Alert archive / Florida / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 359, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Aug 25, 2008, 3:38 PM EDT for Saint Johns County, Florida. It was in force for 52 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, 2008, 3:38 PM EDT (19:38 UTC)
- Expired
- Aug 25, 2008, 4:30 PM EDT
- In force
- 52 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
County Saint Johns County, FL
The radar
The Jacksonville radar (KJAX), 70 km from the middle of the area, began a volume at 19:41 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
Tampa Bay, FL (KTBW), launched 12:00Z, 7.6 hours before the alert went out and 264 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
- 1263 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 855 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- -12 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 Aug 25, 1:53 PM EDT, 1 hour 45 minutes earlier.
Area forecast discussion, Aug 25, 1:53 PM EDT, 1 hour 45 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 153 PM EDT MON AUG 25 2008 .SHORT TERM...CONVECTION IS STARTING TO POP ACROSS THE JAX CWA THIS HOUR AS TEMPS RISE TO CONVECTIVE TEMP VALUES IN THE UPPER 80S. WIDESPREAD ACTIVITY ACROSS THE SUWANNEE RIVER VALLEY WILL TRACK NNE THROUGH THE REMAINDER OF THE AFTN AND MERGE WITH THE EAST COAST SEA BREEZE FRONT WHICH SHOULD MAKE IT INLAND TO ALONG OR JUST W OF THE I-95 CORRIDOR. FREQ LIGHTNING AND PERIODS OF HEAVY RAINFALL WITH CONTINUE TO BE THE PRIMARY CONCERNS TODAY. MEAN LAYER HIGH PRESSURE WILL RETROGRADE FROM THE WESTERN ATLANTIC TOWARD THE GOMEX THROUGH WED. A PREVAILING SW STEERING FLOW WILL FOCUS THE HIGHEST CHANCES OF AFTN TSRA TOWARD EASTERN SECTIONS OF OUR CWA. TONIGHT EXPECT DRIER AIR WITH PWATS BELOW 2 INCHES OVER THE GOMEX TO MOVE ACROSS OUR AREA FOR TUE WHICH WILL TAKE AFTN POPS DOWN ACROSS OUR FL ZONES TO THE CHANCE CATEGORY...WHILE MAINTAINING LIKELY POPS ACROSS OUR GA ZONES WHERE MOISTURE WILL BE DEEPER AND DPVA STRONGER AS THE REMNANTS OF FAY SLOWLY TRACK NNE TOWARD THE MID ATLANTIC REGION. WED INTO THU A TRAILING PLUME OF MOISTURE ALONG A WAKE TROUGH FROM THE REMNANTS OF FAY WILL SAG ACROSS OUR GA ZONES WHICH...ALONG WITH THE SEA BREEZES...WILL ENHANCE AFTN CONVECTION. MAIN SHORT TERM CONCERNS WILL BE GUSTY WINDS TUE (DRIER AIR ALOFT) THEN RETURN TO FREQ LIGHTNING AND PERIODS OF HVY RA WED AND THU. .LONG TERM...LATEST OPERATIONAL MEX GUIDANCE CONTINUES TO ADVERTISE A RETURN TO NEAR CLIMO TEMPS AND DIURNALLY DRIVEN CONVECTION IN THE MID CHANCE RANGE OF 30-40%. && .AVIATION...SCT TO NUMEROUS SHOWERS AND STORMS WILL CONTINUE ACROSS THE REGION THRU THE EVENING...WITH IFR CONDITIONS LIKELY AT TIMES. WILL CONTINUE THE TEMPO FOR APPROX 3 HOURS BETWEEN 18Z AND 23Z AT ALL SITES. SOME MVFR PATCHY FOG IS POSSIBLE TONIGHT DUE TO WET GROUND ESPECIALLY AT GNV. OTHER SITES DID NOT EXPERIENCE FOG LAST NIGHT AND WILL KEEP VFR CONDS FOR NOW. && .MARINE...WINDS WILL REMAIN GENERALLY SOUTHERLY THIS WEEK AS BERMUDA HIGH BUILDS OVER THE SOUTHWESTERN ATLANTIC. WIND SPEEDS WILL BE NEAR 10 KT AND SEAS WILL BE 2-4 FT. && .PRELIMINARY POINT TEMPS/POPS... AMG 71 89 71 88 / 30 60 50 60 SSI 75 86 74 86 / 30 40 30 40 JAX 73 89 73 89 / 30 50 30 40 SGJ 74 88 74 87 / 30 40 30 30 GNV 73 90 73 89 / 20 50 30 40 OCF 72 90 72 90 / 20 40 30 40 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...NONE. GA...NONE. AM...NONE. && ENYEDI/TRABERT/KEEGAN
Hazardous weather outlook, Aug 25, 5:10 AM EDT, 10 hours 28 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 510 AM EDT MON AUG 25 2008 FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-261000- 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- 510 AM EDT MON AUG 25 2008 THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA. .DAY ONE...TODAY AND TONIGHT... ...RIVER FLOOD WARNINGS IN EFFECT FOR PORTIONS OF NORTHEAST FLORIDA... ...MODERATE RISK OF RIP CURRENTS... RIVER FLOOD WARNINGS ARE IN EFFECT FOR THE SAINT MARYS RIVER...THE SANTA FE RIVER AND BLACK CREEK IN NORTHEAST FLORIDA. REFER TO LOCAL FLOOD WARNING PRODUCTS FOR DETAILS. