Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 71, NWS Blacksburg, VA

April 30, 2012Surry County, Wilkes County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Apr 30, 2012, 10:03 PM EDT for Surry County, Wilkes County, North Carolina. It was in force for 42 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: Apr 30, 2012, 10:03 PM EDT (02:03 UTC)
Expired: Apr 30, 2012, 10:45 PM EDT
In force: 42 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Surry County, NC, Wilkes County, NC

The radar

The Roanoke radar (KFCX), 95 km from the middle of the area, began a volume at 02:05 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 30, 10:05 PM EDT	HAIL 1.75	3 Se Traphill, NC	QUARTER TO GOLF BALL SIZE HAIL ON HANKS STREET

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 00:00Z, 2.1 hours before the alert went out and 86 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: 1300 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1016 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

837 
WUUS51 KRNK 010203
SVRRNK
NCC171-193-010245-
/O.NEW.KRNK.SV.W.0071.120501T0203Z-120501T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
1003 PM EDT MON APR 30 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SURRY COUNTY IN NORTH CENTRAL NORTH CAROLINA
  NORTHEASTERN WILKES COUNTY IN NORTHWEST NORTH CAROLINA

* UNTIL 1045 PM EDT.

* AT 1000 PM EDT...NATIONAL WEATHER SERVICE 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
  BENHAM...OR NEAR RONDA...AND MOVING NORTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BENHAM...
  STATE ROAD...
  FAIRVIEW...
  DOBSON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...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.

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 3634 8107 3653 8068 3632 8054 3626 8072
      3628 8074 3627 8076 3628 8077 3625 8079
      3626 8081 3624 8087 3621 8087 3618 8097
TIME...MOT...LOC 0203Z 243DEG 21KT 3629 8095

$$

RAB

2 follow-up statements

972 
WWUS51 KRNK 010239
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1039 PM EDT MON APR 30 2012

NCC171-193-010245-
/O.CON.KRNK.SV.W.0071.000000T0000Z-120501T0245Z/
SURRY NC-WILKES NC-
1039 PM EDT MON APR 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR SURRY AND NORTHEASTERN WILKES COUNTIES...

AT 1032 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SEVERE THUNDERSTORMS ACROSS NORTHEAST WILKES AND CENTRAL 
SURRY COUNTY BETWEEN MOUNT AIRY AND PINE RIDGE...AND JUST SOUTHEAST 
OF TRAPHILL. BOTH OF THESE STORMS ARE CAPABLE OF PRODUCING QUARTER 
SIZE HAIL. THE STORMS ARE MOVING NORTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  FAIRVIEW...
  DOBSON...
  WHITE PLAINS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

LAT...LON 3634 8107 3653 8068 3632 8054 3626 8071
      3628 8074 3627 8076 3628 8077 3625 8079
      3626 8087 3621 8087 3618 8097
TIME...MOT...LOC 0236Z 243DEG 21KT 3638 8074

$$

RAB

792 
WWUS51 KRNK 010241 CCA
SVSRNK

SEVERE WEATHER STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE BLACKSBURG VA
1039 PM EDT MON APR 30 2012

NCC171-193-010245-
/O.COR.KRNK.SV.W.0071.000000T0000Z-120501T0245Z/
SURRY NC-WILKES NC-
1039 PM EDT MON APR 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR SURRY AND NORTHEASTERN WILKES COUNTIES...

AT 1032 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SEVERE THUNDERSTORMS ACROSS NORTHEAST WILKES AND CENTRAL 
SURRY COUNTY BETWEEN MOUNT AIRY AND PINE RIDGE...AND JUST SOUTHEAST 
OF TRAPHILL. BOTH OF THESE STORMS ARE CAPABLE OF PRODUCING QUARTER 
SIZE HAIL. THE STORMS ARE MOVING NORTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  FAIRVIEW...
  DOBSON...
  WHITE PLAINS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD-TO-GROUND LIGHTNING CAN BE EXPECTED WITH THESE 
STORMS. MOVE INDOORS AND AWAY FROM DOORS AND WINDOWS UNTIL THE STORM 
HAS PASSED. DO NOT USE ELECTRICAL APPLIANCES OR LANDLINE TELEPHONES 
UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3634 8107 3653 8068 3632 8054 3626 8071
      3628 8074 3627 8076 3628 8077 3625 8079
      3626 8087 3621 8087 3618 8097
TIME...MOT...LOC 0236Z 243DEG 21KT 3638 8074

$$

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 8:06 PM EDT	Special Weather Statement	RNK	Wilkes	54 min
Apr 30, 8:58 PM EDT	Special Weather Statement	RNK	Watauga	62 min
Apr 30, 9:51 PM EDT	Special Weather Statement	RNK	Wilkes	39 min
Apr 30, 10:49 PM EDT	Severe Thunderstorm Warning	RNK	Surry	56 min
Apr 30, 11:24 PM EDT	Special Weather Statement	RNK	Rockingham	51 min
Apr 30, 11:50 PM EDT	Special Weather Statement	RNK	Stokes	40 min
May 1, 12:01 AM EDT	Special Weather Statement	RNK	Stokes	44 min
May 1, 2:30 PM EDT	Special Weather Statement	RNK	Surry	30 min
May 1, 2:37 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	43 min
May 1, 3:18 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	57 min
May 1, 3:40 PM EDT	Special Weather Statement	RNK	Wilkes	35 min
May 1, 3:47 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes, Yadkin	58 min
May 1, 4:11 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry, Yadkin	35 min
May 1, 5:01 PM EDT	Severe Thunderstorm Warning	RNK	Yadkin	29 min
May 1, 5:22 PM EDT	Special Weather Statement	RNK	Caswell	23 min
May 1, 5:44 PM EDT	Special Weather Statement	RNK	Surry	61 min
May 1, 6:18 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	35 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 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.