Alert archive / Florida / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 27, NWS Jacksonville, FL

April 2, 2009Columbia County, Hamilton County, Suwannee County, Florida; Clinch County, Echols County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 2, 2009, 7:35 PM EDT for Columbia County, Hamilton County, Suwannee County, Florida; Clinch County, Echols County, Georgia. It was in force for 55 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
Apr 2, 2009, 7:35 PM EDT (23:35 UTC)
Expired
Apr 2, 2009, 8:30 PM EDT
In force
55 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Columbia County, FL, Hamilton County, FL, Suwannee County, FL, Clinch County, GA, Echols County, GA

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 2, 3:00 PM EDTTornado WatchSPC7 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 11.6 hours before the alert went out and 108 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 12:00Z on 2009-04-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 785 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 12:00Z on 2009-04-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 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
785 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
560 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
411 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.8

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 Apr 2, 2:30 PM EDT, 5 hours 5 minutes earlier.

Area forecast discussion, Apr 2, 2:30 PM EDT, 5 hours 5 minutes before
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Hazardous weather outlook, Apr 2, 3:37 PM EDT, 3 hours 58 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE JACKSONVILLE FL
337 PM EDT THU APR 2 2009

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-031000-
HAMILTON-SUWANNEE-COLUMBIA-BAKER-NASSAU-DUVAL-UNION-BRADFORD-CLAY-
ST JOHNS-GILCHRIST-ALACHUA-PUTNAM-FLAGLER-MARION-COFFEE-
JEFF DAVIS-BACON-APPLING-WAYNE-ATKINSON-WARE-PIERCE-BRANTLEY-
INLAND GLYNN-COASTAL GLYNN-ECHOLS-CLINCH-CHARLTON-INLAND CAMDEN-
COASTAL CAMDEN-
337 PM EDT THU APR 2 2009

THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA.

.DAY ONE...TONIGHT...

...TORNADO WATCH IN EFFECT UNTIL 10 PM FOR ALL OF SOUTHEAST GEORGIA
AND MUCH OF NORTHEAST FLORIDA...

...FLOOD WATCH IN EFFECT FOR ALL OF SOUTHEAST GEORGIA AND MOST OF
NORTHEAST FLORIDA INCLUDING THE ADJACENT COASTAL WATERS THROUGH
FRIDAY MORNING...

...AREAL FLOOD WARNINGS IN EFFECT FOR MUCH OF SOUTHEAST GEORGIA AND
UPPER SUWANNEE VALLEY REGION...

A TORNADO WATCH IS IN EFFECT FOR ALL OF SOUTHEAST GEORGIA AND MOST
OF NORTHEAST FLORIDA THROUGH 10 PM THIS EVENING. A VERY DANGEROUS
SITUATION IS EXPECTED TO SET UP THIS EVENING WITH NUMEROUS SEVERE
THUNDERSTORMS DEVELOPING ACROSS THE SUWANNEE RIVER VALLEY AND ACROSS
SOUTHEAST GEORGIA. A SQUALL LINE MOVING THROUGH THE GULF COAST
REGION WILL ALSO BE APPROACHING THE AREA THIS EVENING. DAMAGING
WINDS AND LARGE HAIL ALONG WITH ISOLATED TORNADOES ARE EXPECTED WITH
THE STORMS THIS EVENING. SEVERE THUNDERSTORMS WILL REMAIN POSSIBLE
THROUGH THE OVERNIGHT HOURS BUT WILL LIKELY BECOME MORE ISOLATED
TOWARD FRIDAY MORNING AS THE COLD FRONT SWEEPS TOWARD THE REGION.

A FLOOD WATCH CONTINUES FOR MOST OF THE FORECAST AREA. A FRONTAL
BOUNDARY REMAINS STALLED OVER THE AREA. NUMEROUS SHOWERS AND
THUNDERSTORMS ARE EXPECTED TO PRODUCE AN ADDITIONAL 2 TO 4 INCHES OF
RAIN POSSIBLE BY EARLY FRIDAY MORNING. THIS ADDITIONAL RAINFALL MAY
CAUSE LOCALIZED FLOODING. MUCH OF SOUTHEAST GEORGIA AND THE UPPER
SUWANNEE VALLEY REGION ARE UNDER AN AREAL FLOOD WARNING.

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

...FLOOD WARNINGS FOR VARIOUS RIVERS ACROSS SOUTHEAST GEORGIA AND
NORTHEAST FLORIDA...

