Alert archive / Georgia / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 7, NWS Jacksonville, FL

January 30, 20134 counties in Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Jan 30, 2013, 9:26 PM EST for 4 counties in Georgia. It was in force for 79 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
Jan 30, 2013, 9:26 PM EST (02:26 UTC)
Expired
Jan 30, 2013, 10:45 PM EST
In force
79 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Brantley County, GA, Camden County, GA, Glynn County, GA, Wayne County, GA

The radar

The Jacksonville radar (KJAX), 82 km from the middle of the area, began a volume at 02:30 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jan 30, 5:45 PM ESTTornado WatchSPC6 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 2.4 hours before the alert went out and 80 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, Jacksonville, FL at 00:00Z on 2013-01-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 77 joules per kilogram.LCLLFCEL10008507005003002001001 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, Jacksonville, FL at 00:00Z on 2013-01-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 229 square meters per square second.1939587897Sfc1 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
77 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1554 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
229 m²/s²
0-3 km storm-relative helicity
378 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jan 30, 8:56 PM EST, 30 minutes earlier.

Area forecast discussion, Jan 30, 8:56 PM EST, 30 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
856 PM EST WED JAN 30 2013

...TORNADO WATCH REMAINS IN EFFECT FOR PORTIONS OF THE AREA THIS
EVENING...

.UPDATE...
SQUALL LINE IS SLOWLY PROGRESSING THROUGH WESTERN PORTIONS OF
SOUTHEAST GEORGIA...AND THERE HAVE BEEN REPORTS OF A FEW TREES
DOWN ACROSS SOUTHEAST GEORGIA WITH THIS ACTIVITY. THE SQUALL LINE
HAS PROGRESSIVELY SHOWN SIGNS OF WEAKENING THIS EVENING AND THIS
WILL CONTINUE TO BE THE CASE AS WE MOVE THROUGH THE EVENING. A
VERY INTENSE 850MB LLJ OF 60 TO 70 KNOTS WILL CONTINUE TO SUPPORT
A FEW DAMAGING WIND GUSTS OVER THE NEXT HOUR OR SO...PRIMARILY
OVER THE WESTERN PORTIONS OF SOUTHEAST GEORGIA. SO FAR THERE HAVE
REALLY BEEN NO SIGNS OF ANY CIRCULATION WITH ANY OF THESE STORMS
AND THIS IS EXPECTED TO REMAIN THE CASE. THE TOR WATCH WILL LIKELY
BE DROPPED SOON. ELSEWHERE...STRONG WIND GUSTS UP TO AROUND 45 MPH
WILL BE POSSIBLE AS THE LINE CONTINUES EAST BUT SEVERE WEATHER IS
NOT EXPECTED.

WINDS WILL SHARPLY TURN TO THE NORTHWEST BEHIND THE WEAKENING
SQUALL LINE AND MUCH COLDER AND DRIER AIR WILL QUICKLY ADVECT INTO
THE REGION. THE COLD FRONT IS EXPECTED TO MOVE OFF THE ATLANTIC
COAST BY AROUND 6Z. NORTHWEST WINDS WILL REMAIN GUSTY BEHIND THE
COLD FRONT DURING THE EARLY MORNING HOURS. THE WIND AND LAKE WIND
ADVISORIES WERE EARLIER EXTENDED THROUGH THE EVENING TO ACCOUNT
FOR GUSTY WINDS AHEAD OF THE FRONT AND TO ALSO ACCOUNT FOR AN
INITIAL SURGE OF GUSTY WINDS BEHIND THE FRONT.

&&

.AVIATION...
A WEAKENING SQUALL LINE IS EXPECTED TO IMPACT THE TERMINALS
BETWEEN 4Z AND 6Z THIS EVENING WITH A QUICK SHOT OF RAIN AND GUSTY
WINDS. A BRIEF PERIOD OF MVFR CEILINGS WILL ACCOMPANY THE FRONT
THROUGH THE AREA. WINDS WILL SHARPLY TURN FROM THE SOUTH TO THE
NORTHWEST WITH THE PASSAGE OF THE SQUALL LINE WITH WINDY
CONDITIONS EXPECTED TO CONTINUE THROUGH THE NIGHT AS COLDER AIR
ADVECTS INTO THE REGION. MUCH DRIER AIR BEHIND THE COLD FRONT WILL
ALLOW FOR CLOUDS TO QUICKLY BREAK UP DURING THE EARLY MORNING
HOURS. VFR CONDITIONS WILL THEN PREVAIL THROUGH THURSDAY.

