Alert archive / Florida / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 206, NWS Jacksonville, FL

July 5, 2015Duval County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 5, 2015, 4:52 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: Jul 5, 2015, 4:52 PM EDT (20:52 UTC)
Expired: Jul 5, 2015, 5:15 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 20:53 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, 8.9 hours before the alert went out and 19 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: 632 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 1171 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 5, 3:12 PM EDT, 1 hour 40 minutes earlier.

Area forecast discussion, Jul 5, 3:12 PM EDT, 1 hour 40 minutes before

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Hazardous weather outlook, Jul 5, 3:26 PM EDT, 1 hour 26 minutes before

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In the hours before

Special weather statement, Jul 5, 4:16 PM EDT, 36 minutes before

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Local storm report, Jul 5, 4:25 PM EDT, 27 minutes before

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Special weather statement, Jul 5, 4:33 PM EDT, 19 minutes before

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Special weather statement, Jul 5, 4:36 PM EDT, 16 minutes before

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Special weather statement, Jul 5, 4:45 PM EDT, 7 minutes before

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Special weather statement, Jul 5, 4:52 PM EDT, 0 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
Jul 5, 2:10 PM EDT	Special Weather Statement	JAX	Hamilton	50 min
Jul 5, 2:19 PM EDT	Special Weather Statement	JAX	Gilchrist	41 min
Jul 5, 2:22 PM EDT	Severe Thunderstorm Warning	JAX	Hamilton	23 min
Jul 5, 2:29 PM EDT	Special Weather Statement	JAX	Columbia	46 min
Jul 5, 2:47 PM EDT	Special Weather Statement	JAX	Union	43 min
Jul 5, 3:14 PM EDT	Special Weather Statement	JAX	Alachua	46 min
Jul 5, 3:19 PM EDT	Special Weather Statement	JAX	Marion	41 min
Jul 5, 3:23 PM EDT	Special Weather Statement	JAX	Nassau	52 min
Jul 5, 3:28 PM EDT	Special Weather Statement	JAX	Baker, Bradford, Union	47 min
Jul 5, 3:43 PM EDT	Severe Thunderstorm Warning	JAX	Nassau	47 min
Jul 5, 3:45 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Marion	45 min
Jul 5, 3:59 PM EDT	Special Weather Statement	JAX	Duval	46 min
Jul 5, 4:11 PM EDT	Special Marine Warning	JAX		94 min
Jul 5, 4:11 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Duval, Nassau	34 min
Jul 5, 4:16 PM EDT	Special Weather Statement	JAX	Putnam	44 min
Jul 5, 4:25 PM EDT	Severe Thunderstorm Warning	JAX	Marion, Putnam	35 min
Jul 5, 4:33 PM EDT	Special Weather Statement	JAX	Duval, Nassau	42 min
Jul 5, 4:36 PM EDT	Special Weather Statement	JAX	Flagler	24 min
Jul 5, 4:44 PM EDT	Special Marine Warning	JAX		2 hr
Jul 5, 4:45 PM EDT	Special Weather Statement	JAX	Saint Johns	45 min
Jul 5, 4:52 PM EDT	Special Weather Statement	JAX	Putnam	38 min
Jul 5, 5:06 PM EDT	Special Marine Warning	JAX		114 min
Jul 5, 5:14 PM EDT	Special Weather Statement	JAX	Saint Johns	31 min
Jul 5, 5:48 PM EDT	Special Marine Warning	JAX		87 min
Jul 5, 2:20 PM EDT	Special Weather Statement	JAX	Appling, Bacon	40 min
Jul 5, 2:30 PM EDT	Special Weather Statement	JAX	Pierce, Wayne	45 min
Jul 5, 2:49 PM EDT	Special Weather Statement	JAX	Clinch, Ware	41 min
Jul 5, 3:08 PM EDT	Special Weather Statement	JAX	Charlton	37 min
Jul 5, 3:26 PM EDT	Severe Thunderstorm Warning	JAX	Camden	34 min
Jul 5, 4:14 PM EDT	Severe Thunderstorm Warning	JAX	Camden, Glynn	46 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.