Alert archive / Florida / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 85, NWS Jacksonville, FL

June 12, 2007Flagler County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 12, 2007, 11:27 AM EDT for Flagler County, Florida. It was in force for 63 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 12, 2007, 11:27 AM EDT (15:27 UTC)
Expired
Jun 12, 2007, 12:30 PM EDT
In force
63 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 15:28 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
Jun 12, 8:25 AM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 3.5 hours before the alert went out and 121 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 2007-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1068 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 2007-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.193958Sfc1 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
1068 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
674 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.4

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 Jun 12, 8:42 AM EDT, 2 hours 45 minutes earlier.

Area forecast discussion, Jun 12, 8:42 AM EDT, 2 hours 45 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
842 AM EDT TUE JUN 12 2007

...ANOTHER ROUND OF SEVERE WEATHER FOR TODAY...

.UPDATE...
SEVERE THUNDERSTORM WATCH 384 IN EFFECT FOR MUCH OF THE FORECAST
AREA THROUGH 40 PM EDT. LARGE MESOSCALE CONVECTIVE SYSTEM OVER
SOUTH-CENTRAL GEORGIA MOVING SOUTH. MAIN CELL IS NEAR VALDOSTA AND
LOOKS LIKE IT IS GRADUALLY WEAKENING AS IT MOVES SOUTHEAST. DEW
POINTS ARE IN THE MID 70S ACROSS THE AREA AND THE AIR MASS IS NICE
AND MOIST. ADD A BIT OF DAYTIME HEATING AND LAPSE RATES WILL BE
SET TO GO THIS AFTERNOON. SO FOR THE SHORT TERM THE AIR MASS OVER
SOUTHEAST GEORGIA HAS BEEN WORKED OVER BUT THREAT SHOULD END LATER
THIS MORNING AND EARLY THIS AFTERNOON WITH MAX DIURNAL HEATING.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  88  65  86  63 /  70  40  40  20
SSI  84  71  81  70 /  80  40  60  30
JAX  85  67  82  64 /  80  50  50  20
SGJ  84  69  78  67 /  90  50  60  30
GNV  88  67  83  65 /  70  40  40  20
OCF  87  68  86  64 /  60  40  40  20

&&

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

SANDRIK
Hazardous weather outlook, Jun 12, 8:30 AM EDT, 2 hours 57 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
830 AM EDT TUE JUN 12 2007

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-121700-
ALACHUA-APPLING-ATKINSON-BACON-BAKER-BRADFORD-BRANTLEY-
CAMDEN (COASTAL)-CAMDEN (INLAND)-CHARLTON-CLAY-CLINCH-COFFEE-
COLUMBIA-DUVAL-ECHOLS-FLAGLER-GILCHRIST-GLYNN (COASTAL)-
GLYNN (INLAND)-HAMILTON-JEFF DAVIS-MARION-NASSAU-PIERCE-PUTNAM-
ST JOHNS-SUWANNEE-UNION-WARE-WAYNE-
830 AM EDT TUE JUN 12 2007

THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA.

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

.HEADLINES...

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF NORTH FLORIDA
AND PORTIONS OF SOUTHEAST GEORGIA UNTIL 400 PM EDT...

A LARGE CONVECTIVE CLUSTER CONTINUES TO EXPAND IN AREAL COVERAGE
AHEAD OF UPPER SHORTWAVE TROUGH DIGGING SOUTHEASTWARD ACROSS GEORGIA
THIS MORNING. AS THE BOUNDARY LAYER WARMS AND INSTABILITY
INCREASES...THUNDERSTORMS SHOULD INCREASE IN INTENSITY AS THEY
SPREAD AND DEVELOP SOUTHEASTWARD ACROSS THE NORTHERN
FLORIDA PENINSULA.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...
AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

AFTERNOON AND EVENING THUNDERSTORM ACTIVITY SHOULD RETURN TO THE
REGION THROUGH LATE WEEK. OTHERWISE...NO SEVERE WEATHER IS
ANTICIPATED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ACTIVATION IS REQUESTED AT THIS TIME.

