Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Raleigh, NC

August 19, 201212 counties in North Carolina

NWS Raleigh, NC issued this special weather statement at Aug 19, 2012, 4:26 AM EDT for 12 counties in North Carolina. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 19, 2012, 4:26 AM EDT (08:26 UTC)
Expired
Aug 19, 2012, 6:45 AM EDT
In force
2 hr
Issued by
NWS Raleigh, NC

Counties Alamance County, NC, Chatham County, NC, Durham County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Vance County, NC, Wake County, NC, Warren County, NC

The radar

The Raleigh/Durham radar (KRAX), 59 km from the middle of the area, began a volume at 08:26 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.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 8.4 hours before the alert went out and 84 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 00:00Z on 2012-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 423 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 00:00Z on 2012-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
423 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1122 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

949 
WWUS82 KRAH 190826
SPSRAH

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
426 AM EDT SUN AUG 19 2012

NCZ007>010-021>026-038>041-191045-
ALAMANCE-CHATHAM-DAVIDSON-DURHAM-FORSYTH-FRANKLIN-GRANVILLE-GUILFORD-
ORANGE-PERSON-RANDOLPH-VANCE-WAKE-WARREN-
426 AM EDT SUN AUG 19 2012

...THUNDERSTORMS WITH VERY HEAVY RAIN OVER PORTIONS OF THE NORTHWEST 
AND NORTHEAST PIEDMONT...
 
AT 424 AM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY 
HEAVY RAIN EXTENDING FROM THE GREENSBORO AIRPORT TO ASHEBORO... EAST 
THROUGH BURLINGTON AND HAW RIVER... MOVING NORTHEAST AT 35 MPH.

LOCATIONS IN THE PATH OF THESE STORMS INCLUDE GREENSBORO... 
RANDLEMAN... CLIMAX... ELON... BURLINGTON... HILLSBOROUGH... 
ROXBORO. THIS WILL INCLUDE MUCH OF NORTHERN RANDOLPH... GUILFORD... 
ALAMANCE... NORTHERN ORANGE... AND PERSON COUNTIES. 

IN ADDITION... SCATTERED STRONG THUNDERSTORMS WERE DEVELOPING OVER 
WESTERN WAKE COUNTY.. MOVING NORTH AT 25 MPH. THESE STORMS MAY 
AFFECT THE RDU AIRPORT AND DURHAM. 

HAZARDS INCLUDE...
GUSTY WINDS OF 30 TO 40 MPH.
HEAVY RAINFALL AND MINOR FLOODING.

THESE STORMS WILL PRODUCE HEAVY RAINFALL...WHICH WILL CAUSE MINOR 
FLOODING OF LOW LYING AREAS INCLUDING DITCHES...CREEKS...ROADWAYS AND
AREAS OF POOR DRAINAGE. AVOID THESE AREAS AND DO NOT CROSS FLOODED 
ROADS. MOTORISTS SHOULD ALSO REDUCE DRIVING SPEEDS TO AVOID 
HYDROPLANING.

&&

LAT...LON 3654 7789 3630 7794 3582 7825 3557 7865
      3558 7892 3555 7903 3563 7912 3554 7926
      3551 8005 3623 8015 3627 8003 3625 7916
      3652 7914 3655 7903
TIME...MOT...LOC 0821Z 232DEG 30KT 3613 7927

$$

BADGETT

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 8:34 PM EDTSpecial Weather StatementRAHWayne11 min
Aug 19, 4:49 AM EDTAreal Flood AdvisoryRAHAlamance, Guilford, Orange, Randolph3 hr
Aug 19, 6:04 AM EDTSpecial Weather StatementRAHAlamance, Chatham, Durham, Franklin, Granville, Guilford and 6 more116 min
Aug 19, 6:58 AM EDTSpecial Weather StatementRAHChatham, Durham, Franklin, Granville, Orange, Person and 2 more92 min
Aug 19, 7:37 AM EDTAreal Flood AdvisoryRAHGuilford4 hr
Aug 19, 7:40 AM EDTSpecial Weather StatementRAHAnson, Montgomery, Richmond, Stanly65 min
Aug 19, 8:03 AM EDTFlash Flood WarningRAHDurham50 min
Aug 19, 8:24 AM EDTSpecial Weather StatementRAHFranklin, Nash, Vance, Warren51 min
Aug 19, 8:47 AM EDTSpecial Weather StatementRAHAnson, Richmond, Scotland58 min
Aug 19, 8:55 AM EDTSevere Thunderstorm WarningRAHFranklin, Halifax, Nash, Warren65 min
Aug 19, 9:05 AM EDTSevere Thunderstorm WarningRAHHalifax, Warren40 min
Aug 19, 9:09 AM EDTTornado WarningRAHHalifax23 min
Aug 19, 9:20 AM EDTAreal Flood AdvisoryRAHHalifax, Vance, Warren3 hr
Aug 19, 9:25 AM EDTSpecial Weather StatementRAHMontgomery, Moore65 min
Aug 19, 9:41 AM EDTFlash Flood WarningRAHHalifax, Warren2 hr
Aug 19, 9:47 AM EDTSpecial Weather StatementRAHHoke, Richmond, Scotland58 min
Aug 19, 9:47 AM EDTSevere Thunderstorm WarningRAHEdgecombe, Halifax, Nash58 min
Aug 19, 10:28 AM EDTSpecial Weather StatementRAHCumberland, Harnett, Hoke, Lee, Moore62 min
Aug 19, 11:22 AM EDTFlash Flood WarningRAHHalifax, Warren2 hr
Aug 19, 11:26 AM EDTSpecial Weather StatementRAHCumberland, Harnett, Sampson64 min
Aug 19, 11:35 AM EDTAreal Flood AdvisoryRAHWake78 min
Aug 19, 12:26 PM EDTSpecial Weather StatementRAHSampson, Wayne64 min
Aug 19, 7:14 PM EDTSpecial Weather StatementRAHSampson46 min

Nearby

Special Weather Statements in North Carolina, 2012Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.