Alert archive / Maryland / Tornado Warnings in 2011
Tornado Warning 9, NWS Baltimore/Washington
NWS Baltimore/Washington issued this tornado warning at Apr 5, 2011, 5:22 AM EDT for Calvert County, Saint Mary's County, Maryland. It was in force for 23 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 5, 2011, 5:22 AM EDT (09:22 UTC)
- Expired
- Apr 5, 2011, 5:45 AM EDT
- In force
- 23 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
Counties Calvert County, MD, Saint Mary's County, MD
The radar
The Dover AFB radar (KDOX), 112 km from the middle of the area, began a volume at 09:25 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 5, 5:24 AM EDT | TSTM WND DMG | Valley Lee, MD | TREE FELL ON MOBILE HOME |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 5, 2:18 AM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 9.4 hours before the alert went out and 95 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
- 1729 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 229 m²/s²
- 0-3 km storm-relative helicity
- 317 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
933
WFUS51 KLWX 050922
TORLWX
MDC009-037-051000-
/O.NEW.KLWX.TO.W.0009.110405T0922Z-110405T1000Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
522 AM EDT TUE APR 5 2011
THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHEASTERN CALVERT COUNTY IN SOUTHERN MARYLAND...
SOUTHEASTERN ST. MARYS COUNTY IN SOUTHERN MARYLAND...
* UNTIL 600 AM EDT
* AT 521 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 10 MILES
SOUTHWEST OF SAINT GEORGE ISLAND...OR NEAR CALLAO...MOVING
NORTHEAST AT 70 MPH.
* LOCATIONS IMPACTED INCLUDE...
SAINT GEORGE ISLAND...
SAINT INIGOES CREEK...
SAINT MARYS RIVER...
SAINT MARYS CITY...
LEXINGTON PARK...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING AND AVOID WINDOWS. IF OUTDOORS OR IN A MOBILE HOME OR
VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
TORNADOES AT NIGHT ARE DIFFICULT TO SEE AND CONFIRM. TAKE COVER NOW.
&&
LAT...LON 3810 7640 3810 7642 3812 7645 3810 7648
3813 7650 3813 7653 3818 7655 3821 7661
3841 7640 3839 7637 3832 7640 3830 7636
3825 7638 3814 7631 3803 7631
TIME...MOT...LOC 0922Z 235DEG 60KT 3801 7660
$$
LEE/GMS3 follow-up statements
258
WWUS51 KLWX 050931
SVSLWX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
531 AM EDT TUE APR 5 2011
MDC009-037-051000-
/O.CON.KLWX.TO.W.0009.000000T0000Z-110405T1000Z/
CALVERT MD-ST. MARYS MD-
531 AM EDT TUE APR 5 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 AM EDT FOR
SOUTHEASTERN ST. MARYS AND EXTREME SOUTHEASTERN CALVERT COUNTIES...
AT 526 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
TORNADOES. THESE TORNADOES WERE LOCATED ALONG A LINE EXTENDING FROM
PINEY POINT TO LEWISETTA...MOVING NORTHEAST AT 70 MPH.
LOCATIONS IMPACTED INCLUDE...
CHESAPEAKE RANCH ESTATES...
COVE POINT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING AND AVOID WINDOWS. IF OUTDOORS OR IN A MOBILE HOME OR
VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
TORNADOES AT NIGHT ARE DIFFICULT TO SEE AND CONFIRM. TAKE COVER NOW.
&&
LAT...LON 3810 7640 3810 7642 3812 7645 3810 7648
3813 7650 3813 7653 3818 7655 3821 7661
3841 7640 3839 7637 3832 7640 3830 7636
3825 7638 3814 7631 3803 7631
TIME...MOT...LOC 0931Z 230DEG 63KT 3817 7644 3807 7642
$$
LEE501
WWUS51 KLWX 050937
SVSLWX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
537 AM EDT TUE APR 5 2011
MDC009-037-051000-
/O.CON.KLWX.TO.W.0009.000000T0000Z-110405T1000Z/
CALVERT MD-ST. MARYS MD-
537 AM EDT TUE APR 5 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 AM EDT FOR
SOUTHEASTERN ST. MARYS AND EXTREME SOUTHEASTERN CALVERT COUNTIES...
AT 536 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
TORNADO WAS LOCATED 5 MILES SOUTH OF SAINT INIGOES CREEK NEAR
SCOTLAND...MOVING NORTHEAST AT 65 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING AND AVOID WINDOWS. IF OUTDOORS OR IN A MOBILE HOME OR
VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
TORNADOES AT NIGHT ARE DIFFICULT TO SEE AND CONFIRM. TAKE COVER NOW.
&&
LAT...LON 3810 7640 3810 7642 3812 7645 3810 7648
3813 7650 3813 7653 3818 7655 3821 7661
3841 7640 3839 7637 3832 7640 3830 7636
3825 7638 3814 7631 3803 7631
TIME...MOT...LOC 0937Z 242DEG 56KT 3806 7634
$$
LEE/GMS502
WWUS51 KLWX 050945
SVSLWX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
545 AM EDT TUE APR 5 2011
MDC009-037-050955-
/O.CAN.KLWX.TO.W.0009.000000T0000Z-110405T1000Z/
CALVERT MD-ST. MARYS MD-
545 AM EDT TUE APR 5 2011
...THE TORNADO WARNING IS CANCELLED FOR SOUTHEASTERN ST. MARYS AND
EXTREME SOUTHEASTERN CALVERT COUNTIES...
THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE WARNED
AREA. THUS THE TORNADO WARNING HAS BEEN CANCELLED.
LAT...LON 3810 7640 3810 7642 3812 7645 3810 7648
3813 7650 3813 7653 3818 7655 3821 7661
3841 7640 3839 7637 3832 7640 3830 7636
3825 7638 3814 7631 3803 7631
TIME...MOT...LOC 0945Z 242DEG 56KT 3812 7620
$$
LEEThe office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 3:56 AM EDT | Special Weather Statement | LWX | Carroll, Charles, Howard, Montgomery | 64 min |
| Apr 5, 4:29 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Montgomery, Prince George's | 51 min |
| Apr 5, 4:38 AM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 67 min |
| Apr 5, 4:40 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Harford, Howard, Montgomery and 2 more | 53 min |
| Apr 5, 4:46 AM EDT | Tornado Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's | 29 min |
| Apr 5, 4:55 AM EDT | Tornado Warning | LWX | Anne Arundel, Prince George's | 24 min |
| Apr 5, 4:57 AM EDT | Tornado Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 33 min |
| Apr 5, 5:05 AM EDT | Tornado Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 14 min |
| Apr 5, 8:32 AM EDT | Special Weather Statement | LWX | Anne Arundel, Baltimore, Harford, Howard, Prince George's, City of Baltimore | 58 min |
| Apr 5, 9:21 AM EDT | Special Weather Statement | LWX | Calvert, Charles, Saint Mary's | 54 min |
Nearby
Tornado Warnings in Maryland, 2011Every tornado warning in 2011Tornadoes in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.