Alert archive / Maryland / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 9, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Feb 11, 2009, 10:07 PM EST for 4 counties in Virginia; 8 counties in Maryland. It was in force for 49 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
- Feb 11, 2009, 10:07 PM EST (03:07 UTC)
- Expired
- Feb 11, 2009, 10:56 PM EST
- In force
- 49 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
Counties Anne Arundel County, MD, Baltimore County, MD, Carroll County, MD, City of Baltimore, MD, Harford County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Arlington County, VA, City of Alexandria, VA, City of Falls Church, VA, Fairfax County, VA
The radar
The Sterling radar (KLWX), 54 km from the middle of the area, began a volume at 03:09 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 |
|---|---|---|---|
| Feb 11, 8:19 PM EST | Severe Thunderstorm Watch | SPC | 3 hr |
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 Feb 11, 10:02 PM EST, 5 minutes earlier.
Area forecast discussion, Feb 11, 10:02 PM EST, 5 minutes before
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</html>Hazardous weather outlook, Feb 11, 6:57 PM EST, 3 hours 10 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 657 PM EST WED FEB 11 2009 ANZ530>537-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 121000- 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- 657 PM EST WED FEB 11 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...TONIGHT A SMALL CRAFT ADVISORY IS IN EFFECT THROUGH 10 PM THIS EVENING FOR THE TIDAL POTOMAC RIVER AND MARYLAND CHESAPEAKE BAY. AFTER 10 PM...A GALE WARNING IS IN EFFECT OVERNIGHT ACROSS THE MARINE WATERS. A COLD FRONT WILL MOVE ACROSS THE OUTLOOK AREA TONIGHT. SHOWERS AND ISOLATED THUNDERSTORMS WILL ACCOMPANY THE FRONT...MOST LIKELY BETWEEN 10 PM AND 2 AM. THIS ACTIVITY WILL HAVE THE POTENTIAL TO PRODUCE STRONG GUSTY WINDS. A WIND ADVISORY HAS BEEN ISSUED STARTING AT 2 AM FOR STRONG GUSTY WINDS BEHIND THE FRONTAL PASSAGE. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THE WIND ADVISORY WILL CONTINUE THROUGH MIDNIGHT THURSDAY NIGHT. IN ADDITION...DUE TO LOW RELATIVE HUMIDITIES AND GUSTY WINDS A FIRE WEATHER WATCH HAS BEEN ISSUED FOR THURSDAY FOR MOST OF THE AREA. A GALE WARNING CONTINUES ACROSS THE WATERS THROUGH THURSDAY EVENING. A DISTURBANCE WILL TRACK ACROSS THE REGION THIS WEEKEND...BRINGING THE POTENTIAL FOR WINTRY PRECIPITATION TO THE AREA ON SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTERS HAVE BEEN ACTIVATED. REPORTS OF WIND GUSTS OR WIND DAMAGE WOULD BE GREATLY APPRECIATED. MDZ003>005-009-010-501-502-VAZ021-025>031-036>042-050-051- WVZ050>055-501>504-121000- 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- 657 PM EST WED FEB 11 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...TONIGHT A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR THE POTOMAC HIGHLANDS...SHENANDOAH VALLEY...AND THE CENTRAL FOOTHILLS OF VIRGINIA UNTIL 10 PM. ANY THUNDERSTORMS THAT BECOME SEVERE WILL HAVE THE POTENTIAL TO PRODUCE DAMAGING WIND GUSTS. A COLD FRONT WILL MOVE ACROSS THE OUTLOOK AREA EARLY TONIGHT. SHOWERS AND ISOLATED THUNDERSTORMS WILL ACCOMPANY THE FRONT...MOST LIKELY BETWEEN 8 PM AND 1 AM. THIS ACTIVITY WILL HAVE THE POTENTIAL TO PRODUCE STRONG GUSTY WINDS...A FEW OF WHICH COULD REACH SEVERE LEVELS UP TO 60 MPH. A HIGH WIND WARNING HAS BEEN ISSUED FOR STRONG GUSTY WINDS UP TO 60 MPH BEHIND THE FRONTAL PASSAGE STARTING LATER THIS EVENING. THE WARNING IS IN EFFECT FOR AREAS WEST OF THE BLUE RIDGE IN VIRGINIA...AS WELL AS LOUDOUN COUNTY...THE EASTERN PANHANDLE OF WEST VIRGINIA...AND WESTERN MARYLAND INCLUDING FREDERICK COUNTY. A WIND ADVISORY IS IN EFFECT FOR AREAS EAST OF THIS FOR WINDS GUSTING UP TO 50 MPH. A WINTER WEATHER ADVISORY HAS BEEN ISSUED FOR THE FAVORED UPSLOPE AREAS OF THE ALLEGHENY AND POTOMAC HIGHLANDS STARTING AT 4 AM. