Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Raleigh, NC

August 11, 2012Orange County, Person County, North Carolina

NWS Raleigh, NC issued this special weather statement at Aug 11, 2012, 1:33 PM EDT for Orange County, Person County, North Carolina. It was in force for 57 min. 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 11, 2012, 1:33 PM EDT (17:33 UTC)
Expired
Aug 11, 2012, 2:30 PM EDT
In force
57 min
Issued by
NWS Raleigh, NC

Counties Orange County, NC, Person County, NC

The radar

The Raleigh/Durham radar (KRAX), 85 km from the middle of the area, began a volume at 17:33 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 12:00Z, 5.6 hours before the alert went out and 85 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 12:00Z on 2012-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 509 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2012-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.19395878Sfc1 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
509 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
762 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
62 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Raleigh, NC wrote its last area forecast discussion before this special weather statement went out at Aug 11, 10:38 AM EDT, 2 hours 55 minutes earlier.

Area forecast discussion, Aug 11, 10:38 AM EDT, 2 hours 55 minutes before
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Hazardous weather outlook, Aug 11, 7:04 AM EDT, 6 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE RALEIGH NC
704 AM EDT SAT AUG 11 2012

NCZ007>011-021>028-038>043-073>078-083>086-088-089-121115-
PERSON-GRANVILLE-VANCE-WARREN-HALIFAX-FORSYTH-GUILFORD-ALAMANCE-
ORANGE-DURHAM-FRANKLIN-NASH-EDGECOMBE-DAVIDSON-RANDOLPH-CHATHAM-WAKE-
JOHNSTON-WILSON-STANLY-MONTGOMERY-MOORE-LEE-HARNETT-WAYNE-ANSON-
RICHMOND-SCOTLAND-HOKE-CUMBERLAND-SAMPSON-
704 AM EDT SAT AUG 11 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

ISOLATED SEVERE THUNDERSTORMS WITH A PRIMARY THREAT OF DAMAGING
WINDS WILL BE POSSIBLE THIS AFTERNOON INTO TONIGHT AS AN UPPER
LEVEL TROUGH APPROACHES FROM THE WEST. LOCALLY HEAVY RAINFALL CAN
ALSO BE EXPECTED WITH ANY THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

VINCENT

In the hours before

Special weather statement, Aug 11, 12:03 PM EDT, 1 hour 30 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1203 PM EDT SAT AUG 11 2012

NCZ042-043-078-111700-
JOHNSTON-WAYNE-WILSON-
1203 PM EDT SAT AUG 11 2012

...A STRONG THUNDERSTORM WILL MOVE ACROSS WAYNE...JOHNSTON AND WILSON
COUNTIES THROUGH 100 PM EDT...

AT 1203 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
KENLY...OR ABOUT 13 MILES EAST OF SMITHFIELD...MOVING NORTHEAST AT 20
MPH.

SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...LUCAMA...BLACK
CREEK...WILSON.

HAZARDS INCLUDE...
PEA SIZE HAIL.
GUSTY WINDS OF 30 TO 40 MPH.

SEEK SHELTER IN A NEARBY BUILDING OR VEHICLE. STRONG WINDS ARE
CAPABLE OF KNOCKING DOWN SMALL TREES AND BLOWING AROUND TRASH CANS...
POTTED PLANTS...LAWN FURNITURE AND OTHER LIGHT OUTDOOR OBJECTS.

&&

LAT...LON 3559 7779 3544 7811 3558 7829 3581 7799
      3585 7788 3585 7787 3576 7773 3573 7772
      3567 7766
TIME...MOT...LOC 1603Z 224DEG 15KT 3557 7812

KRR
Special weather statement, Aug 11, 12:44 PM EDT, 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1244 PM EDT SAT AUG 11 2012

NCZ042-043-078-111745-
JOHNSTON-WAYNE-WILSON-
1244 PM EDT SAT AUG 11 2012

...A STRONG THUNDERSTORM WILL MOVE ACROSS WAYNE...JOHNSTON AND WILSON
COUNTIES THROUGH 145 PM EDT...

AT 1244 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 5
MILES NORTH OF MAR-MAC...OR ABOUT 7 MILES WEST OF GOLDSBORO...MOVING
NORTHEAST AT 20 MPH.

SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...GOLDSBORO...
NAHUNTA...PIKEVILLE...FREMONT...EUREKA...BLACK CREEK.

HAZARDS INCLUDE...
PEA SIZE HAIL.
GUSTY WINDS OF 30 TO 40 MPH.

SEEK SHELTER IN A NEARBY BUILDING OR VEHICLE. STRONG WINDS ARE
CAPABLE OF KNOCKING DOWN SMALL TREES AND BLOWING AROUND TRASH CANS...
POTTED PLANTS...LAWN FURNITURE AND OTHER LIGHT OUTDOOR OBJECTS.

&&

LAT...LON 3557 7782 3542 7782 3540 7780 3526 7808
      3539 7825 3580 7777 3577 7773 3573 7772
      3567 7766
TIME...MOT...LOC 1644Z 228DEG 18KT 3541 7808

KRR
Special weather statement, Aug 11, 12:59 PM EDT, 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1259 PM EDT SAT AUG 11 2012

NCZ010-011-026-027-111800-
FRANKLIN-HALIFAX-NASH-WARREN-
1259 PM EDT SAT AUG 11 2012

...A STRONG THUNDERSTORM WILL MOVE ACROSS NASH...WARREN...HALIFAX AND
FRANKLIN COUNTIES THROUGH 200 PM EDT...

AT 1258 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
CASTALIA...OR ABOUT 10 MILES EAST OF LOUISBURG...MOVING NORTHEAST AT
20 MPH.

SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...CASTALIA...
CENTERVILLE...ARCOLA...AIRLIE.

HAZARDS INCLUDE...
PEA SIZE HAIL.
GUSTY WINDS OF 30 TO 40 MPH.

SEEK SHELTER IN A NEARBY BUILDING OR VEHICLE. STRONG WINDS ARE
CAPABLE OF KNOCKING DOWN SMALL TREES AND BLOWING AROUND TRASH CANS...
POTTED PLANTS...LAWN FURNITURE AND OTHER LIGHT OUTDOOR OBJECTS.

&&

LAT...LON 3651 7788 3648 7776 3649 7766 3641 7754
      3637 7754 3635 7758 3631 7756 3633 7744
      3629 7741 3626 7741 3615 7768 3615 7770
      3613 7770 3594 7815 3609 7835 3655 7801
      3655 7790
TIME...MOT...LOC 1658Z 227DEG 18KT 3609 7813

KRR
Special weather statement, Aug 11, 1:05 PM EDT, 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
105 PM EDT SAT AUG 11 2012

NCZ022>024-039-111800-
ALAMANCE-GUILFORD-ORANGE-RANDOLPH-
105 PM EDT SAT AUG 11 2012

...A STRONG THUNDERSTORM WILL MOVE ACROSS RANDOLPH...ORANGE...
GUILFORD AND ALAMANCE COUNTIES THROUGH 200 PM EDT...

AT 105 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
CLIMAX...OR ABOUT 11 MILES NORTHEAST OF RANDLEMAN...MOVING NORTHEAST
AT 25 MPH.

SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...ALAMANCE...ELON
COLLEGE...AND...GIBSONVILLE...BURLINGTON...AND...GLEN RAVEN...
GRAHAM...AND...SWEPSONVILLE...HAW RIVER...MEBANE.

HAZARDS INCLUDE...
GUSTY WINDS OF 30 TO 40 MPH.

HEAVY RAINFALL AND MINOR FLOODING.

THIS INCLUDES INTERSTATE 40 BETWEEN EXITS 135 AND 157.

SEEK SHELTER IN A NEARBY BUILDING OR VEHICLE. STRONG WINDS ARE
CAPABLE OF KNOCKING DOWN SMALL TREES AND BLOWING AROUND TRASH CANS...
POTTED PLANTS...LAWN FURNITURE AND OTHER LIGHT OUTDOOR OBJECTS.

THIS STORM 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 3601 7915 3579 7963 3593 7978 3625 7943
TIME...MOT...LOC 1705Z 228DEG 21KT 3592 7963

SEC
Special weather statement, Aug 11, 1:33 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
133 PM EDT SAT AUG 11 2012

NCZ007-008-023-024-111830-
ALAMANCE-GRANVILLE-ORANGE-PERSON-
133 PM EDT SAT AUG 11 2012

...STRONG THUNDERSTORMS WILL MOVE ACROSS PERSON...ORANGE...GRANVILLE
AND ALAMANCE COUNTIES THROUGH 230 PM EDT...

