Alert archive / Florida / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 305, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Aug 26, 2015, 5:03 PM EDT for Nassau County, Florida; Camden County, Georgia. It was in force for 27 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 26, 2015, 5:03 PM EDT (21:03 UTC)
- Expired
- Aug 26, 2015, 5:30 PM EDT
- In force
- 27 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
Counties Nassau County, FL, Camden County, GA
The radar
The Jacksonville radar (KJAX), 31 km from the middle of the area, began a volume at 21:04 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, 9.1 hours before the alert went out and 281 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
- 751 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 1157 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 7 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 26, 2:55 PM EDT, 2 hours 8 minutes earlier.
Area forecast discussion, Aug 26, 2:55 PM EDT, 2 hours 8 minutes before
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</html>Hazardous weather outlook, Aug 26, 4:10 AM EDT, 12 hours 53 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 410 AM EDT WED AUG 26 2015 AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125- GAZ132>136-149>154-162>166-271100- COASTAL WATERS FROM ALTAMAHA SOUND TO FERNANDINA BEACH FL OUT 20 NM-COASTAL WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL OUT 20 NM-COASTAL WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL OUT 20 NM-WATERS FROM ALTAMAHA SOUND GA TO FERNANDINA BEACH FL FROM 20 TO 60 NM-WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL FROM 20 TO 60 NM-WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL FROM 20 TO 60 NM-HAMILTON-SUWANNEE-COLUMBIA- BAKER-INLAND NASSAU-INLAND DUVAL-UNION-BRADFORD-CLAY-ST. JOHNS- GILCHRIST-ALACHUA-PUTNAM-FLAGLER-MARION-COASTAL NASSAU-COASTAL DUVAL- COFFEE-JEFF DAVIS-BACON-APPLING-WAYNE-ATKINSON-WARE-PIERCE-BRANTLEY- INLAND GLYNN-COASTAL GLYNN-ECHOLS-CLINCH-CHARLTON-INLAND CAMDEN- COASTAL CAMDEN- 410 AM EDT WED AUG 26 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST FLORIDA... SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT... ISOLATED TO SCATTERED AFTERNOON AND EVENING THUNDERSTORMS ARE EXPECTED ACROSS COASTAL SOUTHEAST GEORGIA AND NORTHEAST FLORIDA. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... SCATTERED TO NUMEROUS AFTERNOON AND EVENING THUNDERSTORMS ARE POSSIBLE EACH DAY ACROSS NORTHEAST FLORIDA AND SOUTHEAST GEORGIA. LOCALLY HEAVY RAINFALL WILL BE POSSIBLE WITH THESE STORMS. THE FORECAST TRACK AND STRENGTH OF TROPICAL STORM ERIKA IS STILL UNCERTAIN INTO EARLY NEXT WEEK. SWELLS ARE EXPECTED TO INCREASE IN THE COASTAL WATERS INCREASING THE RIP CURRENT RISK LATE THIS WEEKEND INTO NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX.
In the hours before
Special weather statement, Aug 26, 3:18 PM EDT, 1 hour 45 minutes before
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SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 426 PM EDT WED AUG 26 2015 FLZ025-125-262115- COASTAL DUVAL FL-INLAND DUVAL FL- 426 PM EDT WED AUG 26 2015 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL DUVAL COUNTY UNTIL 515 PM EDT... AT 426 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER JACKSONVILLE...MOVING NORTHEAST AT 10 MPH. 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. LOCATIONS IMPACTED INCLUDE... JACKSONVILLE...ARLINGTON...ORTEGA...FORT CAROLINE...RIVERSIDE...SAN MARCO AND TALLYRAND. PRECAUTIONARY/PREPAREDNESS ACTIONS... REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT. LAT...LON 3022 8174 3027 8178 3048 8154 3037 8147 TIME...MOT...LOC 2026Z 240DEG 7KT 3033 8165 PETERSON
Local storm report, Aug 26, 4:40 PM EDT, 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
440 PM EDT WED AUG 26 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0423 PM TSTM WND GST ST. AUGUSTINE 29.89N 81.31W
08/26/2015 M44 MPH ST. JOHNS FL ASOS
&&
AWALKERSpecial weather statement, Aug 26, 4:54 PM EDT, 9 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
454 PM EDT WED AUG 26 2015
FLZ124-GAZ166-262145-
COASTAL NASSAU FL-COASTAL CAMDEN GA-
454 PM EDT WED AUG 26 2015
...SIGNIFICANT WEATHER ADVISORY FOR UNTIL 545 PM EDT...