&&

.MARINE...
SOLID SMALL CRAFT ADVISORY CONDITIONS ARE ONGOING OVER THE COASTAL
WATERS THIS EVENING WITH SOUTHERLY WINDS OF 20 TO 30 KNOTS AND
SEAS OF 6 TO 9 FEET. SOUTHERLY WINDS WILL CONTINUE UNTIL A WEAK
SQUALL LINE MOVES OVER THE AREA DURING THE EARLY MORNING HOURS.
WINDS WILL THEN SHARPLY TURN TO THE NORTHWEST AND OCCASIONAL GUSTS
TO GALE FORCE WILL ACCOMPANY THE FRONT THROUGH THE AREA. WE WILL
CONTINUE TO COVER THIS WITH A SMALL CRAFT ADVISORY...AS THE HIGHEST
GUSTS WILL PRIMARILY BE ASSOCIATED WITH THE SHOWER ACTIVITY ALONG
THE COLD FRONT. OCCASIONAL GALE FORCE GUSTS WILL CONTINUE BEHIND
THE FRONT AS COLDER AND DRIER AIR QUICKLY ADVECTS OVER THE WATERS.

RIP CURRENTS: LOW RISK OF RIP CURRENTS.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  43  59  32  59 /  80   0   0   0
SSI  46  59  39  61 /  60   0   0   0
JAX  50  61  32  63 /  60   0   0   0
SGJ  51  61  39  63 /  60   0   0   0
GNV  49  62  30  65 /  60   0   0   0
OCF  52  63  32  67 /  60   0   0   0

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...WIND ADVISORY UNTIL 3 AM EST THURSDAY FOR BAKER-COLUMBIA-
     GILCHRIST-HAMILTON-SUWANNEE.

     LAKE WIND ADVISORY UNTIL 3 AM EST THURSDAY FOR ALACHUA-BRADFORD-
     CLAY-DUVAL-FLAGLER-MARION-NASSAU-PUTNAM-ST JOHNS-UNION.

     FIRE WEATHER WATCH FROM THURSDAY MORNING THROUGH THURSDAY
     EVENING FOR ALACHUA-BAKER-BRADFORD-CLAY-COLUMBIA-DUVAL-
     FLAGLER-GILCHRIST-HAMILTON-MARION-NASSAU-PUTNAM-ST JOHNS-
     SUWANNEE-UNION.

GA...WIND ADVISORY UNTIL 3 AM EST THURSDAY FOR APPLING-ATKINSON-BACON-
     BRANTLEY-CHARLTON-CLINCH-COFFEE-ECHOLS-JEFF DAVIS-PIERCE-
     WARE-WAYNE.

     LAKE WIND ADVISORY UNTIL 3 AM EST THURSDAY FOR COASTAL CAMDEN-
     COASTAL GLYNN-INLAND CAMDEN-INLAND GLYNN.

AM...SMALL CRAFT ADVISORY UNTIL 4 PM EST THURSDAY FOR ALTAMAHA SOUND
     GA TO FERNANDINA BEACH FL 20 NM TO 60 NM OFFSHORE-
     FERNANDINA BEACH TO ST AUGUSTINE FL 20 NM TO 60 NM OFFSHORE-
     ST AUGUSTINE TO FLAGLER BEACH FL 20 NM TO 60 NM OFFSHORE.

     SMALL CRAFT ADVISORY FOR WINDS UNTIL 11 AM EST THURSDAY FOR
     ALTAMAHA SOUND GA TO FERNANDINA BEACH FL OUT 20 NM-
     FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20 NM-ST AUGUSTINE
     TO FLAGLER BEACH FL OUT 20 NM.

&&

SHULER/SHASHY/
Hazardous weather outlook, Jan 30, 9:18 PM EST, 8 minutes before
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In the hours before

Local storm report, Jan 30, 8:28 PM EST, 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
828 PM EST WED JAN 30 2013

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

0810 PM     TSTM WND DMG     3 NW BROXTON            31.65N 82.92W
01/30/2013                   COFFEE             GA   EMERGENCY MNGR

            SEVERAL TREES WERE BLOWN DOWN NORHTWEST OF BROXTON.

&&

AENYEDI
Special weather statement, Jan 30, 8:43 PM EST, 43 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
843 PM EST WED JAN 30 2013

GAZ134>136-150-151-163-310215-
APPLING-BACON-CLINCH-PIERCE-WARE-WAYNE-
843 PM EST WED JAN 30 2013

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR NORTHWESTERN
WAYNE...NORTHERN WARE...WESTERN PIERCE...EASTERN APPLING...EASTERN
BACON AND NORTHERN CLINCH COUNTIES FOR STRONG WINDS VALID UNTIL 915
PM EST...

