Alert archive / North Carolina / Special Weather Statements in 2011

Special Weather Statement, NWS Raleigh, NC

April 9, 2011Forsyth County, North Carolina

NWS Raleigh, NC issued this special weather statement at Apr 9, 2011, 5:11 PM EDT for Forsyth County, North Carolina. It was in force for 34 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
Apr 9, 2011, 5:11 PM EDT (21:11 UTC)
Expired
Apr 9, 2011, 5:45 PM EDT
In force
34 min
Issued by
NWS Raleigh, NC

County Forsyth County, NC

The radar

The Roanoke radar (KFCX), 98 km from the middle of the area, began a volume at 21:12 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, 9.2 hours before the alert went out and 25 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 2011-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2011-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 169 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
704 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
169 m²/s²
0-3 km storm-relative helicity
256 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 Apr 9, 3:38 PM EDT, 1 hour 33 minutes earlier.

Area forecast discussion, Apr 9, 3:38 PM EDT, 1 hour 33 minutes before
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Hazardous weather outlook, Apr 9, 2:57 PM EDT, 2 hours 14 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RALEIGH NC
257 PM EDT SAT APR 9 2011

NCZ074-075-084>086-101100-
MONTGOMERY-MOORE-RICHMOND-SCOTLAND-HOKE-
257 PM EDT SAT APR 9 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED THUNDERSTORMS ARE EXPECTED TO MOVE SOUTHEASTWARD ACROSS
THE SOUTHERN NC PIEDMONT AND WESTERN SANDHILLS LATE THIS AFTERNOON
THROUGH THE EARLY NIGHTTIME HOURS. A FEW OF THESE STORMS MAY
BECOME STRONG TO SEVERE...WITH A PRIMARY THREAT OF HAIL AS LARGE
AS QUARTERS. ISOLATED DAMAGING WIND GUSTS TO AROUND 60 MPH WILL
ALSO BE POSSIBLE. THE SEVERE WEATHER RISK WILL BE HIGHEST BETWEEN
5 PM AND 1 AM.

PEOPLE ACROSS THE AREA ARE ENCOURAGED TO KEEP UP WITH THE LATEST
WEATHER INFORMATION LATE TODAY AND TONIGHT THROUGH NOAA WEATHER
RADIO... LOCAL MEDIA... OR BY VISITING OUR WEBSITE AT
WEATHER.GOV/RALEIGH.

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

A COLD FRONT WILL SWEEP EAST ACROSS CENTRAL NORTH CAROLINA LATE
MONDAY NIGHT THROUGH DAYBREAK TUESDAY... BRINGING A CHANCE OF
SHOWERS AND THUNDERSTORMS. A FEW OF THESE STORMS MAY PRODUCE
STRONG WIND GUSTS IN EXCESS OF 45 MPH.

OTHERWISE... HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

NCZ007>011-021>028-038>043-076>078-088-089-101100-
PERSON-GRANVILLE-VANCE-WARREN-HALIFAX-FORSYTH-GUILFORD-ALAMANCE-
ORANGE-DURHAM-FRANKLIN-NASH-EDGECOMBE-DAVIDSON-RANDOLPH-CHATHAM-WAKE-
JOHNSTON-WILSON-LEE-HARNETT-WAYNE-CUMBERLAND-SAMPSON-
257 PM EDT SAT APR 9 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED TO DEVELOP AND
MOVE SOUTHEASTWARD ACROSS CENTRAL NC LATE THIS AFTERNOON THROUGH
THE EARLY NIGHTTIME HOURS. A FEW OF THESE STORMS MAY BECOME STRONG
TO SEVERE...WITH A PRIMARY THREAT OF HAIL AS LARGE AS QUARTERS.
THE SEVERE WEATHER RISK WILL BE HIGHEST BETWEEN 5 PM AND 11 PM
OVER THE NORTHWEST PIEDMONT...INCLUDING THE TRIAD...AND BETWEEN 7
PM AND 1 AM ACROSS THE REMAINDER OF CENTRAL NC.

PEOPLE ACROSS THE AREA ARE ENCOURAGED TO KEEP UP WITH THE LATEST
WEATHER INFORMATION LATE TODAY AND TONIGHT THROUGH NOAA WEATHER
RADIO... LOCAL MEDIA... OR BY VISITING OUR WEBSITE AT
WEATHER.GOV/RALEIGH.

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

A COLD FRONT WILL SWEEP EAST ACROSS CENTRAL NORTH CAROLINA LATE
MONDAY NIGHT THROUGH DAYBREAK TUESDAY... BRINGING A CHANCE OF
SHOWERS AND THUNDERSTORMS. A FEW OF THESE STORMS MAY PRODUCE
STRONG WIND GUSTS IN EXCESS OF 45 MPH.

OTHERWISE... HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

NCZ073-083-101100-
STANLY-ANSON-
257 PM EDT SAT APR 9 2011

...SEVERE THUNDERSTORM WATCH 114 IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

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

   SEVERE THUNDERSTORM WATCH.

SCATTERED THUNDERSTORMS ARE EXPECTED TO MOVE SOUTHEASTWARD ACROSS
THE SOUTHERN NC PIEDMONT AND WESTERN SANDHILLS LATE THIS AFTERNOON
AND EVENING. A FEW OF THESE STORMS MAY BECOME STRONG TO
SEVERE...WITH A PRIMARY THREAT OF HAIL AS LARGE AS QUARTERS.
ISOLATED DAMAGING WIND GUSTS TO AROUND 60 MPH WILL ALSO BE
POSSIBLE. WHILE THE SEVERE WEATHER RISK WILL BE HIGHEST THROUGH 9
PM...SOME STRONG TO SEVERE THUNDERSTORMS WITH UP TO QUARTER
SIZED HAIL WILL REMAIN POSSIBLE THROUGH AROUND MIDNIGHT.

