Alert archive / Virginia / Flash Flood Warnings in 2010
Flash Flood Warning 63, NWS Baltimore/Washington
NWS Baltimore/Washington issued this flash flood warning at Dec 1, 2010, 4:29 AM EST for 9 counties in Virginia; Washington County, Maryland; Berkeley County, Jefferson County, Morgan County, West Virginia. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 1, 2010, 4:29 AM EST (09:29 UTC)
- Expired
- Dec 1, 2010, 10:30 AM EST
- In force
- 6 hr
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Flood severity
- None
Counties Washington County, MD, City of Harrisonburg, VA, City of Winchester, VA, Clarke County, VA, Frederick County, VA, Greene County, VA, Page County, VA, Rockingham County, VA, Shenandoah County, VA, Warren County, VA, Berkeley County, WV, Jefferson County, WV, Morgan County, WV
The radar
The Sterling radar (KLWX), 70 km from the middle of the area, began a volume at 09:29 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 00:00Z, 9.5 hours before the alert went out and 78 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 671 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 416 m²/s²
- 0-3 km storm-relative helicity
- 505 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Dec 1, 3:52 AM EST, 37 minutes earlier.
Area forecast discussion, Dec 1, 3:52 AM EST, 37 minutes before
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</html>Hazardous weather outlook, Dec 1, 4:03 AM EST, 26 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 403 AM EST WED DEC 1 2010 ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 021000- 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-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- 403 AM EST WED DEC 1 2010 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...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF THE OUTLOOK AREA. SOME STORMS WILL BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS AND ISOLATED TORNADOES EARLY THIS MORNING. A TORNADO WATCH HAS BEEN ISSUED FOR THE AREA UNTIL 10 AM EST. PLEASE REFER TO THE LATEST HAZARD MESSAGE /WCNLWX/ FOR DETAILS. A FLASH FLOOD WATCH IS IN EFFECT THROUGH 100 PM EST FOR PORTIONS OF THE OUTLOOK AREA. PLEASE REFER TO THE LATEST HAZARD MESSAGE /FFALWX/ FOR DETAILS. A COASTAL FLOOD ADVISORY IS IN EFFECT ALONG THE WESTERN SHORE OF THE MARYLAND CHESAPEAKE BAY AND FOR THE DISTRICT OF COLUMBIA AND ARLINGTON COUNTY. PLEASE REFER TO THE LATEST HAZARD MESSAGE /CFWLWX/ FOR DETAILS. A WIND ADVISORY IS IN EFFECT THIS MORNING. PLEASE REFER TO THE LATEST HAZARD MESSAGE /NPWLWX/ FOR DETAILS. A GALE WARNING IS IN EFFECT THIS MORNING FOR THE CHESAPEAKE BAY AND TIDAL POTOMAC RIVER. A SMALL CRAFT ADVISORY WILL BE NEEDED FOR PORTIONS OF THE WATERS THIS AFTERNOON AND TONIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A SMALL CRAFT ADVISORY LIKELY WILL BE NEEDED THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE NEEDED THIS MORNING. MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504- WVZ050>053-055-501>506-021000- WASHINGTON-FREDERICK MD-CARROLL-MONTGOMERY-HOWARD- EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-AUGUSTA- ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-NELSON- ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER- NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN HIGHLAND- EASTERN HIGHLAND-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-HARDY- WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL- WESTERN PENDLETON-EASTERN PENDLETON- 403 AM EST WED DEC 1 2010 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...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PORTIONS OF THE OUTLOOK AREA. SOME STORMS WILL BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS AND ISOLATED TORNADOES THIS MORNING. A TORNADO WATCH IS IN EFFECT FOR AREAS ALONG AND EAST OF THE BLUE RIDGE UNTIL 10 AM EST. PLEASE REFER TO THE LATEST HAZARD MESSAGE /WCNLWX/ FOR DETAILS. A HIGH WIND WARNING HAS BEEN ISSUED FOR THE BLUE RIDGE OF VIRGINIA THIS MORNING. A WIND ADVISORY IS IN EFFECT FOR PORTIONS OF THE AREA. PLEASE REFER TO THE LATEST HAZARD MESSAGE /NPWLWX/ FOR DETAILS. A FLASH FLOOD WATCH IS IN EFFECT THIS MORNING FOR THE OUTLOOK AREA. PLEASE REFER TO THE LATEST HAZARD MESSAGE /FFALWX/ FOR DETAILS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE NEEDED THIS MORNING. SBK
