Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 110, NWS Jacksonville, FL

June 15, 20217 counties in Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 15, 2021, 5:26 PM EDT for 7 counties in Florida. It was in force for 49 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: Jun 15, 2021, 5:26 PM EDT (21:26 UTC)
Expired: Jun 15, 2021, 6:15 PM EDT
In force: 49 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Nassau County, FL, Union County, FL

The radar

The Jacksonville radar (KJAX), 47 km from the middle of the area, began a volume at 21:25 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, 9.4 hours before the alert went out and 48 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 3840 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1021 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

914 
WUUS52 KJAX 152126
SVRJAX
FLC003-007-019-023-031-089-125-152215-
/O.NEW.KJAX.SV.W.0110.210615T2126Z-210615T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
526 PM EDT Tue Jun 15 2021

The National Weather Service in Jacksonville has issued a

* Severe Thunderstorm Warning for...
  Southwestern Nassau County in northeastern Florida...
  Northeastern Bradford County in northern Florida...
  Southern Baker County in northeastern Florida...
  Northeastern Union County in northern Florida...
  East central Columbia County in northern Florida...
  Northwestern Clay County in northeastern Florida...
  Southwestern Duval County in northeastern Florida...

* Until 615 PM EDT.

* At 526 PM EDT, severe thunderstorms were located along a line
  extending from near Cecil Field to 7 miles northeast of Five
  Points, moving southeast at 15 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...
  Macclenny, Glen St. Mary, Cecil Field, Maxville, Olustee,
  Sanderson, Oakleaf Plantation, Lakeside and Baldwin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3031 8185 3011 8177 3015 8249 3035 8257
TIME...MOT...LOC 2126Z 314DEG 21KT 3025 8188 3030 8255 

HAIL...1.00IN
WIND...60MPH
 
$$

BOOTHE

1 follow-up statement

036 
WWUS52 KJAX 152212 RRA
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
612 PM EDT Tue Jun 15 2021

FLC003-007-019-023-031-089-125-152222-
/O.EXP.KJAX.SV.W.0110.000000T0000Z-210615T2215Z/
Nassau FL-Bradford FL-Baker FL-Union FL-Columbia FL-Clay FL-Duval FL-
612 PM EDT Tue Jun 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NASSAU...
NORTHEASTERN BRADFORD...SOUTHERN BAKER...NORTHEASTERN UNION...EAST
CENTRAL COLUMBIA...NORTHWESTERN CLAY AND SOUTHWESTERN DUVAL COUNTIES
WILL EXPIRE AT 615 PM EDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

