Alert archive / Florida / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 293, NWS Jacksonville, FL

September 11, 2023Duval County, Nassau County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Sep 11, 2023, 3:13 PM EDT for Duval County, Nassau County, Florida. 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 counties it named.

The facts

Issued: Sep 11, 2023, 3:13 PM EDT (19:13 UTC)
Expired: Sep 11, 2023, 3:49 PM EDT
In force: 36 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Duval County, FL, Nassau County, FL

The radar

The Jacksonville radar (KJAX), 1 km from the middle of the area, began a volume at 19:17 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 7.2 hours before the alert went out and 252 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: 1836 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 797 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 2:00 AM EDT	Rip Current Statement	JAX	Duval, Flagler, Nassau	8 days
Sep 11, 1:38 PM EDT	Special Weather Statement	JAX	Duval	52 min
Sep 11, 2:01 PM EDT	Severe Thunderstorm Warning	JAX	Duval, Saint Johns	17 min
Sep 11, 2:27 PM EDT	Special Weather Statement	JAX	Duval	33 min
Sep 11, 2:34 PM EDT	Special Weather Statement	JAX	Nassau	41 min
Sep 11, 2:59 PM EDT	Severe Thunderstorm Warning	JAX	Nassau	26 min
Sep 11, 3:04 PM EDT	Special Weather Statement	JAX	Saint Johns	41 min
Sep 11, 3:27 PM EDT	Special Weather Statement	JAX	Nassau	48 min
Sep 11, 3:49 PM EDT	Special Weather Statement	JAX	Duval	41 min
Sep 11, 3:52 PM EDT	Severe Thunderstorm Warning	JAX	Marion	38 min
Sep 11, 4:10 PM EDT	Special Weather Statement	JAX	Clay	35 min
Sep 11, 4:13 PM EDT	Special Weather Statement	JAX	Duval	47 min
Sep 11, 4:15 PM EDT	Areal Flood Advisory	JAX	Marion	34 min
Sep 11, 4:22 PM EDT	Severe Thunderstorm Warning	JAX	Duval	23 min
Sep 11, 4:25 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Saint Johns	35 min
Sep 11, 4:28 PM EDT	Special Weather Statement	JAX	Baker	47 min
Sep 11, 4:33 PM EDT	Special Weather Statement	JAX	Alachua	27 min
Sep 11, 4:42 PM EDT	Areal Flood Advisory	JAX	Duval	72 min
Sep 11, 4:53 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Marion, Putnam	26 min
Sep 11, 4:55 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Saint Johns	35 min
Sep 11, 5:07 PM EDT	Special Weather Statement	JAX	Clay	38 min
Sep 11, 5:26 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Saint Johns	34 min
Sep 11, 5:30 PM EDT	Special Weather Statement	JAX	Putnam	45 min
Sep 11, 5:36 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Putnam	39 min
Sep 11, 5:44 PM EDT	Special Weather Statement	JAX	Bradford, Clay	46 min
Sep 11, 5:48 PM EDT	Areal Flood Advisory	JAX	Clay	88 min
Sep 11, 5:50 PM EDT	Areal Flood Advisory	JAX	Clay, Saint Johns	2 hr
Sep 11, 5:56 PM EDT	Severe Thunderstorm Warning	JAX	Saint Johns	49 min
Sep 11, 6:08 PM EDT	Areal Flood Advisory	JAX	Clay, Putnam	69 min
Sep 11, 6:08 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Bradford, Columbia, Union	52 min
Sep 11, 6:12 PM EDT	Special Weather Statement	JAX	Saint Johns	63 min
Sep 11, 6:28 PM EDT	Special Weather Statement	JAX	Putnam	47 min
Sep 11, 6:37 PM EDT	Special Weather Statement	JAX	Union	53 min
Sep 11, 6:44 PM EDT	Severe Thunderstorm Warning	JAX	Flagler, Putnam, Saint Johns	46 min
Sep 11, 6:48 PM EDT	Special Marine Warning	JAX		57 min
Sep 11, 6:52 PM EDT	Special Weather Statement	JAX	Alachua	38 min
Sep 11, 6:55 PM EDT	Special Weather Statement	JAX	Saint Johns	35 min
Sep 11, 6:56 PM EDT	Areal Flood Advisory	JAX	Putnam	85 min
Sep 11, 6:56 PM EDT	Special Weather Statement	JAX	Putnam	49 min
Sep 11, 7:12 PM EDT	Special Weather Statement	JAX	Marion	33 min
Sep 11, 7:21 PM EDT	Special Weather Statement	JAX	Flagler	39 min
Sep 11, 7:34 PM EDT	Severe Thunderstorm Warning	JAX	Flagler	21 min
Sep 11, 7:43 PM EDT	Special Weather Statement	JAX	Columbia	32 min
Sep 11, 7:56 PM EDT	Special Weather Statement	JAX	Flagler	34 min
Sep 11, 2:16 PM EDT	Special Weather Statement	JAX	Charlton	44 min
Sep 11, 2:36 PM EDT	Special Weather Statement	JAX	Camden	39 min
Sep 11, 2:54 PM EDT	Special Weather Statement	JAX	Camden	51 min
Sep 11, 3:09 PM EDT	Severe Thunderstorm Warning	JAX	Camden	35 min
Sep 11, 3:30 PM EDT	Areal Flood Advisory	JAX	Camden	45 min
Sep 11, 3:41 PM EDT	Special Weather Statement	JAX	Brantley	49 min
Sep 11, 3:44 PM EDT	Special Weather Statement	JAX	Glynn	31 min
Sep 11, 4:11 PM EDT	Special Weather Statement	JAX	Ware	49 min
Sep 11, 4:30 PM EDT	Special Weather Statement	JAX	Wayne	45 min
Sep 11, 4:56 PM EDT	Special Weather Statement	JAX	Pierce	34 min
Sep 11, 5:03 PM EDT	Severe Thunderstorm Warning	JAX	Brantley, Pierce	27 min
Sep 11, 5:24 PM EDT	Severe Thunderstorm Warning	JAX	Brantley, Pierce, Wayne	36 min
Sep 11, 5:47 PM EDT	Special Weather Statement	JAX	Charlton	43 min
Sep 11, 6:34 PM EDT	Special Weather Statement	JAX	Charlton	41 min

Nearby

Severe Thunderstorm Warnings in Florida, 2023 Every severe thunderstorm warning in 2023

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.