RECENT HEAVY RAINFALL OVER PORTIONS OF SOUTHEAST GEORGIA WILL  RESULT
IN SIGNIFICANT RISES TO AREA RIVERS. FLOOD WARNINGS ARE IN EFFECT
FOR THE ALAPAHA RIVER AT STATENVILLE...ALTAMAHA RIVER AT CHARLOTTE...
SATILLA RIVER AT ATKINSON...ALTAMAHA RIVER AT BAXLEY...SATILLA RIVER
AT WAYCROSS...ST MARYS RIVER AT MACCLENNY. REFER TO THE FLOOD STATEMENT
THAT HAS BEEN ISSUED.

ANOTHER COLD FRONT WILL APPROACH THE AREA BRINGING A CHANCE OF
SHOWERS AND THUNDERSTORMS SUNDAY INTO EARLY MONDAY.

STAY TUNED TO THE NATIONAL WEATHER SERVICE FOR UPDATED STATEMENTS
AND POSSIBLE ADDITIONAL WARNINGS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS REQUESTED IN ALL AREAS UNDER THE TORNADO WATCH
AND FLOOD WATCH.

FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE
IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX.

PP

In the hours before

Local storm report, Apr 2, 3:10 PM EDT, 4 hours 25 minutes before
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Local storm report, Apr 2, 3:20 PM EDT, 4 hours 15 minutes before
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Special weather statement, Apr 2, 3:20 PM EDT, 4 hours 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
320 PM EDT THU APR 2 2009

FLZ035-022000-
GILCHRIST-
320 PM EDT THU APR 2 2009

...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR GILCHRIST COUNTY
FOR STRONG WINDS VALID UNTIL 400 PM EDT...

AT 320 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS CENTERED 4 MILES NORTHWEST OF BELL...MOVING EAST AT 40
MPH. THESE STRONG THUNDERSTORMS WILL ALSO AFFECT AREAS AROUND BELL
THROUGH 400 PM EDT. GUSTY WINDS OF 45 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 1000 PM EDT THURSDAY EVENING
FOR NORTHEASTERN FLORIDA AND SOUTHEAST GEORGIA.

LAT...LON 2983 8267 2962 8267 2964 8294 2976 8293
      2989 8285
TIME...MOT...LOC 1920Z 263DEG 45KT 2981 8290

ZIBURA
Special weather statement, Apr 2, 3:53 PM EDT, 3 hours 42 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
353 PM EDT THU APR 2 2009

GAZ152>154-165-166-022100-
BRANTLEY-COASTAL CAMDEN-COASTAL GLYNN-INLAND CAMDEN-INLAND GLYNN-
353 PM EDT THU APR 2 2009

...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR EASTERN
BRANTLEY...NORTHERN CAMDEN AND GLYNN COUNTIES FOR FUNNEL CLOUDS
VALID UNTIL 500 PM EDT...

AT 353 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS CENTERED ALONG A LINE EXTENDING FROM 4 MILES EAST OF
WAYNESVILLE TO 5 MILES WEST OF WAVERLY...MOVING EAST AT 20 MPH. THESE
STRONG THUNDERSTORMS WILL ALSO AFFECT AREAS AROUND WAYNESVILLE...
THALMANN...WAVERLY...DOCK JUNCTION...BOYS ESTATE...BRUNSWICK...
COUNTRY CLUB ESTATES...ST. SIMONS...SEA ISLAND AND LITTLE ST. SIMMONS
ISLAND THROUGH 500 PM EDT. GUSTY WINDS OF 35 TO 50 MPH CAN BE
EXPECTED ALONG WITH POSSIBLE MINOR DAMAGE. DOPPLER RADAR HAS
INDICATED WEAK ROTATION WITHIN THIS STORM. TORNADOES MAY DEVELOP WITH
LITTLE OR NO ADVANCE WARNING.

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT THURSDAY EVENING
FOR NORTHEASTERN FLORIDA AND SOUTHEAST GEORGIA.

LAT...LON 3120 8129 3121 8131 3113 8137 3114 8143
      3110 8147 3109 8145 3113 8141 3105 8140
      3105 8141 3104 8187 3133 8176 3134 8146
      3130 8140 3131 8139 3133 8136 3130 8128
      3127 8126
TIME...MOT...LOC 1953Z 253DEG 19KT 3124 8172 3109 8179

ENYEDI
Local storm report, Apr 2, 5:41 PM EDT, 1 hour 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
541 PM EDT THU APR 02 2009

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

0445 PM     FLOOD            BLACKSHEAR              31.30N 82.24W
04/02/2009                   PIERCE             GA   AMATEUR RADIO

            AN AMATEUR RADIO OPERATOR REPORTED HEAVY RAIN IN
            BLACKSHEAR WITH A NUMBER OF ROADS CLOSED DUE TO HIGH
            WATER.

