Alert archive / Virginia / Special Weather Statements in 2011

Special Weather Statement, NWS Blacksburg, VA

April 12, 2011City of Covington, Virginia

NWS Blacksburg, VA issued this special weather statement at Apr 12, 2011, 4:07 PM EDT for City of Covington, Virginia. It was in force for 23 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: Apr 12, 2011, 4:07 PM EDT (20:07 UTC)
Expired: Apr 12, 2011, 4:30 PM EDT
In force: 23 min
Issued by: NWS Blacksburg, VA

County City of Covington, VA

The radar

The Roanoke radar (KFCX), 102 km from the middle of the area, began a volume at 20:11 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, 8.1 hours before the alert went out and 70 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: 187 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 519 m above ground
0-6 km bulk shear: 83 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.1

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 Blacksburg, VA wrote its last area forecast discussion before this special weather statement went out at Apr 12, 3:15 PM EDT, 52 minutes earlier.

Area forecast discussion, Apr 12, 3:15 PM EDT, 52 minutes before

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Hazardous weather outlook, Apr 12, 3:22 PM EDT, 45 minutes before

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In the hours before

Special weather statement, Apr 12, 2:19 PM EDT, 1 hour 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
219 PM EDT TUE APR 12 2011

VAZ018-019-WVZ045-121915-
ALLEGHANY VA-CRAIG VA-GREENBRIER WV-
219 PM EDT TUE APR 12 2011

...SHOWERS WITH HEAVY RAIN WILL AFFECT ALLEGHANY...CRAIG AND
GREENBRIER COUNTIES...

AT 215 PM EDT...SHOWERS WITH RUMBLES OF THUNDER AND HEAVY RAIN WERE
ALONG A LINE FROM 5 MILES NORTH OF COVINGTON CITY TO 4 MILES EAST OF
JORDAN MINES...MOVING NORTHWEST AT 10 MPH.

WIND GUSTS TO 30 MPH AND HAIL UP TO DIME SIZE ARE POSSIBLE WITH THESE
SHOWERS.

THESE SHOWERS WILL BE NEAR JORDAN MINES AROUND 230 PM...NATURAL WELL
AROUND 235 PM...CALLAGHAN AROUND 245 PM...CALLAGHAN AROUND 250 PM AND
NEOLA AROUND 315 PM.

LAT...LON 3802 7998 3795 8006 3794 8003 3796 8001
      3795 7993 3786 7985 3770 7994 3764 8003
      3759 8000 3752 8003 3786 8031 3804 8021
      3804 8016 3806 8011 3807 8002

RCS

Special weather statement, Apr 12, 2:21 PM EDT, 1 hour 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
221 PM EDT TUE APR 12 2011

VAZ035-045-046-121915-
AMHERST VA-APPOMATTOX VA-CAMPBELL VA-
221 PM EDT TUE APR 12 2011

...A SHOWER WITH HEAVY RAIN WILL AFFECT AMHERST...APPOMATTOX AND
CAMPBELL COUNTIES...

AT 219 PM EDT...A SHOWER WITH HEAVY RAIN WAS LOCATED 4 MILES NORTH OF
CONCORD...MOVING NORTH AT 20 MPH. RAINFALL RATES OF THREE QUARTERS
TO ONE INCH AN HOUR ARE POSSIBLE FROM THESE STORMS.

WIND GUSTS TO 30 MPH AND HAIL UP TO DIME SIZE ARE POSSIBLE WITH THIS
SHOWER.

THIS SHOWER WILL BE NEAR RIVERVILLE AROUND 240 PM...FALCONERVILLE
AROUND 255 PM...AMHERST AROUND 300 PM...NEW GLASGOW AROUND 310 PM AND
CLIFFORD AROUND 315 PM.

LAT...LON 3777 7906 3772 7906 3770 7899 3770 7898
      3754 7889 3735 7884 3731 7906 3776 7928
      3780 7910

RCS

Special weather statement, Apr 12, 2:43 PM EDT, 1 hour 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
243 PM EDT TUE APR 12 2011

VAZ018-022-023-121945-
BOTETOURT VA-CRAIG VA-ROANOKE VA-
243 PM EDT TUE APR 12 2011

...A SCATTERED THUNDERSTORMS WILL AFFECT BOTETOURT...CRAIG AND ROANOKE
COUNTIES...

AT 237 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES SOUTH OF
CATAWBA...MOVING NORTH AT 20 MPH.

WIND GUSTS TO 30 MPH AND HAIL UP TO DIME SIZE ARE POSSIBLE WITH THIS
STORM. RAINFALL RATES OF THREE QUARTERS TO ONE INCH AN HOUR ARE
POSSIBLE FROM THESE STORMS.

THIS STORM WILL BE NEAR CATAWBA AROUND 250 PM...ABBOTT AROUND 255 PM
AND NEW CASTLE AROUND 310 PM.

LAT...LON 3759 8016 3752 7987 3727 8007 3729 8023

RCS

Special weather statement, Apr 12, 3:26 PM EDT, 41 minutes before

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Local storm report, Apr 12, 3:34 PM EDT, 33 minutes before

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Special weather statement, Apr 12, 4:07 PM EDT, 0 minutes before

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The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 12, 4:14 AM EDT	Special Weather Statement	RNK	Giles, Pulaski	61 min
Apr 12, 4:43 AM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Grayson, Patrick	47 min
Apr 12, 5:11 AM EDT	Special Weather Statement	RNK	Pulaski	34 min
Apr 12, 5:17 AM EDT	Special Weather Statement	RNK	Patrick	28 min
Apr 12, 5:51 AM EDT	Special Weather Statement	RNK	Bedford, Franklin, Henry, City of Martinsville	39 min
Apr 12, 10:48 AM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	42 min
Apr 12, 11:25 AM EDT	Special Weather Statement	RNK	Bath	50 min
Apr 12, 12:34 PM EDT	Special Weather Statement	RNK	Carroll	41 min
Apr 12, 12:43 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	47 min
Apr 12, 2:19 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	56 min
Apr 12, 2:21 PM EDT	Special Weather Statement	RNK	Amherst	54 min
Apr 12, 2:43 PM EDT	Special Weather Statement	RNK	Roanoke	62 min
Apr 12, 3:29 PM EDT	Flash Flood Warning	RNK	Alleghany, Bath, Botetourt, Craig, City of Covington	6 hr
Apr 12, 5:12 PM EDT	Special Weather Statement	RNK	Amherst	33 min
Apr 12, 5:36 PM EDT	Special Weather Statement	RNK	City of Buena Vista	39 min
Apr 12, 5:57 PM EDT	Special Weather Statement	RNK	Bedford	48 min
Apr 12, 7:07 PM EDT	Special Weather Statement	RNK	Charlotte	53 min
Apr 12, 4:18 AM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes	27 min
Apr 12, 3:39 AM EDT	Special Weather Statement	RNK	Mercer	36 min
Apr 12, 4:32 PM EDT	Flash Flood Warning	RNK	Greenbrier	6 hr

Nearby

Special Weather Statements in Virginia, 2011 Every special weather statement 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.