Alert archive / Florida / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 86, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 12, 2007, 12:23 PM EDT for Marion County, Florida. It was in force for 67 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, 12:23 PM EDT (16:23 UTC)
- Expired
- Jun 12, 2007, 1:30 PM EDT
- In force
- 67 min
- Issued by
- NWS Jacksonville, FL
- Area
- Counties, with a storm outline in the text
County Marion County, FL
The radar
The Jacksonville radar (KJAX), 146 km from the middle of the area, began a volume at 16:26 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 12, 8:25 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 4.4 hours before the alert went out and 148 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
- 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
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, 3 hours 41 minutes earlier.
Area forecast discussion, Jun 12, 8:42 AM EDT, 3 hours 41 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, 3 hours 53 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
Local storm report, Jun 12, 11:45 AM EDT, 38 minutes before
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</html>Special weather statement, Jun 12, 11:46 AM EDT, 37 minutes before
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</html>Local storm report, Jun 12, 12:13 PM EDT, 10 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 |
|---|---|---|---|---|
| Jun 12, 1:54 AM EDT | Special Marine Warning | JAX | 2 hr | |
| Jun 12, 3:07 AM EDT | Special Marine Warning | JAX | 53 min | |
| Jun 12, 4:01 AM EDT | Special Marine Warning | JAX | 89 min | |
| Jun 12, 5:28 AM EDT | Special Marine Warning | JAX | 92 min | |
| Jun 12, 7:12 AM EDT | Special Marine Warning | JAX | 2 hr | |
| Jun 12, 8:03 AM EDT | Special Marine Warning | JAX | 117 min | |
| Jun 12, 8:37 AM EDT | Special Marine Warning | JAX | 113 min | |
| Jun 12, 9:45 AM EDT | Severe Thunderstorm Warning | JAX | Baker, Columbia | 45 min |
| Jun 12, 10:23 AM EDT | Special Marine Warning | JAX | 2 hr | |
| Jun 12, 10:36 AM EDT | Severe Thunderstorm Warning | JAX | Clay, Saint Johns | 54 min |
| Jun 12, 10:41 AM EDT | Severe Thunderstorm Warning | JAX | Duval | 23 min |
| Jun 12, 10:43 AM EDT | Severe Thunderstorm Warning | JAX | Bradford | 47 min |
| Jun 12, 11:09 AM EDT | Tornado Warning | JAX | Saint Johns | 40 min |
| Jun 12, 11:27 AM EDT | Severe Thunderstorm Warning | JAX | Flagler | 63 min |
| Jun 12, 8:16 AM EDT | Severe Thunderstorm Warning | JAX | Clinch, Echols | 59 min |
| Jun 12, 9:17 AM EDT | Severe Thunderstorm Warning | JAX | Clinch, Echols, Ware | 43 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.