Alert archive / Virginia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 9, NWS Blacksburg, VA

March 23, 20114 counties in Virginia; Monroe County, West Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Mar 23, 2011, 4:37 PM EDT for 4 counties in Virginia; Monroe County, West Virginia. It was in force for 43 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: Mar 23, 2011, 4:37 PM EDT (20:37 UTC)
Expired: Mar 23, 2011, 5:20 PM EDT
In force: 43 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Alleghany County, VA, Botetourt County, VA, City of Covington, VA, Craig County, VA, Monroe County, WV

The radar

The Roanoke radar (KFCX), 70 km from the middle of the area, began a volume at 20:38 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
Mar 23, 5:24 PM EDT	HAIL 0.5	Eagle Rock, VA

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
Mar 23, 3:45 PM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 8.6 hours before the alert went out and 74 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1256 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 271 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.

389 
WUUS51 KRNK 232037
SVRRNK
VAC005-023-045-580-WVC063-232130-
/O.NEW.KRNK.SV.W.0009.110323T2037Z-110323T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
437 PM EDT WED MAR 23 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CITY OF COVINGTON IN WEST CENTRAL VIRGINIA
  CRAIG COUNTY IN SOUTHWEST VIRGINIA
  WESTERN BOTETOURT COUNTY IN WEST CENTRAL VIRGINIA
  SOUTHWESTERN ALLEGHANY COUNTY IN WEST CENTRAL VIRGINIA
  SOUTHEASTERN MONROE COUNTY IN SOUTHEAST WEST VIRGINIA

* UNTIL 530 PM EDT.

* AT 434 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  WAITEVILLE...OR 6 MILES SOUTH OF UNION...AND MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WAITEVILLE...
  CRAIG SPRINGS...
  NEW CASTLE...
  FINCASTLE...
  SPRINGWOOD...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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.

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.

&&

LAT...LON 3777 8003 3773 7971 3743 7976 3741 8007
      3742 8008 3735 8028 3748 8051 3772 8025
      3774 8026 3778 8023 3778 8022 3779 8022
      3782 8020
TIME...MOT...LOC 2037Z 267DEG 45KT 3750 8046

$$

WERT

2 follow-up statements

642 
WWUS51 KRNK 232101
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
501 PM EDT WED MAR 23 2011

VAC580-WVC063-232111-
/O.CAN.KRNK.SV.W.0009.000000T0000Z-110323T2130Z/
CITY OF COVINGTON VA-MONROE WV-
501 PM EDT WED MAR 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR THE CITY OF COVINGTON...
EASTERN MONROE COUNTY IS CANCELLED...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.

&&

LAT...LON 3773 7971 3743 7976 3741 8007 3742 8008
      3735 8028 3746 8029 3760 8027 3762 8022
      3765 8026 3772 8005
TIME...MOT...LOC 2101Z 266DEG 43KT 3764 7993

$$

VAC005-023-045-232130-
/O.CON.KRNK.SV.W.0009.000000T0000Z-110323T2130Z/
CRAIG VA-BOTETOURT VA-ALLEGHANY VA-
501 PM EDT WED MAR 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHWESTERN ALLEGHANY...CENTRAL BOTETOURT AND CRAIG COUNTIES...

AT 459 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ORISKANY...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  ORISKANY...
  EAGLE ROCK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.

&&

LAT...LON 3773 7971 3743 7976 3741 8007 3742 8008
      3735 8028 3746 8029 3760 8027 3762 8022
      3765 8026 3772 8005
TIME...MOT...LOC 2101Z 266DEG 43KT 3764 7993

$$

WERT

291 
WWUS51 KRNK 232120
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
520 PM EDT WED MAR 23 2011

VAC005-023-045-232130-
/O.CAN.KRNK.SV.W.0009.000000T0000Z-110323T2130Z/
CRAIG VA-BOTETOURT VA-ALLEGHANY VA-
520 PM EDT WED MAR 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ALLEGHANY...
CENTRAL BOTETOURT AND CRAIG COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED AND
EXITED THE WARNED AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED.

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.

LAT...LON 3773 7971 3743 7976 3741 8007 3742 8008
      3735 8028 3746 8029 3760 8027 3762 8022
      3765 8026 3772 8005
TIME...MOT...LOC 2120Z 266DEG 43KT 3766 7964

$$

DW

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 23, 4:01 PM EDT	Severe Thunderstorm Warning	RNK	Giles, Tazewell	59 min
Mar 23, 4:07 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Tazewell	41 min
Mar 23, 4:42 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Patrick, Pulaski, Wythe, City of Galax	63 min
Mar 23, 4:48 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Amherst, Bath, Rockbridge, City of Buena Vista, City of Lexington	57 min
Mar 23, 5:14 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington	26 min
Mar 23, 5:18 PM EDT	Severe Thunderstorm Warning	RNK	Grayson	57 min
Mar 23, 5:25 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Patrick, Pittsylvania, City of Danville, City of Martinsville	65 min
Mar 23, 5:36 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Grayson, Patrick	54 min
Mar 23, 6:43 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath	62 min
Mar 23, 7:34 PM EDT	Special Weather Statement	RNK	Alleghany, Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista and 2 more	56 min
Mar 23, 7:57 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Giles, Pulaski, Smyth, Tazewell, Wythe and 1 more	63 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2011 Severe Thunderstorm Warnings in West 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.