Alert archive / Maryland / Tornado Warnings in 2010
Tornado Warning 12, NWS Baltimore/Washington
NWS Baltimore/Washington issued this tornado warning at Jul 25, 2010, 3:18 PM EDT for Howard County, Montgomery County, Maryland. It was in force for 27 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 25, 2010, 3:18 PM EDT (19:18 UTC)
- Expired
- Jul 25, 2010, 3:45 PM EDT
- In force
- 27 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
Counties Howard County, MD, Montgomery County, MD
The radar
The Sterling radar (KLWX), 44 km from the middle of the area, began a volume at 19:19 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 |
|---|---|---|---|
| Jul 25, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.3 hours before the alert went out and 39 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
- 607 J/kg
- Mixed-layer CIN
- -173 J/kg
- Mixed-layer LCL
- 1349 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Jul 25, 3:04 PM EDT, 14 minutes earlier.
Area forecast discussion, Jul 25, 3:04 PM EDT, 14 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 159 PM EDT SUN JUL 25 2010 ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 261000- 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- 159 PM EDT SUN JUL 25 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...THIS AFTERNOON AND TONIGHT A HEAT ADVISORY IS IN EFFECT UNTIL 8 PM. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 7PM ACROSS METRO BALTIMORE...AND UNTIL 8PM FOR THE REST OF THE AREA. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP THIS AFTERNOON ALONG AND AHEAD OF AN APPROACHING FRONTAL BOUNDARY. THUNDERSTORMS WILL HAVE THE POTENTIAL TO BECOME SEVERE...PRODUCING DAMAGING WIND GUSTS. A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE TIDAL POTOMAC AND MARYLAND CHESAPEAKE BAY THIS AFTERNOON AND EVENING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... THE SKYWARN SPOTTER NETWORK HAS BEEN ACTIVATED THIS AFTERNOON. PLEASE FORWARD ANY STORM REPORTS TO THE NATIONAL WEATHER SERVICE. MDZ003>005-009-010-501-502-VAZ021-025>031-036>040-042-050-051-501- 502-WVZ050>055-501>504-261000- 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-LOUDOUN-ORANGE- CULPEPER-NORTHERN FAUQUIER-SOUTHERN FAUQUIER-HAMPSHIRE-MORGAN- BERKELEY-JEFFERSON-PENDLETON-HARDY-WESTERN GRANT-EASTERN GRANT- WESTERN MINERAL-EASTERN MINERAL- 159 PM EDT SUN JUL 25 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...THIS AFTERNOON AND TONIGHT A HEAT ADVISORY IS IN EFFECT UNTIL 8 PM FOR AREAS EAST OF THE BLUE RIDGE MOUNTAINS...PORTIONS OF THE EASTERN WEST VIRGINIA PANHANDLE...CENTRAL MARYLAND AND THE NORTHERN SHENANDOAH VALLEY. SEEN WBCNPWLWX FOR FURTHER DETAILS. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 7PM ACROSS NORTHERN MARYLAND... THE POTOMAC HIGHLANDS OF WEST VIRGINIA...AND THE NORTHERN SHENANDOAH VALLEY OF VIRGINIA...AND UNTIL 8PM FOR THE REST OF THE AREA. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP THIS AFTERNOON ALONG AND AHEAD OF AN APPROACHING FRONTAL BOUNDARY. THUNDERSTORMS WILL HAVE THE POTENTIAL TO BECOME SEVERE...PRODUCING DAMAGING WIND GUSTS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... THE SKYWARN SPOTTER NETWORK HAS BEEN ACTIVATED THIS AFTERNOON. PLEASE FORWARD ANY STORM REPORTS TO THE NATIONAL WEATHER SERVICE. HTS
In the hours before
Local storm report, Jul 25, 2:51 PM EDT, 27 minutes before
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</html>Local storm report, Jul 25, 3:03 PM EDT, 15 minutes before
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</html>Local storm report, Jul 25, 3:15 PM EDT, 3 minutes before
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</html>Local storm report, Jul 25, 3:18 PM EDT, 0 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 25, 3:10 AM EDT | Small Craft Advisory | LWX | 30 hr | |
| Jul 25, 1:50 PM EDT | Special Weather Statement | LWX | Frederick, City of Winchester | 25 min |
| Jul 25, 2:01 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Frederick, Shenandoah, Warren, City of Winchester | 44 min |
| Jul 25, 2:30 PM EDT | Special Marine Warning | LWX | 60 min | |
| Jul 25, 2:36 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Fauquier, Loudoun, Prince William, Warren | 54 min |
| Jul 25, 2:41 PM EDT | Special Marine Warning | LWX | 2 hr | |
| Jul 25, 2:46 PM EDT | Special Marine Warning | LWX | 119 min | |
| Jul 25, 2:53 PM EDT | Special Weather Statement | LWX | Page, Rappahannock, Rockingham, Shenandoah, Warren | 37 min |
| Jul 25, 3:07 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, Fauquier, Loudoun, Prince William, City of Alexandria and 4 more | 38 min |
| Jul 25, 3:24 PM EDT | Special Marine Warning | LWX | 2 hr | |
| Jul 25, 3:42 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, Prince William, City of Alexandria, City of Fairfax, City of Falls Church and 1 more | 63 min |
| Jul 25, 3:49 PM EDT | Special Marine Warning | LWX | 116 min | |
| Jul 25, 4:17 PM EDT | Special Marine Warning | LWX | 118 min | |
| Jul 25, 4:17 PM EDT | Severe Thunderstorm Warning | LWX | King George, Prince William, Stafford | 58 min |
| Jul 25, 4:32 PM EDT | Special Weather Statement | LWX | Orange, Spotsylvania, City of Fredericksburg | 28 min |
| Jul 25, 6:19 PM EDT | Special Marine Warning | LWX | 56 min | |
| Jul 25, 12:43 PM EDT | Special Weather Statement | LWX | Allegany | 62 min |
| Jul 25, 12:54 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 66 min |
| Jul 25, 2:29 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Harford, Howard, City of Baltimore | 61 min |
| Jul 25, 5:19 PM EDT | Special Weather Statement | LWX | Saint Mary's | 26 min |
Nearby
Tornado Warnings in Maryland, 2010Every tornado warning in 2010Tornadoes 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.