Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 103, NWS Jacksonville, FL

July 4, 1997Bradford County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 4, 1997, 3:03 PM EDT for Bradford County, Florida. It was in force for 57 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 4, 1997, 3:03 PM EDT (19:03 UTC)
Expired: Jul 4, 1997, 4:00 PM EDT
In force: 57 min
Issued by: NWS Jacksonville, FL
Area: Whole counties

County Bradford County, FL

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.1 hours before the alert went out and 211 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: 3604 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 990 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 20 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 4, 2:42 PM EDT, 21 minutes earlier.

Area forecast discussion, Jul 4, 2:42 PM EDT, 21 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 4, 1:31 PM EDT	Severe Thunderstorm Warning	JAX	Marion	59 min
Jul 4, 3:30 PM EDT	Severe Thunderstorm Warning	JAX	Duval	60 min
Jul 4, 3:46 PM EDT	Severe Thunderstorm Warning	JAX	Alachua	44 min
Jul 4, 4:01 PM EDT	Severe Thunderstorm Warning	JAX	Alachua	59 min
Jul 4, 4:05 PM EDT	Severe Thunderstorm Warning	JAX	Clay	55 min
Jul 4, 5:11 PM EDT	Severe Thunderstorm Warning	JAX	Marion, Putnam	64 min

Nearby

Severe Thunderstorm Warnings in Florida, 1997 Every severe thunderstorm warning in 1997

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.