Alert archive / Virginia / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 151, NWS Baltimore/Washington

June 25, 2007Nelson County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 25, 2007, 10:21 PM EDT for Nelson County, Virginia. It was in force for 39 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 25, 2007, 10:21 PM EDT (02:21 UTC)
Expired: Jun 25, 2007, 11:00 PM EDT
In force: 39 min
Issued by: NWS Baltimore/Washington
Area: Counties, with a storm outline in the text

County Nelson County, VA

The radar

The Roanoke radar (KFCX), 149 km from the middle of the area, began a volume at 02:21 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 nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 2.4 hours before the alert went out and 85 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: 310 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 1079 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -51 m²/s²
0-3 km storm-relative helicity: -35 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 25, 9:35 PM EDT, 46 minutes earlier.

Area forecast discussion, Jun 25, 9:35 PM EDT, 46 minutes before

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Hazardous weather outlook, Jun 25, 9:44 PM EDT, 37 minutes before

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In the hours before

Special weather statement, Jun 25, 4:41 PM EDT, 5 hours 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
441 PM EDT MON JUN 25 2007

WVZ055-252130-
HARDY WV-
441 PM EDT MON JUN 25 2007

...STRONG THUNDERSTORM TO AFFECT NORTHEAST HARDY COUNTY...

AT 441 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
MCCAULEY...MOVING EAST AT 15 MPH.

THIS STORM WILL PRODUCE FREQUENT LIGHTNING AND TORRENTIAL RAINFALL.
THIS STORM WILL ALSO BE CAPABLE OF PRODUCING SMALL HAIL AND WIND
GUSTS TO 40 MPH.

THE COMMUNITIES OF MCCAULEY...BEAN SETTLEMENT...RIO AND WARDENSVILLE
WILL BE AFFECTED BY THIS STORM.

ROGOWSKI/PELOQUIN

Special weather statement, Jun 25, 5:01 PM EDT, 5 hours 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
501 PM EDT MON JUN 25 2007

WVZ050-252145-
HAMPSHIRE WV-
501 PM EDT MON JUN 25 2007

...STRONG THUNDERSTORMS TO AFFECT SOUTHEAST HAMPSHIRE COUNTY...

AT 501 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES
WEST OF CAPON SPRINGS...MOVING EAST AT 10 MPH.

THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO
40 MPH...IN ADDITION TO FREQUENT LIGHTNING STRIKES AND TORRENTIAL
RAINFALL.

THE COMMUNITIES OF YELLOW SPRING...CAPON SPRINGS...KIRBY AND DELRAY
WILL BE AFFECTED BY THIS STORM.

ROGOWSKI/PELOQUIN

Special weather statement, Jun 25, 5:53 PM EDT, 4 hours 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
553 PM EDT MON JUN 25 2007

VAZ028-252230-
FREDERICK VA-
553 PM EDT MON JUN 25 2007

...STRONG THUNDERSTORMS TO AFFECT FREDERICK COUNTY...

AT 553 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR
WINCHESTER...MOVING EAST AT 5 MPH.

THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO
50 MPH.

THE COMMUNITIES OF WINCHESTER...STEPHENS CITY AND THE WINCHESTER
AIRPORT WILL BE AFFECTED BY THIS STORM.

RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE WARNINGS ARE
ISSUED.

MANNING

Special weather statement, Jun 25, 6:35 PM EDT, 3 hours 46 minutes before

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Special weather statement, Jun 25, 7:04 PM EDT, 3 hours 17 minutes before

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Special weather statement, Jun 25, 7:23 PM EDT, 2 hours 58 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
Jun 26, 2:13 PM EDT	Special Marine Warning	LWX		60 min
Jun 26, 2:06 PM EDT	Flash Flood Warning	LWX	Baltimore, City of Baltimore	114 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2007 Every severe thunderstorm warning in 2007

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.