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED AGAIN TODAY. LOCALLY HEAVY RAINFALL WILL BE POSSIBLE AND EXCESSIVE RUNOFF MAY CAUSE TEMPORARY FLOODING OF LOW-LYING AND POOR DRAINAGE AREAS. GUSTY WINDS OVER 40 MPH AND FREQUENT LIGHTNING CAN BE EXPECTED WITH THE STRONGEST STORMS. A MODERATE RISK OF RIP CURRENTS IS EXPECTED DUE TO CONTINUED EASTERLY SWELLS AND PREVIOUS RIP CURRENT CHANNELS THAT DEVELOPED DUE TO ROUGH SURF FROM FAY. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY... SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE MUCH OF THIS WEEK DUE TO A LINGERING TROPICAL AIRMASS. LOCALLY HEAVY RAINFALL WILL BE POSSIBLE ALONG WITH GUSTY WINDS IN STRONG THUNDERSTORMS MAINLY DURING THE AFTERNOON AND EVENING HOURS. RAIN CHANCES MAY DECREASE BY LATE IN THE WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ARE REQUESTED TO SELF-ACTIVATE IN THE EVENT OF WARNINGS BEING ISSUED OR OCCURRENCE OF ADDITIONAL FLOODING. FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX. CARROLL
In the hours before
Local storm report, Aug 25, 10:43 AM EDT, 4 hours 55 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1043 AM EDT MON AUG 25 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM TROPICAL STORM 6 ENE ARLINGTON 30.37N 81.51W
08/23/2008 DUVAL FL NWS EMPLOYEE
THE TOP PORTION OF A LARGE OAK TREE BROKE OFF AND PUNCHED
A HOLE THROUGH THE ROOF OF A HOUSE IN THE HIDDEN HILLS
SUBDIVISION IN JACKSONVILLE.
&&
MTRABERTSpecial weather statement, Aug 25, 2:25 PM EDT, 1 hour 13 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 225 PM EDT MON AUG 25 2008 GAZ132-251915- COFFEE- 225 PM EDT MON AUG 25 2008 ...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR NORTHWESTERN COFFEE COUNTY FOR EXCESSIVE LIGHTNING VALID UNTIL 315 PM EDT... AT 225 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED 4 MILES NORTHEAST OF AMBROSE...MOVING NORTH AT 15 MPH. THIS STRONG THUNDERSTORM WILL ALSO AFFECT AREAS AROUND BROXTON...AMBROSE AND PRIDGEN THROUGH 315 PM EDT. EXCESSIVE CLOUD-TO-GROUND LIGHTNING CAN BE EXPECTED. POSTPONE OUTDOOR ACTIVITIES PROMPTLY. GO QUICKLY INSIDE A COMPLETELY ENCLOSED BUILDING. UNPLUG ELECTRONIC DEVICES AND APPLIANCES AS THEY ARE SUSCEPTIBLE TO POWER SURGES AND MAY BE DAMAGED BY NEARBY LIGHTNING STRIKES. REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT. ENYEDI
Special weather statement, Aug 25, 2:51 PM EDT, 47 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 251 PM EDT MON AUG 25 2008 FLZ033-038-251915- FLAGLER-ST. JOHNS- 251 PM EDT MON AUG 25 2008 ...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR EASTERN FLAGLER AND SOUTHEASTERN ST. JOHNS COUNTIES FOR EXCESSIVE LIGHTNING VALID UNTIL 315 PM EDT... AT 251 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS CENTERED ALONG A LINE EXTENDING FROM 5 MILES WEST OF PALM COAST TO 13 MILES SOUTH OF FLAGLER BEACH...MOVING NORTHEAST AT 19 MPH. THESE STRONG THUNDERSTORMS WILL ALSO AFFECT AREAS AROUND ESPANOLA...BUNNELL...PALM COAST...FLAGLER BEACH AND CRESCENT BEACH THROUGH 315 PM EDT. EXCESSIVE CLOUD-TO-GROUND LIGHTNING CAN BE EXPECTED. POSTPONE OUTDOOR ACTIVITIES PROMPTLY. GO QUICKLY INSIDE A COMPLETELY ENCLOSED BUILDING. UNPLUG ELECTRONIC DEVICES AND APPLIANCES AS THEY ARE SUSCEPTIBLE TO POWER SURGES AND MAY BE DAMAGED BY NEARBY LIGHTNING STRIKES. HEAVY RAINFALL WILL PRODUCE PONDING OF WATER ON ROADWAYS AND MINOR FLOODING OF LOW-LYING AREAS. REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT. TRABERT
Special weather statement, Aug 25, 3:31 PM EDT, 7 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 |
|---|---|---|---|---|
| Aug 24, 9:48 PM EDT | Areal Flood Warning | JAX | Putnam | 12 hr |
| Aug 25, 3:06 PM EDT | Special Marine Warning | JAX | 114 min | |
| Aug 25, 3:30 PM EDT | River Flood Warning | JAX | Alachua, Bradford, Columbia, Gilchrist, Suwannee, Union | 9 days |
| Aug 25, 3:31 PM EDT | Areal Flood Advisory | JAX | Flagler, Saint Johns | 119 min |
| Aug 25, 3:32 PM EDT | Special Marine Warning | JAX | 118 min | |
| Aug 25, 3:49 PM EDT | Areal Flood Advisory | JAX | Duval | 116 min |
| Aug 25, 4:30 PM EDT | Special Marine Warning | JAX | 90 min | |
| Aug 25, 4:38 PM EDT | Areal Flood Advisory | JAX | Duval | 112 min |
| Aug 25, 5:02 PM EDT | Areal Flood Advisory | JAX | Duval, Nassau | 118 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.