Alert archive / Virginia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 310, NWS Blacksburg, VA

July 27, 2012Amherst County, Appomattox County, Buckingham County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 27, 2012, 5:10 PM EDT for Amherst County, Appomattox County, Buckingham County, Virginia. It was in force for 65 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: Jul 27, 2012, 5:10 PM EDT (21:10 UTC)
Expired: Jul 27, 2012, 6:15 PM EDT
In force: 65 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Amherst County, VA, Appomattox County, VA, Buckingham County, VA

The radar

The Roanoke radar (KFCX), 160 km from the middle of the area, began a volume at 21:11 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.

What was reported inside it

Time	Report	Where	Remark
Jul 27, 5:12 PM EDT	TSTM WND DMG	4 Wnw Bent Creek, VA	NUMEROUS LARGE TREE LIMBS BLOWN DOWN ALONG OLD GALILEE ROAD.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 27, 1:54 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 9.2 hours before the alert went out and 90 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: 408 J/kg
Mixed-layer CIN: -166 J/kg
Mixed-layer LCL: 912 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 46 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.

920 
WUUS51 KRNK 272110
SVRRNK
VAC009-011-029-272215-
/O.NEW.KRNK.SV.W.0310.120727T2110Z-120727T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
510 PM EDT FRI JUL 27 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BUCKINGHAM COUNTY IN CENTRAL VIRGINIA
  NORTHERN APPOMATTOX COUNTY IN CENTRAL VIRGINIA
  EASTERN AMHERST COUNTY IN CENTRAL VIRGINIA

* UNTIL 615 PM EDT.

* AT 507 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR NEW GLASGOW...OR NEAR
  AMHERST...AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NEW GLASGOW...
  BENT CREEK...
  WINGINA...
  CENTENARY...
  AND NEW CANTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS OVER AMHERST 
COUNTY. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY 
FROM WINDOWS!

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
FRIDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3746 7837 3748 7905 3766 7909 3769 7898
      3756 7890 3754 7883 3764 7882 3764 7872
      3770 7869 3769 7865 3771 7866 3776 7861
      3776 7851 3780 7849 3774 7842 3769 7824
      3764 7824
TIME...MOT...LOC 2110Z 254DEG 33KT 3759 7894

$$

AMS

3 follow-up statements

252 
WWUS51 KRNK 272130
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
530 PM EDT FRI JUL 27 2012

VAC009-272140-
/O.CAN.KRNK.SV.W.0310.000000T0000Z-120727T2215Z/
AMHERST VA-
530 PM EDT FRI JUL 27 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN AMHERST COUNTY IS
CANCELLED...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
FRIDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3746 7837 3748 7878 3754 7885 3755 7885
      3754 7883 3764 7882 3764 7872 3770 7869
      3769 7865 3771 7866 3776 7861 3776 7851
      3780 7849 3774 7842 3769 7824 3764 7824
TIME...MOT...LOC 2130Z 254DEG 33KT 3764 7872

$$

VAC011-029-272215-
/O.CON.KRNK.SV.W.0310.000000T0000Z-120727T2215Z/
BUCKINGHAM VA-APPOMATTOX VA-
530 PM EDT FRI JUL 27 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR BUCKINGHAM AND NORTHERN APPOMATTOX COUNTIES...

AT 528 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR WINGINA...OR 9 MILES NORTHEAST OF BENT CREEK...MOVING
EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  WINGINA...
  BUCKINGHAM...
  CENTENARY...
  GOLD HILL...
  AND NEW CANTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 1000 PM EDT
FRIDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3746 7837 3748 7878 3754 7885 3755 7885
      3754 7883 3764 7882 3764 7872 3770 7869
      3769 7865 3771 7866 3776 7861 3776 7851
      3780 7849 3774 7842 3769 7824 3764 7824
TIME...MOT...LOC 2130Z 254DEG 33KT 3764 7872

$$

AMS

148 
WWUS51 KRNK 272156
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
556 PM EDT FRI JUL 27 2012

VAC011-272207-
/O.CAN.KRNK.SV.W.0310.000000T0000Z-120727T2215Z/
APPOMATTOX VA-
556 PM EDT FRI JUL 27 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN APPOMATTOX COUNTY IS
CANCELLED...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
FRIDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3746 7837 3747 7848 3771 7866 3776 7861
      3776 7851 3780 7849 3774 7842 3769 7824
      3764 7824
TIME...MOT...LOC 2157Z 262DEG 37KT 3769 7830

$$

VAC029-272215-
/O.CON.KRNK.SV.W.0310.000000T0000Z-120727T2215Z/
BUCKINGHAM VA-
556 PM EDT FRI JUL 27 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR EASTERN BUCKINGHAM COUNTY...

AT 553 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 NEW CANTON...OR 7
MILES SOUTHWEST OF FORK UNION...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  NEW CANTON...

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
FRIDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3746 7837 3747 7848 3771 7866 3776 7861
      3776 7851 3780 7849 3774 7842 3769 7824
      3764 7824
TIME...MOT...LOC 2157Z 262DEG 37KT 3769 7830

$$

AMS

376 
WWUS51 KRNK 272209
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
609 PM EDT FRI JUL 27 2012

VAC029-272219-
/O.EXP.KRNK.SV.W.0310.000000T0000Z-120727T2215Z/
BUCKINGHAM VA-
609 PM EDT FRI JUL 27 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN BUCKINGHAM COUNTY
EXPIRES AT 615 PM EDT...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE 
AREA. 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 1000 PM EDT
FRIDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTH CENTRAL
VIRGINIA.

LAT...LON 3746 7837 3747 7848 3771 7866 3776 7861
      3776 7851 3780 7849 3774 7842 3769 7824
      3764 7824
TIME...MOT...LOC 2209Z 262DEG 37KT 3771 7814

$$

AMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 1:35 PM EDT	Severe Thunderstorm Warning	RNK	Giles	55 min
Jul 27, 2:07 PM EDT	Flash Flood Warning	RNK	Tazewell	65 min
Jul 27, 2:17 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Giles	52 min
Jul 27, 3:02 PM EDT	Special Weather Statement	RNK	Montgomery, Pulaski, Roanoke, City of Radford, City of Roanoke, City of Salem	58 min
Jul 27, 3:14 PM EDT	Special Weather Statement	RNK	Patrick	31 min
Jul 27, 3:15 PM EDT	Special Weather Statement	RNK	Alleghany, Botetourt, Craig, City of Covington	30 min
Jul 27, 3:19 PM EDT	Severe Thunderstorm Warning	RNK	Campbell, Halifax, Pittsylvania, City of Danville	56 min
Jul 27, 3:27 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Craig, Franklin, Roanoke, City of Roanoke and 1 more	78 min
Jul 27, 3:47 PM EDT	Special Weather Statement	RNK	Carroll, Floyd, Henry, Patrick, City of Galax, City of Martinsville	58 min
Jul 27, 3:52 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Amherst, Botetourt, Rockbridge, City of Buena Vista, City of Covington and 1 more	53 min
Jul 27, 4:00 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Franklin, Roanoke	30 min
Jul 27, 4:06 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte	45 min
Jul 27, 4:12 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Franklin, Pittsylvania	63 min
Jul 27, 4:22 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Patrick	68 min
Jul 27, 4:37 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Bedford, Campbell, City of Lynchburg	53 min
Jul 27, 4:51 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Buena Vista, City of Lexington	24 min
Jul 27, 5:20 PM EDT	Special Weather Statement	RNK	Appomattox	25 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2012 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.