Alert archive / West Virginia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 214, NWS Baltimore/Washington

June 12, 2011Frederick County, Virginia; Allegany County, Frederick County, Washington County, Maryland; 4 counties in West Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 12, 2011, 2:10 PM EDT for Frederick County, Virginia; Allegany County, Frederick County, Washington County, Maryland; 4 counties in West Virginia. It was in force for 50 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 12, 2011, 2:10 PM EDT (18:10 UTC)
Expired: Jun 12, 2011, 3:00 PM EDT
In force: 50 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon

Counties Allegany County, MD, Frederick County, MD, Washington County, MD, Frederick County, VA, Berkeley County, WV, Hampshire County, WV, Mineral County, WV, Morgan County, WV

The radar

The Sterling radar (KLWX), 85 km from the middle of the area, began a volume at 18:10 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
Jun 12, 1:48 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.2 hours before the alert went out and 93 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: 360 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 861 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jun 12, 10:22 AM EDT, 3 hours 48 minutes earlier.

Area forecast discussion, Jun 12, 10:22 AM EDT, 3 hours 48 minutes before

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Hazardous weather outlook, Jun 12, 10:35 AM EDT, 3 hours 35 minutes before

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In the hours before

Special weather statement, Jun 12, 1:23 PM EDT, 47 minutes before

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Special weather statement, Jun 12, 1:25 PM EDT, 45 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
125 PM EDT SUN JUN 12 2011

VAZ025-026-029-037>039-121800-
GREENE VA-MADISON VA-PAGE VA-ALBEMARLE VA-AUGUSTA VA-ROCKINGHAM VA-
125 PM EDT SUN JUN 12 2011

...STRONG THUNDERSTORMS TO AFFECT GREENE...MADISON...PAGE...
ALBEMARLE...AUGUSTA AND ROCKINGHAM COUNTIES...

AT 125 PM EDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 3 MILES SOUTHEAST OF LINVILLE TO 2 MILES
NORTHWEST OF FORT DEFIANCE...MOVING SOUTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE MASSANUTTEN...GROTTOES...SHENANDOAH...
CRIMORA AND CROZET.

SMALL HAIL CAN BE EXPECTED WITH THESE STORMS.

&&

LAT...LON 3842 7836 3804 7871 3822 7915 3860 7880
TIME...MOT...LOC 1725Z 297DEG 22KT 3848 7876 3825 7898

Local storm report, Jun 12, 1:38 PM EDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
138 PM EDT SUN JUN 12 2011

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

0454 PM     HAIL             TYRO                    37.82N  79.00W
06/11/2011  E0.88 INCH       NELSON             VA   PUBLIC

&&

EVENT NUMBER LWX1100943

TCH

Special weather statement, Jun 12, 1:41 PM EDT, 29 minutes before

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Special weather statement, Jun 12, 1:46 PM EDT, 24 minutes before

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Special weather statement, Jun 12, 2:09 PM EDT, 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
209 PM EDT SUN JUN 12 2011

VAZ025-026-036>038-121845-
NELSON VA-GREENE VA-ALBEMARLE VA-AUGUSTA VA-ROCKINGHAM VA-
209 PM EDT SUN JUN 12 2011

...STRONG THUNDERSTORMS TO AFFECT NELSON...GREENE...ALBEMARLE...
AUGUSTA AND ROCKINGHAM COUNTIES...

AT 209 PM EDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 4 MILES EAST OF ROCKY BAR TO 2 MILES NORTH OF
LYNDHURST...MOVING SOUTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE WAYNESBORO...SHERANDO...AFTON...CROZET
AND FREE UNION.

WIND GUSTS OF 40 TO 50 MPH AND SMALL HAIL CAN BE EXPECTED WITH THESE
STORMS.

&&

LAT...LON 3808 7906 3841 7869 3823 7836 3821 7834
      3819 7837 3817 7832 3811 7829 3777 7873
TIME...MOT...LOC 1809Z 315DEG 17KT 3834 7862 3805 7893

