Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 5, NWS Raleigh, NC

February 24, 2012Forsyth County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Feb 24, 2012, 2:58 PM EST for Forsyth County, North Carolina. It was in force for 47 min. 4 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: Feb 24, 2012, 2:58 PM EST (19:58 UTC)
Expired: Feb 24, 2012, 3:45 PM EST
In force: 47 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

County Forsyth County, NC

The radar

The Roanoke radar (KFCX), 106 km from the middle of the area, began a volume at 20:01 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
Feb 24, 3:23 PM EST	TSTM WND DMG	2 Ssw Lewisville, NC	TREES DOWN AT 6868 STYERS FERRY RD.
Feb 24, 3:31 PM EST	TSTM WND DMG	4 Nw High Point, NC	TREE DOWN AT THE INTERSECTION OF BARNEY HALL RD AND HIGH POINT RD.
Feb 24, 3:35 PM EST	TSTM WND DMG	1 Se Winston-Salem, NC	ONE TREE DOWN ON INTERSTATE BUSINESS 40.
Feb 24, 3:49 PM EST	TSTM WND DMG	Donnaha, NC	TREES DOWN AT THE INTERSECTION OF 7154 MARTIN FERRY RD. AND DONNAHA RD.

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
Feb 24, 1:19 PM EST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.0 hours before the alert went out and 42 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: 150 J/kg
Mixed-layer CIN: -118 J/kg
Mixed-layer LCL: 742 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 271 m²/s²
0-3 km storm-relative helicity: 345 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

697 
WUUS52 KRAH 241958
SVRRAH
NCC067-242045-
/O.NEW.KRAH.SV.W.0005.120224T1958Z-120224T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
258 PM EST FRI FEB 24 2012

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FORSYTH COUNTY IN CENTRAL NORTH CAROLINA

* UNTIL 345 PM EST

* AT 255 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES SOUTHWEST OF HUNTSVILLE...OR 7 MILES
  NORTH OF MOCKSVILLE...MOVING NORTHEAST AT 50 MPH. WINDS IN EXCESS
  OF 60 MPH ARE LIKELY WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  HUNTSVILLE...
  LEWISVILLE...CLEMMONS...
  WINSTON-SALEM...PFAFFTOWN...
  SEDGE GARDEN...
  WALKERTOWN...KERNERSVILLE...
  BELEWS CREEK...

THIS INCLUDES INTERSTATE 40 BETWEEN EXITS 182 AND 203.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STRAIGHT LINE WINDS CAN BLOW DOWN TREES...POWER LINES...AND DAMAGE
MOBILE HOMES AND OTHER BUILDINGS. SEEK SHELTER IN A STURDY STRUCTURE
UNTIL THE STORM HAS PASSED. STAY AWAY FROM WINDOWS AS FLYING DEBRIS
GENERATED BY DAMAGING WINDS CAN BE DEADLY.

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING...1...8 7 7...6 3 3...6 7 7 2 OR NOTIFY YOUR LOCAL LAW
ENFORCEMENT AGENCY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EST FRIDAY EVENING FOR
CENTRAL NORTH CAROLINA.

&&

LAT...LON 3611 8051 3614 8044 3625 8045 3626 8003
      3601 8004 3603 8021 3600 8022 3600 8032
      3597 8040 3599 8043 3601 8042 3606 8047
      3604 8048 3605 8051 3609 8052
TIME...MOT...LOC 1957Z 244DEG 43KT 3601 8056

$$

VINCENT

4 follow-up statements

939 
WWUS52 KRAH 242004
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
304 PM EST FRI FEB 24 2012

NCC067-242045-
/O.CON.KRAH.SV.W.0005.000000T0000Z-120224T2045Z/
FORSYTH NC-
304 PM EST FRI FEB 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EST
FOR FORSYTH COUNTY...

AT 300 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR
HUNTSVILLE...OR 9 MILES NORTH OF MOCKSVILLE...MOVING NORTHEAST AT 65
MPH.

HAZARDS IN THE WARNING INCLUDE...
DAMAGING WINDS IN EXCESS OF 60 MPH.

