Alert archive / Georgia / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 17, NWS Jacksonville, FL

April 23, 1997Ware County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 23, 1997, 3:20 AM EDT for Ware County, Georgia. It was in force for 40 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: Apr 23, 1997, 3:20 AM EDT (07:20 UTC)
Expired: Apr 23, 1997, 4:00 AM EDT
In force: 40 min
Issued by: NWS Jacksonville, FL
Area: Whole counties

County Ware County, GA

The radar

The Moody AFB radar (KVAX), 58 km from the middle of the area, began a volume at 07:23 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 22, 11:00 PM EDT	Tornado Watch	SPC	5 hr
Apr 23, 3:00 AM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 7.3 hours before the alert went out and 93 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: 814 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1303 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

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 Apr 23, 2:10 AM EDT, 1 hour 10 minutes earlier.

Area forecast discussion, Apr 23, 2:10 AM EDT, 1 hour 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
210 AM EDT WED APR 23 1997

LTST SFC ANAL SHOWS LOW ACROSS N GA WITH SECONDARY LOW ACROSS SOUTHERN AL
WITH FNT XTNDG ACROSS N GA...CNTRL AL...AND SE MS. SAT LOOPS SHOW
SUBTROPICAL JET ACROSS GULF WITH POLAR JET DIGGING INTO SE. ACCOMPANYING
THESE WE HAVE TWO JET STREAKS COMBINING WITH INCREASED DIFF VORT AVECTION
ACROSS ATMOSPHERIC COLUMN...AND DRY AIR INTRUSION AT MID LVLS...TO CREATE
THREAT OF SVR WX. ETA SEEMS TO HAVE A GUD HNDL OF SITUATION SO WILL STICK
WITH IT. AT THIS TIME IT SEEMS TO ME THAT MAIN THREAT OF SVR WX WILL CONT
FOR GA THRU THE LATE MORNING HOURS WITH THREAT OF SVR WX MOVG INTO FL AFTER
SUNRISE. LOOKING AT HELICITY VALUES IN NAWIPS AND SNDGS ACROSS THE AREA
FROM 00Z I BELIEVE THAT MAIN THREAT WITH STORMS WILL BE LARGE HAIL...
DUE TO DRY AIR INTRUSION ALOFT WITH WET BULBS RANGING BETWEEN 9000/10000...
ACROSS BOTH SE GA AND FL WITH THREAT OF TORNADIC ACTIVITY GREATEST NORTH
OF CWA.

SSI TU 081/054 075/055 18600
JAX TU 082/053 076/051 18700
GNV TU 082/052 077/050 18700

SANTOS

In the hours before

Special weather statement, Apr 22, 11:28 PM EDT, 3 hours 52 minutes before

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Special weather statement, Apr 22, 11:29 PM EDT, 3 hours 51 minutes before

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Special weather statement, Apr 23, 3:05 AM EDT, 15 minutes before

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Special weather statement, Apr 23, 3:10 AM EDT, 10 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
Apr 23, 4:59 AM EDT	Tornado Warning	JAX	Nassau	31 min
Apr 23, 5:29 AM EDT	Severe Thunderstorm Warning	JAX	Duval	61 min
Apr 23, 7:29 AM EDT	Severe Thunderstorm Warning	JAX	Clay	31 min
Apr 23, 7:38 AM EDT	Severe Thunderstorm Warning	JAX	Columbia, Suwannee	37 min
Apr 23, 7:46 AM EDT	Severe Thunderstorm Warning	JAX	Saint Johns	44 min
Apr 23, 7:57 AM EDT	Tornado Warning	JAX	Clay, Putnam	33 min
Apr 23, 8:13 AM EDT	Tornado Warning	JAX	Alachua	47 min
Apr 23, 8:31 AM EDT	Tornado Warning	JAX	Bradford, Clay	59 min
Apr 23, 8:43 AM EDT	Flash Flood Warning	JAX	Alachua	4 hr
Apr 23, 9:41 AM EDT	Severe Thunderstorm Warning	JAX	Flagler	49 min
Apr 23, 9:56 AM EDT	Tornado Warning	JAX	Marion	64 min
Apr 23, 10:08 AM EDT	Flash Flood Warning	JAX	Putnam	4 hr
Apr 23, 10:31 AM EDT	Severe Thunderstorm Warning	JAX	Flagler	29 min
Apr 23, 11:39 AM EDT	Severe Thunderstorm Warning	JAX	Alachua	36 min
Apr 23, 11:50 AM EDT	Severe Thunderstorm Warning	JAX	Clay	40 min
Apr 23, 12:26 AM EDT	Severe Thunderstorm Warning	JAX	Coffee, Jeff Davis	49 min
Apr 23, 3:39 AM EDT	Severe Thunderstorm Warning	JAX	Wayne	51 min

Nearby

Severe Thunderstorm Warnings in Georgia, 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; radar from the NEXRAD Level II archive.