Alert archive / Virginia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 65, NWS Blacksburg, VA

April 26, 20124 counties in Virginia; Mercer County, West Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Apr 26, 2012, 7:10 PM EDT for 4 counties in Virginia; Mercer County, West Virginia. It was in force for 65 min. 2 reports 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: Apr 26, 2012, 7:10 PM EDT (23:10 UTC)
Expired: Apr 26, 2012, 8:15 PM EDT
In force: 65 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Bland County, VA, Giles County, VA, Tazewell County, VA, Wythe County, VA, Mercer County, WV

The radar

The Roanoke radar (KFCX), 96 km from the middle of the area, began a volume at 23:10 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
Apr 26, 7:12 PM EDT	HAIL 0.75	Bluefield, WV
Apr 26, 7:45 PM EDT	HAIL 1	Abbs Valley, VA	DISPATCHER AT 911 CENTER REPORTED QUARTER SIZE HAIL AT HER HOUSE IN ABBS VALLEY

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, 11.2 hours before the alert went out and 162 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: 802 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -140 m²/s²
0-3 km storm-relative helicity: -105 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.

422 
WUUS51 KRNK 262310
SVRRNK
VAC021-071-185-197-WVC055-270015-
/O.NEW.KRNK.SV.W.0065.120426T2310Z-120427T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
710 PM EDT THU APR 26 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN TAZEWELL COUNTY IN SOUTHWEST VIRGINIA
  NORTHERN WYTHE COUNTY IN SOUTHWEST VIRGINIA
  SOUTHWESTERN GILES COUNTY IN SOUTHWEST VIRGINIA
  BLAND COUNTY IN SOUTHWEST VIRGINIA
  SOUTHWESTERN MERCER COUNTY IN SOUTHEAST WEST VIRGINIA

* UNTIL 815 PM EDT.

* AT 705 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...
  AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED
  NEAR POCAHONTAS...OR NEAR BLUEFIELD...AND MOVING SOUTHEAST AT 35
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  BLUEFIELD...
  BLUEFIELD...
  CLEAR FORK...
  HICKSVILLE...
  KIMBERLING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3725 8172 3721 8168 3721 8156 3723 8152
      3726 8150 3728 8142 3739 8134 3722 8075
      3718 8079 3711 8093 3706 8091 3693 8104
      3720 8179
TIME...MOT...LOC 2311Z 295DEG 29KT 3726 8127

$$
KK

2 follow-up statements

550 
WWUS51 KRNK 262331
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
731 PM EDT THU APR 26 2012

VAC021-071-185-197-WVC055-270015-
/O.CON.KRNK.SV.W.0065.000000T0000Z-120427T0015Z/
TAZEWELL VA-WYTHE VA-GILES VA-BLAND VA-MERCER WV-
731 PM EDT THU APR 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR NORTHERN TAZEWELL...NORTHERN WYTHE...SOUTHWESTERN GILES...BLAND
AND SOUTHWESTERN MERCER COUNTIES...

AT 729 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 HICKSVILLE...OR NEAR ROCKY GAP...MOVING SOUTHEAST AT 35 
MPH. ANOTHER STRONG THUNDERSTORM NEAR TIPTOP WAS MOVING SOUTHEAST AT 
30 MPH. 

LOCATIONS IMPACTED INCLUDE...
  HICKSVILLE...
  KIMBERLING...
  MECHANICSBURG...
  LONG SPUR...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3725 8172 3721 8168 3721 8156 3724 8151
      3726 8150 3728 8142 3732 8138 3722 8075
      3718 8079 3711 8093 3706 8091 3693 8104
      3720 8179
TIME...MOT...LOC 2330Z 295DEG 29KT 3719 8110

$$

KK

557 
WWUS51 KRNK 270014
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
814 PM EDT THU APR 26 2012

VAC021-071-185-197-WVC055-270024-
/O.EXP.KRNK.SV.W.0065.000000T0000Z-120427T0015Z/
TAZEWELL VA-WYTHE VA-GILES VA-BLAND VA-MERCER WV-
814 PM EDT THU APR 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN TAZEWELL...NORTHERN
WYTHE...SOUTHWESTERN GILES...BLAND AND SOUTHWESTERN MERCER COUNTIES
EXPIRES AT 815 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.

