Alert archive / Florida / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 71, NWS Jacksonville, FL

April 26, 2023Duval County, Nassau County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 26, 2023, 4:38 PM EDT for Duval County, Nassau County, Florida. It was in force for 37 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: Apr 26, 2023, 4:38 PM EDT (20:38 UTC)
Expired: Apr 26, 2023, 5:15 PM EDT
In force: 37 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Damage threat: Considerable
Hail: 2.0 in
Wind: 70.0 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 20:39 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, 8.6 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: 1333 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 864 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 26, 3:11 PM EDT, 1 hour 27 minutes earlier.

Area forecast discussion, Apr 26, 3:11 PM EDT, 1 hour 27 minutes before

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In the hours before

Local storm report, Apr 26, 3:32 PM EDT, 1 hour 6 minutes before

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Special weather statement, Apr 26, 3:45 PM EDT, 53 minutes before

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Local storm report, Apr 26, 3:52 PM EDT, 46 minutes before

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Local storm report, Apr 26, 3:54 PM EDT, 44 minutes before

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Local storm report, Apr 26, 3:58 PM EDT, 40 minutes before

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Special weather statement, Apr 26, 4:28 PM EDT, 10 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 9:14 PM EDT	Special Weather Statement	JAX	Hamilton	46 min
Apr 26, 3:30 PM EDT	Severe Thunderstorm Warning Considerable damage threat	JAX	Nassau	19 min
Apr 26, 3:45 PM EDT	Special Weather Statement	JAX	Nassau	45 min
Apr 26, 4:14 PM EDT	Severe Thunderstorm Warning	JAX	Nassau	46 min
Apr 26, 5:03 PM EDT	Special Weather Statement	JAX	Nassau	57 min
Apr 26, 5:18 PM EDT	Special Weather Statement	JAX	Clay	42 min
Apr 26, 5:27 PM EDT	Severe Thunderstorm Warning	JAX	Duval	33 min
Apr 26, 5:36 PM EDT	Severe Thunderstorm Warning	JAX	Clay	24 min
Apr 26, 5:53 PM EDT	Special Weather Statement	JAX	Duval	37 min
Apr 26, 5:58 PM EDT	Severe Thunderstorm Warning	JAX	Clay	47 min
Apr 26, 6:27 PM EDT	Special Weather Statement	JAX	Marion	48 min
Apr 26, 6:37 PM EDT	Special Weather Statement	JAX	Bradford	38 min
Apr 26, 6:40 PM EDT	Special Weather Statement	JAX	Clay	35 min
Apr 26, 6:50 PM EDT	Special Weather Statement	JAX	Gilchrist	40 min
Apr 26, 6:53 PM EDT	Special Weather Statement	JAX	Marion	37 min
Apr 26, 6:59 PM EDT	Severe Thunderstorm Warning	JAX	Marion	46 min
Apr 26, 7:01 PM EDT	Severe Thunderstorm Warning	JAX	Bradford	44 min
Apr 26, 7:09 PM EDT	Special Weather Statement	JAX	Suwannee	36 min
Apr 26, 7:15 PM EDT	Special Weather Statement	JAX	Alachua	45 min
Apr 26, 7:19 PM EDT	Special Weather Statement	JAX	Bradford	41 min
Apr 26, 7:24 PM EDT	Severe Thunderstorm Warning	JAX	Marion	36 min
Apr 26, 7:29 PM EDT	Special Weather Statement	JAX	Union	46 min
Apr 26, 7:32 PM EDT	Special Weather Statement	JAX	Hamilton	43 min
Apr 26, 7:40 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Marion	35 min
Apr 26, 7:44 PM EDT	Severe Thunderstorm Warning Considerable damage threat	JAX	Marion	46 min
Apr 26, 7:48 PM EDT	Special Weather Statement	JAX	Columbia	42 min
Apr 26, 7:51 PM EDT	Special Weather Statement	JAX	Alachua	39 min
Apr 25, 10:29 PM EDT	Special Weather Statement	JAX	Echols	31 min
Apr 25, 10:55 PM EDT	Special Weather Statement	JAX	Echols	35 min
Apr 26, 1:42 PM EDT	Special Weather Statement	JAX	Wayne	33 min
Apr 26, 2:12 PM EDT	Special Weather Statement	JAX	Wayne	33 min
Apr 26, 2:30 PM EDT	Severe Thunderstorm Warning	JAX	Wayne	30 min
Apr 26, 2:46 PM EDT	Special Weather Statement	JAX	Charlton	44 min
Apr 26, 2:59 PM EDT	Severe Thunderstorm Warning	JAX	Glynn, Wayne	31 min
Apr 26, 3:32 PM EDT	Special Weather Statement	JAX	Glynn	43 min
Apr 26, 4:28 PM EDT	Special Weather Statement	JAX	Brantley	47 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.