Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 4, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Jan 27, 2021, 3:12 PM EST for 4 counties in Florida. It was in force for 63 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
- Jan 27, 2021, 3:12 PM EST (20:12 UTC)
- Expired
- Jan 27, 2021, 4:15 PM EST
- In force
- 63 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Baker County, FL, Clay County, FL, Duval County, FL, Nassau County, FL
The radar
The Jacksonville radar (KJAX), 31 km from the middle of the area, began a volume at 20:12 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, 8.2 hours before the alert went out and 32 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
- 88 J/kg
- Mixed-layer CIN
- -101 J/kg
- Mixed-layer LCL
- 456 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 181 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
362
WUUS52 KJAX 272012
SVRJAX
FLC003-019-031-089-272115-
/O.NEW.KJAX.SV.W.0004.210127T2012Z-210127T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
312 PM EST Wed Jan 27 2021
The National Weather Service in Jacksonville has issued a
* Severe Thunderstorm Warning for...
Southwestern Nassau County in northeastern Florida...
Southeastern Baker County in northeastern Florida...
Northwestern Clay County in northeastern Florida...
Duval County in northeastern Florida...
* Until 415 PM EST.
* At 311 PM EST, a severe thunderstorm was located over Macclenny, or
18 miles north of Raiford, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Jacksonville, Orange Park, Unf, Mandarin, Arlington, Macclenny,
Glen St. Mary, Baymeadows, Cisco Gardens and Ortega.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3014 8151 3014 8240 3038 8220 3036 8216
3037 8211 3036 8206 3037 8204 3039 8204
3043 8148
TIME...MOT...LOC 2011Z 271DEG 35KT 3031 8213
HAIL...<.75IN
WIND...60MPH
$$
SHASHY3 follow-up statements
282
WWUS52 KJAX 272024
SVSJAX
Severe Weather Statement
National Weather Service Jacksonville FL
324 PM EST Wed Jan 27 2021
FLC003-019-031-089-272115-
/O.CON.KJAX.SV.W.0004.000000T0000Z-210127T2115Z/
Nassau FL-Baker FL-Clay FL-Duval FL-
324 PM EST Wed Jan 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EST
FOR SOUTHWESTERN NASSAU...SOUTHEASTERN BAKER...NORTHWESTERN CLAY AND
DUVAL COUNTIES...
At 324 PM EST, a severe thunderstorm was located near Bryceville, or
18 miles north of Middleburg, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Jacksonville, Orange Park, Unf, Mandarin, Arlington, Macclenny, Glen
St. Mary, Baymeadows, Cisco Gardens and Ortega.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor
of a building. This storm may cause serious injury and significant
property damage.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3014 8151 3014 8240 3038 8220 3036 8216
3037 8211 3036 8206 3037 8204 3039 8204
3043 8148
TIME...MOT...LOC 2024Z 269DEG 33KT 3030 8200
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
SHASHY996
WWUS52 KJAX 272040
SVSJAX
Severe Weather Statement
National Weather Service Jacksonville FL
340 PM EST Wed Jan 27 2021
FLC089-272049-
/O.CAN.KJAX.SV.W.0004.000000T0000Z-210127T2115Z/
Nassau FL-
340 PM EST Wed Jan 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NASSAU 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 3014 8151 3014 8225 3021 8213 3027 8205
3035 8196 3043 8148
TIME...MOT...LOC 2039Z 271DEG 35KT 3030 8184
$$
FLC003-019-031-272115-
/O.CON.KJAX.SV.W.0004.000000T0000Z-210127T2115Z/
Baker FL-Clay FL-Duval FL-
340 PM EST Wed Jan 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EST
FOR SOUTHEASTERN BAKER...NORTHWESTERN CLAY AND SOUTHERN DUVAL
COUNTIES...
At 339 PM EST, a severe thunderstorm was located near Normandy, or 10
miles west of Jacksonville, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Jacksonville, Orange Park, Unf, Mandarin, Arlington, Maxville,
Baymeadows, Ortega, Craig Field and Oakleaf Plantation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3014 8151 3014 8225 3021 8213 3027 8205
3035 8196 3043 8148
TIME...MOT...LOC 2039Z 271DEG 35KT 3030 8184
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
SHASHY510
WWUS52 KJAX 272116
SVSJAX
Severe Weather Statement
National Weather Service Jacksonville FL
416 PM EST Wed Jan 27 2021
FLC003-019-031-272125-
/O.EXP.KJAX.SV.W.0004.000000T0000Z-210127T2115Z/
Baker FL-Clay FL-Duval FL-
416 PM EST Wed Jan 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BAKER...
NORTHWESTERN CLAY AND SOUTHERN DUVAL COUNTIES HAS EXPIRED...
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 allowed to expire. However gusty
winds are still possible with this thunderstorm.
LAT...LON 3014 8151 3014 8225 3021 8213 3027 8205
3035 8196 3043 8148
TIME...MOT...LOC 2115Z 271DEG 35KT 3029 8144
$$
SHASHYThe office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 27, 1:58 AM EST | Dense Fog Advisory | JAX | Alachua, Bradford, Flagler, Marion | 7 hr |
| Jan 27, 2:02 AM EST | Gale Warning | JAX | 36 hr | |
| Jan 27, 2:02 AM EST | Small Craft Advisory | JAX | 19 hr | |
| Jan 27, 12:39 PM EST | Special Weather Statement | JAX | Hamilton | 36 min |
| Jan 27, 12:57 PM EST | Severe Thunderstorm Warning | JAX | Hamilton, Suwannee | 48 min |
| Jan 27, 1:42 PM EST | Severe Thunderstorm Warning | JAX | Columbia, Hamilton, Suwannee | 63 min |
| Jan 27, 1:47 PM EST | Tornado Warning | JAX | Hamilton, Suwannee | 28 min |
| Jan 27, 2:04 PM EST | Tornado Warning | JAX | Columbia, Hamilton, Suwannee | 41 min |
| Jan 27, 2:34 PM EST | Severe Thunderstorm Warning | JAX | Baker, Columbia | 41 min |
| Jan 27, 3:06 PM EST | Special Weather Statement | JAX | Gilchrist | 54 min |
| Jan 27, 3:35 PM EST | Special Weather Statement | JAX | Clay, Union | 40 min |
| Jan 27, 3:54 PM EST | Special Weather Statement | JAX | Alachua | 51 min |
| Jan 27, 3:59 PM EST | Tornado Warning | JAX | Clay, Duval, Saint Johns | 19 min |
| Jan 27, 4:04 PM EST | Special Marine Warning | JAX | 86 min | |
| Jan 27, 4:08 PM EST | Special Weather Statement | JAX | Duval | 37 min |
| Jan 27, 4:32 PM EST | Special Weather Statement | JAX | Marion | 58 min |
| Jan 27, 5:23 PM EST | Special Weather Statement | JAX | Marion | 37 min |
| Jan 27, 6:02 PM EST | Special Weather Statement | JAX | Marion | 43 min |
Nearby
Severe Thunderstorm Warnings in Florida, 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.