Alert archive / Maryland / Tornado Warnings in 2009
Tornado Warning 5, NWS Baltimore/Washington
NWS Baltimore/Washington issued this tornado warning at Jun 20, 2009, 3:46 PM EDT for Baltimore County, Harford 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
- Jun 20, 2009, 3:46 PM EDT (19:46 UTC)
- Expired
- Jun 20, 2009, 4:15 PM EDT
- In force
- 29 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
Counties Baltimore County, MD, Harford County, MD
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 20, 3:05 PM EDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.8 hours before the alert went out and 101 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
- 1441 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 978 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.2
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 Jun 20, 3:27 PM EDT, 19 minutes earlier.
Area forecast discussion, Jun 20, 3:27 PM EDT, 19 minutes before
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</html>Hazardous weather outlook, Jun 20, 11:45 AM EDT, 4 hours 1 minute before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1145 AM EDT SAT JUN 20 2009 ANZ530>537-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 211000- 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- 1145 AM EDT SAT JUN 20 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...THIS AFTERNOON AND TONIGHT NUMEROUS THUNDERSTORMS WILL MOVE ACROSS THE OUTLOOK AREA THROUGH THIS AFTERNOON. SOME THUNDERSTORMS MAY BE SEVERE...PRODUCING DAMAGING WIND GUSTS AND LARGE HAIL. HEAVY RAINFALL IS ALSO POSSIBLE...WHICH COULD PRODUCE LOCALIZED FLASH FLOODING. THE MOST LIKELY TIME FOR SEVERE WEATHER IS THROUGH 4 PM. A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE TIDAL POTOMAC RIVER AND MARYLAND CHESAPEAKE BAY 2 PM THIS AFTERNOON INTO TONIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A SMALL CRAFT ADVISORY CONTINUES ACROSS THE WATERS SUNDAY AND SUNDAY EVENING. THE SMALL CRAFT ADVISORY MAY NEED TO BE EXTENDED INTO SUNDAY NIGHT AND MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON. MDZ003>005-009-010-501-502-VAZ021-025>031-036>042-050-051- WVZ050>055-501>504-211000- 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- 1145 AM EDT SAT JUN 20 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...THIS AFTERNOON AND TONIGHT NUMEROUS THUNDERSTORMS WILL MOVE ACROSS THE OUTLOOK AREA THROUGH THIS AFTERNOON. SOME THUNDERSTORMS MAY BE SEVERE...PRODUCING DAMAGING WIND GUSTS AND LARGE HAIL. HEAVY RAINFALL IS ALSO POSSIBLE...WHICH COULD PRODUCE LOCALIZED FLASH FLOODING. THE MOST LIKELY TIME FOR SEVERE WEATHER IS THROUGH 3 PM. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON.
In the hours before
Special weather statement, Jun 20, 11:04 AM EDT, 4 hours 42 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1104 AM EDT SAT JUN 20 2009 DCZ001-MDZ009-VAZ042-053-054-201545- DISTRICT OF COLUMBIA DC-MONTGOMERY MD-LOUDOUN VA- ARLINGTON/FALLS CHURCH/ALEXANDRIA VA-FAIRFAX VA- 1104 AM EDT SAT JUN 20 2009 ...STRONG THUNDERSTORMS TO AFFECT THE DISTRICT OF COLUMBIA AND THE NORTHWEST SUBURBS... AT 11 AM EDT...A STRONG THUNDERSTORM WAS OVER WOLF TRAP AND GREAT FALLS...MOVING RAPIDLY EAST AT 50 MPH. AT THE SAME TIME ANOTHER STRONG STORM WAS OVER WESTERN MONTGOMERY COUNTY MOVING EAST. LOCATIONS THAT WILL LIKELY BE AFFECTED BY THESE STRONG STORMS INCLUDE BETHESDA...CHEVY CHASE...AMERICAN UNIVERSITY... GEORGETOWN... WASHINGTON... ROCKVILLE...OLNEY...AND NORTH ARLINGTON. WIND GUSTS OF 40 MPH...SMALL HAIL...AND TORRENTIAL RAIN IS EXPECTED WITH THESE STORMS. STRONG