JRK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 9:09 PM EDT	Special Weather Statement	LWX	Nelson	36 min
Jun 11, 9:27 PM EDT	Special Weather Statement	LWX	Madison	33 min
Jun 11, 9:52 PM EDT	Special Weather Statement	LWX	Albemarle, City of Charlottesville	38 min
Jun 12, 1:18 PM EDT	Special Marine Warning	LWX		39 min
Jun 12, 1:25 PM EDT	Special Weather Statement	LWX	City of Harrisonburg	35 min
Jun 12, 1:41 PM EDT	Special Weather Statement	LWX	Augusta, Nelson, City of Staunton, City of Waynesboro	34 min
Jun 12, 2:09 PM EDT	Special Weather Statement	LWX	Albemarle, City of Charlottesville, City of Waynesboro	36 min
Jun 12, 2:42 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Nelson, City of Charlottesville	48 min
Jun 12, 2:48 PM EDT	Special Marine Warning	LWX		87 min
Jun 12, 2:52 PM EDT	Special Weather Statement	LWX	Nelson	23 min
Jun 12, 3:05 PM EDT	Special Weather Statement	LWX	Shenandoah	25 min
Jun 12, 3:16 PM EDT	Severe Thunderstorm Warning	LWX	Loudoun	44 min
Jun 12, 3:24 PM EDT	Special Weather Statement	LWX	Clarke, City of Winchester	36 min
Jun 12, 3:32 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Loudoun	43 min
Jun 12, 3:34 PM EDT	Special Marine Warning	LWX		41 min
Jun 12, 3:38 PM EDT	Special Weather Statement	LWX	Page, Shenandoah	37 min
Jun 12, 3:50 PM EDT	Special Marine Warning	LWX		85 min
Jun 12, 4:03 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Fauquier, Loudoun, Prince William, City of Fairfax, City of Manassas and 1 more	42 min
Jun 12, 4:05 PM EDT	Special Weather Statement	LWX	Loudoun	25 min
Jun 12, 4:19 PM EDT	Special Marine Warning	LWX		116 min
Jun 12, 4:25 PM EDT	Special Marine Warning	LWX		2 hr
Jun 12, 4:34 PM EDT	Special Weather Statement	LWX	Warren	26 min
Jun 12, 4:36 PM EDT	Special Weather Statement	LWX	Madison	24 min
Jun 12, 4:45 PM EDT	Special Weather Statement	LWX	Fairfax, Fauquier, Prince William, City of Fairfax, City of Manassas, City of Manassas Park	30 min
Jun 12, 5:00 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Prince William, City of Alexandria, City of Fairfax, City of Manassas, City of Manassas Park	45 min
Jun 12, 5:12 PM EDT	Special Marine Warning	LWX		43 min
Jun 12, 5:35 PM EDT	Special Marine Warning	LWX		85 min
Jun 12, 5:48 PM EDT	Special Weather Statement	LWX	Stafford	27 min
Jun 12, 5:59 PM EDT	Special Weather Statement	LWX	King George	31 min
Jun 12, 6:04 PM EDT	Special Marine Warning	LWX		79 min
Jun 12, 6:10 PM EDT	Special Marine Warning	LWX		72 min
Jun 12, 6:11 PM EDT	Special Weather Statement	LWX	King George, Stafford, City of Fredericksburg	34 min
Jun 12, 6:12 PM EDT	Special Weather Statement	LWX	Fauquier	33 min
Jun 12, 6:14 PM EDT	Special Weather Statement	LWX	Nelson	31 min
Jun 12, 6:30 PM EDT	Severe Thunderstorm Warning	LWX	King George	45 min
Jun 12, 6:36 PM EDT	Special Marine Warning	LWX		54 min
Jun 11, 8:00 PM EDT	Special Weather Statement	LWX	Carroll	30 min
Jun 11, 8:18 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll	42 min
Jun 11, 8:54 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	51 min
Jun 11, 9:05 PM EDT	Special Weather Statement	LWX	Carroll	25 min
Jun 11, 9:45 PM EDT	Special Weather Statement	LWX	Harford	30 min
Jun 11, 10:13 PM EDT	Special Weather Statement	LWX	Harford	47 min
Jun 11, 10:55 PM EDT	Special Weather Statement	LWX	Harford	35 min
Jun 12, 1:09 PM EDT	Special Weather Statement	LWX	Anne Arundel	36 min
Jun 12, 1:46 PM EDT	Special Weather Statement	LWX	Allegany, Washington	29 min
Jun 12, 2:56 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	34 min
Jun 12, 3:07 PM EDT	Special Weather Statement	LWX	Calvert	23 min
Jun 12, 3:12 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	48 min
Jun 12, 3:45 PM EDT	Severe Thunderstorm Warning	LWX	Harford	45 min
Jun 12, 3:52 PM EDT	Tornado Warning	LWX	Harford	23 min
Jun 12, 4:13 PM EDT	Tornado Warning	LWX	Harford	47 min
Jun 12, 4:16 PM EDT	Special Weather Statement	LWX	Baltimore	29 min
Jun 12, 4:26 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	49 min
Jun 12, 4:41 PM EDT	Tornado Warning	LWX	Harford	35 min
Jun 12, 4:51 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford, City of Baltimore	39 min
Jun 12, 4:56 PM EDT	Special Weather Statement	LWX	Prince George's	34 min
Jun 12, 5:24 PM EDT	Special Weather Statement	LWX	Anne Arundel	36 min
Jun 12, 5:28 PM EDT	Special Weather Statement	LWX	City of Baltimore	32 min
Jun 12, 5:32 PM EDT	Special Weather Statement	LWX	Anne Arundel	28 min
Jun 12, 5:40 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	37 min
Jun 12, 6:55 PM EDT	Special Weather Statement	LWX	Anne Arundel	35 min
Jun 12, 3:00 PM EDT	Special Weather Statement	LWX	Berkeley, Jefferson	30 min

Nearby

Severe Thunderstorm Warnings in West Virginia, 2011 Severe Thunderstorm Warnings in Maryland, 2011 Severe Thunderstorm Warnings in 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.