Alert archive / Georgia / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 254, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Aug 7, 2015, 1:50 PM EDT for Baker County, Columbia County, Nassau County, Florida; 5 counties in Georgia. 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
- Aug 7, 2015, 1:50 PM EDT (17:50 UTC)
- Expired
- Aug 7, 2015, 2:30 PM EDT
- In force
- 40 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
Counties Baker County, FL, Columbia County, FL, Nassau County, FL, Camden County, GA, Charlton County, GA, Clinch County, GA, Echols County, GA, Ware County, GA
The radar
The Jacksonville radar (KJAX), 63 km from the middle of the area, began a volume at 17:52 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, 5.8 hours before the alert went out and 62 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
- 1489 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 739 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
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 7, 8:28 AM EDT, 5 hours 22 minutes earlier.
Area forecast discussion, Aug 7, 8:28 AM EDT, 5 hours 22 minutes before
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</html>Hazardous weather outlook, Aug 7, 10:40 AM EDT, 3 hours 10 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 1040 AM EDT FRI AUG 7 2015 AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125- GAZ132>136-149>154-162>166-081000- 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-1040 AM EDT FRI AUG 7 2015 ...SLIGHT RISK OF SEVERE STORMS TODAY... ...SMALL CRAFT ADVISORY IN EFFECT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST FLORIDA... SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT... SCATTERED TO NUMEROUS STORMS WILL SHIFT SOUTHEAST ACROSS THE AREA TODAY. STRONG STORMS WILL BE POSSIBLE...WITH A SLIGHT RISK OF SEVERE STORMS THIS AFTERNOON. GUSTY TO LOCALLY DAMAGING WINDS WILL BE THE MAIN THREAT. A SMALL CRAFT ADVISORY FOR WINDS IS IN EFFECT FOR THE OFFSHORE WATERS DUE TO SOUTHWEST TO WEST WINDS OF 20 TO 25 KNOTS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY... ISOLATED TO SCATTERED STORMS WILL BE POSSIBLE SATURDAY THROUGH TUESDAY. AN INCREASE TO NUMEROUS THUNDERSTORM ACTIVITY IS EXPECTED ON WEDNESDAY AND THURSDAY. .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 7, 1:27 PM EDT, 23 minutes before
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</html>Special weather statement, Aug 7, 1:34 PM EDT, 16 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 7, 3:42 AM EDT | Small Craft Advisory for Winds | JAX | 26 hr | |
| Aug 7, 1:27 PM EDT | Special Weather Statement | JAX | Hamilton | 33 min |
| Aug 7, 1:34 PM EDT | Special Weather Statement | JAX | Nassau | 26 min |
| Aug 7, 1:36 PM EDT | Special Marine Warning | JAX | 54 min | |
| Aug 7, 1:57 PM EDT | Special Weather Statement | JAX | Bradford, Clay, Union | 33 min |
| Aug 7, 2:11 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Duval, Nassau | 49 min |
| Aug 7, 2:14 PM EDT | Special Marine Warning | JAX | 2 hr | |
| Aug 7, 2:21 PM EDT | Special Weather Statement | JAX | Alachua, Bradford, Clay, Saint Johns, Union | 39 min |
| Aug 7, 2:31 PM EDT | Special Weather Statement | JAX | Baker, Columbia | 44 min |
| Aug 7, 2:39 PM EDT | Special Marine Warning | JAX | 2 hr | |
| Aug 7, 2:45 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Columbia, Duval, Nassau | 30 min |