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THE HIGH WARNING AND WIND ADVISORY WILL CONTINUE THROUGH MIDNIGHT THURSDAY NIGHT. IN ADDITION...DUE TO LOW RELATIVE HUMIDITIES AND GUSTY WINDS A FIRE WEATHER WATCH HAS BEEN ISSUED FOR THURSDAY FOR MUCH OF THE AREA. THE WINTER WEATHER ADVISORY WILL CONTINUE THROUGH 4 PM FOR THE FAVORED UPSLOPE AREAS OF THE ALLEGHENY AND POTOMAC HIGHLANDS. A DISTURBANCE WILL TRACK ACROSS THE REGION THIS WEEKEND...BRINGING THE POTENTIAL FOR WINTRY PRECIPITATION TO THE AREA ON SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTERS HAVE BEEN ACTIVATED. REPORTS OF SNOW...WIND GUSTS...OR WIND DAMAGE WOULD BE GREATLY APPRECIATED.
In the hours before
Local storm report, Feb 11, 8:53 PM EST, 1 hour 14 minutes before
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</html>Local storm report, Feb 11, 9:06 PM EST, 1 hour 1 minute before
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</html>Special weather statement, Feb 11, 9:10 PM EST, 57 minutes before
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</html>Local storm report, Feb 11, 9:23 PM EST, 44 minutes before
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</html>Local storm report, Feb 11, 9:27 PM EST, 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
927 PM EST WED FEB 11 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0915 PM TSTM WND GST STANARDSVILLE 38.30N 78.44W
02/11/2009 M60.00 MPH GREENE VA TRAINED SPOTTER
&&
LEELocal storm report, Feb 11, 9:39 PM EST, 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
939 PM EST WED FEB 11 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0925 PM TSTM WND DMG BOYCE 39.09N 78.06W
02/11/2009 CLARKE VA TRAINED SPOTTER
TREES DOWN ON POWER LINES.
&&
LEEThe office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 11, 7:22 PM EST | Severe Thunderstorm Warning | LWX | Augusta, Highland, Rockingham | 53 min |
| Feb 11, 8:10 PM EST | Severe Thunderstorm Warning | LWX | Albemarle, Augusta, Greene, Nelson, Rockingham, City of Charlottesville and 3 more | 65 min |
| Feb 11, 8:17 PM EST | Severe Thunderstorm Warning | LWX | Augusta, Frederick, Highland, Rockingham, Shenandoah, City of Winchester | 58 min |
| Feb 11, 8:35 PM EST | Severe Thunderstorm Warning | LWX | Frederick | 70 min |
| Feb 11, 8:54 PM EST | Severe Thunderstorm Warning | LWX | Clarke, Frederick, Greene, Madison, Page, Rappahannock and 2 more | 51 min |
| Feb 11, 9:19 PM EST | Severe Thunderstorm Warning | LWX | Albemarle, Clarke, Culpeper, Fauquier, Greene, Loudoun and 4 more | 36 min |
| Feb 11, 9:33 PM EST | Severe Thunderstorm Warning | LWX | Fairfax, Fauquier, Loudoun, Prince William, Spotsylvania, Stafford and 4 more | 43 min |
| Feb 11, 9:37 PM EST | Special Marine Warning | LWX | 61 min | |
| Feb 11, 9:51 PM EST | Special Marine Warning | LWX | 39 min | |
| Feb 11, 10:14 PM EST | Special Marine Warning | LWX | 44 min | |
| Feb 12, 4:08 AM EST | Storm Warning | LWX | 12 hr | |
| Feb 12, 6:49 AM EST | Red Flag Warning | LWX | Albemarle, Arlington, Augusta, Clarke, Culpeper, Fairfax and 19 more | 14 hr |
| Feb 11, 7:31 PM EST | Severe Thunderstorm Warning | LWX | Allegany | 74 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2009Severe Thunderstorm Warnings in Virginia, 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; radar from the NEXRAD Level II archive.