Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 261, NWS Blacksburg, VA

July 9, 2012Caswell County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 9, 2012, 6:29 PM EDT for Caswell County, North Carolina. It was in force for 61 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: Jul 9, 2012, 6:29 PM EDT (22:29 UTC)
Expired: Jul 9, 2012, 7:30 PM EDT
In force: 61 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

County Caswell County, NC

The radar

The Raleigh/Durham radar (KRAX), 101 km from the middle of the area, began a volume at 22:32 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
Jul 9, 6:30 PM EDT	TSTM WND DMG	3 Ese Yanceyville, NC	TREE DOWN OFF ROUTE 86
Jul 9, 6:55 PM EDT	TSTM WND DMG	5 Nne Jericho, NC	TREE DOWN OFF ROUTE 62 SOUTH

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
Jul 9, 3:19 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.5 hours before the alert went out and 63 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: 1054 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1186 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

305 
WUUS51 KRNK 092229
SVRRNK
NCC033-092330-
/O.NEW.KRNK.SV.W.0261.120709T2229Z-120709T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
629 PM EDT MON JUL 9 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CASWELL COUNTY IN NORTH CENTRAL NORTH CAROLINA

* UNTIL 730 PM EDT.

* AT 625 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
  HIGHTOWERS...OR 7 MILES SOUTHEAST OF YANCEYVILLE...AND MOVING
  NORTHEAST AT 5 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HIGHTOWERS...
  LEASBURG...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...EXCESSIVE 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 MONDAY
EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA.

&&

LAT...LON 3625 7946 3639 7931 3647 7914 3647 7913
      3629 7914 3625 7915 3624 7916 3624 7946
TIME...MOT...LOC 2228Z 222DEG 6KT 3635 7924

$$

RAB

2 follow-up statements

116 
WUUS51 KRNK 092232 CCA
SVRRNK
NCC033-092330-
/O.COR.KRNK.SV.W.0261.120709T2229Z-120709T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED
NATIONAL WEATHER SERVICE BLACKSBURG VA
629 PM EDT MON JUL 9 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CASWELL COUNTY IN NORTH CENTRAL NORTH CAROLINA

* UNTIL 730 PM EDT.

* AT 625 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM LEASBURG...TO 
  HIGHTOWERS...TO JERICHO...MOVING NORTHEAST AT 5 MPH.  THESE
  THUNDERSTORMS WILL BE CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS UP TO 60 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HIGHTOWERS...
  LEASBURG...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...EXCESSIVE 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 MONDAY
EVENING FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA.

&&

LAT...LON 3625 7946 3639 7931 3647 7914 3647 7913
      3629 7914 3625 7915 3624 7916 3624 7946
TIME...MOT...LOC 2228Z 222DEG 6KT 3635 7924

$$

RAB

586 
WWUS51 KRNK 092303
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
703 PM EDT MON JUL 9 2012

NCC033-092330-
/O.CON.KRNK.SV.W.0261.000000T0000Z-120709T2330Z/
CASWELL NC-
703 PM EDT MON JUL 9 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHEASTERN CASWELL COUNTY...

AT 659 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SEVERE THUNDERSTORMS FROM NEAR YANCEYVILLE TO TO CAMP 
SPRINGS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN 
EXCESS OF 60 MPH. THESE STORMS WERE MOVING NORTHEAST AT 5 MPH.

LOCATIONS IMPACTED INCLUDE...
  TOPNOT...
  LEASBURG...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3625 7946 3639 7931 3647 7914 3647 7913
      3629 7914 3625 7915 3624 7916 3624 7946
TIME...MOT...LOC 2301Z 222DEG 6KT 3639 7919

$$



RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 9:11 PM EDT	Special Weather Statement	RNK	Alleghany	34 min
Jul 8, 9:31 PM EDT	Special Weather Statement	RNK	Watauga	44 min
Jul 8, 11:17 PM EDT	Special Weather Statement	RNK	Alleghany, Surry	58 min
Jul 9, 12:19 AM EDT	Special Weather Statement	RNK	Wilkes	26 min
Jul 9, 12:20 AM EDT	Special Weather Statement	RNK	Surry	25 min
Jul 9, 12:46 AM EDT	Special Weather Statement	RNK	Wilkes	29 min
Jul 9, 12:47 AM EDT	Special Weather Statement	RNK	Surry	58 min
Jul 9, 1:14 AM EDT	Special Weather Statement	RNK	Yadkin	31 min
Jul 9, 1:15 AM EDT	Special Weather Statement	RNK	Surry	30 min
Jul 9, 4:55 PM EDT	Special Weather Statement	RNK	Yadkin	65 min
Jul 9, 5:49 PM EDT	Special Weather Statement	RNK	Caswell	56 min
Jul 9, 7:14 PM EDT	Areal Flood Advisory	RNK	Caswell	106 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.