LOCATIONS IN THE PATH OF THE STORM INCLUDE... CLEMMONS...
LEWISVILLE...DONNAHA...PFAFFTOWN...WINSTON-SALEM...RURAL HALL...
STANLEYVILLE...SEDGE GARDEN...WALKERTOWN...KERNERSVILLE AND BELEWS
CREEK.

THIS INCLUDES INTERSTATE 40 BETWEEN EXITS 182 AND 203.

STRAIGHT LINE WINDS CAN BLOW DOWN TREES...POWER LINES...AND DAMAGE
MOBILE HOMES AND OTHER BUILDINGS. SEEK SHELTER IN A STURDY STRUCTURE
UNTIL THE STORM HAS PASSED. STAY AWAY FROM WINDOWS AS FLYING DEBRIS
GENERATED BY DAMAGING WINDS CAN BE DEADLY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EST FRIDAY EVENING FOR
CENTRAL NORTH CAROLINA.

LAT...LON 3611 8051 3614 8044 3625 8045 3626 8003
      3601 8004 3603 8021 3600 8022 3600 8032
      3597 8040 3599 8043 3601 8042 3606 8047
      3604 8048 3605 8051 3609 8052
TIME...MOT...LOC 2004Z 241DEG 57KT 3606 8045

$$

VINCENT

438 
WWUS52 KRAH 242019
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
319 PM EST FRI FEB 24 2012

NCC067-242045-
/O.CON.KRAH.SV.W.0005.000000T0000Z-120224T2045Z/
FORSYTH NC-
319 PM EST FRI FEB 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EST
FOR FORSYTH COUNTY...

AT 314 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
ANOTHER SEVERE THUNDERSTORM APPROACHING FORSYTH COUNTY FROM THE 
WEST.  THIS STORM WAS LOCATED NEAR HUNTSVILLE...OR 9 MILES SOUTH OF 
EAST BEND...MOVING EAST AT 70 MPH.

HAZARDS IN THE WARNING INCLUDE...
DAMAGING WINDS IN EXCESS OF 60 MPH.

LOCATIONS IN THE PATH OF THE STORM INCLUDE... CLEMMONS...
LEWISVILLE...DONNAHA...PFAFFTOWN...WINSTON-SALEM...RURAL HALL...
STANLEYVILLE...SEDGE GARDEN...WALKERTOWN...KERNERSVILLE AND BELEWS 
CREEK.

THIS INCLUDES INTERSTATE 40 BETWEEN EXITS 182 AND 203.

ADDITIONAL THUNDERSTORMS DEVELOPING OVER FORSYTH COUNTY WILL ALSO BE 
CAPABLE OF PRODUCING DAMAGING WINDS.

STRAIGHT LINE WINDS CAN BLOW DOWN TREES...POWER LINES...AND DAMAGE
MOBILE HOMES AND OTHER BUILDINGS. SEEK SHELTER IN A STURDY STRUCTURE
UNTIL THE STORM HAS PASSED. STAY AWAY FROM WINDOWS AS FLYING DEBRIS
GENERATED BY DAMAGING WINDS CAN BE DEADLY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EST FRIDAY EVENING FOR
CENTRAL NORTH CAROLINA.

LAT...LON 3611 8051 3614 8044 3625 8045 3626 8003
      3601 8004 3603 8021 3600 8022 3600 8032
      3597 8040 3599 8043 3601 8042 3606 8047
      3604 8048 3605 8051 3609 8052
TIME...MOT...LOC 2017Z 253DEG 59KT 3611 8051

$$

VINCENT

427 
WWUS52 KRAH 242037
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
337 PM EST FRI FEB 24 2012

NCC067-242045-
/O.CON.KRAH.SV.W.0005.000000T0000Z-120224T2045Z/
FORSYTH NC-
337 PM EST FRI FEB 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EST
FOR FORSYTH COUNTY...

AT 332 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR
WINSTON-SALEM...MOVING EAST AT 70 MPH.

HAZARDS IN THE WARNING INCLUDE...
DAMAGING WINDS IN EXCESS OF 60 MPH.

LOCATIONS IN THE PATH OF THE STORM INCLUDE...KERNERSVILLE AND BELEWS 
CREEK.

THIS INCLUDES INTERSTATE 40 BETWEEN EXITS 182 AND 203.

