Alert archive / Florida / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 221, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 18, 2008, 4:20 PM EDT for Duval County, Saint Johns County, Florida. It was in force for 40 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 18, 2008, 4:20 PM EDT (20:20 UTC)
- Expired
- Jun 18, 2008, 5:00 PM EDT
- In force
- 40 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
Counties Duval County, FL, Saint Johns County, FL
The radar
The Jacksonville radar (KJAX), 43 km from the middle of the area, began a volume at 20:22 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
Jacksonville, FL (KJAX), launched 12:00Z, 8.3 hours before the alert went out and 45 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
- 855 J/kg
- Mixed-layer CIN
- -95 J/kg
- Mixed-layer LCL
- 1165 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 18, 2:10 PM EDT, 2 hours 10 minutes earlier.
Area forecast discussion, Jun 18, 2:10 PM EDT, 2 hours 10 minutes before
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</html>Hazardous weather outlook, Jun 18, 4:15 AM EDT, 12 hours 5 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 415 AM EDT WED JUN 18 2008 FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-191000- 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- 415 AM EDT WED JUN 18 2008 THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA. .DAY ONE...TODAY AND TONIGHT... ...ISOLATED SEVERE STORMS POSSIBLE THIS AFTERNOON ACROSS NORTHEAST FLORIDA... AN APPROACHING COLD FRONT AND UPPER DISTURBANCE WILL PRODUCE SCATTERED THUNDERSTORMS ACROSS NORTHEAST FLORIDA THIS AFTERNOON. MOST OF THE STORMS ARE EXPECTED TO BE SOUTH OF INTERSTATE 10 AND ALONG THE COAST JUST SOUTH OF JACKSONVILLE. SOME OF THE STORMS MAY PRODUCE STRONG AND POSSIBLY DAMAGING WINDS AS WELL AS HAIL. FREQUENT DANGEROUS CLOUD TO GROUND LIGHTNING WILL BE ANOTHER CONCERN. THE STORMS MAY LINGER INTO A PART OF THE EVENING BUT ARE EXPECTED TO COME TO AN END AS THE FRONT PUSHES THROUGH. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... ANOTHER FRONT WILL APPROACH THE AREA BY THE WEEKEND WITH INCREASING CHANCES OF SHOWERS AND STORMS. SOME STORMS MAY BE STRONG WITH FREQUENT LIGHTNING...STRONG WINDS...AND HAIL THE MAIN CONCERNS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT REQUESTED AT THIS TIME. 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, Jun 18, 3:45 PM EDT, 35 minutes before
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</html>Local storm report, Jun 18, 3:47 PM EDT, 33 minutes before
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</html>Special weather statement, Jun 18, 3:54 PM EDT, 26 minutes before
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</html>Local storm report, Jun 18, 3:57 PM EDT, 23 minutes before
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</html>Special weather statement, Jun 18, 3:58 PM EDT, 22 minutes before
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</html>Local storm report, Jun 18, 4:05 PM EDT, 15 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 18, 12:27 AM EDT | Special Marine Warning | JAX | 63 min | |
| Jun 18, 4:28 AM EDT | Fire Weather Watch | JAX | Baker, Suwannee, Union | 25 hr |
| Jun 18, 10:13 AM EDT | Areal Flood Advisory | JAX | Marion | 2 hr |
| Jun 18, 12:46 PM EDT | Areal Flood Advisory | JAX | Marion, Putnam | 119 min |
| Jun 18, 1:10 PM EDT | Severe Thunderstorm Warning | JAX | Flagler, Putnam, Saint Johns | 65 min |
| Jun 18, 1:11 PM EDT | Special Marine Warning | JAX | 2 hr | |
| Jun 18, 1:50 PM EDT | Severe Thunderstorm Warning | JAX | Marion | 39 min |
| Jun 18, 2:07 PM EDT | Red Flag Warning | JAX | Baker, Suwannee, Union | 29 hr |
| Jun 18, 2:27 PM EDT | Special Marine Warning | JAX | 72 min | |
| Jun 18, 3:18 PM EDT | Special Marine Warning | JAX | 50 min | |
| Jun 18, 3:20 PM EDT | Severe Thunderstorm Warning | JAX | Columbia, Suwannee | 55 min |
| Jun 18, 3:34 PM EDT | Areal Flood Advisory | JAX | Baker, Columbia, Duval, Nassau, Suwannee | 116 min |
| Jun 18, 3:59 PM EDT | Special Marine Warning | JAX | 29 min | |
| Jun 18, 4:04 PM EDT | Severe Thunderstorm Warning | JAX | Duval | 20 min |
| Jun 18, 4:26 PM EDT | Special Marine Warning | JAX | 62 min | |
| Jun 18, 4:31 PM EDT | Areal Flood Advisory | JAX | Duval, Saint Johns | 119 min |
| Jun 18, 4:33 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Bradford, Clay, Union | 57 min |
| Jun 18, 4:42 PM EDT | Severe Thunderstorm Warning | JAX | Duval, Saint Johns | 38 min |
| Jun 18, 4:49 PM EDT | Special Marine Warning | JAX | 69 min | |
| Jun 18, 5:00 PM EDT | Severe Thunderstorm Warning | JAX | Saint Johns | 20 min |
| Jun 18, 5:11 PM EDT | Areal Flood Advisory | JAX | Clay, Saint Johns | 94 min |
| Jun 18, 5:18 PM EDT | Severe Thunderstorm Warning | JAX | Alachua, Bradford, Clay, Marion, Putnam, Saint Johns | 57 min |
| Jun 18, 5:40 PM EDT | Special Marine Warning | JAX | 17 min | |
| Jun 18, 5:56 PM EDT | Special Marine Warning | JAX | 64 min | |
| Jun 18, 6:52 PM EDT | Special Marine Warning | JAX | 113 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2008Every severe thunderstorm warning in 2008
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.