In the hours before
Local storm report, Dec 1, 3:09 AM EST, 1 hour 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
309 AM EST WED DEC 01 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0134 AM NON-TSTM WND GST 2 SSE MOUNT TORRY FURNA 37.92N 78.95W
12/01/2010 M62 MPH NELSON VA MESONET
WNTRE
&&
EVENT NUMBER LWX1001092
KRAMARLocal storm report, Dec 1, 3:11 AM EST, 1 hour 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
311 AM EST WED DEC 01 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1200 AM NON-TSTM WND GST 2 SSE MOUNT TORRY FURNA 37.92N 78.95W
12/01/2010 M59 MPH NELSON VA MESONET
WNTRE
&&
EVENT NUMBER LWX1001093
KRAMARThe office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 1, 2:05 AM EST | Flash Flood Warning | LWX | Highland | 8 hr |
| Dec 1, 2:43 AM EST | Flash Flood Warning | LWX | Albemarle, Augusta, Nelson, City of Charlottesville, City of Staunton, City of Waynesboro | 6 hr |
| Dec 1, 2:55 AM EST | Severe Thunderstorm Warning | LWX | Albemarle, Augusta, Nelson, City of Charlottesville | 65 min |
| Dec 1, 3:06 AM EST | High Wind Warning | LWX | Greene, Madison, Nelson, Page, Rappahannock, Rockingham and 4 more | 3 hr |
| Dec 1, 3:21 AM EST | Tornado Warning | LWX | Albemarle, Nelson, City of Charlottesville | 24 min |
| Dec 1, 3:28 AM EST | Severe Thunderstorm Warning | LWX | Albemarle, Augusta, Culpeper, Greene, Madison, Orange and 3 more | 47 min |
| Dec 1, 4:06 AM EST | Severe Thunderstorm Warning | LWX | Albemarle, Culpeper, Greene, Madison, Orange, Rappahannock and 1 more | 54 min |
| Dec 1, 4:34 AM EST | Flash Flood Warning | LWX | Culpeper, Fauquier, Greene, Madison, Orange, Rappahannock | 6 hr |
| Dec 1, 4:58 AM EST | Severe Thunderstorm Warning | LWX | Culpeper, Fairfax, Fauquier, Loudoun, Orange, Prince William and 6 more | 47 min |
| Dec 1, 5:44 AM EST | Severe Thunderstorm Warning | LWX | Fairfax, Fauquier, Loudoun, Prince William, City of Manassas, City of Manassas Park | 26 min |
| Dec 1, 6:01 AM EST | Special Weather Statement | LWX | Arlington, Fairfax, Loudoun, Prince William, City of Alexandria, City of Fairfax and 3 more | 119 min |
| Dec 1, 7:25 AM EST | Severe Thunderstorm Warning | LWX | Clarke, Loudoun | 35 min |
| Dec 1, 9:37 AM EST | Special Weather Statement | LWX | Arlington, City of Alexandria, City of Falls Church | 23 min |
| Dec 1, 10:02 AM EST | Areal Flood Warning | LWX | Frederick, Rockingham, Shenandoah | 3 hr |
| Dec 1, 11:16 AM EST | Gale Warning | LWX | 3 hr | |
| Dec 1, 11:16 AM EST | Small Craft Advisory | LWX | 30 hr | |
| Dec 1, 4:18 AM EST | Flash Flood Warning | LWX | Allegany, Washington | 6 hr |
| Dec 1, 4:22 AM EST | Severe Thunderstorm Warning | LWX | Allegany, Washington | 22 min |
| Dec 1, 5:25 AM EST | Coastal Flood Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 9 hr |
| Dec 1, 6:20 AM EST | Special Weather Statement | LWX | Harford | 10 min |
| Dec 1, 6:37 AM EST | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 53 min |
| Dec 1, 8:03 AM EST | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Howard, Montgomery | 42 min |
| Dec 1, 9:00 AM EST | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Harford, Howard, City of Baltimore | 75 min |
| Dec 1, 9:28 AM EST | Tornado Warning | LWX | Charles, Prince George's | 17 min |
| Dec 1, 9:43 AM EST | Special Weather Statement | LWX | Anne Arundel, Calvert, Prince George's, Saint Mary's | 62 min |
| Dec 1, 2:37 PM EST | River Flood Warning | LWX | Washington | 26 hr |
Nearby
Flash Flood Warnings in Virginia, 2010Flash Flood Warnings in West Virginia, 2010Flash Flood Warnings in Maryland, 2010Every flash flood warning in 2010
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.