PEOPLE ACROSS THE AREA ARE ENCOURAGED TO KEEP UP WITH THE LATEST
WEATHER INFORMATION LATE TODAY AND TONIGHT THROUGH NOAA WEATHER
RADIO... LOCAL MEDIA... OR BY VISITING OUR WEBSITE AT
WEATHER.GOV/RALEIGH.

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

A COLD FRONT WILL SWEEP EAST ACROSS CENTRAL NORTH CAROLINA LATE
MONDAY NIGHT THROUGH DAYBREAK TUESDAY... BRINGING A CHANCE OF
SHOWERS AND THUNDERSTORMS. A FEW OF THESE STORMS MAY PRODUCE
STRONG WIND GUSTS IN EXCESS OF 45 MPH.

OTHERWISE... HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Apr 9, 12:54 PM EDT, 4 hours 17 minutes before
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Special weather statement, Apr 9, 4:44 PM EDT, 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
444 PM EDT SAT APR 9 2011

NCZ021-022-092145-
FORSYTH-GUILFORD-
444 PM EDT SAT APR 9 2011

...A STRONG THUNDERSTORM WILL MOVE ACROSS FORSYTH AND NORTHWESTERN
GUILFORD COUNTIES THROUGH 545 PM EDT...

AT 442 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR
EAST BEND IN YADKIN COUNTY MOVING EAST AT 50 MPH. THIS STORM WILL
MOVE INTO FORSYTH COUNTY BETWEEN 445 AND 500 PM. THE CURRENT
MOVEMENT OF THE STORM WILL BRING IT OVER WINSTON-SALEM AROUND 500
PM.

OTHER LOCATIONS AFFECTED BY THIS STORM INCLUDE...PFAFFTOWN...RURAL
HALL...WALKERTOWN......KERNERSVILLE...COLFAX...SUMMERFIELD...PTI
AIRPORT.

HAZARDS INCLUDE...
PEA SIZED HAIL.
DEADLY CLOUD TO GROUND LIGHTNING.
BRIEF VERY HEAVY RAIN.

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 3612 8048 3612 8045 3626 8045 3624 7954
      3623 7954 3602 7989 3607 8052
TIME...MOT...LOC 2041Z 276DEG 42KT 3618 8047

BADGETT
Special weather statement, Apr 9, 5:11 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
511 PM EDT SAT APR 9 2011

NCZ021-022-092145-
FORSYTH-GUILFORD-
511 PM EDT SAT APR 9 2011

...A STRONG THUNDERSTORM WILL MOVE ACROSS NORTHEASTERN FORSYTH AND
NORTHWESTERN GUILFORD COUNTIES THROUGH 545 PM EDT...

AT 510 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR
OVER STANLEYVILLE OR ABOUT 6 MILES NORTH OF WINSTON-SALEM... MOVING
EAST AT 40 MPH. THE CURRENT MOVEMENT OF THE STORM WOULD BRING IT
NEAR THE PTI AIRPORT AROUND 525 PM.

OTHER LOCATIONS AFFECTED BY THIS STORM
INCLUDE...WALKERTOWN......KERNERSVILLE...COLFAX...SUMMERFIELD.

HAZARDS INCLUDE...
PEA SIZED HAIL.
DEADLY CLOUD TO GROUND LIGHTNING.
BRIEF VERY HEAVY RAIN.

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 3612 8048 3612 8045 3626 8045 3624 7954
      3623 7954 3602 7989 3607 8052
TIME...MOT...LOC 2041Z 275DEG 34KT 3618 8047

BADGETT

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 8, 10:02 PM EDTSpecial Weather StatementRAHAlamance, Orange58 min
Apr 8, 10:32 PM EDTSpecial Weather StatementRAHOrange, Wake58 min
Apr 8, 11:15 PM EDTSpecial Weather StatementRAHJohnston, Wake, Wayne, Wilson75 min
Apr 9, 12:01 AM EDTSpecial Weather StatementRAHAlamance, Durham, Forsyth, Guilford, Orange, Person59 min
Apr 9, 12:19 AM EDTSevere Thunderstorm WarningRAHGuilford41 min
Apr 9, 12:49 AM EDTSpecial Weather StatementRAHChatham56 min
Apr 9, 1:14 AM EDTSpecial Weather StatementRAHRandolph31 min
Apr 9, 1:25 AM EDTSpecial Weather StatementRAHForsyth35 min
Apr 9, 1:35 AM EDTSpecial Weather StatementRAHHarnett40 min
Apr 9, 1:55 AM EDTSevere Thunderstorm WarningRAHDavidson, Forsyth35 min
Apr 9, 2:29 AM EDTSevere Thunderstorm WarningRAHDavidson, Randolph36 min
Apr 9, 2:59 AM EDTSevere Thunderstorm WarningRAHMontgomery, Moore, Randolph46 min
Apr 9, 4:44 PM EDTSpecial Weather StatementRAHForsyth61 min
Apr 9, 6:35 PM EDTSpecial Weather StatementRAHForsyth, Guilford55 min
Apr 9, 6:59 PM EDTSpecial Weather StatementRAHForsyth, Guilford31 min
Apr 9, 7:20 PM EDTSevere Thunderstorm WarningRAHAnson, Stanly40 min
Apr 9, 7:21 PM EDTSpecial Weather StatementRAHAlamance, Chatham, Durham, Franklin, Granville, Orange and 4 more54 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.