Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 28, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 10, 2021, 2:59 PM EDT for Columbia County, Hamilton County, Florida; Clinch County, Echols County, Georgia. It was in force for 46 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 10, 2021, 2:59 PM EDT (18:59 UTC)
- Expired
- Apr 10, 2021, 3:45 PM EDT
- In force
- 46 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Columbia County, FL, Hamilton County, FL, Clinch County, GA, Echols County, GA
The radar
The Moody AFB radar (KVAX), 46 km from the middle of the area, began a volume at 18:58 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 10, 3:14 PM EDT | TSTM WND DMG | 4 Ssw Fargo, GA | TREES DOWN ON US-441 NORTH BOUND, BLOCKING THE ROAD, NEAR MILE MARKER 4. TIME ESTIMATED BASED ON RADAR DATA. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 7.0 hours before the alert went out and 86 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
- 159 J/kg
- Mixed-layer CIN
- -225 J/kg
- Mixed-layer LCL
- 965 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
152
WUUS52 KJAX 101859
SVRJAX
FLC023-047-GAC065-101-101945-
/O.NEW.KJAX.SV.W.0028.210410T1859Z-210410T1945Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
259 PM EDT Sat Apr 10 2021
The National Weather Service in Jacksonville has issued a
* Severe Thunderstorm Warning for...
Northeastern Columbia County in northern Florida...
Northeastern Hamilton County in northern Florida...
Southeastern Echols County in southeastern Georgia...
Southeastern Clinch County in southeastern Georgia...
* Until 345 PM EDT.
* At 259 PM EDT, severe thunderstorms were located along a line
extending from 12 miles north of Needmore to Belmont, moving
northeast at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Fargo, Belmont and Needmore.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3092 8282 3100 8256 3096 8252 3096 8249
3082 8250 3073 8243 3073 8242 3072 8243
3058 8242 3058 8246 3049 8246 3042 8284
TIME...MOT...LOC 1859Z 245DEG 30KT 3085 8273 3048 8274
HAIL...0.75IN
WIND...60MPH
$$
KB2 follow-up statements
361
WWUS52 KJAX 101925
SVSJAX
Severe Weather Statement
National Weather Service Jacksonville FL
325 PM EDT Sat Apr 10 2021
FLC047-101935-
/O.CAN.KJAX.SV.W.0028.000000T0000Z-210410T1945Z/
Hamilton FL-
325 PM EDT Sat Apr 10 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HAMILTON COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3097 8263 3100 8256 3096 8252 3096 8249
3082 8250 3073 8243 3073 8242 3072 8243
3058 8242 3058 8246 3049 8246 3045 8267
3046 8268
TIME...MOT...LOC 1925Z 245DEG 30KT 3094 8251 3057 8253
$$
FLC023-GAC065-101-101945-
/O.CON.KJAX.SV.W.0028.000000T0000Z-210410T1945Z/
Columbia FL-Echols GA-Clinch GA-
325 PM EDT Sat Apr 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR NORTHEASTERN COLUMBIA...SOUTHEASTERN ECHOLS AND SOUTHEASTERN
CLINCH COUNTIES...
At 325 PM EDT, severe thunderstorms were located along a line
extending from 11 miles south of Manor to 8 miles south of Fargo,
moving northeast at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Fargo.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3097 8263 3100 8256 3096 8252 3096 8249
3082 8250 3073 8243 3073 8242 3072 8243
3058 8242 3058 8246 3049 8246 3045 8267
3046 8268
TIME...MOT...LOC 1925Z 245DEG 30KT 3094 8251 3057 8253
HAIL...0.75IN
WIND...60MPH
$$
KB364
WWUS52 KJAX 101943
SVSJAX
Severe Weather Statement
National Weather Service Jacksonville FL
343 PM EDT Sat Apr 10 2021
FLC023-GAC065-101-101952-
/O.EXP.KJAX.SV.W.0028.000000T0000Z-210410T1945Z/
Columbia FL-Echols GA-Clinch GA-
343 PM EDT Sat Apr 10 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN COLUMBIA...
SOUTHEASTERN ECHOLS AND SOUTHEASTERN CLINCH COUNTIES WILL EXPIRE AT
345 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.
LAT...LON 3097 8263 3100 8256 3096 8252 3096 8249
3082 8250 3073 8243 3073 8242 3072 8243
3058 8242 3058 8246 3049 8246 3045 8267
3046 8268
TIME...MOT...LOC 1942Z 245DEG 30KT 3094 8251 3057 8253
$$
KBThe office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 2:30 AM EDT | Small Craft Advisory | JAX | 24 hr | |
| Apr 10, 2:33 AM EDT | Rip Current Statement | JAX | Duval, Flagler, Nassau | 17 hr |
| Apr 10, 1:41 PM EDT | Special Weather Statement | JAX | Hamilton, Suwannee | 64 min |
| Apr 10, 2:18 PM EDT | Severe Thunderstorm Warning | JAX | Hamilton, Suwannee | 42 min |
| Apr 10, 2:45 PM EDT | Special Weather Statement | JAX | Columbia, Hamilton, Suwannee | 60 min |
| Apr 10, 3:34 PM EDT | Special Weather Statement | JAX | Alachua, Bradford, Marion, Union | 56 min |
| Apr 10, 3:34 PM EDT | Special Weather Statement | JAX | Baker | 56 min |
| Apr 10, 4:08 PM EDT | Special Weather Statement | JAX | Nassau | 67 min |
| Apr 10, 4:14 PM EDT | Special Marine Warning | JAX | 61 min | |
| Apr 10, 4:29 PM EDT | Special Weather Statement | JAX | Bradford, Clay, Duval, Putnam | 61 min |
| Apr 10, 4:44 PM EDT | Severe Thunderstorm Warning | JAX | Duval, Nassau | 34 min |
| Apr 10, 4:57 PM EDT | Special Weather Statement | JAX | Duval | 33 min |
| Apr 10, 4:58 PM EDT | Special Marine Warning | JAX | 2 hr | |
| Apr 10, 5:12 PM EDT | Special Marine Warning | JAX | 111 min | |
| Apr 10, 5:15 PM EDT | Special Weather Statement | JAX | Flagler, Putnam, Saint Johns | 60 min |
| Apr 10, 5:15 PM EDT | Special Weather Statement | JAX | Flagler, Putnam, Saint Johns | 60 min |
| Apr 10, 6:11 PM EDT | Special Marine Warning | JAX | 2 hr | |
| Apr 10, 7:08 PM EDT | Special Marine Warning | JAX | 67 min | |
| Apr 10, 2:13 PM EDT | Severe Thunderstorm Warning | JAX | Clinch | 47 min |
| Apr 10, 4:39 PM EDT | Special Weather Statement | JAX | Camden, Glynn | 51 min |
| Apr 10, 4:49 PM EDT | Tornado Warning | JAX | Camden, Glynn | 26 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.