Alert archive / Florida / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 61, NWS Tallahassee, FL

June 4, 1999Wakulla County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jun 4, 1999, 5:15 PM EDT for Wakulla County, Florida. It was in force for 30 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 4, 1999, 5:15 PM EDT (21:15 UTC)
Expired: Jun 4, 1999, 5:45 PM EDT
In force: 30 min
Issued by: NWS Tallahassee, FL
Area: Whole counties

County Wakulla County, FL

The radar

The Tallahassee radar (KTLH), 28 km from the middle of the area, began a volume at 21:18 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.

What was reported inside it

Time	Report	Where	Remark
Jun 4, 5:48 PM EDT	Thunderstorm Wind	Northeast Portion, FL	Numerous downed trees and power lines near Wakulla Springs reported by the Wakulla County EMA.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 9.3 hours before the alert went out and 207 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: 718 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1296 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jun 4, 4:23 PM EDT, 52 minutes earlier.

Area forecast discussion, Jun 4, 4:23 PM EDT, 52 minutes before

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In the hours before

Special weather statement, Jun 4, 11:40 AM EDT, 5 hours 35 minutes before

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Special weather statement, Jun 4, 11:40 AM EDT, 5 hours 35 minutes before

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Special weather statement, Jun 4, 12:55 PM EDT, 4 hours 20 minutes before

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Special weather statement, Jun 4, 12:55 PM EDT, 4 hours 20 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
Jun 3, 8:07 PM EDT	Severe Thunderstorm Warning	TAE	Madison	23 min
Jun 4, 6:07 PM EDT	Severe Thunderstorm Warning	TAE	Wakulla	33 min
Jun 4, 6:12 PM EDT	Severe Thunderstorm Warning	TAE	Franklin	48 min
Jun 4, 6:59 PM EDT	Severe Thunderstorm Warning	TAE	Franklin, Liberty	61 min
Jun 4, 5:14 AM EDT	Severe Thunderstorm Warning	TAE	Thomas	61 min
Jun 4, 5:08 PM EDT	Severe Thunderstorm Warning	TAE	Grady	32 min
Jun 4, 5:14 PM EDT	Severe Thunderstorm Warning	TAE	Thomas	61 min
Jun 4, 7:26 PM EDT	Severe Thunderstorm Warning	TAE	Decatur	64 min

Nearby

Severe Thunderstorm Warnings in Florida, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.