Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 48, NWS Charleston, SC

June 19, 2015Chatham County, Georgia

NWS Charleston, SC issued this severe thunderstorm warning at Jun 19, 2015, 7:30 PM EDT for Chatham County, Georgia. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 19, 2015, 7:30 PM EDT (23:30 UTC)
Expired: Jun 19, 2015, 8:30 PM EDT
In force: 60 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Chatham County, GA

The radar

The Charleston,SC radar (KCLX), 76 km from the middle of the area, began a volume at 23:32 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, 11.5 hours before the alert went out and 145 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: 1825 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 948 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jun 19, 6:52 PM EDT, 38 minutes earlier.

Area forecast discussion, Jun 19, 6:52 PM EDT, 38 minutes before

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Hazardous weather outlook, Jun 19, 6:52 PM EDT, 38 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
652 PM EDT FRI JUN 19 2015

GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047>052-202300-
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-
652 PM EDT FRI JUN 19 2015

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

.DAY ONE...TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

EXCESSIVE HEAT...THE COMBINATION OF WELL ABOVE NORMAL TEMPERATURES
AND MODERATE LEVELS OF HUMIDITY WILL PRODUCE HEAT INDICES ABOVE
105 DEGREES EACH AFTERNOON INTO THE MIDDLE OF NEXT WEEK. HEAT
ADVISORIES ARE LIKELY EACH DAY. THIS IS A LONG AND POTENTIALLY
DANGEROUS HEAT WAVE AND PRECAUTIONS SHOULD BE TAKEN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ASSISTANCE IS NOT ANTICIPATED AT THIS TIME.

AMZ330-350-352-354-374-202300-
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-
652 PM EDT FRI JUN 19 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ASSISTANCE IS NOT ANTICIPATED AT THIS TIME.

In the hours before

Special weather statement, Jun 19, 4:32 PM EDT, 2 hours 58 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
432 PM EDT FRI JUN 19 2015

SCZ045-052-192100-
TIDAL BERKELEY SC-INLAND BERKELEY SC-TIDAL BERKELEY SC-
432 PM EDT FRI JUN 19 2015

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BERKELEY COUNTY UNTIL
500 PM EDT...

AT 432 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
NAVAL WEAPONS STATION CHARLESTON...MOVING EAST AT 15 MPH.

DIME SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
CHARLESTON...GOOSE CREEK...HANAHAN...NAVAL WEAPONS STATION
CHARLESTON...CAINHOY...DON HOLT BRIDGE AND WANDO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3299 7977 3295 7977 3292 7983 3291 7984
      3289 7985 3287 7996 3289 7997 3291 7995
      3291 7997 3298 8000 3309 7980 3300 7975
TIME...MOT...LOC 2032Z 251DEG 15KT 3293 7994

Special weather statement, Jun 19, 5:39 PM EDT, 1 hour 51 minutes before

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Special weather statement, Jun 19, 6:02 PM EDT, 1 hour 28 minutes before

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Special weather statement, Jun 19, 6:26 PM EDT, 1 hour 4 minutes before

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Special weather statement, Jun 19, 6:42 PM EDT, 48 minutes before

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Special weather statement, Jun 19, 7:24 PM EDT, 6 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
Jun 19, 3:45 PM EDT	Special Weather Statement	CHS	Jasper	30 min
Jun 19, 4:14 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Jasper	36 min
Jun 19, 4:32 PM EDT	Special Weather Statement	CHS	Charleston	28 min
Jun 19, 4:46 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	59 min
Jun 19, 5:39 PM EDT	Special Weather Statement	CHS	Berkeley	36 min
Jun 19, 7:52 PM EDT	Special Weather Statement	CHS	Hampton	53 min
Jun 19, 6:02 PM EDT	Special Weather Statement	CHS	McIntosh	43 min
Jun 19, 6:26 PM EDT	Special Weather Statement	CHS	Bulloch	34 min
Jun 19, 6:42 PM EDT	Special Weather Statement	CHS	McIntosh	33 min
Jun 19, 7:24 PM EDT	Special Weather Statement	CHS	Chatham	36 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2015 Every severe thunderstorm warning in 2015

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.