Alert archive / Florida / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 148, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 17, 1997, 3:44 PM EDT for Alachua County, Florida. It was in force for 61 min. 2 reports 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 17, 1997, 3:44 PM EDT (19:44 UTC)
- Expired
- Jul 17, 1997, 4:45 PM EDT
- In force
- 61 min
- Issued by
- NWS Jacksonville, FL
- Area
- Whole counties
County Alachua County, FL
The radar
The Jacksonville radar (KJAX), 110 km from the middle of the area, began a volume at 19:45 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 |
|---|---|---|---|
| Jul 17, 4:00 PM EDT | Hail 0.75 | Gainesville North, FL | |
| Jul 17, 4:20 PM EDT | Hail 2.75 | Newmans Lake, FL |
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
Jacksonville, FL (KJAX), launched 12:00Z, 7.7 hours before the alert went out and 111 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.
- Mixed-layer CAPE
- 2083 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 653 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 17, 2:30 PM EDT, 1 hour 14 minutes earlier.
Area forecast discussion, Jul 17, 2:30 PM EDT, 1 hour 14 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 230 PM EDT THU JUL 17 1997 LOOKING AT THE LATEST 88-D THIS AFTN... SHWR AND TSTM ACTVTY CONTS TO BE WIDELY SCATTERED AROUND SFC RDG ADAP EXTENDING FM THE ATLC CSTL WATERS ACRS N CNTRL FL WITH AN AREA OF CONVERGENCE EXTENDING FM E OF TBW NORTHWARD INTO ALACHUA CO AND ACRS THE STATE TO DUVAL AND NASSAU COS. LOOKING AT THE LATEST MDL RUN... LTL IN THE WAY OF UPR LVL STRUCTURE DRIVING ANYTHING IN ANY DIRECTION. ALTHOUGH MESO-ETA AND ETA TENDING TO BUILD SFC HI OVR CNTRL FL BY THE END OF THE FCST PD WITH SOME WEAKNESS EXTENDING FM AL INTO THE MID-ATLC STATES. SHORT TERM....PRESISTANCE LOOKS TO BE AS GOOD AS ANY MDL FOR THIS AREA. THEREFORE... TNGHT LOOKS TO BE A CARBON COPY WITH SCTD SHWR ACTVTY TAPERING OFF AND TEMPS FALLING ALG FWC GUIDANCE. LATEST SOUNDIUNG THIS MRNG HAS LTL IN THE WAY OF PRECIP WATER WITH VALUES OVR N FL IN THE 1.5 INCH TO 1.6 INCH RANGE. HEAT INDEX... RUNNING AROUND THE CENTURY MARK AND SHLD HOLD THRU EARLY EVE HOURS. PRELIM... SSI BB 074/090 074/090 07231 JAX BB 072/093 072/093 07231 GNV BB 070/092 070/092 07331 K. KUYPER
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 3:57 PM EDT | Severe Thunderstorm Warning | JAX | Baker | 63 min |
| Jul 17, 5:49 PM EDT | Severe Thunderstorm Warning | JAX | Suwannee | 56 min |
| Jul 17, 6:25 PM EDT | Severe Thunderstorm Warning | JAX | Wayne | 50 min |
| Jul 17, 7:56 PM EDT | Severe Thunderstorm Warning | JAX | Brantley, Ware | 49 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1997Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.