Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 265, NWS Jacksonville, FL

July 6, 1998Alachua County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 6, 1998, 5:31 PM EDT for Alachua County, Florida. It was in force for 64 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: Jul 6, 1998, 5:31 PM EDT (21:31 UTC)
Expired: Jul 6, 1998, 6:35 PM EDT
In force: 64 min
Issued by: NWS Jacksonville, FL
Area: Whole counties

County Alachua County, FL

What was reported inside it

Time	Report	Where	Remark
Jul 6, 5:45 PM EDT	Thunderstorm Wind	Santa Fe, FL	Large trees and power lines were blown down.

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

Tampa Bay, FL (KTBW), launched 12:00Z, 9.5 hours before the alert went out and 219 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: 2608 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 714 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 5 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 Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 6, 3:00 PM EDT, 2 hours 31 minutes earlier.

Area forecast discussion, Jul 6, 3:00 PM EDT, 2 hours 31 minutes before

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In the hours before

Special weather statement, Jul 6, 11:40 AM EDT, 5 hours 51 minutes before

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Special weather statement, Jul 6, 11:40 AM EDT, 5 hours 51 minutes before

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Local storm report, Jul 6, 4:35 PM EDT, 56 minutes before

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Local storm report, Jul 6, 4:35 PM EDT, 56 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, 8:19 PM EDT	Severe Thunderstorm Warning	JAX	Marion, Putnam	46 min
Jul 6, 1:30 PM EDT	Severe Thunderstorm Warning	JAX	Marion	60 min
Jul 6, 2:20 PM EDT	Severe Thunderstorm Warning	JAX	Flagler	60 min
Jul 6, 3:47 PM EDT	Severe Thunderstorm Warning	JAX	Putnam	93 min
Jul 5, 11:07 PM EDT	Severe Thunderstorm Warning	JAX	Camden	63 min
Jul 5, 11:49 PM EDT	Tornado Warning	JAX	Camden	31 min

Nearby

Severe Thunderstorm Warnings in Florida, 1998 Every severe thunderstorm warning in 1998

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.