Alert archive / South Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Charleston, SC

July 10, 2012Allendale County, South Carolina

NWS Charleston, SC issued this special weather statement at Jul 10, 2012, 7:42 PM EDT for Allendale County, South Carolina. It was in force for 33 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 10, 2012, 7:42 PM EDT (23:42 UTC)
Expired: Jul 10, 2012, 8:15 PM EDT
In force: 33 min
Issued by: NWS Charleston, SC

County Allendale County, SC

The radar

The Charleston,SC radar (KCLX), 46 km from the middle of the area, began a volume at 23:45 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, 11.7 hours before the alert went out and 125 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: 1486 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1034 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: -32 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 Charleston, SC wrote its last area forecast discussion before this special weather statement went out at Jul 10, 7:27 PM EDT, 15 minutes earlier.

Area forecast discussion, Jul 10, 7:27 PM EDT, 15 minutes before

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Hazardous weather outlook, Jul 10, 6:12 PM EDT, 1 hour 30 minutes before

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In the hours before

Special weather statement, Jul 10, 6:01 PM EDT, 1 hour 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
601 PM EDT TUE JUL 10 2012

SCZ042-047-048-051-102230-
BEAUFORT-COASTAL JASPER-HAMPTON-INLAND JASPER-
601 PM EDT TUE JUL 10 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF HAMPTON...JASPER AND
BEAUFORT COUNTIES THROUGH 630 PM EDT...

AT 559 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM GARDENS CORNER TO
COOSAWHATCHIE...MOVING SOUTHEAST AT 10 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
COOSAWHATCHIE...DALE...GARDENS CORNER...POCOTALIGO AND SHELDON...

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HAVE AN ACTION PLAN READY IN THE EVENT THIS STORM STRENGTHENS OR A
WARNING IS ISSUED. CONTINUE TO MONITOR NOAA WEATHER RADIO ALL HAZARDS
FOR THE LATEST WEATHER INFORMATION.

&&

LAT...LON 3263 8100 3270 8082 3267 8077 3268 8074
      3266 8070 3267 8067 3266 8068 3265 8068
      3264 8066 3263 8068 3262 8065 3259 8064
      3259 8058 3248 8084
TIME...MOT...LOC 2201Z 295DEG 7KT 3265 8077 3259 8092

Local storm report, Jul 10, 6:05 PM EDT, 1 hour 37 minutes before

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Local storm report, Jul 10, 6:16 PM EDT, 1 hour 26 minutes before

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Special weather statement, Jul 10, 6:38 PM EDT, 1 hour 4 minutes before

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Special weather statement, Jul 10, 6:40 PM EDT, 1 hour 2 minutes before

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Special weather statement, Jul 10, 7:42 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 3:39 PM EDT	Small Craft Advisory	CHS		3 hr
Jul 10, 5:02 PM EDT	Special Marine Warning	CHS		51 min
Jul 9, 8:57 PM EDT	Special Weather Statement	CHS	Clarendon	33 min
Jul 9, 9:47 PM EDT	Special Weather Statement	CHS	Berkeley	28 min
Jul 9, 9:55 PM EDT	Special Weather Statement	CHS	Berkeley	35 min
Jul 9, 10:18 PM EDT	Special Weather Statement	CHS	Berkeley	27 min
Jul 9, 10:28 PM EDT	Special Weather Statement	CHS	Clarendon	47 min
Jul 9, 11:04 PM EDT	Special Weather Statement	CHS	Clarendon	26 min
Jul 9, 11:23 PM EDT	Special Weather Statement	CHS	Berkeley	67 min
Jul 10, 1:38 PM EDT	Special Weather Statement	CHS	Dorchester	37 min
Jul 10, 2:09 PM EDT	Special Weather Statement	CHS	Georgetown	66 min
Jul 10, 2:30 PM EDT	Special Weather Statement	CHS	Dorchester	30 min
Jul 10, 2:38 PM EDT	Special Weather Statement	CHS	Clarendon	37 min
Jul 10, 2:48 PM EDT	Severe Thunderstorm Warning	CHS	Dorchester	57 min
Jul 10, 2:50 PM EDT	Special Weather Statement	CHS	Berkeley	25 min
Jul 10, 2:57 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	63 min
Jul 10, 3:02 PM EDT	Special Weather Statement	CHS	Colleton	28 min
Jul 10, 3:17 PM EDT	Severe Thunderstorm Warning	CHS	Colleton, Dorchester	58 min
Jul 10, 3:23 PM EDT	Special Weather Statement	CHS	Berkeley	37 min
Jul 10, 3:44 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	61 min
Jul 10, 3:50 PM EDT	Severe Thunderstorm Warning	CHS	Charleston, Colleton, Dorchester	55 min
Jul 10, 3:58 PM EDT	Special Weather Statement	CHS	Berkeley	47 min
Jul 10, 4:50 PM EDT	Special Weather Statement	CHS	Colleton	25 min
Jul 10, 5:19 PM EDT	Special Weather Statement	CHS	Colleton	26 min
Jul 10, 5:24 PM EDT	Severe Thunderstorm Warning	CHS	Charleston, Colleton	66 min
Jul 10, 6:01 PM EDT	Special Weather Statement	CHS	Beaufort	29 min
Jul 10, 6:28 PM EDT	Areal Flood Advisory	CHS	Colleton	92 min
Jul 10, 6:38 PM EDT	Special Weather Statement	CHS	Allendale	37 min
Jul 10, 6:40 PM EDT	Special Weather Statement	CHS	Colleton	35 min

Nearby

Special Weather Statements in South Carolina, 2012 Every 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.