Alert archive / Georgia / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 155, NWS Charleston, SC

July 22, 2006Screven County, Georgia; Allendale County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Jul 22, 2006, 5:56 PM EDT for Screven County, Georgia; Allendale County, South Carolina. It was in force for 64 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
Jul 22, 2006, 5:56 PM EDT (21:56 UTC)
Expired
Jul 22, 2006, 7:00 PM EDT
In force
64 min
Issued by
NWS Charleston, SC
Area
Counties, with a storm outline in the text

Counties Screven County, GA, Allendale County, SC

The radar

The Charleston,SC radar (KCLX), 48 km from the middle of the area, began a volume at 22:00 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, 9.9 hours before the alert went out and 139 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-pSkew-T log-p diagram, Charleston AFB, SC at 12:00Z on 2006-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1867 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2006-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -67 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1867 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
639 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-67 m²/s²
0-3 km storm-relative helicity
-18 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 Jul 22, 2:47 PM EDT, 3 hours 9 minutes earlier.

Area forecast discussion, Jul 22, 2:47 PM EDT, 3 hours 9 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
247 PM EDT SAT JUL 22 2006

.SHORT TERM /TONIGHT THRU SUN NIGHT/...SH/TSTMS BEGINNING TO BECOME
MORE WIDESPREAD THIS AFTN...ESPCLY ACROSS SE GA WHERE THE BEST
INSTABILITY LIES. HOWEVER...MUCH MORE ACTIVITY IS FIRING UP ALONG
AND AHEAD OF THE SFC FRONT BACK ACROSS AL/MS. XPCT THE MAJORITY OF
ACTIVITY ACROSS OUR AREA TO REMAIN INLAND ALONG AND W OF THE SEA
BREEZE. THUS...WILL KEEP 50 POPS INLAND WITH 40S FOR THE COASTAL
COUNTIES. THERE IS STILL THE THREAT FOR SOME SEVERE STORMS TO DVLP
THIS AFTN/EVE WITH DAMAGING WINDS IN EXCESS OF 60 MPH AND EXCESSIVE
LIGHTNING THE MAIN HAZARDS...ALTHO PENNY SIZE OR LARGER HAIL IS ALSO
POSSIBLE. WILL NEED TO KEEP LOW END CHC POPS GOING ALL NIGHT WITH
SUCH A WARM AND HUMID AIRMASS IN PLACE. LOWS WILL RANGE FROM THE MID
70S INLAND TO AROUND 80 ALONG THE COAST. WITH THE SFC COLD FRONT
SHIFTING E BUT STILL W OF THE AREA TOMORROW...XPCT ANOTHER ROUND OF
SH/TSTMS TO FIRE UP. WILL BUMP POPS UP INTO THE LIKELY RANGE /60S/
FOR INLAND AREAS WITH 50S ALONG THE COAST. HIGHS WILL BE AROUND 90
INLAND WITH MID/UPPER 80S NEAR THE COAST. LOW END CHC POPS CONTINUE
TOMORROW NIGHT WITH THE FRONT NEARBY. LOWS WILL RANGE FROM THE LOW
70S INLAND TO AROUND 80 ALONG THE COAST.
&&

.LONG TERM /MON THROUGH SAT/...MAIN UPPER LEVEL ENERGY WILL MOVE OUT
THROUGH NEW ENGLAND BY MONDAY...BUT A WEAK TROF BOTH ALOFT AND AT
THE SURFACE WILL PROVIDE ENOUGH LIFT TO ALLOW SCATTERED DIURNAL
THUNDERSTORMS TO CONTINUE THROUGH THE WEEK WITH NEAR TO SLIGHTLY
ABOVE NORMAL POPS. ATMOSPHERE MAY DRY OUT A BIT BY NEXT
WEEKEND...BUT A THREAT OF AFTERNOON AND EVENING THUNDERSTORMS WILL
CONTINUE...JUST WENT WITH SLIGHTLY LOWER POPS.
&&

.AVIATION...SH/TSTMS HAVE REMAINED W OF THE TERMS THIS AFTN ALONG
THE SEA BREEZE. THIS SHUD CONTINUE TO BE THE CASE MUCH OF THE
NIGHT...ALTHO KSAV HAS THE BEST CHC OF SEEING SOME OF THIS ACTIVITY
SO HAD INCLUDED A VCTS FOR LATER THIS EVE WITH THE 18Z TAFS. WILL
CONTINUE TO MONITOR RADAR TRENDS AND AMEND AS NEEDED. MORE SH/TSTMS
ARE XPCTD TONIGHT/TOMORROW BUT TIMING/COVERAGE TOO DIFFICULT TO PIN
DOWN AT THIS POINT.
&&

.MARINE...DECENT DAY ACROSS THE MARINE AREA WITH WINDS GENERALLY AOB
15 KT...XCPT ALONG THE IMMEDIATE COAST WHERE WINDS ARE 15-20 KT AS
THE SEA BREEZE HAS KICKED IN. WITH THE EXCEPTION OF CHS
HARBOR...WHERE WE WILL INITIALIZE WITH A SCSEC HEADLINE. ALL IN
ALL...XPCT WINDS/SEAS TO REMAIN AOB HEADLINE CRITERIA THRU SUN
NIGHT.

