Alert archive / Georgia / Special Weather Statements in 2011

Special Weather Statement, NWS Charleston, SC

March 30, 2011Screven County, Georgia; Allendale County, South Carolina

NWS Charleston, SC issued this special weather statement at Mar 30, 2011, 8:33 AM EDT for Screven County, Georgia; Allendale County, South Carolina. It was in force for 42 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
Mar 30, 2011, 8:33 AM EDT (12:33 UTC)
Expired
Mar 30, 2011, 9:15 AM EDT
In force
42 min
Issued by
NWS Charleston, SC

Counties Screven County, GA, Allendale County, SC

The radar

The Charleston,SC radar (KCLX), 59 km from the middle of the area, began a volume at 12:35 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

Charleston AFB, SC (KCHS), launched 12:00Z, 0.6 hours before the alert went out and 140 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, Charleston AFB, SC at 12:00Z on 2011-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 145 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, Charleston AFB, SC at 12:00Z on 2011-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 334 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
145 J/kg
Mixed-layer CIN
-103 J/kg
Mixed-layer LCL
529 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
334 m²/s²
0-3 km storm-relative helicity
407 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.3

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 Charleston, SC wrote its last area forecast discussion before this special weather statement went out at Mar 30, 7:02 AM EDT, 1 hour 31 minutes earlier.

Area forecast discussion, Mar 30, 7:02 AM EDT, 1 hour 31 minutes before
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Hazardous weather outlook, Mar 30, 4:23 AM EDT, 4 hours 10 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
423 AM EDT WED MAR 30 2011

AMZ330-350-352-GAZ087-088-099>101-114>119-SCZ040-042>045-047>052-
310000-
CHARLESTON HARBOR-
WATERS FROM SOUTH SANTEE RIVER TO EDISTO BEACH SC OUT 20 NM-
WATERS FROM EDISTO BEACH SC TO SAVANNAH GA OUT 20 NM-JENKINS-SCREVEN-
CANDLER-BULLOCH-EFFINGHAM-TATTNALL-EVANS-INLAND BRYAN-COASTAL BRYAN-
INLAND CHATHAM-COASTAL CHATHAM-ALLENDALE-HAMPTON-INLAND COLLETON-
DORCHESTER-INLAND BERKELEY-INLAND JASPER-BEAUFORT-COASTAL COLLETON-
CHARLESTON-COASTAL JASPER-TIDAL BERKELEY-
423 AM EDT WED MAR 30 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL
WATERS...SOUTHEAST GEORGIA AND SOUTHEAST SOUTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

AMZ354-374-GAZ137>141-310000-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA OUT 20 NM...INCLUDING
GRAYS REEF NATIONAL MARINE SANCTUARY-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA EXTENDING FROM 20 TO
60 NM-LONG-INLAND LIBERTY-COASTAL LIBERTY-INLAND MCINTOSH-
COASTAL MCINTOSH-
423 AM EDT WED MAR 30 2011

...ISOLATED SEVERE THUNDERSTORMS POSSIBLE TODAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND
SOUTHEAST GEORGIA.

.DAY ONE...TODAY AND TONIGHT.

SEVERE THUNDERSTORMS...WIDESPREAD RAIN WITH SCATTERED THUNDERSTORMS
WILL AFFECT SOUTHEAST GEORGIA TODAY. A FEW OF THE THUNDERSTORMS
MAY BECOME SEVERE ACROSS PORTIONS OF LONG...LIBERTY AND MCINTOSH
COUNTIES THIS AFTERNOON WITH A RISK FOR DAMAGING WINDS AND
POSSIBLY TORNADOES. A WIDESPREAD SEVERE WEATHER EVENT APPEARS
UNLIKELY AT THIS TIME.

STAY TUNED TO NOAA WEATHER RADIO...TV OR YOUR LOCAL NEWS SOURCE
FOR THE LATEST FORECAST FROM THE NATIONAL WEATHER SERVICE IN
CHARLESTON.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Mar 30, 7:19 AM EDT, 1 hour 14 minutes before
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Special weather statement, Mar 30, 7:39 AM EDT, 54 minutes before
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Special weather statement, Mar 30, 8:03 AM EDT, 30 minutes before
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Special weather statement, Mar 30, 8:13 AM EDT, 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
813 AM EDT WED MAR 30 2011

GAZ100-116-301245-
BULLOCH-INLAND BRYAN-
813 AM EDT WED MAR 30 2011

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BULLOCH AND BRYAN
COUNTIES THROUGH 845 AM EDT...

AT 812 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR GROVELAND...MOVING NORTHEAST AT 35 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
BAY...DENMARK...GROVELAND...NEVILS...PEMBROKE AND STILSON...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
PENNY SIZE HAIL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
BE READY TO TAKE IMMEDIATE ACTION IN CASE A SEVERE THUNDERSTORM
WARNING IS ISSUED FOR YOUR LOCATION.

&&

LAT...LON 3223 8181 3244 8156 3221 8144 3207 8167
      3209 8170 3211 8176 3220 8180 3222 8180
TIME...MOT...LOC 1214Z 232DEG 29KT 3215 8173
Special weather statement, Mar 30, 8:33 AM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
833 AM EDT WED MAR 30 2011

GAZ088-SCZ040-301315-
ALLENDALE-SCREVEN-
833 AM EDT WED MAR 30 2011

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF SCREVEN AND ALLENDALE
COUNTIES THROUGH 915 AM EDT...

AT 830 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM SYLVANIA TO
HILLTONIA...MOVING NORTHEAST AT 45 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
ALTMAN...HILLTONIA...MILLHAVEN...SYLVANIA...ALLENDALE...APPLETON...
MARTIN...MILLETT...SEIGLING...SYCAMORE AND ULMER...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
PENNY SIZE HAIL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
BE READY TO TAKE IMMEDIATE ACTION IN CASE A SEVERE THUNDERSTORM
WARNING IS ISSUED FOR YOUR LOCATION.

&&

LAT...LON 3304 8156 3307 8161 3309 8161 3316 8154
      3311 8137 3312 8119 3306 8112 3270 8163
      3292 8175
TIME...MOT...LOC 1233Z 228DEG 40KT 3277 8158 3291 8165

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 30, 7:19 AM EDTSpecial Weather StatementCHSCandler26 min
Mar 30, 7:39 AM EDTSpecial Weather StatementCHSCandler36 min
Mar 30, 8:03 AM EDTSpecial Weather StatementCHSJenkins, Screven27 min
Mar 30, 8:13 AM EDTSpecial Weather StatementCHSBulloch32 min
Mar 30, 8:48 AM EDTSpecial Weather StatementCHSScreven27 min
Mar 30, 9:11 AM EDTSpecial Weather StatementCHSBulloch, Candler, Jenkins, Screven64 min
Mar 30, 10:05 AM EDTSpecial Weather StatementCHSScreven55 min
Mar 30, 10:34 AM EDTSpecial Weather StatementCHSBryan, Effingham26 min
Mar 30, 12:00 PM EDTSpecial Marine WarningCHS2 hr

Nearby

Special Weather Statements in Georgia, 2011Special Weather Statements in South 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.