Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 82, NWS Blacksburg, VA

May 1, 2012Yadkin County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at May 1, 2012, 5:01 PM EDT for Yadkin County, North Carolina. It was in force for 29 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 1, 2012, 5:01 PM EDT (21:01 UTC)
Expired: May 1, 2012, 5:30 PM EDT
In force: 29 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

County Yadkin County, NC

The radar

The Roanoke radar (KFCX), 106 km from the middle of the area, began a volume at 21:01 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, 5:12 PM EDT	HAIL 1	5 Se Yadkinville, NC	EMPLOYEE AT COURTNEY ELEMENTARY SCHOOL REPORTED QUARTER SIZE HAIL

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, 9.0 hours before the alert went out and 61 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.

309 
WUUS51 KRNK 012101
SVRRNK
NCC197-012130-
/O.NEW.KRNK.SV.W.0082.120501T2101Z-120501T2130Z/

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

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN YADKIN COUNTY IN NORTHWEST NORTH CAROLINA

* UNTIL 530 PM EDT.

* AT 458 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
  PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED NEAR LONE
  HICKORY...OR NEAR YADKINVILLE...AND MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LONE HICKORY...
  COURTNEY...
  SHACKTOWN...
  HUNTSVILLE...
  ENON...

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.

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

&&

LAT...LON 3605 8079 3616 8078 3616 8044 3614 8044
      3611 8046 3611 8049 3609 8051 3604 8050
TIME...MOT...LOC 2102Z 274DEG 19KT 3606 8067

$$

1 follow-up statement

883 
WWUS51 KRNK 012128
SVSRNK

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

NCC197-012138-
/O.EXP.KRNK.SV.W.0082.000000T0000Z-120501T2130Z/
YADKIN NC-
528 PM EDT TUE MAY 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN YADKIN COUNTY WILL 
BE ALLOWED TO EXPIRE AT 530 PM EDT...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED BELOW 
SEVERE LIMITS AND MOVED OUT OF THE COUNTY. 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 8079 3616 8078 3616 8044 3614 8044
      3611 8046 3611 8049 3609 8051 3604 8050
TIME...MOT...LOC 2128Z 274DEG 19KT 3605 8050

$$

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, 10:03 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, 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, 5:22 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.