Alert archive / Maryland / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 242, NWS Baltimore/Washington

July 28, 2012Anne Arundel County, Calvert County, Prince George's County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 28, 2012, 7:56 PM EDT for Anne Arundel County, Calvert County, Prince George's County, Maryland. It was in force for 49 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 28, 2012, 7:56 PM EDT (23:56 UTC)
Expired: Jul 28, 2012, 8:45 PM EDT
In force: 49 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 23:55 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 28, 1:36 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

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 28, 6:35 PM EDT, 1 hour 21 minutes earlier.

Area forecast discussion, Jul 28, 6:35 PM EDT, 1 hour 21 minutes before

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Hazardous weather outlook, Jul 28, 7:23 PM EDT, 33 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
723 PM EDT SAT JUL 28 2012

ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057-
291030-
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-
723 PM EDT SAT JUL 28 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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM FOR
COMMUNITIES SOUTHEAST OF BALTIMORE CITY AND WASHINGTON DC.
THUNDERSTORMS WILL BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS AND
LARGE HAIL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

THE SPOTTER NETWORK HAS BEEN ACTIVATED. PLEASE RELAY REPORTS OF
SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.

MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504-
WVZ050>053-055-501>506-291030-
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-
723 PM EDT SAT JUL 28 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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NO LONGER REQUIRED AT THIS TIME. PLEASE
RELAY REPORTS OF SEVERE WEATHER DIRECTLY TO THE NATIONAL WEATHER
SERVICE.

HTS

In the hours before

Special weather statement, Jul 28, 7:19 PM EDT, 37 minutes before

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Special weather statement, Jul 28, 7:34 PM EDT, 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
734 PM EDT SAT JUL 28 2012

MDZ013-016-VAZ053-054-290000-
CHARLES MD-PRINCE GEORGES MD-FAIRFAX VA-
ARLINGTON/FALLS CHURCH/ALEXANDRIA VA-
734 PM EDT SAT JUL 28 2012

...STRONG THUNDERSTORM TO AFFECT ARLINGTON...CHARLES...PRINCE GEORGES
AND FAIRFAX COUNTIES...

AT 734 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER NORTH
SPRINGFIELD...MOVING SOUTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE FRANCONIA...ROSE HILL...GROVETON...
JEFFERSON MANOR...HUNTINGTON...HYBLA VALLEY...BELLE HAVEN...MOUNT
VERNON...FORT WASHINGTON AND TANTALLON.

HEAVY DOWNPOURS AND WIND GUSTS OF 40 TO 50 MPH CAN BE EXPECTED WITH
THIS STORM.

&&

LAT...LON 3866 7703 3877 7731 3892 7720 3884 7702
      3881 7703 3883 7699 3878 7688
TIME...MOT...LOC 2334Z 301DEG 22KT 3879 7717

JRK

Local storm report, Jul 28, 7:39 PM EDT, 17 minutes before

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Special weather statement, Jul 28, 7:42 PM EDT, 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
742 PM EDT SAT JUL 28 2012

MDZ016-VAZ057-290000-
CHARLES MD-KING GEORGE VA-
742 PM EDT SAT JUL 28 2012

...STRONG THUNDERSTORM TO AFFECT CHARLES AND KING GEORGE COUNTIES...

AT 742 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 2 MILES NORTH OF
ROLLINS FORK...MOVING EAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE.

STORM INTENSITY IS INCREASING...AND SEVERE WEATHER MAY DEVELOP
RAPIDLY. REMAIN ALERT...AND BE PREPARED TO TAKE ACTION IF WARNINGS
ARE ISSUED.

WIND GUSTS IN EXCESS OF 50 MPH AND SMALL HAIL CAN BE EXPECTED WITH
THIS STORM. WINDS THIS STRONG CAN BRING DOWN LARGE TREE BRANCHES.
TAKE SHELTER UNTIL THE PASSED.

&&

LAT...LON 3828 7700 3825 7704 3818 7704 3815 7706
      3814 7708 3816 7710 3814 7712 3817 7715
      3830 7716
TIME...MOT...LOC 2342Z 266DEG 18KT 3822 7704

JRK

Special weather statement, Jul 28, 7:48 PM EDT, 8 minutes before

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Special weather statement, Jul 28, 7:50 PM EDT, 6 minutes before

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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 1:37 PM EDT	Special Marine Warning	LWX		83 min
Jul 28, 3:48 PM EDT	Special Marine Warning	LWX		87 min
Jul 28, 4:12 PM EDT	Special Weather Statement	LWX	Rappahannock	33 min
Jul 28, 4:17 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fauquier, Rappahannock	43 min
Jul 28, 4:50 PM EDT	Special Weather Statement	LWX	Albemarle, City of Charlottesville	25 min
Jul 28, 4:59 PM EDT	Special Weather Statement	LWX	Fauquier	31 min
Jul 28, 5:10 PM EDT	Special Marine Warning	LWX		46 min
Jul 28, 5:13 PM EDT	Special Weather Statement	LWX	Culpeper	32 min
Jul 28, 5:25 PM EDT	Special Weather Statement	LWX	Prince William	35 min
Jul 28, 5:32 PM EDT	Special Marine Warning	LWX		79 min
Jul 28, 5:39 PM EDT	Special Marine Warning	LWX		2 hr
Jul 28, 5:49 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Prince William	41 min
Jul 28, 6:01 PM EDT	Special Weather Statement	LWX	Culpeper	29 min
Jul 28, 6:21 PM EDT	Special Marine Warning	LWX		84 min
Jul 28, 7:31 PM EDT	Special Marine Warning	LWX		60 min
Jul 28, 7:34 PM EDT	Special Weather Statement	LWX	City of Alexandria, City of Falls Church	26 min
Jul 28, 7:40 PM EDT	Special Marine Warning	LWX		2 hr
Jul 28, 7:42 PM EDT	Special Weather Statement	LWX	King George	18 min
Jul 28, 1:40 PM EDT	Special Weather Statement	LWX	Calvert	20 min
Jul 28, 3:13 PM EDT	Special Weather Statement	LWX	Washington	27 min
Jul 28, 3:50 PM EDT	Special Weather Statement	LWX	Harford	25 min
Jul 28, 3:54 PM EDT	Severe Thunderstorm Warning	LWX	Harford	51 min
Jul 28, 4:03 PM EDT	Special Weather Statement	LWX	Washington	27 min
Jul 28, 4:28 PM EDT	Special Weather Statement	LWX	Frederick	47 min
Jul 28, 4:42 PM EDT	Severe Thunderstorm Warning	LWX	Harford	48 min
Jul 28, 5:05 PM EDT	Flash Flood Warning	LWX	Harford	103 min
Jul 28, 5:07 PM EDT	Special Weather Statement	LWX	Prince George's	38 min
Jul 28, 5:42 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	30 min
Jul 28, 5:55 PM EDT	Special Weather Statement	LWX	Anne Arundel	35 min
Jul 28, 6:15 PM EDT	Special Weather Statement	LWX	Prince George's	30 min
Jul 28, 6:31 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's	32 min
Jul 28, 7:12 PM EDT	Special Weather Statement	LWX	Calvert	33 min
Jul 28, 7:19 PM EDT	Special Weather Statement	LWX	Prince George's	26 min
Jul 28, 7:48 PM EDT	Special Weather Statement	LWX	Prince George's	27 min
Jul 28, 7:50 PM EDT	Special Weather Statement	LWX	Saint Mary's	25 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2012 Every 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; radar from the NEXRAD Level II archive.