Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 68, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 25, 2021, 2:12 AM EDT for Duval County, Nassau County, Florida; Charlton County, Georgia. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 25, 2021, 2:12 AM EDT (06:12 UTC)
- Expired
- Apr 25, 2021, 2:48 AM EDT
- In force
- 36 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Duval County, FL, Nassau County, FL, Charlton County, GA
The radar
The Jacksonville radar (KJAX), 8 km from the middle of the area, began a volume at 06:13 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 00:00Z, 6.2 hours before the alert went out and 9 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
- 64 J/kg
- Mixed-layer CIN
- -157 J/kg
- Mixed-layer LCL
- 850 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 275 m²/s²
- 0-3 km storm-relative helicity
- 358 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
The text
As transmitted.
182
WUUS52 KJAX 250612
SVRJAX
FLC031-089-GAC049-250700-
/O.NEW.KJAX.SV.W.0068.210425T0612Z-210425T0700Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
212 AM EDT Sun Apr 25 2021
The National Weather Service in Jacksonville has issued a
* Severe Thunderstorm Warning for...
Central Nassau County in northeastern Florida...
Northern Duval County in northeastern Florida...
South central Charlton County in southeastern Georgia...
* Until 300 AM EDT.
* At 212 AM EDT, a severe thunderstorm was located near St. George,
or 16 miles southwest of Callahan, moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Fernandina Beach, Callahan, Jacksonville International Arpt, Yulee,
Cisco Gardens, Nassau Village-Ratliff, Ratliff, St. George,
Oceanway and Little Talbot Island.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3037 8176 3036 8215 3052 8215 3066 8140
3037 8136
TIME...MOT...LOC 0612Z 266DEG 42KT 3045 8208
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
ENYEDI3 follow-up statements
020
WWUS52 KJAX 250626
SVSJAX
Severe Weather Statement
National Weather Service Jacksonville FL
226 AM EDT Sun Apr 25 2021
GAC049-250636-
/O.CAN.KJAX.SV.W.0068.000000T0000Z-210425T0700Z/
Charlton GA-
226 AM EDT Sun Apr 25 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CHARLTON COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3036 8205 3037 8204 3044 8204 3047 8202
3055 8201 3066 8140 3037 8136
TIME...MOT...LOC 0626Z 266DEG 42KT 3046 8189
$$
FLC031-089-250700-
/O.CON.KJAX.SV.W.0068.000000T0000Z-210425T0700Z/
Nassau FL-Duval FL-
226 AM EDT Sun Apr 25 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 AM EDT
FOR CENTRAL NASSAU AND NORTHERN DUVAL COUNTIES...
At 226 AM EDT, a severe thunderstorm was located near Ratliff, or 7
miles southwest of Callahan, moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Fernandina Beach, Callahan, Jacksonville International Arpt, Yulee,
Cisco Gardens, Nassau Village-Ratliff, Ratliff, Oceanway, Little
Talbot Island and Fort Caroline.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3036 8205 3037 8204 3044 8204 3047 8202
3055 8201 3066 8140 3037 8136
TIME...MOT...LOC 0626Z 266DEG 42KT 3046 8189
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
ENYEDI183
WWUS52 KJAX 250643
SVSJAX
Severe Weather Statement
National Weather Service Jacksonville FL
243 AM EDT Sun Apr 25 2021
FLC031-089-250700-
/O.CON.KJAX.SV.W.0068.000000T0000Z-210425T0700Z/
Nassau FL-Duval FL-
243 AM EDT Sun Apr 25 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 AM EDT
FOR EAST CENTRAL NASSAU AND NORTHEASTERN DUVAL COUNTIES...
