Alert archive / Florida / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 146, NWS Tallahassee, FL

July 12, 2013Liberty County, Wakulla County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 12, 2013, 9:49 PM EDT for Liberty County, Wakulla County, Florida. It was in force for 41 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 12, 2013, 9:49 PM EDT (01:49 UTC)
Expired: Jul 12, 2013, 10:30 PM EDT
In force: 41 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Liberty County, FL, Wakulla County, FL

The radar

The Tallahassee radar (KTLH), 37 km from the middle of the area, began a volume at 01:52 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 00:00Z, 1.8 hours before the alert went out and 39 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: 1782 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 655 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 83 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 Tallahassee, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 12, 2:43 PM EDT, 7 hours 6 minutes earlier.

Area forecast discussion, Jul 12, 2:43 PM EDT, 7 hours 6 minutes before

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In the hours before

Special weather statement, Jul 12, 6:59 PM EDT, 2 hours 50 minutes before

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Special weather statement, Jul 12, 8:07 PM EDT, 1 hour 42 minutes before

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Local storm report, Jul 12, 8:13 PM EDT, 1 hour 36 minutes before

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Local storm report, Jul 12, 8:18 PM EDT, 1 hour 31 minutes before

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Special weather statement, Jul 12, 8:27 PM EDT, 1 hour 22 minutes before

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Special weather statement, Jul 12, 9:43 PM EDT, 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 8:27 PM EDT	Special Weather Statement	TAE	Gadsden	33 min
Jul 12, 9:43 PM EDT	Special Weather Statement	TAE	Wakulla	32 min
Jul 12, 10:02 PM EDT	Special Weather Statement	TAE	Walton	28 min
Jul 12, 10:45 PM EDT	Special Weather Statement	TAE	Walton	30 min
Jul 13, 6:47 AM EDT	Areal Flood Advisory	TAE	Dixie, Lafayette, Taylor	118 min
Jul 13, 8:46 AM EDT	Areal Flood Warning	TAE	Dixie, Lafayette, Taylor	119 min
Jul 13, 1:41 PM EDT	Areal Flood Advisory	TAE	Walton	2 hr
Jul 13, 3:57 PM EDT	Flash Flood Warning	TAE	Walton	63 min
Jul 13, 5:00 PM EDT	Areal Flood Advisory	TAE	Bay, Walton, Washington	3 hr
Jul 12, 8:07 PM EDT	Special Weather Statement	TAE	Brooks, Grady, Thomas	38 min
Jul 12, 8:46 PM EDT	Areal Flood Advisory	TAE	Early, Miller	119 min
Jul 13, 3:32 AM EDT	Areal Flood Advisory	TAE	Worth	88 min
Jul 13, 6:59 PM EDT	Special Weather Statement	TAE	Coffee	61 min

Nearby

Severe Thunderstorm Warnings in Florida, 2013 Every severe thunderstorm warning in 2013

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.