Alert archive / South Carolina / Special Weather Statements in 2014

Special Weather Statement, NWS Charleston, SC

February 21, 2014Allendale County, Hampton County, South Carolina

NWS Charleston, SC issued this special weather statement at Feb 21, 2014, 10:39 AM EST for Allendale County, Hampton County, South Carolina. It was in force for 36 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: Feb 21, 2014, 10:39 AM EST (15:39 UTC)
Expired: Feb 21, 2014, 11:15 AM EST
In force: 36 min
Issued by: NWS Charleston, SC

Counties Allendale County, SC, Hampton County, SC

The radar

The Charleston,SC radar (KCLX), 29 km from the middle of the area, began a volume at 15:41 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, 3.7 hours before the alert went out and 104 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 931 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 484 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 143 m²/s²
0-3 km storm-relative helicity: 202 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.4

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 Feb 21, 10:06 AM EST, 33 minutes earlier.

Area forecast discussion, Feb 21, 10:06 AM EST, 33 minutes before

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Hazardous weather outlook, Feb 21, 9:37 AM EST, 1 hour 2 minutes before

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In the hours before

Special weather statement, Feb 21, 9:43 AM EST, 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
943 AM EST FRI FEB 21 2014

GAZ099-100-114-115-211530-
BULLOCH-CANDLER-EVANS-TATTNALL-
943 AM EST FRI FEB 21 2014

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF TATTNALL...EVANS...
BULLOCH AND CANDLER COUNTIES THROUGH 1030 AM EST...

AT 939 AM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM 7 MILES WEST OF
COBBTOWN TO 12 MILES WEST OF ALTAMAHA...MOVING NORTHEAST AT 55 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
COBBTOWN...ALTAMAHA...GORDONIA ALTAMAHA STATE PARK...COLLINS...
BRANNEN LAKE...TISON...UNDINE...MENDES...REGISTER...NEW HOPE...

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH IS ALSO IN EFFECT. THUNDERSTORMS CAN
PRODUCE LARGE HAIL...DAMAGING WINDS...AND ISOLATED TORNADOES
SUDDENLY...SOMETIMES WITH LITTLE OR NO WARNING. BE ALERT FOR RAPIDLY
CHANGING WEATHER CONDITIONS AND BE READY TO ACT QUICKLY IF SEVERE
WEATHER IS OBSERVED OR A WARNING IS ISSUED.

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 3230 8215 3250 8160 3220 8157 3215 8178
      3211 8176 3209 8172 3197 8188 3189 8189
      3179 8198 3179 8197 3178 8198 3182 8202
      3186 8212 3189 8211 3189 8213 3190 8214
      3191 8222 3197 8222 3217 8219 3233 8224
TIME...MOT...LOC 1443Z 240DEG 48KT 3231 8221 3195 8235

Local storm report, Feb 21, 9:58 AM EST, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
958 AM EST FRI FEB 21 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0935 AM     LIGHTNING        4 NNW METTER            32.44N  82.09W
02/21/2014                   CANDLER            GA   911 CALL CENTER

            CANDLER COUNTY COMMUNICATIONS CENTER REPORTS TREE
            STRUCK BY LIGHTNING AND DOWN ALONG HIGHWAY 23.

&&

EVENT NUMBER CHS1400478

JHP

Special weather statement, Feb 21, 10:39 AM EST, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1039 AM EST FRI FEB 21 2014

SCZ040-042-043-211615-
ALLENDALE-HAMPTON-INLAND COLLETON-
1039 AM EST FRI FEB 21 2014

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF ALLENDALE...HAMPTON
AND COLLETON COUNTIES THROUGH 1115 AM EST...

AT 1037 AM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM ULMER TO
BRIGHTON...MOVING EAST AT 45 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
LURAY...GIFFORD...LAKE WARREN STATE PARK...STAFFORD...
HAMPTON-VARNVILLE AIRPORT...VARNVILLE...MOSELLE...MILEY...LODGE...
ISLANDTON...

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH IS ALSO IN EFFECT. THUNDERSTORMS CAN
PRODUCE LARGE HAIL...DAMAGING WINDS...AND ISOLATED TORNADOES
SUDDENLY...SOMETIMES WITH LITTLE OR NO WARNING. BE ALERT FOR RAPIDLY
CHANGING WEATHER CONDITIONS AND BE READY TO ACT QUICKLY IF SEVERE
WEATHER IS OBSERVED OR A WARNING IS ISSUED.

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 3265 8139 3269 8141 3312 8139 3311 8131
      3312 8119 3306 8112 3303 8108 3310 8094
      3307 8090 3309 8088 3313 8090 3316 8083
      3316 8081 3284 8067 3269 8096 3276 8102
      3256 8129 3258 8137 3262 8141
TIME...MOT...LOC 1539Z 255DEG 41KT 3310 8120 3264 8126

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 20, 7:35 PM EST	Small Craft Advisory	CHS		22 hr
Feb 20, 7:37 PM EST	Dense Fog Advisory	CHS		8 hr
Feb 21, 9:17 AM EST	Severe Thunderstorm Warning	CHS	Allendale	58 min
Feb 21, 11:12 AM EST	Special Marine Warning	CHS		2 hr
Feb 21, 11:19 AM EST	Special Weather Statement	CHS	Colleton, Dorchester	26 min
Feb 21, 11:25 AM EST	Severe Thunderstorm Warning	CHS	Berkeley, Charleston, Colleton, Dorchester	65 min
Feb 21, 11:39 AM EST	Special Weather Statement	CHS	Beaufort	51 min
Feb 21, 1:15 PM EST	Special Marine Warning	CHS		90 min
Feb 21, 9:43 AM EST	Special Weather Statement	CHS	Bulloch, Evans, Tattnall	47 min

Nearby

Special Weather Statements in South Carolina, 2014 Every special weather statement in 2014

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.