Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Charleston, SC

May 17, 2012Chatham County, Georgia

NWS Charleston, SC issued this special weather statement at May 17, 2012, 4:23 PM EDT for Chatham County, Georgia. It was in force for 37 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: May 17, 2012, 4:23 PM EDT (20:23 UTC)
Expired: May 17, 2012, 5:00 PM EDT
In force: 37 min
Issued by: NWS Charleston, SC

County Chatham County, GA

The radar

The Charleston,SC radar (KCLX), 63 km from the middle of the area, began a volume at 20:25 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, 8.4 hours before the alert went out and 141 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: 1254 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 592 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 1 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -0.8

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 May 17, 4:16 PM EDT, 7 minutes earlier.

Area forecast discussion, May 17, 4:16 PM EDT, 7 minutes before

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Hazardous weather outlook, May 17, 3:12 PM EDT, 1 hour 11 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
312 PM EDT THU MAY 17 2012

GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047>052-181915-
JENKINS-SCREVEN-CANDLER-BULLOCH-EFFINGHAM-TATTNALL-EVANS-
INLAND BRYAN-COASTAL BRYAN-INLAND CHATHAM-COASTAL CHATHAM-LONG-
INLAND LIBERTY-COASTAL LIBERTY-INLAND MCINTOSH-COASTAL MCINTOSH-
ALLENDALE-HAMPTON-INLAND COLLETON-DORCHESTER-INLAND BERKELEY-
INLAND JASPER-BEAUFORT-COASTAL COLLETON-CHARLESTON-COASTAL JASPER-
TIDAL BERKELEY-
312 PM EDT THU MAY 17 2012

...ISOLATED SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING...

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED TO NUMEROUS THUNDERSTORMS WILL CONTINUE TO DEVELOP
ACROSS SOUTHERN SOUTH CAROLINA AND SOUTHEAST GEORGIA THIS
AFTERNOON AND CONTINUE INTO THE EVENING. A FEW STORMS MAY BECOME
SEVERE AND PRODUCE HAIL QUARTER SIZE OR LARGER AND WIND GUSTS IN
EXCESS OF 58 MPH. DUE TO THE SLOW MOVEMENT OF THE STORMS...
TORRENTIAL RAINFALL COULD RESULT IN MINOR FLOODING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

RIP CURRENTS...MODERATE ONSHORE FLOW AND SMALL SWELLS WILL LEAD TO
AN ELEVATED RISK FOR RIP CURRENTS THIS WEEKEND INTO EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO RELAY REPORTS OF SEVERE WEATHER TO THE
NATIONAL WEATHER SERVICE IN CHARLESTON SC.

AMZ330-350-352-354-374-181915-
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-
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-
312 PM EDT THU MAY 17 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, May 17, 2:49 PM EDT, 1 hour 34 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
249 PM EDT THU MAY 17 2012

SCZ042>044-047>051-171945-
BEAUFORT-CHARLESTON-COASTAL COLLETON-COASTAL
JASPER-DORCHESTER-HAMPTON-INLAND COLLETON-INLAND JASPER-
249 PM EDT THU MAY 17 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF DORCHESTER...
HAMPTON...CHARLESTON...JASPER...COLLETON AND BEAUFORT COUNTIES
THROUGH 345 PM EDT...

AT 247 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM DELEMAR CROSSROADS
TO ASHEPOO...MOVING SOUTHEAST AT 5 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
ADAMS RUN...ASHEPOO...BEARS BLUFF...BEAUFORT...BEAUFORT MARINE CORPS
AIR STATION...BENNETTS POINT...BURTON...CLARENDON...COOSAWHATCHIE...
DALE...DELEMAR CROSSROADS...GARDENS CORNER...GRAHAMVILLE...GREEN
POND...HARDEEVILLE...HOLLYWOOD...JACKSONBORO...JASPER...JOHNS
ISLAND...LADYS ISLAND...LAUREL BAY...LEMON ISLAND...MAYBANK BRIDGE...
MEGGETT...OLD HOUSE...POCOTALIGO...PURYSBURGH...RAVENEL...
RIDGELAND...SHELDON...SWITZERLAND...TILLMAN...WADMALAW ISLAND...WHITE
HALL AND YONGES ISLAND...

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

HAIL TO DIME SIZE HAS BEEN REPORTED WITH SEVERAL THUNDERSTORMS
ALREADY THIS AFTERNOON.

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 3224 8110 3228 8113 3229 8112 3233 8114
      3234 8113 3236 8117 3240 8118 3244 8121
      3247 8119 3247 8120 3249 8122 3295 8020
      3272 7998
TIME...MOT...LOC 1849Z 321DEG 4KT 3285 8023 3275 8055

Special weather statement, May 17, 2:59 PM EDT, 1 hour 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
259 PM EDT THU MAY 17 2012

GAZ101-171930-
EFFINGHAM-
259 PM EDT THU MAY 17 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF EFFINGHAM COUNTY
THROUGH 330 PM EDT...

