Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Charleston, SC

April 21, 2012Bulloch County, Georgia

NWS Charleston, SC issued this special weather statement at Apr 21, 2012, 5:12 PM EDT for Bulloch County, Georgia. 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: Apr 21, 2012, 5:12 PM EDT (21:12 UTC)
Expired: Apr 21, 2012, 5:45 PM EDT
In force: 33 min
Issued by: NWS Charleston, SC

County Bulloch County, GA

The radar

The Charleston,SC radar (KCLX), 57 km from the middle of the area, began a volume at 21:13 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, 9.2 hours before the alert went out and 158 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: 754 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 750 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.6

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 Apr 21, 4:18 PM EDT, 54 minutes earlier.

Area forecast discussion, Apr 21, 4:18 PM EDT, 54 minutes before

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Hazardous weather outlook, Apr 21, 4:15 PM EDT, 57 minutes before

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In the hours before

Local storm report, Apr 21, 2:13 PM EDT, 2 hours 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
213 PM EDT SAT APR 21 2012

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

0145 PM     HAIL             3 SSW BONNEAU           33.27N  79.98W
04/21/2012  E1.00 INCH       BERKELEY           SC   PUBLIC

&&

EVENT NUMBER CHS1200103

SPR

Local storm report, Apr 21, 2:30 PM EDT, 2 hours 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
230 PM EDT SAT APR 21 2012

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

0210 PM     HAIL             5 ESE BONNEAU           33.28N  79.89W
04/21/2012  E0.88 INCH       BERKELEY           SC   PUBLIC

            NICKEL SIZE HAIL FELL AT THE HANDY MART ON ROUTE 17-A.

&&

EVENT NUMBER CHS1200104

SPR

Special weather statement, Apr 21, 2:40 PM EDT, 2 hours 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
240 PM EDT SAT APR 21 2012

SCZ045-211915-
INLAND BERKELEY-
240 PM EDT SAT APR 21 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BERKELEY COUNTY
THROUGH 315 PM EDT...
...MARINERS ON LAKE MOULTRIE AND EASTERN LAKE MARION SHOULD SEEK
SAFE HARBOR...

AT 237 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR PRIOLEAU...MOVING NORTH AT 20 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
BONNEAU...BONNEAU BEACH...CROSS...EADYTOWN...EASTERN LAKE
MARION...LAKE MOULTRIE AND SAINT STEPHEN...

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS ARE EXPECTED TO IMPACT LAKE MOULTRIE. BOATERS SHOULD
SEEK SAFE HARBOR IMMEDIATELY. IF CAUGHT ON THE OPEN WATERS...STAY AS
LOW AS POSSIBLE AND WEAR A PERSONAL FLOATATION DEVICE. SWIMMERS
SHOULD GET OUT OF THE WATER AND INTO A STURDY BUILDING. REMEMBER...IF
YOU CAN HEAR THUNDER YOU ARE AT RISK OF BEING STRUCK BY LIGHTNING.

&&

LAT...LON 3350 7996 3345 7989 3324 7995 3323 8034
      3326 8037 3327 8037 3328 8035 3327 8030
      3330 8026 3344 8023 3346 8015 3348 8016
      3350 8013 3351 8005
TIME...MOT...LOC 1840Z 184DEG 15KT 3339 8017

Special weather statement, Apr 21, 3:29 PM EDT, 1 hour 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
329 PM EDT SAT APR 21 2012

SCZ045-212000-
INLAND BERKELEY-
329 PM EDT SAT APR 21 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BERKELEY COUNTY
THROUGH 400 PM EDT...

AT 325 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR BLACK CREEK...MOVING NORTHEAST AT 20 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
CROSS...EADYTOWN AND EASTERN LAKE MARION...

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

CONTACT THE NATIONAL WEATHER SERVICE IN CHARLESTON TOLL FREE AT
1-888-383-2024 IF YOU OBSERVE SEVERE WEATHER SUCH AS HAIL...DOWNED
TREES...LIMBS AND POWER LINES. REPORTS CAN ALSO BE SENT BY EMAIL TO
CHS.SKYWARN@NOAA.GOV OR THROUGH TWITTER USING #WXREPORT.

&&

LAT...LON 3350 7996 3348 7994 3322 8025 3326 8031
      3330 8026 3336 8024 3339 8025 3340 8023
      3344 8023 3346 8015 3348 8016 3350 8013
      3351 8005
TIME...MOT...LOC 1929Z 222DEG 16KT 3335 8026

Local storm report, Apr 21, 3:57 PM EDT, 1 hour 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
357 PM EDT SAT APR 21 2012

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

0311 PM     TSTM WND GST     14 WNW SAINT STEPHEN    33.48N  80.15W
04/21/2012  M50 MPH          BERKELEY           SC   OFFICIAL NWS OBS

            THUNDERSTORM WIND GUST WAS MEASURED AT THE NWS HANDAR
            SITE ON SANTEE DAM.

&&

EVENT NUMBER CHS1200105

SPR

Special weather statement, Apr 21, 5:12 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
Apr 21, 4:20 AM EDT	Dense Fog Advisory	CHS	Bulloch, Candler, Evans, Jenkins, Screven, Tattnall	5 hr
Apr 21, 4:13 PM EDT	Small Craft Advisory	CHS		59 hr
Apr 21, 5:22 PM EDT	Special Weather Statement	CHS	Bulloch	23 min
Apr 21, 5:45 PM EDT	Special Weather Statement	CHS	Bulloch	45 min
Apr 21, 6:28 PM EDT	Special Weather Statement	CHS	Candler	47 min
Apr 21, 12:31 PM EDT	Special Weather Statement	CHS	Berkeley	44 min
Apr 21, 1:16 PM EDT	Special Weather Statement	CHS	Berkeley	44 min
Apr 21, 1:19 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	41 min
Apr 21, 1:58 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	31 min
Apr 21, 2:40 PM EDT	Special Weather Statement	CHS	Berkeley	35 min
Apr 21, 2:51 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	24 min
Apr 21, 3:29 PM EDT	Special Weather Statement	CHS	Berkeley	31 min

Nearby

Special Weather Statements in Georgia, 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.