At 242 AM EDT, a severe thunderstorm was located over Jacksonville
International Arpt, moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Fernandina Beach, Jacksonville International Arpt, Cisco Gardens,
Oceanway, Little Talbot Island, Fort Caroline and Nassau
Village-Ratliff.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3037 8181 3052 8180 3066 8141 3037 8136
TIME...MOT...LOC 0642Z 266DEG 42KT 3047 8167
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
ENYEDI676
WWUS52 KJAX 250648
SVSJAX
Severe Weather Statement
National Weather Service Jacksonville FL
248 AM EDT Sun Apr 25 2021
FLC031-089-250658-
/O.CAN.KJAX.SV.W.0068.000000T0000Z-210425T0700Z/
Nassau FL-Duval FL-
248 AM EDT Sun Apr 25 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL NASSAU AND
NORTHEASTERN DUVAL COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However heavy rain is
still possible with this thunderstorm.
LAT...LON 3037 8181 3052 8180 3066 8141 3037 8136
TIME...MOT...LOC 0645Z 266DEG 42KT 3048 8158
$$
ENYEDIThe office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 11:32 PM EDT | Special Marine Warning | JAX | 118 min | |
| Apr 25, 12:26 AM EDT | Special Weather Statement | JAX | Nassau | 34 min |
| Apr 25, 12:41 AM EDT | Special Weather Statement | JAX | Hamilton | 49 min |
| Apr 25, 1:03 AM EDT | Special Weather Statement | JAX | Suwannee | 42 min |
| Apr 25, 1:15 AM EDT | Severe Thunderstorm Warning | JAX | Baker, Columbia, Hamilton | 23 min |
| Apr 25, 1:30 AM EDT | Special Marine Warning | JAX | 90 min | |
| Apr 25, 1:42 AM EDT | Special Weather Statement | JAX | Columbia, Suwannee | 48 min |
| Apr 25, 2:01 AM EDT | Special Weather Statement | JAX | Nassau | 44 min |
| Apr 25, 2:06 AM EDT | Severe Thunderstorm Warning | JAX | Baker, Columbia, Suwannee | 24 min |
| Apr 25, 2:23 AM EDT | Special Weather Statement | JAX | Baker, Columbia, Union | 52 min |
| Apr 25, 2:29 AM EDT | Special Marine Warning | JAX | 91 min | |
| Apr 25, 2:49 AM EDT | Special Weather Statement | JAX | Duval | 41 min |
| Apr 25, 2:52 AM EDT | Special Marine Warning | JAX | 38 min | |
| Apr 25, 2:55 AM EDT | Special Weather Statement | JAX | Bradford, Clay, Union | 50 min |
| Apr 25, 3:18 AM EDT | Special Weather Statement | JAX | Clay, Saint Johns | 42 min |
| Apr 25, 3:36 AM EDT | Special Marine Warning | JAX | 54 min | |
| Apr 25, 3:59 AM EDT | Special Weather Statement | JAX | Clay, Saint Johns | 46 min |
| Apr 25, 4:23 AM EDT | Special Marine Warning | JAX | 3 hr | |
| Apr 25, 4:28 AM EDT | Special Weather Statement | JAX | Putnam | 47 min |
| Apr 25, 5:10 AM EDT | Special Weather Statement | JAX | Saint Johns | 50 min |
| Apr 25, 6:20 AM EDT | Special Weather Statement | JAX | Flagler | 40 min |
| Apr 25, 7:01 AM EDT | Special Weather Statement | JAX | Flagler | 14 min |
| Apr 25, 7:13 AM EDT | Special Weather Statement | JAX | Marion | 47 min |
| Apr 25, 7:29 AM EDT | Special Marine Warning | JAX | 61 min | |
| Apr 25, 8:06 AM EDT | Special Weather Statement | JAX | Lake | 24 min |
| Apr 24, 8:13 PM EDT | Special Weather Statement | JAX | Wayne | 32 min |
| Apr 24, 8:18 PM EDT | Severe Thunderstorm Warning | JAX | Appling, Bacon, Coffee, Jeff Davis | 27 min |