Special weather statement, Jun 20, 12:01 PM EDT, 3 hours 45 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1201 PM EDT SAT JUN 20 2009 MDZ016-017-VAZ057-201630- KING GEORGE VA-CHARLES MD-ST. MARYS MD- 1201 PM EDT SAT JUN 20 2009 ...STRONG THUNDERSTORM TO AFFECT KING GEORGE...CHARLES AND ST. MARYS COUNTIES... AT NOON...A STRONG THUNDERSTORM WAS NEAR BEL ALTON AND PORT TOBACCO... MOVING EAST AT 40 MPH. LOCATIONS THAT WILL LIKELY BE AFFECTED BY THIS STORM INCLUDE LEONARDTOWN... NEWBURG... FAULKNER... DAHLGREN... AND CHAPTICO. BRIEF TORRENTIAL RAIN... FREQUENT LIGHTNING...WIND GUSTS UP TO 45 MPH... AND SMALL HAIL ARE EXPECTED WITH THIS STORM. STRONG
Special weather statement, Jun 20, 2:35 PM EDT, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 235 PM EDT SAT JUN 20 2009 VAZ041-050-051-055-056-201915- ORANGE VA-STAFFORD VA-CULPEPER VA-FAUQUIER VA-SPOTSYLVANIA VA- 235 PM EDT SAT JUN 20 2009 ...STRONG THUNDERSTORMS TO AFFECT ORANGE...STAFFORD...CULPEPER... FAUQUIER AND SPOTSYLVANIA COUNTIES... AT 235 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES SOUTHWEST OF GOLDVEIN...MOVING SOUTHEAST AT 20 MPH. LOCATIONS THAT WILL LIKELY BE AFFECTED BY THIS STORM INCLUDE MASSAPONAX. WIND GUSTS OF 40 MPH AND SMALL HAIL CAN BE EXPECTED WITH THIS STORM. BAJ
Special weather statement, Jun 20, 3:02 PM EDT, 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 302 PM EDT SAT JUN 20 2009 MDZ006-007-011-201945- NORTHERN BALTIMORE MD-HARFORD MD-SOUTHERN BALTIMORE MD- 302 PM EDT SAT JUN 20 2009 ...STRONG THUNDERSTORMS TO AFFECT NORTHERN BALTIMORE...HARFORD AND SOUTHERN BALTIMORE COUNTIES... AT 302 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 2 MILES WEST OF COCKEYSVILLE...MOVING SOUTHEAST AT 25 MPH. LOCATIONS THAT WILL LIKELY BE AFFECTED BY THIS STORM INCLUDE TIMONIUM...LUTHERVILLE...EUDOWOOD...LOCH RAVEN...HAMPTON...LOCH RAVEN VILLAGE...CARNEY...GLEN ARM...PARKVILLE AND PERRY HALL. WIND GUSTS OF 40 TO 50 MPH AND SMALL HAIL CAN BE EXPECTED WITH THIS STORM. BAJ
Special weather statement, Jun 20, 3:06 PM EDT, 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 306 PM EDT SAT JUN 20 2009 MDZ016-017-VAZ055>057-201945- KING GEORGE VA-STAFFORD VA-CHARLES MD-ST. MARYS MD-SPOTSYLVANIA VA- 306 PM EDT SAT JUN 20 2009 ...STRONG THUNDERSTORMS TO AFFECT KING GEORGE...STAFFORD...CHARLES... ST. MARYS AND SPOTSYLVANIA COUNTIES... AT 306 PM EDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 2 MILES WEST OF CHAPTICO TO WHITE OAK...MOVING SOUTHEAST AT 30 MPH. LOCATIONS THAT WILL LIKELY BE AFFECTED BY THESE STORMS INCLUDE LEONARDTOWN...HOLLYWOOD...LEXINGTON PARK...CALIFORNIA...PATUXENT RIVER NAS...SAINT MARYS RIVER AND SAINT INIGOES CREEK. WIND GUSTS OF 40 MPH AND SMALL HAIL CAN BE EXPECTED WITH THESE STORMS. BAJ
Special weather statement, Jun 20, 3:41 PM EDT, 5 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 |
|---|---|---|---|---|
| Jun 19, 8:59 PM EDT | Small Craft Advisory | LWX | 69 hr | |
| Jun 20, 11:27 AM EDT | Special Marine Warning | LWX | 63 min | |
| Jun 20, 12:09 PM EDT | Special Marine Warning | LWX | 51 min | |
| Jun 20, 12:51 PM EDT | Special Marine Warning | LWX | 54 min | |
| Jun 20, 2:56 PM EDT | Special Marine Warning | LWX | 94 min | |
| Jun 20, 2:59 PM EDT | Special Marine Warning | LWX | 91 min | |
| Jun 20, 3:36 PM EDT | Special Marine Warning | LWX | 54 min | |
| Jun 20, 4:11 PM EDT | Special Marine Warning | LWX | 49 min | |
| Jun 20, 4:40 PM EDT | Special Marine Warning | LWX | 20 min | |
| Jun 20, 4:43 PM EDT | Special Marine Warning | LWX | 48 min | |
| Jun 20, 5:04 PM EDT | Gale Warning | LWX | 5 hr | |
| Jun 20, 3:24 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 53 min |
| Jun 20, 3:34 PM EDT | Tornado Warning | LWX | Harford | 26 min |
| Jun 20, 4:23 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 37 min |
Nearby
Tornado Warnings in Maryland, 2009Every tornado warning in 2009Tornadoes 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; the sounding from the Mesonet's radiosonde archive.