Alert archive / Florida / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 167, NWS Jacksonville, FL

June 24, 2015Clay County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 24, 2015, 4:59 PM EDT for Clay County, Florida. It was in force for 20 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 24, 2015, 4:59 PM EDT (20:59 UTC)
Expired: Jun 24, 2015, 5:19 PM EDT
In force: 20 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

County Clay County, FL

The radar

The Jacksonville radar (KJAX), 58 km from the middle of the area, began a volume at 21:01 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, 9.0 hours before the alert went out and 214 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: 241 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 1195 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 16 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 Jun 24, 2:50 PM EDT, 2 hours 9 minutes earlier.

Area forecast discussion, Jun 24, 2:50 PM EDT, 2 hours 9 minutes before

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Hazardous weather outlook, Jun 24, 3:35 PM EDT, 1 hour 24 minutes before

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In the hours before

Special weather statement, Jun 24, 2:53 PM EDT, 2 hours 6 minutes before

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Local storm report, Jun 24, 3:23 PM EDT, 1 hour 36 minutes before

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Special weather statement, Jun 24, 3:43 PM EDT, 1 hour 16 minutes before

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Special weather statement, Jun 24, 3:59 PM EDT, 1 hour before

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Local storm report, Jun 24, 4:23 PM EDT, 36 minutes before

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Special weather statement, Jun 24, 4:57 PM EDT, 2 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
Jun 24, 1:47 PM EDT	Special Weather Statement	JAX	Marion	28 min
Jun 24, 2:24 PM EDT	Severe Thunderstorm Warning	JAX	Marion	36 min
Jun 24, 2:53 PM EDT	Special Weather Statement	JAX	Alachua	37 min
Jun 24, 3:15 PM EDT	Severe Thunderstorm Warning	JAX	Alachua	30 min
Jun 24, 3:43 PM EDT	Special Weather Statement	JAX	Alachua, Bradford, Union	17 min
Jun 24, 3:59 PM EDT	Special Weather Statement	JAX	Alachua, Bradford, Union	31 min
Jun 24, 4:31 PM EDT	Severe Thunderstorm Warning	JAX	Bradford, Clay	29 min
Jun 24, 4:57 PM EDT	Special Weather Statement	JAX	Columbia, Union	33 min
Jun 24, 5:02 PM EDT	Severe Thunderstorm Warning	JAX	Columbia	28 min
Jun 24, 5:05 PM EDT	Special Weather Statement	JAX	Duval	25 min
Jun 24, 5:31 PM EDT	Special Weather Statement	JAX	Columbia	29 min
Jun 24, 5:57 PM EDT	Special Weather Statement	JAX	Putnam	48 min
Jun 24, 6:29 PM EDT	Severe Thunderstorm Warning	JAX	Flagler, Putnam, Saint Johns	31 min
Jun 24, 7:00 PM EDT	Special Weather Statement	JAX	Flagler, Saint Johns	30 min
Jun 24, 7:30 PM EDT	Special Weather Statement	JAX	Flagler	30 min
Jun 24, 5:53 PM EDT	Special Weather Statement	JAX	Echols	22 min
Jun 24, 6:13 PM EDT	Special Weather Statement	JAX	Clinch	17 min
Jun 24, 6:35 PM EDT	Special Weather Statement	JAX	Clinch	25 min
Jun 24, 6:39 PM EDT	Special Weather Statement	JAX	Camden	36 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.