PERSISTENT SOUTHWESTERLY FLOW AROUND BERMUDA HIGH TO THE EAST WILL
KEEP WINDS AND SEAS FLIRTING WITH SCEC CRITERIA...ESPECIALLY IN THE
OFFSHORE WATERS. SCATTERED NIGHTTIME CONVECTION IS EXPECTED AS WELL.
&&

.RIP CURRENTS...WILL CONTINUE THE MODERATE RISK OF RIP CURRENTS FOR
SUN.
&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...NONE.
SC...NONE.
MARINE...NONE.
&&

RJB/FWA
Hazardous weather outlook, Jul 22, 4:30 AM EDT, 13 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
430 AM EDT SAT JUL 22 2006

AMZ330-350-352-354-374-GAZ087-088-099>101-114>119-137>141-SCZ040-
042>045-047>051-231000-
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-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-BERKELEY-
INLAND JASPER-BEAUFORT-COASTAL COLLETON-CHARLESTON-COASTAL
JASPER-
430 AM EDT SAT JUL 22 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH CAROLINA...
SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS FROM THE SOUTH
SANTEE RIVER SOUTH CAROLINA TO ALTAMAHA SOUND GEORGIA.

.DAY ONE...TODAY AND TONIGHT.
.SEVERE THUNDERSTORMS...THERE IS A SLIGHT RISK OF A FEW SEVERE
THUNDERSTORMS ACROSS SOUTHEAST GEORGIA AND SOUTHERN SOUTH CAROLINA
THIS AFTERNOON AND EVENING. THE PRIMARY THREATS WILL BE LARGE HAIL
AND DAMAGING WINDS. REFER TO THE SEVERE WEATHER OUTLOOK ISSUED BY
THIS OFFICE FOR MORE INFORMATION.

.RIP CURRENTS...THERE IS A MODERATE RISK OF RIP CURRENTS TODAY.
REFER TO THE LATEST SURF ZONE FORECAST FOR ADDITIONAL DETAILS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
.RIP CURRENTS...AN ELEVATED RISK OF RIP CURRENTS IS POSSIBLE ON
SUNDAY.

.SPOTTER INFORMATION STATEMENT...
SKYWARN SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON OR
EVENING.

JRL

In the hours before

Special weather statement, Jul 22, 4:26 PM EDT, 1 hour 30 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
426 PM EDT SAT JUL 22 2006

GAZ100-101-222115-
BULLOCH-EFFINGHAM-
426 PM EDT SAT JUL 22 2006

...STRONG THUNDERSTORMS WILL IMPACT EFFINGHAM COUNTY AND BULLOCH
COUNTY THROUGH 515 PM EDT...

AT 426 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 5 MILES NORTH OF STILSON...OR ABOUT 9
MILES WEST OF SPRINGFIELD...MOVING NORTHWEST AT 10 MPH.

THIS STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...
BROOKLET...EGYPT...LEEFIELD AND STILSON THROUGH 515 PM EDT.

HAIL UP TO ONE HALF INCH IN DIAMETER...EXCESSIVE CLOUD-TO-GROUND
LIGHTNING AND GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED.
Special weather statement, Jul 22, 5:00 PM EDT, 56 minutes before
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Special weather statement, Jul 22, 5:11 PM EDT, 45 minutes before
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Local storm report, Jul 22, 5:12 PM EDT, 44 minutes before
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Local storm report, Jul 22, 5:41 PM EDT, 15 minutes before
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Special weather statement, Jul 22, 5:46 PM EDT, 10 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 6:27 AM EDTMarine Weather StatementCHS3 hr
Jul 22, 10:57 AM EDTSpecial Marine WarningCHS63 min
Jul 22, 4:36 PM EDTSevere Thunderstorm WarningCHSCandler54 min
Jul 22, 4:43 PM EDTSevere Thunderstorm WarningCHSBulloch62 min
Jul 22, 6:46 PM EDTSevere Thunderstorm WarningCHSHampton31 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2006Severe Thunderstorm Warnings in South Carolina, 2006Every severe thunderstorm warning in 2006

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.