Alert archive / Virginia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 511, NWS Blacksburg, VA

August 25, 20114 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 25, 2011, 3:03 PM EDT for 4 counties in Virginia. It was in force for 57 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 25, 2011, 3:03 PM EDT (19:03 UTC)
Expired: Aug 25, 2011, 4:00 PM EDT
In force: 57 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Amherst County, VA, Bedford County, VA, City of Buena Vista, VA, Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 107 km from the middle of the area, began a volume at 19:07 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.

What was reported inside it

Time	Report	Where	Remark
Aug 25, 3:25 PM EDT	TSTM WND DMG	4 Nw Forks Of Buffalo, VA	TREES DOWN ON RT 60 WEST

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 7.1 hours before the alert went out and 54 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: 459 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1055 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 77 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.

378 
WUUS51 KRNK 251903
SVRRNK
VAC009-019-163-530-252000-
/O.NEW.KRNK.SV.W.0511.110825T1903Z-110825T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
303 PM EDT THU AUG 25 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ROCKBRIDGE COUNTY IN WEST CENTRAL VIRGINIA
  CITY OF BUENA VISTA IN WEST CENTRAL VIRGINIA
  NORTHERN BEDFORD COUNTY IN SOUTH CENTRAL VIRGINIA
  NORTHWESTERN AMHERST COUNTY IN CENTRAL VIRGINIA

* UNTIL 400 PM EDT.

* AT 302 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  NATURAL BRIDGE...OR NEAR GLASGOW...AND MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NATURAL BRIDGE...
  GLASGOW...
  FORKS OF BUFFALO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY
LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY
FROM WINDOWS UNTIL THE STORM HAS PASSED.

LARGE HAIL AND...OR STRONG DAMAGING WINDS ARE LIKELY WITH THIS STORM.
IN ADDITION...TORRENTIAL RAINS MAY FLOOD LOW LYING AREAS SUCH AS
DITCHES AND UNDERPASSES. DO NOT DRIVE INTO AREAS WHERE WATER COVERS
THE ROAD!

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF QUARTER OR
LARGER SIZED HAIL...AS WELL AS WIND DAMAGE...INCLUDING TREES OR LARGE
LIMBS DOWNED BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...
1...8 6 6...2 1 5...4 3 2 4.

&&

LAT...LON 3777 7915 3753 7916 3759 7958 3762 7961
      3776 7959
TIME...MOT...LOC 1904Z 270DEG 17KT 3766 7952

$$

SK

2 follow-up statements

847 
WWUS51 KRNK 251933
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
333 PM EDT THU AUG 25 2011

VAC009-019-163-530-252000-
/O.CON.KRNK.SV.W.0511.000000T0000Z-110825T2000Z/
ROCKBRIDGE VA-CITY OF BUENA VISTA VA-BEDFORD VA-AMHERST VA-
333 PM EDT THU AUG 25 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR THE CITY OF BUENA VISTA... SOUTHERN ROCKBRIDGE...NORTHERN BEDFORD
AND NORTHWESTERN AMHERST COUNTIES...

AT 330 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR SNOWDEN...OR NEAR
GLASGOW...MOVING EAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  SNOWDEN...
  ORONOCO...
  PLEASANT VIEW...
  FORKS OF BUFFALO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER.
REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...
DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY
HEAVY RAIN.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
THURSDAY EVENING FOR SOUTHWESTERN VIRGINIA.

&&

LAT...LON 3777 7915 3753 7916 3759 7958 3762 7961
      3776 7959
TIME...MOT...LOC 1933Z 270DEG 17KT 3766 7935

$$

SK

508 
WWUS51 KRNK 251954
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
354 PM EDT THU AUG 25 2011

VAC009-019-163-530-252004-
/O.EXP.KRNK.SV.W.0511.000000T0000Z-110825T2000Z/
ROCKBRIDGE VA-CITY OF BUENA VISTA VA-BEDFORD VA-AMHERST VA-
354 PM EDT THU AUG 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR THE CITY OF BUENA VISTA...
SOUTHERN ROCKBRIDGE...NORTHERN BEDFORD AND NORTHWESTERN AMHERST
COUNTIES EXPIRES AT 400 PM EDT...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LIMITS. THUS THE WARNING WILL BE ALLOWED TO EXPIRE.

TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4. ONCE AGAIN
THAT NUMBER IS 1...8 6 6...2 1 5...4 3 2 4.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
THURSDAY EVENING FOR SOUTHWESTERN VIRGINIA.

LAT...LON 3777 7915 3753 7916 3759 7958 3762 7961
      3776 7959
TIME...MOT...LOC 1954Z 270DEG 17KT 3766 7922

$$

SK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 1:54 PM EDT	Special Weather Statement	RNK	Bath	51 min
Aug 25, 2:03 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington	57 min
Aug 25, 2:45 PM EDT	Special Weather Statement	RNK	Roanoke	30 min
Aug 25, 2:46 PM EDT	Special Weather Statement	RNK	Botetourt	29 min
Aug 25, 3:00 PM EDT	Special Weather Statement	RNK	Amherst, City of Buena Vista, City of Lexington, City of Lynchburg	45 min
Aug 25, 3:10 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt	65 min
Aug 25, 3:28 PM EDT	Special Weather Statement	RNK	Montgomery, Roanoke	47 min
Aug 25, 4:19 PM EDT	Special Weather Statement	RNK	Appomattox, Buckingham, Campbell, Charlotte, City of Lynchburg	56 min
Aug 25, 4:23 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Pittsylvania	67 min
Aug 25, 4:29 PM EDT	Special Weather Statement	RNK	Franklin	46 min
Aug 25, 4:51 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Franklin, Pittsylvania	39 min
Aug 25, 5:00 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Buckingham	30 min
Aug 25, 5:02 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Patrick	43 min
Aug 25, 5:35 PM EDT	Special Weather Statement	RNK	Charlotte, Halifax	40 min
Aug 25, 6:13 PM EDT	Special Weather Statement	RNK	Charlotte	32 min
Aug 25, 6:19 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax	26 min
Aug 25, 6:27 PM EDT	Special Weather Statement	RNK	Bedford	48 min
Aug 25, 6:44 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Pittsylvania	46 min
Aug 25, 7:06 PM EDT	Special Weather Statement	RNK	Carroll	39 min
Aug 25, 7:31 PM EDT	Special Weather Statement	RNK	Campbell	44 min
Aug 25, 7:43 PM EDT	Severe Thunderstorm Warning	RNK	Carroll	47 min
Aug 25, 7:57 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	48 min

Nearby

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.