Alert archive / Virginia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 84, NWS Blacksburg, VA

May 2, 2012Henry County, Patrick County, City of Martinsville, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at May 2, 2012, 5:16 PM EDT for Henry County, Patrick County, City of Martinsville, Virginia. It was in force for 59 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: May 2, 2012, 5:16 PM EDT (21:16 UTC)
Expired: May 2, 2012, 6:15 PM EDT
In force: 59 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties City of Martinsville, VA, Henry County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 41 km from the middle of the area, began a volume at 21:18 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 2, 5:26 PM EDT	HAIL 1	4 Wsw Fairy Stone State, VA	QUARTER SIZE HAIL AT 67 CHEVY LANE ALONG ROUTE 57
May 2, 5:35 PM EDT	HAIL 0.88	3 Sw Fairy Stone State, VA	UP TO NICKEL SIZE HAIL COVERING THE GROUND AT THE WESTERN ENTRANCE TO THE FAIRY STONE STATE PARK ON ROUTE 57

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, 9.3 hours before the alert went out and 66 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: 727 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 813 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

522 
WUUS51 KRNK 022116
SVRRNK
VAC089-141-690-022215-
/O.NEW.KRNK.SV.W.0084.120502T2116Z-120502T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
516 PM EDT WED MAY 2 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN PATRICK COUNTY IN SOUTHWEST VIRGINIA
  CITY OF MARTINSVILLE IN SOUTH CENTRAL VIRGINIA
  HENRY COUNTY IN SOUTH CENTRAL VIRGINIA

* UNTIL 615 PM EDT.

* AT 513 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR CHARITY...OR 6 MILES EAST OF WOOLWINE...AND
  MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FAIRY STONE STATE PARK...
  PHILPOTT DAM...
  STANLEYTOWN...
  COLLINSVILLE...
  VILLA HEIGHTS...

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.

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 3670 8025 3685 8021 3683 8007 3678 8003
      3679 8001 3679 8002 3681 8000 3681 7998
      3676 7967 3673 7967 3656 7971 3655 7972
TIME...MOT...LOC 2117Z 280DEG 27KT 3677 8013

$$



RAB

2 follow-up statements

103 
WWUS51 KRNK 022159
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
559 PM EDT WED MAY 2 2012

VAC141-022208-
/O.CAN.KRNK.SV.W.0084.000000T0000Z-120502T2215Z/
PATRICK VA-
559 PM EDT WED MAY 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN PATRICK COUNTY HAS 
BEEN CANCELLED...

THE THUNDERSTORM THAT EARLIER PROMPTED THE WARNING FOR THIS AREA HAS 
WEAKENED. SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS 
THE NORTHERN HALF OF THE COUNTY DURING THE NEXT 30 MINUTES OR 
SO...BUT THE SEVERE THREAT HAS ENDED AT THIS TIME.

&&

LAT...LON 3665 8006 3672 8010 3674 8008 3674 8010
      3678 8009 3679 8006 3679 8002 3681 8000
      3681 7996 3676 7966 3675 7967 3655 7971
TIME...MOT...LOC 2158Z 283DEG 11KT 3674 8005

$$

VAC089-690-022215-
/O.CON.KRNK.SV.W.0084.000000T0000Z-120502T2215Z/
CITY OF MARTINSVILLE VA-HENRY VA-
559 PM EDT WED MAY 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT 
FOR THE CITY OF MARTINSVILLE...HENRY COUNTY...

AT 556 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR SANVILLE...OR NEAR BASSETT...
MOVING EAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  SANVILLE...
  STANLEYTOWN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL...FREQUENT 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.

&&

LAT...LON 3665 8006 3672 8010 3674 8008 3674 8010
      3678 8009 3679 8006 3679 8002 3681 8000
      3681 7996 3676 7966 3675 7967 3655 7971
TIME...MOT...LOC 2158Z 283DEG 11KT 3674 8005

$$



RAB

675 
WWUS51 KRNK 022215
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
615 PM EDT WED MAY 2 2012

VAC089-690-022224-
/O.EXP.KRNK.SV.W.0084.000000T0000Z-120502T2215Z/
CITY OF MARTINSVILLE VA-HENRY VA-
615 PM EDT WED MAY 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR THE CITY OF MARTINSVILLE...
HENRY COUNTY EXPIRES AT 615 PM EDT...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LIMITS. THUS THE WARNING WILL BE ALLOWED TO EXPIRE.

SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE AREA FOR THE NEXT 
HOUR OR SO. SOME OF THESE MAY BECOME STRONG TO SEVERE...BUT THE 
IMMEDIATE THREAT OF SEVERE WEATHER IN HENRY COUNTY AND THE CITY OF 
MARTINSVILLE HAS ENDED.

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 3665 8006 3672 8010 3674 8008 3674 8010
      3678 8009 3679 8006 3679 8002 3681 8000
      3681 7996 3676 7966 3675 7967 3655 7971
TIME...MOT...LOC 2214Z 283DEG 11KT 3673 7999

$$

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 8:00 PM EDT	Special Weather Statement	RNK	Floyd	30 min
May 2, 5:13 PM EDT	Special Weather Statement	RNK	City of Martinsville	62 min
May 2, 6:26 PM EDT	Severe Thunderstorm Warning	RNK	Patrick	26 min
May 2, 6:41 PM EDT	Special Weather Statement	RNK	Bedford	49 min
May 2, 7:03 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	42 min
May 2, 7:09 PM EDT	Special Weather Statement	RNK	Rockbridge	36 min
May 2, 7:46 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	59 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.