Alert archive / Maryland / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 222, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 19, 2012, 11:16 PM EDT for Anne Arundel County, Calvert County, Prince George's County, Maryland. It was in force for 29 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
- Jul 19, 2012, 11:16 PM EDT (03:16 UTC)
- Expired
- Jul 19, 2012, 11:45 PM EDT
- In force
- 29 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
Counties Anne Arundel County, MD, Calvert County, MD, Prince George's County, MD
The radar
The Sterling radar (KLWX), 76 km from the middle of the area, began a volume at 03:17 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, 3.3 hours before the alert went out and 68 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
- 525 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 1690 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 47 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 Jul 19, 10:29 PM EDT, 47 minutes earlier.
Area forecast discussion, Jul 19, 10:29 PM EDT, 47 minutes before
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</html>Hazardous weather outlook, Jul 19, 7:34 PM EDT, 3 hours 42 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 734 PM EDT THU JUL 19 2012 ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 200945- 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- 734 PM EDT THU JUL 19 2012 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 THUNDERSTORMS ARE EXPECTED THIS EVENING. A FEW OF THE STORMS MAY BE SEVERE...PRODUCING DAMAGING WIND GUSTS. LOCALLY HEAVY RAINFALL COULD ALSO LEAD TO FLASH FLOODING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE FRIDAY AFTERNOON AND EVENING. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION COULD BECOME NECESSARY THIS EVENING. LIMITED ACTIVATION IS ALSO POSSIBLE ON FRIDAY. MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504- WVZ050>053-055-501>506-200945- 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- 734 PM EDT THU JUL 19 2012 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 THUNDERSTORMS ARE EXPECTED THIS EVENING. A FEW OF THE STORMS MAY BE SEVERE...PRODUCING DAMAGING WIND GUSTS. LOCALLY HEAVY RAINFALL COULD ALSO LEAD TO FLASH FLOODING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE FRIDAY AFTERNOON AND EVENING. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION COULD BECOME NECESSARY THIS EVENING. LIMITED ACTIVATION IS ALSO POSSIBLE ON FRIDAY.
In the hours before
Local storm report, Jul 19, 10:16 PM EDT, 1 hour before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1016 PM EDT THU JUL 19 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1012 PM FLOOD 1 NE WESTMINSTER 39.59N 77.00W
07/19/2012 CARROLL MD PUBLIC
WATER ESTIMATED 1 TO 2 FEET DEEP IN SPOTS COVERING EAST
BOUND LANE ON MD RT 140 AT MD RT 97.
&&
EVENT NUMBER LWX1200950
KLWLocal storm report, Jul 19, 10:17 PM EDT, 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1017 PM EDT THU JUL 19 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0720 PM FLASH FLOOD 1 N FELLS POINT 39.29N 76.58W
07/19/2012 BALTIMORE CITY MD BROADCAST MEDIA
2 FEET OF WATER FLOWING DOWN NORTH KENWOOD AVE
&&
EVENT NUMBER LWX1200951
WOODY!Special weather statement, Jul 19, 10:20 PM EDT, 56 minutes before
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</html>Local storm report, Jul 19, 10:37 PM EDT, 39 minutes before
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</html>Special weather statement, Jul 19, 10:45 PM EDT, 31 minutes before
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</html>Local storm report, Jul 19, 11:08 PM EDT, 8 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 |
|---|---|---|---|---|
| Jul 19, 8:43 PM EDT | Special Weather Statement | LWX | Loudoun | 47 min |
| Jul 19, 9:07 PM EDT | Special Marine Warning | LWX | 83 min | |
| Jul 19, 9:16 PM EDT | Special Marine Warning | LWX | 38 min | |
| Jul 19, 9:28 PM EDT | Special Weather Statement | LWX | Arlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church, City of Manassas and 1 more | 47 min |
| Jul 19, 9:34 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, Prince William, City of Alexandria, City of Fairfax, City of Falls Church and 1 more | 41 min |
| Jul 19, 9:58 PM EDT | Special Marine Warning | LWX | 92 min | |
| Jul 19, 10:20 PM EDT | Special Weather Statement | LWX | City of Alexandria | 25 min |
| Jul 19, 10:24 PM EDT | Flash Flood Warning | LWX | Arlington, City of Alexandria | 3 hr |
| Jul 19, 10:26 PM EDT | Special Marine Warning | LWX | 25 min | |
| Jul 19, 10:31 PM EDT | Special Marine Warning | LWX | 82 min | |
| Jul 19, 10:36 PM EDT | Special Marine Warning | LWX | 114 min | |
| Jul 19, 11:04 PM EDT | Special Marine Warning | LWX | 86 min | |
| Jul 19, 11:07 PM EDT | Special Marine Warning | LWX | 78 min | |
| Jul 20, 4:26 AM EDT | Flash Flood Watch | LWX | Arlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 22 more | 17 hr |
| Jul 20, 7:11 PM EDT | Special Weather Statement | LWX | City of Manassas Park | 49 min |
| Jul 20, 7:44 PM EDT | Flash Flood Warning | LWX | Fairfax, Fauquier, Loudoun, Prince William | 85 min |
| Jul 19, 9:20 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Howard, Montgomery, Prince George's | 40 min |
| Jul 19, 9:49 PM EDT | Special Weather Statement | LWX | Howard | 26 min |
| Jul 19, 10:01 PM EDT | Special Weather Statement | LWX | Howard | 29 min |
| Jul 19, 10:06 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 3 hr |
| Jul 19, 10:17 PM EDT | Flash Flood Warning | LWX | Baltimore, Carroll | 3 hr |
| Jul 19, 10:45 PM EDT | Special Weather Statement | LWX | Anne Arundel, Prince George's | 45 min |
| Jul 20, 1:06 AM EDT | Special Weather Statement | LWX | City of Baltimore | 24 min |
| Jul 20, 3:36 PM EDT | Special Weather Statement | LWX | Allegany | 39 min |
| Jul 20, 6:19 PM EDT | Special Weather Statement | LWX | Grant, Hardy | 41 min |
| Jul 20, 6:59 PM EDT | Special Weather Statement | LWX | Hardy | 46 min |
| Jul 20, 7:03 PM EDT | Flash Flood Warning | LWX | Grant, Hardy, Pendleton | 115 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2012Every severe thunderstorm warning in 2012
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.