&&

PP
Special weather statement, Apr 2, 7:18 PM EDT, 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
718 PM EDT THU APR 2 2009

FLZ020>022-GAZ162-163-030000-
CLINCH-COLUMBIA-ECHOLS-HAMILTON-SUWANNEE-
718 PM EDT THU APR 2 2009

...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR SUWANNEE...
COLUMBIA...HAMILTON...CLINCH AND ECHOLS COUNTIES FOR STRONG WINDS...
HAIL AND EXCESSIVE LIGHTNING VALID UNTIL 800 PM EDT...

AT 711 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS IN A LINE FROM NEAR MOULTRIE GEORGIA SOUTH TO WESTERN
MADISON AND WESTERN TAYLOR COUNTIES. MOVEMENT IS TO THE EAST AT 50
MPH. DAMAGING WINDS ARE POSSIBLE WITH WINDS GUSTING UP TO 60
MPH...ALONG WITH HAIL AND EXCESSIVE LIGHTNING. WIND DAMAGE IS
POSSIBLE ALONG WITH HEAVY RAINFALL THAT WILL PRODUCE PONDING OF
WATER ON ROADWAYS AND MINOR FLOODING OF LOW-LYING AREAS.
SUWANNEE...COLUMBIA...HAMILTON...ECHOLS...AND CLINCH COUNTIES WILL
BE AFFECTED BETWEEN 730 AND 830 PM. SEVERE THUNDERSTORM WARNINGS WILL
LIKELY BE ISSUED SOON.

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT THURSDAY EVENING
FOR NORTHEASTERN FLORIDA AND SOUTHEAST GEORGIA.

LAT...LON 3102 8262 3055 8249 2999 8258 2998 8285
      3015 8320 3042 8317 3062 8325 3060 8313
      3079 8312 3086 8296 3109 8295
TIME...MOT...LOC 2311Z 263DEG 45KT 3028 8322

ZIBURA

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 1, 9:04 PM EDTAreal Flood AdvisoryJAXBaker, Columbia, Hamilton, Suwannee116 min
Apr 1, 9:08 PM EDTSpecial Weather StatementJAXHamilton22 min
Apr 2, 5:01 AM EDTSpecial Weather StatementJAXHamilton44 min
Apr 2, 5:12 AM EDTSmall Craft AdvisoryJAX31 hr
Apr 2, 10:00 AM EDTRiver Flood WarningJAXBaker, Nassau8 days
Apr 2, 3:02 PM EDTAreal Flood WarningJAXHamilton, Suwannee4 hr
Apr 2, 3:20 PM EDTSpecial Weather StatementJAXGilchrist40 min
Apr 2, 3:29 PM EDTAreal Flood WarningJAXBaker, Columbia, Union4 hr
Apr 2, 7:16 PM EDTAreal Flood WarningJAXColumbia, Hamilton, Suwannee15 hr
Apr 2, 7:18 PM EDTSpecial Weather StatementJAXColumbia, Hamilton, Suwannee42 min
Apr 2, 7:58 PM EDTSpecial Weather StatementJAXBaker, Union62 min
Apr 1, 10:45 PM EDTSpecial Weather StatementJAXCamden30 min
Apr 2, 3:27 AM EDTSpecial Weather StatementJAXClinch, Echols48 min
Apr 2, 3:59 AM EDTAreal Flood AdvisoryJAXClinch, Echols, Ware2 hr
Apr 2, 10:33 AM EDTAreal Flood WarningJAXAppling, Atkinson, Bacon, Coffee, Jeff Davis, Ware3 hr
Apr 2, 10:48 AM EDTSevere Thunderstorm WarningJAXCoffee42 min
Apr 2, 10:57 AM EDTSpecial Weather StatementJAXAtkinson48 min
Apr 2, 11:29 AM EDTSpecial Weather StatementJAXAtkinson, Coffee, Jeff Davis46 min
Apr 2, 11:58 AM EDTAreal Flood WarningJAXPierce, Wayne92 min
Apr 2, 12:38 PM EDTSpecial Weather StatementJAXBacon52 min
Apr 2, 1:23 PM EDTAreal Flood WarningJAXAppling, Atkinson, Bacon, Clinch, Coffee, Echols and 4 more6 hr
Apr 2, 3:48 PM EDTAreal Flood AdvisoryJAXCamden, Glynn4 hr
Apr 2, 3:53 PM EDTSpecial Weather StatementJAXGlynn67 min
Apr 2, 7:53 PM EDTSpecial Weather StatementJAXAtkinson, Bacon, Coffee52 min

Nearby

Severe Thunderstorm Warnings in Florida, 2009Severe Thunderstorm Warnings in Georgia, 2009Every severe thunderstorm warning in 2009

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.