Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 13, NWS Raleigh, NC

February 24, 2012Franklin County, Wake County, Warren County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Feb 24, 2012, 5:04 PM EST for Franklin County, Wake County, Warren County, North Carolina. It was in force for 56 min. 3 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, 5:04 PM EST (22:04 UTC)
Expired: Feb 24, 2012, 6:00 PM EST
In force: 56 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

Counties Franklin County, NC, Wake County, NC, Warren County, NC

The radar

The Raleigh/Durham radar (KRAX), 44 km from the middle of the area, began a volume at 22:04 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, 5:22 PM EST	TSTM WND GST 46	Rdu International Airpo, NC	RDU AIRPORT GUSTED TO 46 MPH AT 522 PM
Feb 24, 5:25 PM EST	TSTM WND DMG	3 W Lake Gaston, NC	ONE TREE DOWN
Feb 24, 5:45 PM EST	TSTM WND DMG	4 E Cary, NC	ONE TREE DOWN BETWEEN WESTERN BLVD. AND HILLSBOROUGH ST.

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, 10.1 hours before the alert went out and 127 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.

299 
WUUS52 KRAH 242204
SVRRAH
NCC069-183-185-242300-
/O.NEW.KRAH.SV.W.0013.120224T2204Z-120224T2300Z/

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

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FRANKLIN COUNTY IN CENTRAL NORTH CAROLINA
  WAKE COUNTY IN CENTRAL NORTH CAROLINA
  WARREN COUNTY IN CENTRAL NORTH CAROLINA

* UNTIL 600 PM EST

* AT 500 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  SEVERE THUNDERSTORM  ALONG A LINE EXTENDING FROM 16 MILES          
  NORTHWEST OF WARRENTON TO 7 MILES EAST OF SILER CITY...MOVING EAST 
  AT 50 MPH. WINDS IN EXCESS OF 58 MPH ARE LIKELY WITH THIS LINE OF  
  STORMS.

* LOCATIONS IMPACTED INCLUDE...
  DREWRY...
  WISE...NORLINA...
  WARRENTON...RDU INTERNATIONAL AIRPORT...
  PURNELL...NEW HILL...
  FUQUAY-VARINA...YOUNGSVILLE...
  RALEIGH...

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 3654 7789 3631 7794 3582 7825 3571 7847
      3552 7871 3561 7899 3587 7890 3587 7883
      3593 7881 3592 7876 3598 7871 3608 7874
      3602 7855 3618 7850 3616 7842 3627 7830
      3632 7828 3655 7832
TIME...MOT...LOC 2202Z 270DEG 43KT 3656 7834 3573 7930

$$

22

1 follow-up statement

300 
WWUS52 KRAH 242252
SVSRAH

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

NCC069-183-185-242302-
/O.EXP.KRAH.SV.W.0013.000000T0000Z-120224T2300Z/
FRANKLIN NC-WAKE NC-WARREN NC-
552 PM EST FRI FEB 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR WARREN...WAKE AND FRANKLIN
COUNTIES EXPIRES AT 600 PM EST...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND THE WARNING 
WILL BE ALLOWED TO EXPIRE.

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 3654 7789 3631 7794 3582 7825 3571 7847
      3552 7871 3561 7899 3587 7890 3587 7883
      3593 7881 3592 7876 3598 7871 3608 7874
      3602 7855 3618 7850 3616 7842 3627 7830
      3632 7828 3655 7832
TIME...MOT...LOC 2252Z 270DEG 43KT 3638 7780 3568 7873

$$

22

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, 2:58 PM EST	Severe Thunderstorm Warning	RAH	Forsyth	47 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, 5:31 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.