Alert archive / Virginia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 64, NWS Blacksburg, VA

April 26, 2012Mercer County, West Virginia; Bland County, Giles County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Apr 26, 2012, 6:16 PM EDT for Mercer County, West Virginia; Bland County, Giles County, Virginia. It was in force for 59 min. 4 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, 6:16 PM EDT (22:16 UTC)
Expired: Apr 26, 2012, 7:15 PM EDT
In force: 59 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

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

The radar

The Roanoke radar (KFCX), 83 km from the middle of the area, began a volume at 22:19 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, 6:28 PM EDT	HAIL 1	Princeton, WV	QUARTER SIZE HAIL FROM 628 TO 638 PM
Apr 26, 6:30 PM EDT	HAIL 0.5	3 E Matoaka, WV
Apr 26, 6:35 PM EDT	HAIL 1.25	1 Ese Princeton, WV	QUARTER TO HALF DOLLAR SIZE HAIL FROM 635PM TO 645PM
Apr 26, 7:12 PM EDT	HAIL 0.75	Bluefield, WV

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, 10.3 hours before the alert went out and 144 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.

372 
WUUS51 KRNK 262216
SVRRNK
VAC021-071-WVC055-262315-
/O.NEW.KRNK.SV.W.0064.120426T2216Z-120426T2315Z/

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

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN GILES COUNTY IN SOUTHWEST VIRGINIA
  NORTHEASTERN BLAND COUNTY IN SOUTHWEST VIRGINIA
  MERCER COUNTY IN SOUTHEAST WEST VIRGINIA

* UNTIL 715 PM EDT.

* AT 615 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR MATOAKA...AND
  MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MATOAKA...
  KEGLEY...
  PRINCETON...
  OAKVALE...
  CHAPEL...

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 3741 8133 3742 8129 3746 8131 3751 8126
      3753 8121 3733 8066 3726 8071 3717 8080
      3712 8090 3711 8093 3727 8128 3733 8136
      3735 8136
TIME...MOT...LOC 2216Z 297DEG 28KT 3743 8123

$$
KK

2 follow-up statements

947 
WWUS51 KRNK 262254
SVSRNK

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

VAC021-071-WVC055-262315-
/O.CON.KRNK.SV.W.0064.000000T0000Z-120426T2315Z/
GILES VA-BLAND VA-MERCER WV-
654 PM EDT THU APR 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHWESTERN GILES...NORTHEASTERN BLAND AND SOUTHERN MERCER
COUNTIES...

AT 647 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 OAKVALE...OR 8 MILES WEST OF NARROWS...MOVING SOUTHEAST
AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  CHAPEL...
  NARROWS...
  THESSALIA...
  BANE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3741 8133 3742 8129 3746 8131 3733 8066
      3726 8071 3718 8079 3711 8093 3727 8128
      3732 8135 3734 8136
TIME...MOT...LOC 2252Z 297DEG 28KT 3730 8092

$$

KK

626 
WWUS51 KRNK 262306
SVSRNK

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

VAC021-071-WVC055-262317-
/O.EXP.KRNK.SV.W.0064.000000T0000Z-120426T2315Z/
GILES VA-BLAND VA-MERCER WV-
706 PM EDT THU APR 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GILES...
NORTHEASTERN BLAND AND SOUTHERN MERCER COUNTIES EXPIRES AT 715 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 3741 8133 3742 8129 3746 8131 3733 8066
      3726 8071 3718 8079 3711 8093 3727 8128
      3732 8135 3734 8136
TIME...MOT...LOC 2307Z 297DEG 28KT 3725 8079

$$

KK

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 4:31 AM EDT	Special Weather Statement	RNK	Mercer, Monroe	29 min
Apr 26, 11:54 AM EDT	Areal Flood Advisory	RNK	Greenbrier, Mercer, Summers	3 hr
Apr 26, 2:53 PM EDT	Areal Flood Advisory	RNK	Greenbrier, Mercer, Summers	3 hr
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, 7:00 PM EDT	Flash Flood Warning	RNK	Mercer	6 hr
Apr 26, 7:10 PM EDT	Severe Thunderstorm Warning	RNK	Mercer	65 min
Apr 26, 7:26 PM EDT	Special Weather Statement	RNK	Monroe	64 min
Apr 26, 7:53 PM EDT	Severe Thunderstorm Warning	RNK	Monroe	52 min
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, 4:56 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, 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, 7:56 PM EDT	Special Weather Statement	RNK	Bath	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.