Alert archive / Virginia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 89, NWS Blacksburg, VA

May 3, 2012Carroll County, Grayson County, Wythe County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at May 3, 2012, 3:37 PM EDT for Carroll County, Grayson County, Wythe County, Virginia. It was in force for 53 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: May 3, 2012, 3:37 PM EDT (19:37 UTC)
Expired: May 3, 2012, 4:30 PM EDT
In force: 53 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Carroll County, VA, Grayson County, VA, Wythe County, VA

The radar

The Roanoke radar (KFCX), 77 km from the middle of the area, began a volume at 19:39 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
May 3, 3:41 PM EDT	HAIL 1	3 N Spring Valley, VA	LASTED FOR 15 MINUTES AND COVERED THE GROUND ON BRUSH CREEK ROAD.

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.6 hours before the alert went out and 132 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: 789 J/kg
Mixed-layer CIN: -237 J/kg
Mixed-layer LCL: 1246 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 48 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.

577 
WUUS51 KRNK 031937
SVRRNK

VAC035-077-197-032030-
/O.NEW.KRNK.SV.W.0089.120503T1937Z-120503T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
337 PM EDT THU MAY 3 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CARROLL COUNTY IN SOUTHWEST VIRGINIA...
  GRAYSON COUNTY IN SOUTHWEST VIRGINIA...
  WYTHE COUNTY IN SOUTHWEST VIRGINIA...

* UNTIL 430 PM EDT

* AT 335 PM EDT...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 CRIPPLE CREEK...OR 3 
  MILES EAST OF SPEEDWELL...AND MOVING NORTHEAST AT 15 MPH. 

* LOCATIONS IMPACTED INCLUDE...
  WYTHEVILLE...SPEEDWELL...INDEPENDENCE...FRIES...COLEMAN STORE...
  CRIPPLE CREEK...ELK CREEK...SPRING VALLEY...
  BYLLESBY AND IVANHOE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT 
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER 
SERVICE OFFICE IN BLACKSBURG.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY 
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED 
ROADWAYS.

&&

LAT...LON 3681 8121 3702 8102 3681 8076 3658 8111
      3665 8122
TIME...MOT...LOC 1935Z 244DEG 13KT 3681 8111 

$$

2 follow-up statements

822 
WWUS51 KRNK 031956
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
356 PM EDT THU MAY 3 2012

VAC035-077-197-032030-
/O.CON.KRNK.SV.W.0089.000000T0000Z-120503T2030Z/
GRAYSON VA-CARROLL VA-WYTHE VA-
356 PM EDT THU MAY 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM 
EDT FOR 
GRAYSON...NORTHWESTERN CARROLL AND WYTHE COUNTIES...

AT 353 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE 
THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING 
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM CRIPPLE CREEK TO SPRING VALLEY...OR ALONG A LINE 
EXTENDING FROM 6 MILES NORTHEAST OF SPEEDWELL TO FRIES...MOVING 
NORTHEAST AT 10 MPH. 

LOCATIONS IMPACTED INCLUDE...
WYTHEVILLE...SPEEDWELL...INDEPENDENCE...FRIES...COLEMAN STORE...
CRIPPLE CREEK...ELK CREEK...SPRING VALLEY...BYLLESBY AND IVANHOE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...


TO REPORT SEVERE 
WEATHER...CALL...1...866...215...4324.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY 
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED 
ROADWAYS.

&&

LAT...LON 3681 8121 3702 8102 3681 8076 3658 8111
      3665 8122
TIME...MOT...LOC 1953Z 228DEG 8KT 3685 8106 3672 8103 

$$

881 
WWUS51 KRNK 032029
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
429 PM EDT THU MAY 3 2012

VAC197-035-077-032040-
/O.EXP.KRNK.SV.W.0089.000000T0000Z-120503T2030Z/
GRAYSON VA-CARROLL VA-WYTHE VA-
429 PM EDT THU MAY 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR 
GRAYSON...NORTHWESTERN CARROLL AND WYTHE 
COUNTIES WILL EXPIRE AT 430 PM EDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA. THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. 

LAT...LON 3681 8121 3702 8102 3681 8076 3658 8111
      3665 8122
TIME...MOT...LOC 2028Z 244DEG 13KT 3685 8106 3672 8103 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 1:11 PM EDT	Special Weather Statement	RNK	Grayson	34 min
May 3, 1:51 PM EDT	Special Weather Statement	RNK	Grayson	39 min
May 3, 2:54 PM EDT	Severe Thunderstorm Warning	RNK	Grayson	36 min
May 3, 3:19 PM EDT	Special Weather Statement	RNK	Floyd	26 min
May 3, 3:28 PM EDT	Special Weather Statement	RNK	Wythe	32 min
May 3, 3:41 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd	34 min
May 3, 3:43 PM EDT	Special Weather Statement	RNK	Pulaski	32 min
May 3, 4:10 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Giles, Pulaski	65 min
May 3, 4:14 PM EDT	Special Weather Statement	RNK	Floyd	31 min
May 3, 4:28 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Montgomery, Pulaski, Wythe, City of Radford	51 min
May 3, 4:36 PM EDT	Severe Thunderstorm Warning	RNK	Giles	39 min
May 3, 5:15 PM EDT	Special Weather Statement	RNK	Floyd	30 min
May 3, 6:28 PM EDT	Special Weather Statement	RNK	Franklin	32 min
May 3, 6:32 PM EDT	Special Weather Statement	RNK	Botetourt	28 min
May 3, 6:41 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Franklin, Pittsylvania	48 min
May 3, 6:48 PM EDT	Special Weather Statement	RNK	Botetourt	27 min
May 3, 6:52 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Amherst, Botetourt, Rockbridge, City of Buena Vista, City of Lexington	28 min
May 3, 7:02 PM EDT	Special Weather Statement	RNK	Bedford	28 min
May 3, 7:57 PM EDT	Special Weather Statement	RNK	Pittsylvania	33 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.