LAT...LON 3031 8185 3011 8177 3015 8249 3035 8257
TIME...MOT...LOC 2212Z 314DEG 21KT 3007 8167 3012 8234 

$$

23

The office that day

Everything else NWS Jacksonville, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 15, 2:42 AM EDT	Small Craft Advisory	JAX		25 hr
Jun 15, 9:00 AM EDT	Special Weather Statement	JAX	Marion	45 min
Jun 15, 2:04 PM EDT	Special Weather Statement	JAX	Marion	41 min
Jun 15, 2:17 PM EDT	Severe Thunderstorm Warning	JAX	Marion	22 min
Jun 15, 2:32 PM EDT	Special Weather Statement	JAX	Suwannee	43 min
Jun 15, 2:36 PM EDT	Special Weather Statement	JAX	Flagler	39 min
Jun 15, 3:00 PM EDT	Severe Thunderstorm Warning	JAX	Suwannee	30 min
Jun 15, 3:10 PM EDT	Special Weather Statement	JAX	Columbia	50 min
Jun 15, 3:30 PM EDT	Severe Thunderstorm Warning	JAX	Columbia, Suwannee, Union	45 min
Jun 15, 3:33 PM EDT	Special Marine Warning	JAX		57 min
Jun 15, 3:39 PM EDT	Special Weather Statement	JAX	Bradford	51 min
Jun 15, 3:43 PM EDT	Special Weather Statement	JAX	Baker	47 min
Jun 15, 3:49 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Bradford, Union	41 min
Jun 15, 3:55 PM EDT	Special Marine Warning	JAX		65 min
Jun 15, 3:56 PM EDT	Special Weather Statement	JAX	Saint Johns	34 min
Jun 15, 3:59 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Bradford, Clay	46 min
Jun 15, 4:02 PM EDT	Special Weather Statement	JAX	Clay	43 min
Jun 15, 4:14 PM EDT	Special Weather Statement	JAX	Hamilton	46 min
Jun 15, 4:15 PM EDT	Severe Thunderstorm Warning	JAX	Bradford, Clay, Duval, Putnam	45 min
Jun 15, 4:18 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Columbia, Hamilton	27 min
Jun 15, 4:19 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Bradford, Union	41 min
Jun 15, 4:21 PM EDT	Special Marine Warning	JAX		39 min
Jun 15, 4:26 PM EDT	Special Marine Warning	JAX		49 min
Jun 15, 4:33 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Nassau	27 min
Jun 15, 4:36 PM EDT	Special Weather Statement	JAX	Nassau	54 min
Jun 15, 4:40 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Columbia, Hamilton	50 min
Jun 15, 4:45 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Bradford, Clay, Putnam	45 min
Jun 15, 4:47 PM EDT	Severe Thunderstorm Warning	JAX	Hamilton, Suwannee	43 min
Jun 15, 4:50 PM EDT	Special Marine Warning	JAX		55 min
Jun 15, 4:54 PM EDT	Special Weather Statement	JAX	Duval	51 min
Jun 15, 4:54 PM EDT	Severe Thunderstorm Warning	JAX	Nassau	36 min
Jun 15, 4:59 PM EDT	Special Marine Warning	JAX		61 min
Jun 15, 5:07 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Duval, Saint Johns	23 min
Jun 15, 5:09 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Duval, Nassau	22 min
Jun 15, 5:10 PM EDT	Special Marine Warning	JAX		95 min
Jun 15, 5:12 PM EDT	Severe Thunderstorm Warning	JAX	Nassau	48 min
Jun 15, 5:15 PM EDT	Severe Thunderstorm Warning	JAX	Alachua	30 min
Jun 15, 5:29 PM EDT	Areal Flood Warning	JAX	Alachua, Bradford	2 hr
Jun 15, 5:30 PM EDT	Severe Thunderstorm Warning	JAX	Columbia, Hamilton, Suwannee	30 min
Jun 15, 5:30 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Duval, Nassau	45 min
Jun 15, 5:35 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Bradford, Clay, Putnam	25 min
Jun 15, 5:36 PM EDT	Severe Thunderstorm Warning	JAX	Duval, Saint Johns	24 min
Jun 15, 5:46 PM EDT	Severe Thunderstorm Warning	JAX	Flagler, Putnam, Saint Johns	44 min
Jun 15, 5:47 PM EDT	Special Marine Warning	JAX		58 min
Jun 15, 5:48 PM EDT	Special Weather Statement	JAX	Alachua	42 min
Jun 15, 5:54 PM EDT	Severe Thunderstorm Warning	JAX	Hamilton, Suwannee	51 min
Jun 15, 5:57 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Marion, Putnam	48 min
Jun 15, 6:01 PM EDT	Severe Thunderstorm Warning	JAX	Duval, Saint Johns	44 min
Jun 15, 6:07 PM EDT	Special Weather Statement	JAX	Alachua	23 min
Jun 15, 6:17 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Columbia, Hamilton, Union	43 min
Jun 15, 6:19 PM EDT	Special Weather Statement	JAX	Union	41 min
Jun 15, 6:26 PM EDT	Special Marine Warning	JAX		94 min
Jun 15, 6:33 PM EDT	Special Weather Statement	JAX	Columbia	27 min
Jun 15, 6:40 PM EDT	Special Weather Statement	JAX	Flagler	50 min
Jun 15, 6:46 PM EDT	Special Weather Statement	JAX	Marion	44 min
Jun 15, 6:48 PM EDT	Special Weather Statement	JAX	Gilchrist	42 min
Jun 15, 6:53 PM EDT	Special Marine Warning	JAX		97 min
Jun 15, 7:03 PM EDT	Special Weather Statement	JAX	Union	42 min
Jun 15, 7:12 PM EDT	Special Weather Statement	JAX	Gilchrist	48 min
Jun 15, 7:26 PM EDT	Areal Flood Warning	JAX	Alachua, Marion	2 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2021 Every 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.