Alert archive / Florida / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 115, NWS Jacksonville, FL

June 13, 2015Duval County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 13, 2015, 3:20 PM EDT for Duval County, Florida. It was in force for 23 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: Jun 13, 2015, 3:20 PM EDT (19:20 UTC)
Expired: Jun 13, 2015, 3:43 PM EDT
In force: 23 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

County Duval County, FL

The radar

The Jacksonville radar (KJAX), 17 km from the middle of the area, began a volume at 19:23 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.3 hours before the alert went out and 255 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: 490 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 1059 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 23 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
Jun 13, 3:14 PM EDT	Special Weather Statement	JAX	Duval	46 min
Jun 13, 4:15 PM EDT	Special Weather Statement	JAX	Clay	30 min
Jun 13, 5:03 PM EDT	Special Weather Statement	JAX	Columbia	42 min
Jun 13, 5:16 PM EDT	Special Weather Statement	JAX	Baker	44 min
Jun 13, 5:26 PM EDT	Special Weather Statement	JAX	Baker	49 min
Jun 13, 5:54 PM EDT	Special Weather Statement	JAX	Baker	51 min
Jun 13, 6:45 PM EDT	Special Weather Statement	JAX	Hamilton	45 min
Jun 13, 6:51 PM EDT	Special Weather Statement	JAX	Union	24 min
Jun 13, 7:05 PM EDT	Special Weather Statement	JAX	Alachua	40 min
Jun 12, 8:07 PM EDT	Special Weather Statement	JAX	Atkinson	38 min
Jun 13, 5:34 PM EDT	Special Weather Statement	JAX	Lowndes	41 min
Jun 13, 5:47 PM EDT	Severe Thunderstorm Warning	JAX	Echols	28 min
Jun 13, 6:07 PM EDT	Special Weather Statement	JAX	Echols	38 min
Jun 13, 7:25 PM EDT	Special Weather Statement	JAX	Brantley	35 min
Jun 13, 7:57 PM EDT	Severe Thunderstorm Warning	JAX	Brantley, Pierce, Ware	33 min

Nearby

Severe Thunderstorm Warnings in Florida, 2015 Every severe thunderstorm warning in 2015

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.