Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 98, NWS Jacksonville, FL

June 15, 20214 counties in Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 15, 2021, 4:15 PM EDT for 4 counties in Florida. It was in force for 45 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, 4:15 PM EDT (20:15 UTC)
Expired: Jun 15, 2021, 5:00 PM EDT
In force: 45 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Bradford County, FL, Clay County, FL, Duval County, FL, Putnam County, FL

The radar

The Jacksonville radar (KJAX), 64 km from the middle of the area, began a volume at 20:18 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, 8.3 hours before the alert went out and 66 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.

750 
WUUS52 KJAX 152015
SVRJAX
FLC007-019-031-107-152100-
/O.NEW.KJAX.SV.W.0098.210615T2015Z-210615T2100Z/

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

The National Weather Service in Jacksonville has issued a

* Severe Thunderstorm Warning for...
  Northeastern Bradford County in northern Florida...
  Northwestern Putnam County in northeastern Florida...
  Clay County in northeastern Florida...
  South central Duval County in northeastern Florida...

* Until 500 PM EDT.

* At 414 PM EDT, severe thunderstorms were located along a line
  extending from 6 miles southwest of Maxville to near Keystone
  Heights, moving east 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...
  Keystone Heights, Middleburg, George's Lake, Oakleaf Plantation,
  Bellair-Meadowbrook Terrace, Lake Geneva, Florahome, Camp Blanding,
  Doctors Inlet and Lakeside.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2969 8173 2975 8206 2976 8207 3014 8209
      3014 8205 3016 8205 3023 8174
TIME...MOT...LOC 2014Z 283DEG 11KT 3011 8207 2989 8206 

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

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, 4:18 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, 5:26 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Bradford, Clay, Columbia, Duval, Nassau and 1 more	49 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.