Alert archive / Virginia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 147, NWS Baltimore/Washington

May 27, 2011Frederick County, Shenandoah County, Warren County, Virginia; Hampshire County, Hardy County, West Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at May 27, 2011, 12:28 AM EDT for Frederick County, Shenandoah County, Warren County, Virginia; Hampshire County, Hardy County, West Virginia. It was in force for 47 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: May 27, 2011, 12:28 AM EDT (04:28 UTC)
Expired: May 27, 2011, 1:15 AM EDT
In force: 47 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon

Counties Frederick County, VA, Shenandoah County, VA, Warren County, VA, Hampshire County, WV, Hardy County, WV

The radar

The Sterling radar (KLWX), 88 km from the middle of the area, began a volume at 04:28 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
May 26, 1:42 PM EDT	Severe Thunderstorm Watch	SPC	11 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 4.5 hours before the alert went out and 96 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 935 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1937 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 185 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

Open this sounding in Storm Lab

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 May 26, 11:50 PM EDT, 38 minutes earlier.

Area forecast discussion, May 26, 11:50 PM EDT, 38 minutes before

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Hazardous weather outlook, May 26, 11:52 PM EDT, 36 minutes before

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In the hours before

Local storm report, May 26, 10:13 PM EDT, 2 hours 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1013 PM EDT THU MAY 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0500 PM     HAIL             FRANKLIN                38.64N  79.33W
05/26/2011  M0.88 INCH       PENDLETON          WV   911 CALL CENTER

            NICKEL SIZE HAIL IN FRANKLIN... WEST VIRGINIA

&&

EVENT NUMBER LWX1100760

KLW

Special weather statement, May 26, 10:32 PM EDT, 1 hour 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1032 PM EDT THU MAY 26 2011

VAZ026-027-WVZ055-270300-
SHENANDOAH VA-HARDY WV-ROCKINGHAM VA-
1032 PM EDT THU MAY 26 2011

...STRONG THUNDERSTORM TO AFFECT SHENANDOAH...HARDY AND ROCKINGHAM
COUNTIES...

AT 1032 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3
MILES SOUTHWEST OF YANKEETOWN...MOVING NORTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE MATHIAS.

WIND GUSTS OF 40 TO 50 MPH AND SMALL HAIL CAN BE EXPECTED WITH THIS
STORM.

&&

LAT...LON 3867 7908 3872 7908 3876 7906 3877 7908
      3911 7897 3890 7852 3855 7894 3865 7910
TIME...MOT...LOC 0232Z 220DEG 33KT 3868 7895

BJL

Special weather statement, May 26, 10:42 PM EDT, 1 hour 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1042 PM EDT THU MAY 26 2011

VAZ025-026-504-WVZ506-270330-
EASTERN HIGHLAND VA-EASTERN PENDLETON WV-AUGUSTA VA-ROCKINGHAM VA-
1042 PM EDT THU MAY 26 2011

...STRONG THUNDERSTORM TO AFFECT EASTERN HIGHLAND...EASTERN
PENDLETON...AUGUSTA AND ROCKINGHAM COUNTIES...

AT 1043 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
PALO ALTO...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE BRANDYWINE...OAK FLAT AND DEER RUN.

WIND GUSTS OF 40 TO 50 MPH AND SMALL HAIL CAN BE EXPECTED WITH THIS
STORM.

&&

LAT...LON 3881 7922 3863 7883 3819 7931 3836 7956
TIME...MOT...LOC 0243Z 216DEG 40KT 3846 7935

BJL

Special weather statement, May 26, 11:11 PM EDT, 1 hour 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1111 PM EDT THU MAY 26 2011

MDZ003-502-WVZ051-052-270345-
WASHINGTON MD-BERKELEY WV-MORGAN WV-CENTRAL AND EASTERN ALLEGANY MD-
1111 PM EDT THU MAY 26 2011

...STRONG THUNDERSTORM TO AFFECT WASHINGTON...BERKELEY...MORGAN AND
CENTRAL AND EASTERN ALLEGANY COUNTIES...

AT 1111 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 2
MILES NORTHWEST OF GREAT CACAPON...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE NEW HOPE...SPOHRS CROSSROADS...SPRUCE PINE
HOLLOW...SLEEPY CREEK...LONG MEADOW AND HAGERSTOWN.

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 STORM HAS PASSED.

&&

LAT...LON 3972 7770 3962 7768 3954 7836 3972 7840
      3973 7831
TIME...MOT...LOC 0311Z 259DEG 39KT 3964 7827

BJL

Special weather statement, May 26, 11:15 PM EDT, 1 hour 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1115 PM EDT THU MAY 26 2011

VAZ027-028-WVZ050-055-270345-
SHENANDOAH VA-HARDY WV-HAMPSHIRE WV-FREDERICK VA-
1115 PM EDT THU MAY 26 2011

...STRONG THUNDERSTORM TO AFFECT SHENANDOAH...HARDY...HAMPSHIRE AND
FREDERICK COUNTIES...

AT 1116 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4
MILES SOUTHWEST OF PERRY...MOVING NORTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE MCCAULEY...BAKER...WARDENSVILLE...RIO...
CAPON SPRINGS...YELLOW SPRING AND DELRAY.

