Alert archive / Florida / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 122, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 7, 2007, 6:38 PM EDT for Duval County, Florida. It was in force for 37 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 7, 2007, 6:38 PM EDT (22:38 UTC)
- Expired
- Jul 7, 2007, 7:15 PM EDT
- In force
- 37 min
- Issued by
- NWS Jacksonville, FL
- Area
- Counties, with a storm outline in the text
County Duval County, FL
The radar
The Jacksonville radar (KJAX), 17 km from the middle of the area, began a volume at 22:41 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, 10.6 hours before the alert went out and 235 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.
- Mixed-layer CAPE
- 880 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 582 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- -5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jul 7, 3:50 PM EDT, 2 hours 48 minutes earlier.
Area forecast discussion, Jul 7, 3:50 PM EDT, 2 hours 48 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 545 AM EDT SAT JUL 7 2007 FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-080815- 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- 545 AM EDT SAT JUL 7 2007 THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA. .DAY ONE...TODAY AND TONIGHT... ...LOCALLY HEAVY RAIN EXPECTED TODAY... DUE TO HIGH MOISTURE ACROSS THE AREA AND UPPER LEVEL DISTURBANCES... SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED TODAY MAINLY DURING THE AFTERNOON AND EVENING HOURS. SOME OF THE THUNDERSTORMS WILL PRODUCE HEAVY RAINFALL...EXCESSIVE LIGHTNING...AND GUSTY WINDS TO AROUND 40 MPH. DUE TO SLOW MOTION OF STORMS TO THE EAST...HEAVY RAINFALL MAY PRODUCE MINOR FLOODING OF LOW-LYING AREAS. MOST LIGHTNING FATALITIES AND INJURIES OCCUR IN OPEN FIELDS OR UNDER TREES. IF OUTDOORS DURING THUNDERSTORM ACTIVITY...SEEK SHELTER IN A STURDY BUILDING OR CAR. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY... ISOLATED TO SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS ARE EXPECTED EACH DAY. THE STRONGEST THUNDERSTORMS WILL BE CAPABLE OF PRODUCING LOCALLY HEAVY RAINFALL...STRONG GUSTY WINDS...AND FREQUENT CLOUD TO GROUND LIGHTNING. WARMER DAYTIME TEMPERATURES ARE FORECAST AND WILL LIKELY RESULT IN HEAT INDICES OF AROUND 100 FROM SUNDAY THROUGH THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. HOWEVER... SPOTTERS ARE REQUESTED TO REPORT IF FLOODING IS OBSERVED. FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX. ARS
In the hours before
Special weather statement, Jul 7, 4:38 PM EDT, 2 hours before
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</html>Special weather statement, Jul 7, 4:43 PM EDT, 1 hour 55 minutes before
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</html>Special weather statement, Jul 7, 5:17 PM EDT, 1 hour 21 minutes before
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</html>Special weather statement, Jul 7, 6:26 PM EDT, 12 minutes before
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</html>The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 2:50 PM EDT | Special Marine Warning | JAX | 55 min | |
| Jul 7, 3:40 PM EDT | Severe Thunderstorm Warning | JAX | Flagler | 50 min |
| Jul 7, 3:42 PM EDT | Special Marine Warning | JAX | 93 min | |
| Jul 7, 4:25 PM EDT | Special Marine Warning | JAX | 65 min | |
| Jul 7, 5:32 PM EDT | Special Marine Warning | JAX | 88 min | |
| Jul 7, 6:36 PM EDT | Special Marine Warning | JAX | 84 min | |
| Jul 7, 7:03 PM EDT | Special Marine Warning | JAX | 87 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.