Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 79, NWS Blacksburg, VA

May 1, 2012Wilkes County, Yadkin County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at May 1, 2012, 3:47 PM EDT for Wilkes County, Yadkin County, North Carolina. It was in force for 58 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 1, 2012, 3:47 PM EDT (19:47 UTC)
Expired: May 1, 2012, 4:45 PM EDT
In force: 58 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Wilkes County, NC, Yadkin County, NC

The radar

The Roanoke radar (KFCX), 118 km from the middle of the area, began a volume at 19:47 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 1, 4:11 PM EDT	HAIL 1	5 S Ronda, NC	QUARTER SIZE HAIL REPORTED BY AN AMBULANCE TRAVELING ON US ROUTE 421 SOUTH OF RONDA
May 1, 4:35 PM EDT	TSTM WND DMG	3 Se Buck Shoals, NC	SMALL TREE SPLIT AND FELL IN THE BROOKS CROSSROADS AREA

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 1, 3:12 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.8 hours before the alert went out and 94 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: 6 J/kg
Mixed-layer CIN: -386 J/kg
Mixed-layer LCL: 1318 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

661 
WUUS51 KRNK 011947
SVRRNK
NCC193-197-012045-
/O.NEW.KRNK.SV.W.0079.120501T1947Z-120501T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
347 PM EDT TUE MAY 1 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN YADKIN COUNTY IN NORTHWEST NORTH CAROLINA
  SOUTHEASTERN WILKES COUNTY IN NORTHWEST NORTH CAROLINA

* UNTIL 445 PM EDT.

* AT 343 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 NORTH WILKESBORO...AND MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WINDY GAP...
  CLINGMAN...
  SWANCREEK...
  BROOKS CROSSROADS...

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3605 8099 3604 8101 3610 8117 3622 8114
      3625 8066 3604 8067
TIME...MOT...LOC 1947Z 269DEG 16KT 3614 8105

$$

4 follow-up statements

334 
WWUS51 KRNK 012006
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
406 PM EDT TUE MAY 1 2012

NCC193-197-012045-
/O.CON.KRNK.SV.W.0079.000000T0000Z-120501T2045Z/
YADKIN NC-WILKES NC-
406 PM EDT TUE MAY 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR WESTERN YADKIN AND SOUTHEASTERN WILKES COUNTIES...

AT 401 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 WINDY GAP...OR 6 MILES SOUTH OF RONDA...MOVING EAST AT
20 MPH.

LOCATIONS IMPACTED INCLUDE...
  WINDY GAP...
  CLINGMAN...
  SWANCREEK...
  BUCK SHOALS...
  BROOKS CROSSROADS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3605 8099 3604 8101 3612 8111 3620 8099
      3625 8066 3604 8067
TIME...MOT...LOC 2006Z 269DEG 16KT 3614 8095

$$

221 
WWUS51 KRNK 012022
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
422 PM EDT TUE MAY 1 2012

NCC193-197-012045-
/O.CON.KRNK.SV.W.0079.000000T0000Z-120501T2045Z/
YADKIN NC-WILKES NC-
422 PM EDT TUE MAY 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR WESTERN YADKIN AND SOUTHEASTERN WILKES COUNTIES...

AT 420 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 BUCK SHOALS...OR 8 MILES SOUTHEAST OF RONDA...MOVING
EAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  SWANCREEK...
  BUCK SHOALS...
  BROOKS CROSSROADS...
  LONE HICKORY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3605 8099 3604 8101 3615 8096 3621 8091
      3625 8066 3604 8067
TIME...MOT...LOC 2022Z 270DEG 22KT 3612 8087

$$

195 
WWUS51 KRNK 012037
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
437 PM EDT TUE MAY 1 2012

NCC193-012047-
/O.CAN.KRNK.SV.W.0079.000000T0000Z-120501T2045Z/
WILKES NC-
437 PM EDT TUE MAY 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WILKES COUNTY IS
CANCELLED...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3605 8070 3605 8075 3606 8088 3615 8088
      3617 8067 3604 8067 3604 8069
TIME...MOT...LOC 2037Z 277DEG 21KT 3608 8078

$$

NCC197-012045-
/O.CON.KRNK.SV.W.0079.000000T0000Z-120501T2045Z/
YADKIN NC-
437 PM EDT TUE MAY 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHWESTERN YADKIN COUNTY...

AT 434 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 BUCK SHOALS...OR 8 MILES WEST OF YADKINVILLE...MOVING
EAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  BROOKS CROSSROADS...
  LONE HICKORY...

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

&&

LAT...LON 3605 8070 3605 8075 3606 8088 3615 8088
      3617 8067 3604 8067 3604 8069
TIME...MOT...LOC 2037Z 277DEG 21KT 3608 8078

$$

692 
WWUS51 KRNK 012047
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
447 PM EDT TUE MAY 1 2012

NCC197-012057-
/O.EXP.KRNK.SV.W.0079.000000T0000Z-120501T2045Z/
YADKIN NC-
447 PM EDT TUE MAY 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN YADKIN COUNTY
EXPIRES AT 445 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN
VIRGINIA.

LAT...LON 3605 8070 3605 8075 3606 8088 3615 8088
      3617 8067 3604 8067 3604 8069
TIME...MOT...LOC 2037Z 277DEG 21KT 3608 8078

$$

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, 10:03 PM EDT	Severe Thunderstorm Warning	RNK	Surry, Wilkes	42 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, 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.