STRAIGHT LINE WINDS CAN BLOW DOWN TREES...POWER LINES...AND DAMAGE
MOBILE HOMES AND OTHER BUILDINGS. SEEK SHELTER IN A STURDY STRUCTURE
UNTIL THE STORM HAS PASSED. STAY AWAY FROM WINDOWS AS FLYING DEBRIS
GENERATED BY DAMAGING WINDS CAN BE DEADLY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EST FRIDAY EVENING FOR
CENTRAL NORTH CAROLINA.

LAT...LON 3614 8044 3625 8031 3626 8003 3601 8004
      3603 8021 3600 8022 3600 8032 3597 8040
      3599 8043 3601 8042 3606 8047 3604 8048
      3605 8051
TIME...MOT...LOC 2037Z 261DEG 60KT 3614 8016

$$

VINCENT

415 
WWUS52 KRAH 242043
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
343 PM EST FRI FEB 24 2012

NCC067-242052-
/O.EXP.KRAH.SV.W.0005.000000T0000Z-120224T2045Z/
FORSYTH NC-
343 PM EST FRI FEB 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN AND NORTHWESTERN 
FORSYTH COUNTY EXPIRES AT 345 PM EST...

HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 
PM FOR EASTERN FORSYTH COUNTY AND GUILFORD COUNTY.

IF YOU OBSERVED SEVERE WEATHER INCLUDING DAMAGING WINDS OR LARGE
HAIL...PLEASE CONTACT THE NATIONAL WEATHER SERVICE BY CALLING TOLL
FREE 1...8 7 7...6 3 3...6 7 7 2...OR NOTIFY YOUR NEAREST LAW
ENFORCEMENT AGENCY AND ASK THEM TO RELAY YOUR REPORT TO THE NATIONAL
WEATHER SERVICE FORECAST OFFICE IN RALEIGH.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EST FRIDAY EVENING FOR
CENTRAL NORTH CAROLINA.

LAT...LON 3614 8044 3625 8031 3626 8003 3601 8004
      3603 8021 3600 8022 3600 8032 3597 8040
      3599 8043 3601 8042 3606 8047 3604 8048
      3605 8051
TIME...MOT...LOC 2042Z 261DEG 60KT 3615 8005

$$

VINCENT

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 24, 12:07 PM EST	Special Weather Statement	RAH	Cumberland, Hoke, Sampson, Scotland, Wayne	53 min
Feb 24, 1:24 PM EST	Special Weather Statement	RAH	Sampson	51 min
Feb 24, 2:08 PM EST	Fire Weather Watch	RAH	Alamance, Davidson, Forsyth, Guilford, Person, Randolph and 1 more	16 hr
Feb 24, 2:26 PM EST	Special Weather Statement	RAH	Sampson	64 min
Feb 24, 2:37 PM EST	Special Weather Statement	RAH	Forsyth	53 min
Feb 24, 3:15 PM EST	Severe Thunderstorm Warning	RAH	Davidson	60 min
Feb 24, 3:35 PM EST	Severe Thunderstorm Warning	RAH	Forsyth, Guilford	55 min
Feb 24, 3:49 PM EST	Severe Thunderstorm Warning	RAH	Randolph	56 min
Feb 24, 4:10 PM EST	Severe Thunderstorm Warning	RAH	Alamance, Orange, Person	65 min
Feb 24, 4:16 PM EST	Severe Thunderstorm Warning	RAH	Davidson, Montgomery, Stanly	49 min
Feb 24, 4:34 PM EST	Severe Thunderstorm Warning	RAH	Chatham, Randolph	56 min
Feb 24, 4:36 PM EST	Special Weather Statement	RAH	Chatham, Durham, Franklin, Granville, Harnett, Lee and 4 more	84 min
Feb 24, 4:42 PM EST	Severe Thunderstorm Warning	RAH	Durham, Granville, Vance	63 min
Feb 24, 5:04 PM EST	Severe Thunderstorm Warning	RAH	Franklin, Wake, Warren	56 min
Feb 24, 5:31 PM EST	Special Weather Statement	RAH	Edgecombe, Halifax, Nash	89 min
Feb 24, 5:38 PM EST	Severe Thunderstorm Warning	RAH	Halifax, Warren	37 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.