Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 45, NWS Blacksburg, VA

March 24, 2012Stokes County, Surry County, Yadkin County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Mar 24, 2012, 4:31 PM EDT for Stokes County, Surry County, Yadkin County, North Carolina. It was in force for 44 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: Mar 24, 2012, 4:31 PM EDT (20:31 UTC)
Expired: Mar 24, 2012, 5:15 PM EDT
In force: 44 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Stokes County, NC, Surry County, NC, Yadkin County, NC

The radar

The Roanoke radar (KFCX), 94 km from the middle of the area, began a volume at 20:34 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
Mar 24, 4:35 PM EDT	HAIL 0.88	1 Se Union Cross, NC

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
Mar 24, 12:46 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Mar 24, 3:38 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.5 hours before the alert went out and 52 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: 226 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 526 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

542 
WUUS51 KRNK 242031
SVRRNK
NCC169-171-197-242130-
/O.NEW.KRNK.SV.W.0045.120324T2031Z-120324T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
431 PM EDT SAT MAR 24 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN YADKIN COUNTY IN NORTHWEST NORTH CAROLINA
  SOUTHERN STOKES COUNTY IN NORTH CENTRAL NORTH CAROLINA
  SOUTHEASTERN SURRY COUNTY IN NORTH CENTRAL NORTH CAROLINA

* UNTIL 530 PM EDT.

* AT 429 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL. 
  THIS STORM WAS LOCATED NEAR SHACKTOWN...OR NEAR YADKINVILLE...AND
  MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SHACKTOWN...
  EAST BEND...
  PILOT MOUNTAIN STATE PARK...
  PINNACLE...

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A SEVERE
THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM EDT SATURDAY
EVENING FOR NORTHWEST NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A
SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR WEST CENTRAL VIRGINIA AND SOUTHEAST WEST
VIRGINIA.

&&

LAT...LON 3613 8074 3646 8045 3636 8006 3625 8020
      3626 8044 3624 8044 3623 8043 3614 8044
      3611 8046 3610 8050 3604 8050 3604 8056
TIME...MOT...LOC 2030Z 215DEG 16KT 3613 8061

$$

PEM

2 follow-up statements

777 
WWUS51 KRNK 242055
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
455 PM EDT SAT MAR 24 2012

NCC169-171-197-242130-
/O.CON.KRNK.SV.W.0045.000000T0000Z-120324T2130Z/
YADKIN NC-STOKES NC-SURRY NC-
455 PM EDT SAT MAR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHEASTERN YADKIN...SOUTHERN STOKES AND SOUTHEASTERN SURRY
COUNTIES...

AT 451 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR EAST
BEND...MOVING NORTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  PILOT MOUNTAIN STATE PARK...
  KING...
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING 
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. 

&&

LAT...LON 3614 8044 3627 8062 3646 8045 3636 8006
      3625 8020 3626 8044 3624 8044 3623 8043
TIME...MOT...LOC 2054Z 215DEG 16KT 3623 8047

$$

268 
WWUS51 KRNK 242115
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
515 PM EDT SAT MAR 24 2012

NCC169-171-197-242125-
/O.CAN.KRNK.SV.W.0045.000000T0000Z-120324T2130Z/
YADKIN NC-STOKES NC-SURRY NC-
515 PM EDT SAT MAR 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN YADKIN...SOUTHERN
STOKES AND SOUTHEASTERN SURRY COUNTIES IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A SEVERE
THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM EDT SATURDAY
EVENING FOR NORTHWEST NORTH CAROLINA AND SOUTHWESTERN VIRGINIA. A
SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR WEST CENTRAL VIRGINIA AND SOUTHEAST WEST
VIRGINIA.

LAT...LON 3614 8044 3627 8062 3646 8045 3636 8006
      3625 8020 3626 8044 3624 8044 3623 8043
TIME...MOT...LOC 2115Z 215DEG 16KT 3631 8040

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 24, 12:24 PM EDT	Special Weather Statement	RNK	Alleghany	51 min
Mar 24, 12:43 PM EDT	Special Weather Statement	RNK	Wilkes	47 min
Mar 24, 12:48 PM EDT	Special Weather Statement	RNK	Stokes	42 min
Mar 24, 1:30 PM EDT	Severe Thunderstorm Warning	RNK	Ashe	60 min
Mar 24, 2:00 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry	60 min
Mar 24, 2:34 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe	56 min
Mar 24, 2:34 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry, Wilkes	56 min
Mar 24, 2:44 PM EDT	Severe Thunderstorm Warning	RNK	Surry	61 min
Mar 24, 2:52 PM EDT	Flash Flood Warning	RNK	Surry	6 hr
Mar 24, 3:26 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Surry	64 min
Mar 24, 4:08 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry, Wilkes, Yadkin	67 min
Mar 24, 5:35 PM EDT	Severe Thunderstorm Warning	RNK	Surry	55 min
Mar 24, 6:05 PM EDT	Flash Flood Warning	RNK	Surry	4 hr
Mar 24, 6:07 PM EDT	Severe Thunderstorm Warning	RNK	Stokes	53 min
Mar 24, 6:16 PM EDT	Special Weather Statement	RNK	Alleghany	29 min
Mar 24, 6:45 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	60 min
Mar 24, 7:39 PM EDT	Severe Thunderstorm Warning	RNK	Caswell	81 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.