| Apr 24, 8:41 PM EDT | Severe Thunderstorm Warning | JAX | Appling, Bacon, Coffee, Jeff Davis | 49 min |
| Apr 24, 8:45 PM EDT | Flash Flood Warning | JAX | Appling, Bacon, Coffee, Jeff Davis | 3 hr |
| Apr 24, 8:48 PM EDT | Severe Thunderstorm Warning | JAX | Atkinson, Coffee | 42 min |
| Apr 24, 8:51 PM EDT | Tornado Warning | JAX | Atkinson, Coffee | 39 min |
| Apr 24, 9:00 PM EDT | Special Weather Statement | JAX | Wayne | 45 min |
| Apr 24, 9:08 PM EDT | Severe Thunderstorm Warning | JAX | Appling, Bacon, Coffee, Pierce, Ware | 52 min |
| Apr 24, 9:16 PM EDT | Tornado Warning | JAX | Appling, Bacon, Coffee, Pierce, Ware | 29 min |
| Apr 24, 9:33 PM EDT | Special Weather Statement | JAX | Atkinson, Coffee | 42 min |
| Apr 24, 9:41 PM EDT | Tornado Warning | JAX | Bacon, Pierce, Ware | 34 min |
| Apr 24, 9:45 PM EDT | Special Weather Statement | JAX | Appling | 45 min |
| Apr 24, 9:50 PM EDT | Special Weather Statement | JAX | Clinch | 85 min |
| Apr 24, 9:58 PM EDT | Severe Thunderstorm Warning | JAX | Appling, Brantley, Glynn, Pierce, Wayne | 48 min |
| Apr 24, 10:11 PM EDT | Special Weather Statement | JAX | Bacon, Pierce | 34 min |
| Apr 24, 10:17 PM EDT | Severe Thunderstorm Warning | JAX | Clinch | 43 min |
| Apr 24, 10:23 PM EDT | Special Weather Statement | JAX | Atkinson | 52 min |
| Apr 24, 10:48 PM EDT | Special Weather Statement | JAX | Bacon, Brantley, Glynn, Pierce, Wayne | 42 min |
| Apr 24, 10:54 PM EDT | Special Weather Statement | JAX | Clinch | 66 min |
| Apr 24, 10:57 PM EDT | Severe Thunderstorm Warning | JAX | Brantley, Charlton, Clinch, Pierce, Ware | 48 min |
| Apr 24, 11:05 PM EDT | Severe Thunderstorm Warning | JAX | Charlton, Clinch, Echols, Ware | 55 min |
| Apr 24, 11:16 PM EDT | Special Weather Statement | JAX | Atkinson | 44 min |
| Apr 24, 11:27 PM EDT | Special Weather Statement | JAX | Brantley, Glynn | 63 min |
| Apr 24, 11:34 PM EDT | Special Weather Statement | JAX | Bacon, Pierce, Wayne | 56 min |
| Apr 24, 11:40 PM EDT | Severe Thunderstorm Warning | JAX | Brantley, Charlton, Clinch, Ware | 50 min |
| Apr 24, 11:46 PM EDT | Special Weather Statement | JAX | Camden, Charlton | 44 min |
| Apr 24, 11:57 PM EDT | Special Weather Statement | JAX | Brantley, Pierce | 63 min |
| Apr 25, 12:01 AM EDT | Severe Thunderstorm Warning | JAX | Brantley, Camden, Charlton, Glynn | 44 min |
| Apr 25, 12:07 AM EDT | Severe Thunderstorm Warning | JAX | Wayne | 23 min |
| Apr 25, 12:09 AM EDT | Special Weather Statement | JAX | Echols | 51 min |
| Apr 25, 12:33 AM EDT | Severe Thunderstorm Warning | JAX | Camden, Glynn | 27 min |
| Apr 25, 12:36 AM EDT | Severe Thunderstorm Warning | JAX | Clinch, Echols | 39 min |
| Apr 25, 12:52 AM EDT | Special Weather Statement | JAX | Camden, Glynn, Ware | 38 min |
| Apr 25, 12:58 AM EDT | Special Weather Statement | JAX | Charlton | 62 min |
| Apr 25, 1:24 AM EDT | Special Weather Statement | JAX | Camden, Glynn | 66 min |
| Apr 25, 1:38 AM EDT | Special Weather Statement | JAX | Charlton | 67 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2021Severe Thunderstorm Warnings in Georgia, 2021Every severe thunderstorm warning in 2021
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.