Alert archive / Maryland / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 232, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Aug 5, 2007, 3:56 PM EDT for Saint Mary's County, Maryland. It was in force for 54 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
- Aug 5, 2007, 3:56 PM EDT (19:56 UTC)
- Expired
- Aug 5, 2007, 4:50 PM EDT
- In force
- 54 min
- Issued by
- NWS Baltimore/Washington
- Area
- Counties, with a storm outline in the text
County Saint Mary's County, MD
The radar
The Dover AFB radar (KDOX), 116 km from the middle of the area, began a volume at 20:00 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.9 hours before the alert went out and 104 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
- 2196 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 1142 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.6
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 Aug 5, 3:12 PM EDT, 44 minutes earlier.
Area forecast discussion, Aug 5, 3:12 PM EDT, 44 minutes before
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</html>Hazardous weather outlook, Aug 5, 2:55 PM EDT, 1 hour 1 minute before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 255 PM EDT SUN AUG 5 2007 ANZ530>537-DCZ001-MDZ003>007-009>011-013-014-016>018-501-502- VAZ021-025>031-036>042-050>057-WVZ050>055-501>504-061000- 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-WASHINGTON-FREDERICK MD-CARROLL- NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE- PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT- 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-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX- ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA- KING GEORGE-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-PENDLETON-HARDY- WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL- 255 PM EDT SUN AUG 5 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MARYLAND WEST OF THE EASTERN SHORE INCLUDING THE CHESAPEAKE BAY AND EAST OF GARRETT COUNTY...EASTERN WEST VIRGINIA...NORTHERN AND CENTRAL VIRGINIA... WASHINGTON DC AND THE TIDAL POTOMAC RIVER. .DAY ONE...LATE THIS AFTERNOON AND TONIGHT SCATTERED TO NUMEROUS THUNDERSTORMS WILL DEVELOP LATE THIS AFTERNOON AND EVENING ACROSS THE OUTLOOK AREA. SOME OF THE STORMS WILL PRODUCE HEAVY RAINFALL. IN ADDITION...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN AN AREA EAST OF FREDERICKSBURG AND SOUTH OF ANNAPOLIS...INCLUDING LOWER SOUTHERN MARYLAND THE THE ADJACENT WATERS OF THE TIDAL POTOMAC RIVER AND CHESAPEAKE BAY. THE MOST LIKELY RISK IS LOCALLY DAMAGING WINDS BETWEEN 4 PM AND 9 PM. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SUNDAY FROM MONDAY THROUGH WEDNESDAY...HEAT INDEX VALUES ARE EXPECTED TO BE NEAR 100 DEGREES EACH DAY. TUESDAY IN PARTICULAR LOOKS TO BE THE HOTTEST OF THOSE THREE DAYS...WITH HEAT INDICES RANGING FROM 100 TO 105 DEGREES ACROSS THE REGION. SCATTERED THUNDERSTORMS ARE EXPECTED MONDAY. ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE DURING THE AFTERNOON AND EVENING...PRIMARILY IN AREAS INCLUDING AND NORTHEAST OF BALTIMORE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS EVENING. ROGOWSKI/LEE
In the hours before
Special weather statement, Aug 5, 1:57 PM EDT, 1 hour 59 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 157 PM EDT SUN AUG 5 2007 DCZ001-MDZ013-014-016>018-VAZ054>057-060000- DISTRICT OF COLUMBIA-PRINCE GEORGES-ANNE ARUNDEL-CHARLES- ST. MARYS-CALVERT-ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD- SPOTSYLVANIA-KING GEORGE- INCLUDING THE CITIES OF...WASHINGTON...ANNAPOLIS...WALDORF... ST MARYS CITY...ALEXANDRIA...FALLS CHURCH...FREDERICKSBURG 157 PM EDT SUN AUG 5 2007 ...SEVERE THUNDERSTORMS POSSIBLE LATE THIS AFTERNOON AND EVENING... SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP LATE THIS AFTERNOON AND EVENING IN AN AREA INCLUDING AND SOUTHEAST OF A LINE FROM FREDERICKSBURG VIRGINIA...TO WASHINGTON DC...TO THE CHESAPEAKE BAY BRIDGE. THIS AREA INCLUDES THE SOUTHEAST GREATER WASHINGTON METROPOLITAN AREA...SOUTHERN MARYLAND...THE LOWER TIDAL POTOMAC RIVER SOUTH OF THE ROUTE 301 BRIDGE...AND THE CHESAPEAKE BAY FROM SANDY POINT MARYLAND TO SMITH POINT VIRGINIA. THERE IS SUFFICIENT MOISTURE AND SPIN IN THE ATMOSPHERE TO ALLOW THESE THUNDERSTORMS TO BECOME STRONG TO SEVERE...WITH THE PRIMARY RISK OF LOCALLY DAMAGING WIND GUSTS. THOSE PEOPLE WITH OUTDOOR ACTIVITIES SHOULD KEEP AN EYE TO THE SKY AND MOVE INDOORS SHOULD THREATENING WEATHER APPROACH. BOATERS SHOULD BE PARTICULARLY ALERT TO SEEK SAFE HARBOR BEFORE THREATENING WEATHER OCCURS. ROGOWSKI/LEE
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 3:19 PM EDT | Special Marine Warning | LWX | 116 min | |
| Aug 5, 3:52 PM EDT | Special Marine Warning | LWX | 113 min | |
| Aug 5, 4:56 PM EDT | Special Marine Warning | LWX | 49 min | |
| Aug 5, 6:10 PM EDT | Special Marine Warning | LWX | 95 min | |
| Aug 5, 6:45 PM EDT | Special Marine Warning | LWX | 90 min | |
| Aug 5, 7:07 PM EDT | Special Marine Warning | LWX | 113 min | |
| Aug 5, 7:57 PM EDT | Special Marine Warning | LWX | 66 min | |
| Aug 5, 3:30 PM EDT | Tornado Warning | LWX | Saint Mary's | 30 min |
| Aug 5, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | Calvert | 33 min |
| Aug 5, 4:55 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 65 min |
| Aug 5, 6:06 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 25 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2007Every severe thunderstorm warning in 2007
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.