Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Baltimore/Washington

August 6, 2012Orange County, Virginia

NWS Baltimore/Washington issued this special weather statement at Aug 6, 2012, 7:17 PM EDT for Orange County, Virginia. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 6, 2012, 7:17 PM EDT (23:17 UTC)
Expired: Aug 6, 2012, 7:45 PM EDT
In force: 28 min
Issued by: NWS Baltimore/Washington

County Orange County, VA

The radar

The Sterling radar (KLWX), 110 km from the middle of the area, began a volume at 23:18 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 12:00Z, 11.3 hours before the alert went out and 158 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: 422 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 656 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 6, 3:33 PM EDT, 3 hours 44 minutes earlier.

Area forecast discussion, Aug 6, 3:33 PM EDT, 3 hours 44 minutes before

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Hazardous weather outlook, Aug 6, 7:16 PM EDT, 1 minute before

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In the hours before

Special weather statement, Aug 6, 3:21 PM EDT, 3 hours 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
321 PM EDT MON AUG 6 2012

VAZ025-026-061945-
ROCKINGHAM VA-AUGUSTA VA-
321 PM EDT MON AUG 6 2012

...STRONG THUNDERSTORM TO AFFECT ROCKINGHAM AND AUGUSTA COUNTIES...

AT 321 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER SANGERVILLE...
MOVING SOUTHEAST AT 10 MPH.

LOCATIONS IMPACTED INCLUDE BRIDGEWATER.

THIS STORM IS PRODUCING FREQUENT CLOUD TO GROUND LIGHTNING. MOVE
INDOORS IMMEDIATELY FOR YOUR SAFETY. IF YOU CAN HEAR THUNDER...YOU
ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

HEAVY RAIN WITH THIS STORM WILL REDUCE VISIBILITIES TO BELOW ONE MILE
AND MAY CAUSE PONDING OF WATER ON ROADWAYS.

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

&&

LAT...LON 3837 7878 3814 7894 3835 7921 3851 7912
TIME...MOT...LOC 1921Z 298DEG 10KT 3837 7908

CLS

Special weather statement, Aug 6, 3:43 PM EDT, 3 hours 34 minutes before

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Local storm report, Aug 6, 5:25 PM EDT, 1 hour 52 minutes before

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Local storm report, Aug 6, 5:31 PM EDT, 1 hour 46 minutes before

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Local storm report, Aug 6, 5:53 PM EDT, 1 hour 24 minutes before

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Special weather statement, Aug 6, 7:17 PM EDT, 0 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
Aug 6, 3:21 PM EDT	Special Weather Statement	LWX	City of Harrisonburg	24 min
Aug 6, 3:28 PM EDT	Severe Thunderstorm Warning	LWX	Augusta, Rockingham, City of Staunton	36 min
Aug 6, 3:43 PM EDT	Special Weather Statement	LWX	Highland	47 min

Nearby

Special Weather Statements in Virginia, 2012 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.