| Aug 7, 2:49 PM EDT | Special Marine Warning | JAX | 41 min | |
| Aug 7, 2:54 PM EDT | Special Weather Statement | JAX | Alachua, Putnam | 51 min |
| Aug 7, 2:56 PM EDT | Severe Thunderstorm Warning | JAX | Clay, Putnam, Saint Johns | 34 min |
| Aug 7, 3:14 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Bradford, Clay, Columbia, Duval, Nassau and 2 more | 31 min |
| Aug 7, 3:20 PM EDT | Special Weather Statement | JAX | Columbia, Hamilton, Suwannee | 40 min |
| Aug 7, 3:24 PM EDT | Severe Thunderstorm Warning | JAX | Saint Johns | 36 min |
| Aug 7, 3:39 PM EDT | Severe Thunderstorm Warning | JAX | Hamilton | 66 min |
| Aug 7, 3:41 PM EDT | Special Weather Statement | JAX | Clay | 49 min |
| Aug 7, 3:43 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Columbia, Union | 21 min |
| Aug 7, 3:47 PM EDT | Special Weather Statement | JAX | Marion, Putnam | 43 min |
| Aug 7, 4:02 PM EDT | Special Weather Statement | JAX | Columbia, Suwannee, Union | 43 min |
| Aug 7, 4:11 PM EDT | Severe Thunderstorm Warning | JAX | Suwannee | 34 min |
| Aug 7, 4:15 PM EDT | Special Weather Statement | JAX | Baker, Union | 45 min |
| Aug 7, 4:18 PM EDT | Special Marine Warning | JAX | 117 min | |
| Aug 7, 4:18 PM EDT | Special Weather Statement | JAX | Hamilton | 42 min |
| Aug 7, 4:32 PM EDT | Special Weather Statement | JAX | Saint Johns | 28 min |
| Aug 7, 4:33 PM EDT | Severe Thunderstorm Warning | JAX | Columbia, Hamilton, Suwannee | 57 min |
| Aug 7, 4:50 PM EDT | Severe Thunderstorm Warning | JAX | Suwannee | 25 min |
| Aug 7, 4:52 PM EDT | Special Weather Statement | JAX | Baker | 53 min |
| Aug 7, 4:54 PM EDT | Special Marine Warning | JAX | 2 hr | |
| Aug 7, 5:04 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Bradford, Columbia, Union | 56 min |
| Aug 7, 5:21 PM EDT | Severe Thunderstorm Warning | JAX | Suwannee | 24 min |
| Aug 7, 5:23 PM EDT | Areal Flood Advisory | JAX | Suwannee | 97 min |
| Aug 7, 5:31 PM EDT | Special Weather Statement | JAX | Bradford, Clay | 59 min |
| Aug 7, 5:39 PM EDT | Severe Thunderstorm Warning | JAX | Alachua, Baker, Bradford, Clay, Putnam, Union | 66 min |
| Aug 7, 5:41 PM EDT | Severe Thunderstorm Warning | JAX | Columbia, Gilchrist, Suwannee, Union | 64 min |
| Aug 7, 5:42 PM EDT | Areal Flood Warning | JAX | Suwannee | 2 hr |
| Aug 7, 6:08 PM EDT | Severe Thunderstorm Warning | JAX | Alachua, Columbia, Gilchrist, Suwannee, Union | 67 min |
| Aug 7, 6:27 PM EDT | Special Weather Statement | JAX | Alachua, Marion, Putnam | 63 min |
| Aug 7, 7:12 PM EDT | Special Weather Statement | JAX | Suwannee | 63 min |
| Aug 7, 7:29 PM EDT | Special Weather Statement | JAX | Hamilton | 46 min |
| Aug 7, 7:32 PM EDT | Special Weather Statement | JAX | Marion | 58 min |
| Aug 7, 7:45 PM EDT | Areal Flood Advisory | JAX | Suwannee | 90 min |
| Aug 7, 7:47 PM EDT | Severe Thunderstorm Warning | JAX | Columbia, Hamilton, Suwannee, Union | 28 min |
| Aug 7, 2:38 PM EDT | Special Weather Statement | JAX | Camden | 52 min |
| Aug 7, 2:53 PM EDT | Special Weather Statement | JAX | Charlton, Ware | 52 min |
| Aug 7, 3:31 PM EDT | Special Weather Statement | JAX | Echols | 44 min |
| Aug 7, 5:44 PM EDT | Special Weather Statement | JAX | Brantley | 46 min |
Nearby
Severe Thunderstorm Warnings in Georgia, 2015Severe Thunderstorm Warnings in Florida, 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.