Alert archive / Florida / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 189, NWS Tallahassee, FL

August 30, 20134 counties in Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Aug 30, 2013, 9:25 PM EDT for 4 counties in Florida. It was in force for 50 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 30, 2013, 9:25 PM EDT (01:25 UTC)
Expired: Aug 30, 2013, 10:15 PM EDT
In force: 50 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Franklin County, FL, Leon County, FL, Liberty County, FL, Wakulla County, FL

The radar

The Tallahassee radar (KTLH), 36 km from the middle of the area, began a volume at 01:27 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, 1.4 hours before the alert went out and 38 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: 2133 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1215 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Aug 30, 9:15 PM EDT, 10 minutes earlier.

Area forecast discussion, Aug 30, 9:15 PM EDT, 10 minutes before

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In the hours before

Local storm report, Aug 30, 8:13 PM EDT, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
813 PM EDT FRI AUG 30 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0720 PM     TSTM WND DMG     1 S DAMASCUS            31.28N 84.72W
08/30/2013                   EARLY              GA   LAW ENFORCEMENT

            TREES DOWN NEAR HWY 45.

0730 PM     TSTM WND DMG     4 SSW DAMASCUS          31.24N 84.74W
08/30/2013                   MILLER             GA   LAW ENFORCEMENT

            ONE TREE DOWN NEAR NORTH EARLY COUNTY LINE RD.

&&

WOOL/LAHR

Local storm report, Aug 30, 8:21 PM EDT, 1 hour 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
821 PM EDT FRI AUG 30 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0745 PM     TSTM WND DMG     COLQUITT                31.17N 84.73W
08/30/2013                   MILLER             GA   LAW ENFORCEMENT

            NUMEROUS TREES AND POWER LINES DOWN ACROSS THE COUNTY,
            INCLUDING THE CITY OF COLQUITT.

&&

WOOL/LAHR

Local storm report, Aug 30, 8:49 PM EDT, 36 minutes before

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Special weather statement, Aug 30, 8:53 PM EDT, 32 minutes before

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Local storm report, Aug 30, 9:08 PM EDT, 17 minutes before

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Local storm report, Aug 30, 9:15 PM EDT, 10 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
Aug 30, 8:10 PM EDT	Special Weather Statement	TAE	Jefferson	50 min
Aug 30, 8:16 PM EDT	Flash Flood Warning	TAE	Wakulla	2 hr
Aug 30, 8:22 PM EDT	Severe Thunderstorm Warning	TAE	Jefferson, Leon	38 min
Aug 30, 8:50 PM EDT	Severe Thunderstorm Warning	TAE	Leon, Wakulla	40 min
Aug 30, 9:02 PM EDT	Special Marine Warning	TAE		58 min
Aug 30, 9:22 PM EDT	Special Marine Warning	TAE		53 min
Aug 30, 9:28 PM EDT	Areal Flood Advisory	TAE	Leon, Wakulla	2 hr
Aug 30, 9:44 PM EDT	Special Marine Warning	TAE		106 min
Aug 30, 10:07 PM EDT	Special Marine Warning	TAE		83 min
Aug 30, 10:29 PM EDT	Special Weather Statement	TAE	Bay	61 min
Aug 30, 10:34 PM EDT	Special Marine Warning	TAE		116 min
Aug 30, 11:12 PM EDT	Special Marine Warning	TAE		2 hr
Aug 31, 12:06 AM EDT	Special Marine Warning	TAE		114 min
Aug 31, 1:25 AM EDT	Special Weather Statement	TAE	Holmes	65 min
Aug 31, 6:24 AM EDT	Dense Fog Advisory	TAE	Gadsden, Jefferson, Leon, Wakulla	3 hr
Aug 31, 1:59 PM EDT	Special Weather Statement	TAE	Bay	31 min
Aug 31, 2:01 PM EDT	Special Marine Warning	TAE		59 min
Aug 30, 8:53 PM EDT	Special Weather Statement	TAE	Clay	67 min
Aug 30, 9:05 PM EDT	Severe Thunderstorm Warning	TAE	Clay, Early	40 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.