LAT...LON 3725 8172 3721 8168 3721 8156 3724 8151
      3726 8150 3728 8142 3732 8138 3722 8075
      3718 8079 3711 8093 3706 8091 3693 8104
      3720 8179
TIME...MOT...LOC 0014Z 295DEG 29KT 3704 8070

$$

KK

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 11:39 PM EDT	Special Weather Statement	RNK	Bland	36 min
Apr 25, 11:52 PM EDT	Severe Thunderstorm Warning	RNK	Smyth, Tazewell	23 min
Apr 26, 12:17 AM EDT	Special Weather Statement	RNK	Smyth	28 min
Apr 26, 12:39 AM EDT	Special Weather Statement	RNK	Grayson, City of Galax	36 min
Apr 26, 1:15 AM EDT	Special Weather Statement	RNK	Patrick	15 min
Apr 26, 2:38 AM EDT	Special Weather Statement	RNK	Carroll	37 min
Apr 26, 4:31 AM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	29 min
Apr 26, 4:56 AM EDT	Special Weather Statement	RNK	Bland, Botetourt, Craig, Giles, Montgomery, Pulaski and 5 more	34 min
Apr 26, 7:59 AM EDT	Areal Flood Advisory	RNK	Tazewell	3 hr
Apr 26, 8:31 AM EDT	Special Weather Statement	RNK	Smyth	59 min
Apr 26, 8:45 AM EDT	Severe Thunderstorm Warning	RNK	Grayson	60 min
Apr 26, 8:57 AM EDT	Severe Thunderstorm Warning	RNK	Bland, Grayson, Smyth, Tazewell, Wythe	63 min
Apr 26, 9:18 AM EDT	Special Weather Statement	RNK	Carroll, Grayson, City of Galax	27 min
Apr 26, 9:31 AM EDT	Special Weather Statement	RNK	Bland, Wythe	29 min
Apr 26, 10:42 AM EDT	Special Weather Statement	RNK	Henry, City of Danville	63 min
Apr 26, 11:09 AM EDT	Areal Flood Advisory	RNK	Tazewell	3 hr
Apr 26, 11:54 AM EDT	Areal Flood Advisory	RNK	Bland	3 hr
Apr 26, 12:44 PM EDT	Areal Flood Advisory	RNK	Alleghany, Bath, City of Covington	6 hr
Apr 26, 2:03 PM EDT	Areal Flood Advisory	RNK	Tazewell	6 hr
Apr 26, 2:53 PM EDT	Areal Flood Advisory	RNK	Bland	3 hr
Apr 26, 6:16 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Giles	59 min
Apr 26, 7:00 PM EDT	Flash Flood Warning	RNK	Bland, Tazewell	6 hr
Apr 26, 7:53 PM EDT	Severe Thunderstorm Warning	RNK	Craig, Giles, Montgomery	52 min
Apr 26, 7:56 PM EDT	Special Weather Statement	RNK	Bath	64 min
Apr 26, 2:39 AM EDT	Special Weather Statement	RNK	Greenbrier	36 min
Apr 26, 3:55 AM EDT	Special Weather Statement	RNK	Greenbrier, Summers	35 min
Apr 26, 6:25 PM EDT	Special Weather Statement	RNK	Greenbrier	65 min
Apr 26, 6:34 PM EDT	Flash Flood Warning	RNK	Mercer, Summers	6 hr
Apr 26, 6:51 PM EDT	Flash Flood Warning	RNK	Greenbrier, Summers	6 hr
Apr 26, 7:26 PM EDT	Special Weather Statement	RNK	Monroe	64 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2012 Severe Thunderstorm Warnings in West 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.