONAL THUNDERSTORMS CAN BE EXPECTED THURSDAY. THERE MAY BE A RISK OF SEVERE WEATHER DURING THE AFTERNOON AND EVENING HOURS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS IN EFFECT.
In the hours before
Special weather statement, Jun 9, 2:18 PM EDT, 46 minutes before
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</html>The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 8:07 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Greene, Madison, Orange, Rockingham | 38 min |
| Jun 8, 8:20 PM EDT | Severe Thunderstorm Warning | LWX | Greene, Madison, Page, Rockingham | 26 min |
| Jun 9, 5:27 AM EDT | Severe Thunderstorm Warning | LWX | Culpeper | 48 min |
| Jun 9, 5:47 AM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church | 28 min |
| Jun 9, 5:54 AM EDT | Special Marine Warning | LWX | 66 min | |
| Jun 9, 6:32 AM EDT | Special Marine Warning | LWX | 81 min | |
| Jun 9, 6:36 AM EDT | Special Marine Warning | LWX | 84 min | |
| Jun 9, 8:32 AM EDT | Special Marine Warning | LWX | 58 min | |
| Jun 9, 1:18 PM EDT | Flash Flood Watch | LWX | Arlington, Clarke, Culpeper, Fairfax, Frederick, Greene and 19 more | 7 hr |
| Jun 9, 2:44 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 46 min |
| Jun 9, 3:23 PM EDT | Severe Thunderstorm Warning | LWX | Shenandoah | 52 min |
| Jun 9, 3:38 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, Rockingham, City of Harrisonburg | 52 min |
| Jun 9, 3:43 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, City of Winchester | 47 min |
| Jun 9, 3:47 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Shenandoah | 43 min |
| Jun 9, 3:51 PM EDT | Severe Thunderstorm Warning | LWX | Loudoun | 39 min |
| Jun 9, 3:55 PM EDT | Flash Flood Warning | LWX | Augusta, Rockingham, City of Harrisonburg | 2 hr |
| Jun 9, 3:57 PM EDT | Special Marine Warning | LWX | 2 hr | |
| Jun 9, 3:59 PM EDT | Severe Thunderstorm Warning | LWX | Page, Rockingham, City of Harrisonburg | 46 min |
| Jun 9, 4:10 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Frederick, Loudoun, Warren, City of Winchester | 50 min |
| Jun 9, 4:15 PM EDT | Severe Thunderstorm Warning | LWX | Page, Shenandoah | 45 min |
| Jun 9, 4:21 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Fauquier, Frederick, Page, Rappahannock, Shenandoah and 1 more | 39 min |
| Jun 9, 4:26 PM EDT | Severe Thunderstorm Warning | LWX | Fairfax, Loudoun | 49 min |
| Jun 9, 4:27 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Augusta, Rockingham, City of Waynesboro | 48 min |
| Jun 9, 4:47 PM EDT | Special Marine Warning | LWX | 118 min | |
| Jun 9, 4:47 PM EDT | Special Marine Warning | LWX | 118 min | |
| Jun 9, 4:52 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Culpeper, Fairfax, Fauquier, Loudoun, Page and 3 more | 53 min |
| Jun 9, 4:55 PM EDT | Severe Thunderstorm Warning | LWX | Madison, Page, Rappahannock, Shenandoah | 54 min |
| Jun 9, 4:59 PM EDT | Severe Thunderstorm Warning | LWX | Fairfax, Loudoun | 61 min |
| Jun 9, 5:01 PM EDT | Special Marine Warning | LWX | 119 min | |
| Jun 9, 5:02 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Augusta, Nelson, City of Waynesboro | 58 min |
| Jun 9, 5:13 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, Loudoun, City of Alexandria, City of Fairfax, City of Falls Church | 62 min |
| Jun 9, 5:22 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, City of Charlottesville | 53 min |
| Jun 9, 5:26 PM EDT | Special Marine Warning | LWX | 2 hr | |
| Jun 9, 5:27 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Fairfax, Fauquier, Loudoun, Madison, Orange and 6 more | 63 min |
| Jun 9, 5:30 PM EDT | Special Marine Warning | LWX | 2 hr | |
| Jun 9, 5:46 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Fairfax, Fauquier, King George, Orange, Prince William and 3 more | 59 min |
| Jun 9, 5:59 PM EDT | Special Marine Warning | LWX | 46 min | |
| Jun 9, 6:04 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Nelson | 41 min |
| Jun 9, 6:12 PM EDT | Severe Thunderstorm Warning | LWX | Nelson | 48 min |
| Jun 9, 6:17 PM EDT | Severe Thunderstorm Warning | LWX | King George | 43 min |
| Jun 9, 6:45 PM EDT | Severe Thunderstorm Warning | LWX | King George, Orange, Spotsylvania, Stafford, City of Fredericksburg | 45 min |
| Jun 9, 6:49 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Nelson | 26 min |
| Jun 9, 7:25 PM EDT | Special Marine Warning | LWX | 50 min | |
| Jun 9, 6:02 AM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 43 min |
| Jun 9, 6:51 AM EDT | Severe Thunderstorm Warning | LWX | Charles | 39 min |
| Jun 9, 2:28 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 47 min |
| Jun 9, 2:52 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 38 min |
| Jun 9, 3:09 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 51 min |
| Jun 9, 4:39 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 39 min |
| Jun 9, 5:01 PM EDT | Flash Flood Warning | LWX | Baltimore, City of Baltimore | 119 min |
| Jun 9, 5:13 PM EDT | Flash Flood Warning | LWX | Harford | 2 hr |
| Jun 9, 5:18 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, Howard, City of Baltimore | 57 min |
Nearby
Severe Thunderstorm Warnings in West Virginia, 2009Severe Thunderstorm Warnings in Virginia, 2009Severe Thunderstorm Warnings in Maryland, 2009Every severe thunderstorm warning in 2009
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.