AT 133 PM EDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER
CARR...OR ABOUT OVER PROSPECT HILL...MOVING NORTHEAST AT 25 MPH.

LOCATIONS IN THE PATH OF THESE STORMS INCLUDE BUSHY FORK...ROXBORO...
AND...CONCORD...BETHEL HILL.

HAZARDS INCLUDE...
GUSTY WINDS OF 30 TO 40 MPH.

HEAVY RAINFALL AND MINOR FLOODING.

SEEK SHELTER IN A NEARBY BUILDING OR VEHICLE. STRONG WINDS ARE
CAPABLE OF KNOCKING DOWN SMALL TREES AND BLOWING AROUND TRASH CANS...
POTTED PLANTS...LAWN FURNITURE AND OTHER LIGHT OUTDOOR OBJECTS.

THIS STORM 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 7848 3624 7886 3624 7895 3615 7897
      3600 7915 3621 7939 3625 7935 3625 7916
      3646 7915 3655 7906
TIME...MOT...LOC 1733Z 223DEG 22KT 3628 7917

SEC

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 11:32 PM EDTSpecial Weather StatementRAHForsyth43 min
Aug 11, 1:01 AM EDTSpecial Weather StatementRAHForsyth59 min
Aug 11, 2:15 AM EDTSpecial Weather StatementRAHForsyth30 min
Aug 11, 4:21 AM EDTSpecial Weather StatementRAHDavidson24 min
Aug 11, 4:48 AM EDTSpecial Weather StatementRAHGuilford12 min
Aug 11, 5:35 AM EDTSpecial Weather StatementRAHPerson40 min
Aug 11, 6:11 AM EDTSpecial Weather StatementRAHPerson49 min
Aug 11, 6:44 AM EDTSpecial Weather StatementRAHVance46 min
Aug 11, 12:03 PM EDTSpecial Weather StatementRAHWilson57 min
Aug 11, 12:44 PM EDTSpecial Weather StatementRAHWayne61 min
Aug 11, 12:59 PM EDTSpecial Weather StatementRAHFranklin, Halifax, Warren61 min
Aug 11, 1:05 PM EDTSpecial Weather StatementRAHAlamance55 min
Aug 11, 1:13 PM EDTTornado WarningRAHHalifax, Nash25 min
Aug 11, 1:59 PM EDTSpecial Weather StatementRAHGranville, Orange61 min
Aug 11, 2:08 PM EDTSevere Thunderstorm WarningRAHGranville, Vance52 min
Aug 11, 2:26 PM EDTSevere Thunderstorm WarningRAHDurham, Granville, Orange, Person, Vance50 min
Aug 11, 2:50 PM EDTSpecial Weather StatementRAHFranklin, Warren55 min
Aug 11, 3:19 PM EDTSpecial Weather StatementRAHAlamance, Durham, Granville, Orange, Person, Vance56 min
Aug 11, 3:29 PM EDTSpecial Weather StatementRAHSampson61 min
Aug 11, 3:30 PM EDTFlash Flood WarningRAHDavidson, Guilford, Randolph3 hr
Aug 11, 3:42 PM EDTSpecial Weather StatementRAHFranklin, Warren63 min
Aug 11, 4:07 PM EDTAreal Flood AdvisoryRAHFranklin, Halifax, Warren3 hr
Aug 11, 4:07 PM EDTSpecial Weather StatementRAHEdgecombe, Halifax, Johnston, Nash, Wayne, Wilson83 min
Aug 11, 4:36 PM EDTAreal Flood AdvisoryRAHNash, Wayne, Wilson3 hr
Aug 11, 4:36 PM EDTSevere Thunderstorm WarningRAHJohnston, Wayne, Wilson69 min
Aug 11, 5:13 PM EDTTornado WarningRAHEdgecombe, Wilson62 min
Aug 11, 5:15 PM EDTAreal Flood AdvisoryRAHEdgecombe, Halifax, Wilson3 hr
Aug 11, 5:58 PM EDTSpecial Weather StatementRAHForsyth32 min
Aug 11, 7:33 PM EDTFlash Flood WarningRAHDavidson, Guilford, Randolph3 hr

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.