Alert archive / North Carolina / Special Weather Statements in 2011

Special Weather Statement, NWS Raleigh, NC

July 30, 2011Granville County, North Carolina

NWS Raleigh, NC issued this special weather statement at Jul 30, 2011, 7:44 PM EDT for Granville County, North Carolina. It was in force for 61 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
Jul 30, 2011, 7:44 PM EDT (23:44 UTC)
Expired
Jul 30, 2011, 8:45 PM EDT
In force
61 min
Issued by
NWS Raleigh, NC

County Granville County, NC

The radar

The Raleigh/Durham radar (KRAX), 89 km from the middle of the area, began a volume at 23:44 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

Roanoke, VA (KRNK), launched 12:00Z, 11.7 hours before the alert went out and 114 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, Roanoke, VA at 12:00Z on 2011-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 841 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, Roanoke, VA at 12:00Z on 2011-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.1939Sfc1 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
841 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
793 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
61 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.

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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 Jul 30, 3:30 PM EDT, 4 hours 14 minutes earlier.

Area forecast discussion, Jul 30, 3:30 PM EDT, 4 hours 14 minutes before
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Hazardous weather outlook, Jul 30, 4:08 AM EDT, 15 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RALEIGH NC
408 AM EDT SAT JUL 30 2011

NCZ008>011-024>028-040>043-073>078-083>086-088-089-310815-
GRANVILLE-VANCE-WARREN-HALIFAX-ORANGE-DURHAM-FRANKLIN-NASH-EDGECOMBE-
CHATHAM-WAKE-JOHNSTON-WILSON-STANLY-MONTGOMERY-MOORE-LEE-HARNETT-
WAYNE-ANSON-RICHMOND-SCOTLAND-HOKE-CUMBERLAND-SAMPSON-
408 AM EDT SAT JUL 30 2011

...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 9 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   HEAT ADVISORY.

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP LATE THIS
AFTERNOON AND MAY PERSIST INTO TONIGHT. AN ISOLATED SEVERE
THUNDERSTORM IS POSSIBLE WITH A PRIMARY THREAT OF DAMAGING
DOWNBURST WINDS.

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

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED ON SUNDAY AND
SUNDAY NIGHT. A FEW OF THESE STORMS MAY PRODUCE STRONG DOWNBURST
WINDS AND VERY HEAVY RAIN THAT COULD PRODUCE LOCALIZED FLOODING.

NCZ007-021>023-038-039-310815-
PERSON-FORSYTH-GUILFORD-ALAMANCE-DAVIDSON-RANDOLPH-
408 AM EDT SAT JUL 30 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

HIGH TEMPERATURES OF 95 TO 100 DEGREES ARE EXPECTED TODAY.
PEOPLE ARE ADVISED TO LIMIT TIME OUTDOORS AND IN THE SUN. SPEND AS
MUCH TIME AS POSSIBLE IN AIR CONDITIONING...AND DRINK PLENTY OF
WATER.

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON
AND MAY PERSIST INTO TONIGHT. AN ISOLATED SEVERE THUNDERSTORM IS
POSSIBLE WITH A PRIMARY THREAT OF DAMAGING DOWNBURST WINDS.

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

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED ON SUNDAY AND
SUNDAY NIGHT. A FEW OF THESE STORMS MAY PRODUCE STRONG DOWNBURST
WINDS AND VERY HEAVY RAIN THAT COULD PRODUCE LOCALIZED FLOODING.

BLAES

In the hours before

Special weather statement, Jul 30, 7:31 PM EDT, 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
731 PM EDT SAT JUL 30 2011

NCZ025-041-310030-
DURHAM-WAKE-
731 PM EDT SAT JUL 30 2011

...A STRONG THUNDERSTORM WILL AFFECT EASTERN DURHAM AND NORTHERN
WAKE COUNTIES THROUGH 830 PM...

AT 727 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
RDU INTERNATIONAL AIRPORT EXTENDING EAST... ALONG I-540 THROUGH
NORTH RALEIGH... AND NORTH ALONG HIGHWAY 50 OR CREEDMOOR ROAD NEAR
FALLS LAKE... MOVING SOUTHEAST AT 10 MPH.

SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...RDU INTERNATIONAL
AIRPORT THROUGH NORTH RALEIGH.

VERY HEAVY RAIN WITH RAINFALL RATES IN EXCESS OF 2 INCHES PER HOUR
WILL FALL. MOST AREAS WILL SEE RAIN FOR AROUND 30 MINUTES.

FREQUENT LIGHTNING AND GUSTY WIND TO 40 MPH WILL OCCUR.

SEEK SHELTER IN A NEARBY BUILDING OR VEHICLE.

IF YOU SEE LIGHTNING OR HEAR THUNDER...YOU ARE AT RISK. TAKE SHELTER
INDOORS IMMEDIATELY. IF YOU CANNOT FIND SHELTER IN A BUILDING A
VEHICLE PROVIDES SAFETY FROM LIGHTNING.

&&

LAT...LON 3590 7837 3566 7852 3586 7887 3602 7877
TIME...MOT...LOC 2327Z 297DEG 7KT 3590 7872

BADGETT
Special weather statement, Jul 30, 7:44 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
744 PM EDT SAT JUL 30 2011

NCZ007-008-310045-
GRANVILLE-PERSON-
744 PM EDT SAT JUL 30 2011

...A STRONG THUNDERSTORM WILL MOVE ACROSS PERSON AND NORTHERN
GRANVILLE COUNTIES THROUGH 845 PM EDT...

AT 744 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
BETHEL HILL...OR ABOUT OVER VIRGILINA...MOVING SOUTHEAST AT 20 MPH.

SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...OAK HILL...STOVALL...
OXFORD.

HAZARDS INCLUDE...
PEA SIZE HAIL.
GUSTY WINDS OF 40 TO 50 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.

&&

LAT...LON 3654 7845 3653 7845 3652 7849 3649 7851
      3623 7851 3631 7881 3644 7893 3655 7888
TIME...MOT...LOC 2344Z 301DEG 16KT 3650 7881

22

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 7:31 PM EDTSpecial Weather StatementRAHWake59 min

Nearby

Special Weather Statements in North Carolina, 2011Every special weather statement in 2011

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.