AT 256 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR STILLWELL  ... NEARLY STATIONARY.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
GUYTON...MARLOW...PINEORA...RINCON...SPRINGFIELD AND STILLWELL...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
PENNY SIZE HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING...
TORRENTIAL RAIN WHICH MAY PRODUCE LOCALIZED FLOODING...

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 3247 8123 3227 8114 3226 8115 3224 8119
      3222 8121 3215 8135 3240 8147
TIME...MOT...LOC 1900Z 045DEG 2KT 3234 8123

Special weather statement, May 17, 3:39 PM EDT, 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
339 PM EDT THU MAY 17 2012

GAZ118-119-SCZ047-051-172015-
COASTAL CHATHAM-COASTAL JASPER-INLAND CHATHAM-INLAND JASPER-
339 PM EDT THU MAY 17 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF JASPER AND CHATHAM
COUNTIES THROUGH 415 PM EDT...

AT 338 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR TALMADGE MEMORIAL BRIDGE...MOVING WEST AT
5 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
GARDEN CITY...HUTCHINSON ISLAND...PORT WENTWORTH...SAVANNAH AND
SAVANNAH HISTORIC DISTRICT...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 35 TO 45 MPH...
PENNY SIZE HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING...
TORRENTIAL RAIN WHICH MAY PRODUCE LOCALIZED FLOODING...

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 3205 8104 3201 8117 3219 8117 3217 8102
TIME...MOT...LOC 1939Z 090DEG 3KT 3211 8111

Special weather statement, May 17, 3:45 PM EDT, 38 minutes before

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Local storm report, May 17, 4:18 PM EDT, 5 minutes before

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Special weather statement, May 17, 4:23 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
May 17, 1:09 AM EDT	Special Marine Warning	CHS		111 min
May 17, 2:52 AM EDT	Special Marine Warning	CHS		93 min
May 17, 2:40 PM EDT	Special Weather Statement	CHS	McIntosh	35 min
May 17, 2:44 PM EDT	Special Weather Statement	CHS	Bryan	31 min
May 17, 2:56 PM EDT	Severe Thunderstorm Warning	CHS	McIntosh	47 min
May 17, 2:59 PM EDT	Special Weather Statement	CHS	Effingham	31 min
May 17, 3:29 PM EDT	Special Marine Warning	CHS		61 min
May 17, 3:39 PM EDT	Special Weather Statement	CHS	Chatham	36 min
May 17, 3:45 PM EDT	Special Weather Statement	CHS	Effingham	30 min
May 17, 3:53 PM EDT	Small Craft Advisory	CHS		4 days
May 17, 3:53 PM EDT	Severe Thunderstorm Warning	CHS	Bulloch, Effingham	67 min
May 17, 4:45 PM EDT	Areal Flood Advisory	CHS	Chatham	60 min
May 17, 4:51 PM EDT	Severe Thunderstorm Warning	CHS	Bulloch, Candler, Evans, Screven	54 min
May 17, 6:19 PM EDT	Special Weather Statement	CHS	Jenkins	41 min
May 17, 7:27 PM EDT	Special Weather Statement	CHS	Long	33 min
May 16, 8:03 PM EDT	Areal Flood Advisory	CHS	Berkeley	42 min
May 16, 8:27 PM EDT	Flash Flood Warning	CHS	Berkeley	2 hr
May 16, 9:20 PM EDT	Areal Flood Advisory	CHS	Charleston	2 hr
May 17, 1:25 AM EDT	Special Weather Statement	CHS	Charleston	50 min
May 17, 2:11 AM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston	3 hr
May 17, 3:19 AM EDT	Special Weather Statement	CHS	Charleston	26 min
May 17, 4:35 AM EDT	Areal Flood Advisory	CHS	Charleston	115 min
May 17, 12:53 PM EDT	Special Weather Statement	CHS	Berkeley	37 min
May 17, 1:12 PM EDT	Areal Flood Advisory	CHS	Berkeley, Dorchester	93 min
May 17, 1:25 PM EDT	Special Weather Statement	CHS	Dorchester	65 min
May 17, 1:29 PM EDT	Special Weather Statement	CHS	Hampton	61 min
May 17, 2:12 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston, Colleton, Dorchester	93 min
May 17, 2:32 PM EDT	Special Weather Statement	CHS	Colleton, Hampton	58 min
May 17, 2:49 PM EDT	Special Weather Statement	CHS	Jasper	56 min
May 17, 3:04 PM EDT	Severe Thunderstorm Warning	CHS	Charleston, Colleton	17 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.