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

SANDRIK

SANDRIK

In the hours before

Special weather statement, Jun 12, 10:32 AM EDT, 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1032 AM EDT TUE JUN 12 2007

FLZ031-121500-
BRADFORD-
1032 AM EDT TUE JUN 12 2007

...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR BRADFORD COUNTY
FOR STRONG WINDS...SMALL HAIL AND EXCESSIVE LIGHTNING VALID UNTIL
1100 AM EDT...

AT 1032 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 6 MILES WEST OF LAWTEY...OR 4 MILES EAST
OF RAIFORD...MOVING SOUTHEAST AT 30 MPH. THIS STRONG THUNDERSTORM
WILL ALSO AFFECT AREAS AROUND LAWTEY AND STARKE THROUGH 1100 AM 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 ALONG WITH
POSSIBLE MINOR DAMAGE. HEAVY RAINFALL WILL PRODUCE PONDING OF WATER
ON ROADWAYS AND MINOR FLOODING OF LOW-LYING AREAS.

THE AREA REMAINS UNDER A SEVERE THUNDERSTORM WATCH.

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

ZAPPE
Special weather statement, Jun 12, 11:08 AM EDT, 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1108 AM EDT TUE JUN 12 2007

FLZ037-121600-
PUTNAM-
1108 AM EDT TUE JUN 12 2007

...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR EASTERN PUTNAM
COUNTY FOR STRONG WINDS...SMALL HAIL AND EXCESSIVE LIGHTNING VALID
UNTIL NOON EDT...

AT 1108 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED OVER BOSTWICK...OR 8 MILES NORTH OF
PALATKA...MOVING SOUTHEAST AT 30 MPH. THIS STRONG THUNDERSTORM WILL
ALSO AFFECT AREAS AROUND PALATKA...ORANGE MILLS...BOSTWICK...EAST
PALATKA...SATSUMA...SAN MATEO...POMONA PARK...LAKE COMO AND CRESCENT
CITY THROUGH NOON 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 ALONG WITH POSSIBLE MINOR DAMAGE. HEAVY RAINFALL WILL
PRODUCE PONDING OF WATER ON ROADWAYS AND MINOR FLOODING OF LOW-LYING
AREAS.

THE AREA REMAINS UNDER A SEVERE THUNDERSTORM WATCH.

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

ZAPPE
Special weather statement, Jun 12, 11:16 AM EDT, 11 minutes before
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Local storm report, Jun 12, 11:18 AM EDT, 9 minutes before
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Local storm report, Jun 12, 11:21 AM EDT, 6 minutes before
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Special weather statement, Jun 12, 11:24 AM EDT, 3 minutes before
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 1:54 AM EDTSpecial Marine WarningJAX2 hr
Jun 12, 3:07 AM EDTSpecial Marine WarningJAX53 min
Jun 12, 4:01 AM EDTSpecial Marine WarningJAX89 min
Jun 12, 5:28 AM EDTSpecial Marine WarningJAX92 min
Jun 12, 7:12 AM EDTSpecial Marine WarningJAX2 hr
Jun 12, 8:03 AM EDTSpecial Marine WarningJAX117 min
Jun 12, 8:37 AM EDTSpecial Marine WarningJAX113 min
Jun 12, 9:45 AM EDTSevere Thunderstorm WarningJAXBaker, Columbia45 min
Jun 12, 10:23 AM EDTSpecial Marine WarningJAX2 hr
Jun 12, 10:36 AM EDTSevere Thunderstorm WarningJAXClay, Saint Johns54 min
Jun 12, 10:41 AM EDTSevere Thunderstorm WarningJAXDuval23 min
Jun 12, 10:43 AM EDTSevere Thunderstorm WarningJAXBradford47 min
Jun 12, 11:09 AM EDTTornado WarningJAXSaint Johns40 min
Jun 12, 12:23 PM EDTSevere Thunderstorm WarningJAXMarion67 min
Jun 12, 8:16 AM EDTSevere Thunderstorm WarningJAXClinch, Echols59 min
Jun 12, 9:17 AM EDTSevere Thunderstorm WarningJAXClinch, Echols, Ware43 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.