AT 842 PM EST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG SHOWERS AND THUNDERSTORMS CENTERED ALONG A LINE EXTENDING
FROM 16 MILES NORTHWEST OF SURRENCY TO 9 MILES WEST OF MANOR...
MOVING EAST AT 45 MPH. THESE STRONG THUNDERSTORMS WILL AFFECT AREAS
AROUND NEW LACY...MANOR...DIXIE UNION...WARESBORO...SURRENCY...
NEEDHAM...WAYCROSS...SUNNYSIDE...DEENWOOD AND BRISTOL THROUGH 915 PM
EST. GUSTY WINDS OF 40 TO 55 MPH CAN BE EXPECTED ALONG WITH POSSIBLE
MINOR WIND DAMAGE.

REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM EST THURSDAY MORNING
FOR NORTHERN FLORIDA AND SOUTHEAST GEORGIA.

LAT...LON 3191 8213 3189 8212 3190 8211 3187 8210
      3179 8197 3122 8222 3122 8228 3119 8228
      3118 8224 3102 8231 3101 8268 3191 8223
TIME...MOT...LOC 0142Z 260DEG 39KT 3193 8228 3110 8268

SHASHY
Local storm report, Jan 30, 8:52 PM EST, 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
852 PM EST WED JAN 30 2013

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

0835 PM     TSTM WND GST     HOMERVILLE              31.04N 82.75W
01/30/2013  E0 MPH           CLINCH             GA   AWOS

            THUNDERSTORM WIND GUST OF 49 MPH

0835 PM     TSTM WND GST     HOMERVILLE              31.04N 82.75W
01/30/2013  E49 MPH          CLINCH             GA   AWOS

&&

AWALKER
Local storm report, Jan 30, 9:02 PM EST, 24 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE JACKSONVILLE FL
902 PM EST WED JAN 30 2013

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

0835 PM     TSTM WND GST     HOMERVILLE              31.04N 82.75W
01/30/2013  M49.00 MPH       CLINCH             GA   AWOS

&&
CORRECTED PREVIOUS LSR AND INDICATED MEASURED REPORTED.

ARS
Special weather statement, Jan 30, 9:17 PM EST, 9 minutes before
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Special weather statement, Jan 30, 9:24 PM EST, 2 minutes before
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The office that day

Everything else NWS Jacksonville, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 30, 8:29 PM ESTSevere Thunderstorm WarningJAXHamilton46 min
Jan 30, 8:54 PM ESTSevere Thunderstorm WarningJAXSuwannee51 min
Jan 30, 9:17 PM ESTSpecial Weather StatementJAXColumbia, Suwannee43 min
Jan 30, 9:24 PM ESTSpecial Weather StatementJAXHamilton51 min
Jan 30, 10:08 PM ESTSpecial Weather StatementJAXAlachua, Baker, Bradford, Gilchrist, Union52 min
Jan 30, 10:23 PM ESTSpecial Marine WarningJAX3 hr
Jan 30, 10:42 PM ESTSpecial Weather StatementJAXNassau33 min
Jan 30, 10:46 PM ESTSpecial Weather StatementJAXAlachua, Bradford, Clay, Duval, Putnam44 min
Jan 30, 10:49 PM ESTSpecial Marine WarningJAX3 hr
Jan 30, 11:12 PM ESTSpecial Weather StatementJAXClay, Duval, Putnam48 min
Jan 31, 2:32 AM ESTFreeze WatchJAXBaker, Bradford, Gilchrist, Nassau, Suwannee, Union11 hr
Jan 31, 3:16 AM ESTFire Weather WatchJAXBaker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more23 hr
Jan 31, 3:16 AM ESTRed Flag WarningJAXBaker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more16 hr
Jan 31, 1:33 PM ESTFreeze WatchJAXBaker, Bradford, Gilchrist, Nassau, Suwannee, Union23 hr
Jan 31, 1:33 PM ESTFreeze WarningJAXBaker, Bradford, Gilchrist, Nassau, Suwannee, Union19 hr
Jan 30, 7:20 PM ESTSpecial Weather StatementJAXCoffee35 min
Jan 30, 7:39 PM ESTSevere Thunderstorm WarningJAXAppling, Atkinson, Bacon, Clinch, Coffee, Jeff Davis and 1 more36 min
Jan 30, 8:14 PM ESTSevere Thunderstorm WarningJAXAppling, Atkinson, Bacon, Clinch, Coffee, Jeff Davis and 1 more46 min
Jan 30, 8:43 PM ESTSpecial Weather StatementJAXAppling, Pierce, Ware32 min
Jan 30, 8:52 PM ESTSevere Thunderstorm WarningJAXAppling, Bacon, Brantley, Charlton, Clinch, Pierce and 2 more38 min
Jan 30, 9:07 PM ESTSevere Thunderstorm WarningJAXCharlton, Clinch, Echols, Ware38 min
Jan 30, 9:39 PM ESTSpecial Weather StatementJAXCamden51 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2013Every severe thunderstorm warning in 2013

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.