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

&&

LAT...LON 3929 7856 3916 7832 3883 7873 3891 7886
TIME...MOT...LOC 0316Z 216DEG 30KT 3894 7871

BJL

Local storm report, May 26, 11:52 PM EDT, 36 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
May 26, 10:02 PM EDT	Special Weather Statement	LWX	Rockingham	28 min
May 26, 10:17 PM EDT	Severe Thunderstorm Warning	LWX	Highland	43 min
May 26, 10:32 PM EDT	Special Weather Statement	LWX	Shenandoah	28 min
May 26, 10:53 PM EDT	Severe Thunderstorm Warning	LWX	Augusta, Highland, Rockingham	52 min
May 26, 11:07 PM EDT	Tornado Warning	LWX	Rockingham	38 min
May 26, 11:18 PM EDT	Severe Thunderstorm Warning	LWX	Augusta, Highland, Rockingham, City of Harrisonburg, City of Staunton	42 min
May 26, 11:23 PM EDT	Flash Flood Warning	LWX	Augusta, Highland, Rockingham	3 hr
May 26, 11:52 PM EDT	Severe Thunderstorm Warning	LWX	Augusta, Page, Rockingham, Shenandoah	53 min
May 27, 1:00 AM EDT	Severe Thunderstorm Warning	LWX	Clarke, Frederick, Loudoun, City of Winchester	45 min
May 27, 4:38 AM EDT	Flash Flood Watch	LWX	Highland	19 hr
May 27, 4:04 PM EDT	Special Weather Statement	LWX	Nelson	41 min
May 27, 4:08 PM EDT	Special Weather Statement	LWX	Nelson, City of Waynesboro	52 min
May 27, 5:07 PM EDT	Special Weather Statement	LWX	Albemarle, Greene, City of Charlottesville, City of Waynesboro	23 min
May 27, 5:38 PM EDT	Special Weather Statement	LWX	Culpeper, Madison, Orange	37 min
May 27, 5:57 PM EDT	Flash Flood Warning	LWX	Rockingham, Shenandoah	2 hr
May 27, 6:13 PM EDT	Special Weather Statement	LWX	Spotsylvania	32 min
May 27, 6:16 PM EDT	Special Weather Statement	LWX	Culpeper, Fauquier, Prince William, Rappahannock	44 min
May 27, 6:34 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fauquier, Prince William, Rappahannock	41 min
May 27, 6:37 PM EDT	Special Weather Statement	LWX	Stafford, City of Fredericksburg	38 min
May 27, 6:38 PM EDT	Special Marine Warning	LWX		2 hr
May 27, 6:40 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Fauquier, King George, Prince William, Spotsylvania, Stafford and 1 more	35 min
May 27, 6:45 PM EDT	Tornado Warning	LWX	Fairfax, Prince William, Spotsylvania, Stafford, City of Fredericksburg	30 min
May 27, 6:52 PM EDT	Special Weather Statement	LWX	Prince William, City of Manassas	23 min
May 27, 6:58 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Prince William, Stafford	32 min
May 27, 7:06 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Fauquier, Loudoun, Prince William, City of Fairfax, City of Manassas and 1 more	39 min
May 27, 7:21 PM EDT	Severe Thunderstorm Warning	LWX	Arlington, Fairfax, Loudoun, Prince William, City of Alexandria, City of Fairfax and 3 more	39 min
May 27, 7:29 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Loudoun	46 min
May 26, 11:47 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	58 min
May 27, 3:06 PM EDT	Special Weather Statement	LWX	Allegany	24 min
May 27, 3:13 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	38 min
May 27, 4:40 PM EDT	Special Weather Statement	LWX	Allegany	50 min
May 27, 4:53 PM EDT	Special Weather Statement	LWX	Allegany	37 min
May 27, 4:57 PM EDT	Flash Flood Warning	LWX	Allegany	6 hr
May 27, 5:04 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	15 min
May 27, 5:13 PM EDT	Special Weather Statement	LWX	Allegany	47 min
May 27, 5:29 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	31 min
May 27, 5:33 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	27 min
May 27, 5:38 PM EDT	Flash Flood Warning	LWX	Allegany	3 hr
May 27, 6:00 PM EDT	Special Weather Statement	LWX	Allegany	15 min
May 27, 7:55 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Carroll, Frederick, Howard, Montgomery and 1 more	50 min
May 27, 7:59 PM EDT	Special Weather Statement	LWX	Frederick, Washington	46 min
May 26, 10:07 PM EDT	Special Weather Statement	LWX	Pendleton	23 min
May 26, 10:42 PM EDT	Special Weather Statement	LWX	Pendleton	48 min
May 26, 11:11 PM EDT	Special Weather Statement	LWX	Morgan	34 min
May 26, 11:15 PM EDT	Special Weather Statement	LWX	Hardy	30 min
May 26, 11:32 PM EDT	Tornado Warning	LWX	Grant, Hardy	28 min
May 27, 2:46 PM EDT	Special Weather Statement	LWX	Mineral	29 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2011 Severe Thunderstorm Warnings in West Virginia, 2011 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.