Alert archive / Florida / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 232, NWS Jacksonville, FL

August 25, 2007Flagler County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Aug 25, 2007, 5:44 PM EDT for Flagler County, Florida. It was in force for 31 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
Aug 25, 2007, 5:44 PM EDT (21:44 UTC)
Expired
Aug 25, 2007, 6:15 PM EDT
In force
31 min
Issued by
NWS Jacksonville, FL
Area
Counties, with a storm outline in the text

County Flagler County, FL

The radar

The Jacksonville radar (KJAX), 119 km from the middle of the area, began a volume at 21:47 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.7 hours before the alert went out and 135 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, Cape Canaveral, FL at 12:00Z on 2007-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 792 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, Cape Canaveral, FL at 12:00Z on 2007-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
792 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1071 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
4 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 Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 25, 2:10 PM EDT, 3 hours 34 minutes earlier.

Area forecast discussion, Aug 25, 2:10 PM EDT, 3 hours 34 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
210 PM EDT SAT AUG 25 2007

.SHORT TERM...SCTD/NMRS SHRA/TSRA THIS AFTN SHOULD
GRADUALLY DIMINISH WITH LOSS OF HEATING AND LACK OF
DYNAMIC SUPPORT...WILL DECREASE POPS TO 20 BY LATE
TNGT...THEN INCREASE BACK TO LIKELY TMRW AFTN GIVEN
VERY MOIST AIRMASS AND WEAK SHEAR AXIS WITHIN UPPER
RIDGE. WILL CONTINUE PREV FORECAST TEMPS WITH HIGHS
SUN AROUND 90/LWR 90S AND LOWS IN LOW/MID 70S. WILL
INCLUDE PATCHY FOG IN FORECAST FOR LATE TNGT.

.LONG TERM...NO SIG CHANGES THROUGH THE MEDIUM RANGE.
HIGH PRESSURE ALOFT OVER SOUTHEASTERN STATES MON/TUE
REPLACED WITH WEAK TROUGH WED-FRI. SHOULD SEE CONTINUED
RAIN CHANCES THROUGH WORKWEEK...MAXIMIZED IN THE AFTN
WITH MINIMUM LATE AT NIGHT. LITTLE TEMP CHANGE IN FCST
WITH HIGHS AROUND 90S/LWR 90S AND LOWS IN LOW/MID 70S.

&&

.AVIATION...THIS MORNINGS SHOWER ACTIVITY WILL LIMIT AFTERNOON
DEVELOPMENT...ALTHOUGH MVFR TO IFR CONDITIONS WILL STILL BE POSSIBLE
IN TS. THE MAIN ACTIVITY WILL BE IN AREAS SOUTH OF KJAX AND KVLD
CLEARING AFT 03Z. PATCHY MIFG WILL DEVELOP AFT 06Z AND DISSIPATE BY
14Z.

&&

.MARINE...BUOY OBS ARE GENERALLY READING SEAS OF 3 TO 4 FEET AND
SOME EAST TO SOUTHEASTERLY SWELL WILL LINGER THIS AFTERNOON. BY
EARLY NEXT WEEK SEAS WILL LOWER TO 2 TO 3 FEET AS HIGH PRESSURE
BUILDS BACK OVER THE AREA. NO HEADLINES ARE EXPECTED AT THIS TIME.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  73  93  72  92 /  30  60  30  50
SSI  76  88  77  89 /  20  50  20  50
JAX  74  90  74  91 /  20  60  20  50
SGJ  75  89  75  89 /  20  60  20  50
GNV  73  91  72  91 /  40  60  20  50
OCF  73  91  73  91 /  50  60  20  50

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
GA...NONE.
AM...NONE.
&&

WOLF/HURLBUT/WALKER
Hazardous weather outlook, Aug 25, 5:02 AM EDT, 12 hours 42 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
502 AM EDT SAT AUG 25 2007

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-260915-
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-
502 AM EDT SAT AUG 25 2007

THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA.

.DAY ONE...TODAY AND TONIGHT...

...MODERATE RISK OF RIP CURRENTS AT AREA BEACHES TODAY...

LONG PERIOD SWELLS WILL CONTINUE A MODERATE RISK OF RIP CURRENTS AT
AREA BEACHES. REFER TO THE SURF ZONE FORECAST FOR MORE DETAILS.

INCREASED SHOWER AND THUNDERSTORM ACTIVITY IS EXPECTED TODAY WITH
NUMEROUS STORMS DEVELOPING BY AFTERNOON ACROSS SOUTHERN SECTIONS
OF THE FORECAST AREA AND EXTENDING NORTHWARD ALONG INTERSTATE 75. SOME
THUNDERSTORMS MAY BE STRONG WITH GUSTY WINDS...LOCALLY HEAVY
RAINFALL...AND FREQUENT LIGHTNING THE MAIN THREATS. ADDITIONALLY...ATMOSPHERIC
CONDITIONS ARE SUPPORTIVE OF BRIEF WATERSPOUTS WITH THE MORE
INTENSE SHOWERS AND STORMS THAT DEVELOP OVER THE COASTAL WATERS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

A SURFACE TROUGH JUST TO THE NORTH OF THE AREA WILL SUPPORT NUMEROUS
SHOWERS AND THUNDERSTORMS OVER THE AREA ON SUNDAY AFTERNOON WITH
LOCALLY STRONG STORMS POSSIBLE ONCE AGAIN. THE FOCUS WILL SHIFT TO
SOUTHEAST GEORGIA PRIMARILY FOR EARLY NEXT WEEK WITH CONTINUED
HEAVY RAINFALL...GUSTY WINDS...AND FREQUENT LIGHTNING THE PRIMARY
THREAT IN THE STRONGER ACTIVITY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

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

DEESE

In the hours before

Special weather statement, Aug 25, 4:32 PM EDT, 1 hour 12 minutes before
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Special weather statement, Aug 25, 4:42 PM EDT, 1 hour 2 minutes before
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Special weather statement, Aug 25, 4:57 PM EDT, 47 minutes before
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Local storm report, Aug 25, 5:15 PM EDT, 29 minutes before
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Local storm report, Aug 25, 5:26 PM EDT, 18 minutes before
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Local storm report, Aug 25, 5:44 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 25, 2:58 PM EDTSevere Thunderstorm WarningJAXAlachua29 min
Aug 25, 3:35 PM EDTSevere Thunderstorm WarningJAXPutnam25 min
Aug 25, 3:51 PM EDTSevere Thunderstorm WarningJAXSuwannee24 min
Aug 25, 3:58 PM EDTSevere Thunderstorm WarningJAXPutnam32 min
Aug 25, 4:12 PM EDTSevere Thunderstorm WarningJAXHamilton33 min
Aug 25, 4:19 PM EDTSevere Thunderstorm WarningJAXMarion41 min
Aug 25, 5:00 PM EDTSevere Thunderstorm WarningJAXFlagler45 min
Aug 25, 6:02 PM EDTSevere Thunderstorm WarningJAXJeff Davis28 min

Nearby

Severe Thunderstorm Warnings in Florida, 2007Every severe thunderstorm warning in 2007

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.