Alert archive / Florida / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 183, NWS Jacksonville, FL

August 10, 2026Duval County, Nassau County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Aug 10, 2026, 3:46 PM EDT for Duval County, Nassau County, Florida. It was in force for 29 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
Aug 10, 2026, 3:46 PM EDT (19:46 UTC)
Expired
Aug 10, 2026, 4:15 PM EDT
In force
29 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon
Hail
1.0 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 19:48 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

Charleston AFB, SC (KCHS), launched 12:00Z, 7.8 hours before the alert went out and 315 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-pSkew-T log-p diagram, Charleston AFB, SC at 12:00Z on 2026-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1172 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2026-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1172 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1033 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 2:10 PM EDTSpecial Weather StatementJAXDuval, Nassau35 min
Aug 10, 2:29 PM EDTSpecial Weather StatementJAXDuval31 min
Aug 10, 2:47 PM EDTSpecial Weather StatementJAXDuval, Nassau28 min
Aug 10, 3:11 PM EDTSpecial Weather StatementJAXDuval34 min
Aug 10, 3:13 PM EDTSpecial Marine WarningJAX62 min
Aug 10, 3:15 PM EDTSpecial Weather StatementJAXBradford30 min
Aug 10, 3:33 PM EDTSpecial Weather StatementJAXSaint Johns27 min
Aug 10, 3:47 PM EDTSpecial Marine WarningJAX25 min
Aug 10, 3:50 PM EDTAreal Flood AdvisoryJAXBradford90 min
Aug 10, 3:59 PM EDTSpecial Weather StatementJAXSaint Johns31 min
Aug 10, 4:31 PM EDTSpecial Weather StatementJAXPutnam, Saint Johns29 min
Aug 10, 5:00 PM EDTSpecial Weather StatementJAXPutnam30 min
Aug 10, 5:13 PM EDTSpecial Weather StatementJAXAlachua32 min
Aug 10, 4:10 PM EDTSpecial Weather StatementJAXCamden35 min
Aug 10, 6:07 PM EDTSpecial Weather StatementJAXGlynn38 min
Aug 10, 7:09 PM EDTSpecial Weather StatementJAXCharlton36 min
Aug 10, 7:57 PM EDTSpecial Weather StatementJAXCharlton33 min

Nearby

Severe Thunderstorm Warnings in Florida, 2026Every severe thunderstorm warning in 2026

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.