Alert archive / Florida / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 181, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Aug 29, 1997, 4:39 PM EDT for Putnam County, Florida. It was in force for 36 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
- Aug 29, 1997, 4:39 PM EDT (20:39 UTC)
- Expired
- Aug 29, 1997, 5:15 PM EDT
- In force
- 36 min
- Issued by
- NWS Jacksonville, FL
- Area
- Whole counties
County Putnam County, FL
The radar
The Jacksonville radar (KJAX), 97 km from the middle of the area, began a volume at 20:40 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 nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 8.7 hours before the alert went out and 99 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
- 1873 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 1027 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 28 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 Aug 29, 2:44 PM EDT, 1 hour 55 minutes earlier.
Area forecast discussion, Aug 29, 2:44 PM EDT, 1 hour 55 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 240 PM EDT FRI AUG 29 1997 SFC ADAP STREAMLINE ANALYSIS SHOWING TROUGH ACROSS CNTL AND SW GA AND RIDGE ACROSS S CTNL PENINSULA. AREA OF CONVERGENCE BETWEEN BOTH FEATURES RESULTING IN SCT TSRA ACROSS AREAS INLAND FROM GULF MVG EAST. EXPECT BULK OF ACTVY IN N FL FROM W OF JAX TO GNV AND LIVE OAK. SEABREEZE HAS DEVELOPED AT SSI BUT APPEARS ECSB IN NE FL WILL BE LATE TO DEVELOP...BUT IF IT DOES...COULD BE FEW STG STMS NEAR COAST EARLY THIS EVE. EXPECT MOST STMS TO BE OVER BY 00Z. ON SAT...NO REAL CHANGES FORESEEN WITH NW FLOW ALOFT AND SFC RIDGE STRETCHING FROM ATLANTIC TO CTNL FL AND INTO GULF. GRADIANT WEAK AND EXPECT SCT TSRA 4TO DEVELOP MAINLY FROM SEABREEZES MID TO LATE AFT. PRELIM SSI BB 074/090 073/089 08121 JAX BB 073/093 072/092 08131 GNV BB 072/092 071/092 08131 PETERSON
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 3:26 PM EDT | Severe Thunderstorm Warning | JAX | Alachua | 49 min |
| Aug 29, 3:35 PM EDT | Tornado Warning | JAX | Alachua | 25 min |
| Aug 29, 3:50 PM EDT | Severe Thunderstorm Warning | JAX | Putnam | 40 min |
| Aug 29, 4:57 PM EDT | Severe Thunderstorm Warning | JAX | Flagler, Saint Johns | 48 min |
| Aug 29, 6:11 PM EDT | Severe Thunderstorm Warning | JAX | Appling | 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.