AT 454 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
KINGS BAY BASE...MOVING EAST AT 5 MPH.
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.
LOCATIONS IMPACTED INCLUDE...
FERNANDINA BEACH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.
LAT...LON 3069 8146 3072 8147 3070 8149 3069 8147
3068 8150 3072 8149 3073 8147 3074 8150
3079 8150 3076 8149 3076 8148 3080 8148
3081 8145 3075 8146 3070 8143
TIME...MOT...LOC 2054Z 252DEG 6KT 3075 8146
PETERSONSpecial weather statement, Aug 26, 4:59 PM EDT, 4 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 25, 9:16 PM EDT | Special Weather Statement | JAX | Nassau | 44 min |
| Aug 25, 9:55 PM EDT | Areal Flood Advisory | JAX | Duval, Nassau | 2 hr |
| Aug 25, 10:02 PM EDT | Special Weather Statement | JAX | Duval | 43 min |
| Aug 25, 10:14 PM EDT | Special Marine Warning | JAX | 91 min | |
| Aug 25, 10:54 PM EDT | Special Weather Statement | JAX | Clay | 51 min |
| Aug 25, 11:01 PM EDT | Special Marine Warning | JAX | 59 min | |
| Aug 26, 12:08 AM EDT | Special Marine Warning | JAX | 67 min | |
| Aug 26, 3:18 PM EDT | Special Weather Statement | JAX | Saint Johns | 42 min |
| Aug 26, 4:26 PM EDT | Special Weather Statement | JAX | Duval | 49 min |
| Aug 26, 4:59 PM EDT | Special Weather Statement | JAX | Nassau | 46 min |
| Aug 26, 5:08 PM EDT | Special Marine Warning | JAX | 112 min | |
| Aug 26, 5:18 PM EDT | Special Weather Statement | JAX | Saint Johns | 42 min |
| Aug 26, 5:29 PM EDT | Severe Thunderstorm Warning | JAX | Nassau | 31 min |
| Aug 26, 5:35 PM EDT | Areal Flood Advisory | JAX | Nassau | 85 min |
| Aug 26, 5:41 PM EDT | Areal Flood Advisory | JAX | Duval, Saint Johns | 94 min |
| Aug 26, 6:01 PM EDT | Special Weather Statement | JAX | Saint Johns | 44 min |
| Aug 26, 6:04 PM EDT | Special Weather Statement | JAX | Flagler | 41 min |
| Aug 26, 6:21 PM EDT | Areal Flood Advisory | JAX | Saint Johns | 84 min |
| Aug 26, 6:41 PM EDT | Areal Flood Advisory | JAX | Saint Johns | 94 min |
| Aug 26, 6:48 PM EDT | Special Weather Statement | JAX | Saint Johns | 42 min |
| Aug 26, 6:52 PM EDT | Special Marine Warning | JAX | 113 min | |
| Aug 26, 6:57 PM EDT | Severe Thunderstorm Warning | JAX | Saint Johns | 33 min |
| Aug 26, 7:01 PM EDT | Special Weather Statement | JAX | Duval | 44 min |
| Aug 26, 7:43 PM EDT | Special Weather Statement | JAX | Bradford | 47 min |
| Aug 25, 10:58 PM EDT | Special Weather Statement | JAX | Charlton | 47 min |
| Aug 25, 11:09 PM EDT | Special Weather Statement | JAX | Camden | 36 min |
| Aug 25, 11:16 PM EDT | Areal Flood Advisory | JAX | Camden | 89 min |
| Aug 25, 11:35 PM EDT | Areal Flood Advisory | JAX | Charlton | 85 min |
| Aug 25, 11:49 PM EDT | Special Weather Statement | JAX | Camden | 26 min |
| Aug 25, 11:58 PM EDT | Areal Flood Warning | JAX | Camden | 2 hr |
| Aug 25, 11:59 PM EDT | Special Weather Statement | JAX | Camden | 31 min |
| Aug 26, 12:10 AM EDT | Special Weather Statement | JAX | Camden | 35 min |
| Aug 26, 3:24 PM EDT | Special Weather Statement | JAX | Camden | 51 min |
| Aug 26, 4:54 PM EDT | Special Weather Statement | JAX | Camden | 51 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2015Severe Thunderstorm Warnings in Georgia, 2015Every severe thunderstorm warning in 2015
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.