Alert archive / Illinois / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 109, NWS Paducah, KY
NWS Paducah, KY issued this severe thunderstorm warning at Jun 6, 1997, 6:46 PM CDT for Franklin County, Illinois. It was in force for 44 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
- Jun 6, 1997, 6:46 PM CDT (23:46 UTC)
- Expired
- Jun 6, 1997, 7:30 PM CDT
- In force
- 44 min
- Issued by
- NWS Paducah, KY
- Area
- Whole counties
County Franklin County, IL
The radar
The Paducah radar (KPAH), 104 km from the middle of the area, began a volume at 23:47 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 |
|---|---|---|---|
| Jun 6, 6:50 PM CDT | Hail 0.75 | Royalton, IL |
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
Lincoln, IL (KILX), launched 12:00Z, 11.8 hours before the alert went out and 242 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
- 413 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 780 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 54 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 Paducah, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 6, 12:19 PM CDT, 6 hours 27 minutes earlier.
Area forecast discussion, Jun 6, 12:19 PM CDT, 6 hours 27 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PADUCAH KY 115 PM CDT FRI JUN 6 1997 LITTLE CHANGE TO UPPER PATTERN IN NEAR TERM SIGHT AS NEW MODEL RUNS CONTINUE TO MAINTAIN MEAN LONG WAVE TROF OVER ERN 1/3 NATION...THUS KEEPING PADUCAH FA IN COOLER/WETTER THAN NORMAL REGIME. 12Z ANALYSES REVEALED NOSE OF UPPER SPEED MAX PUNCHING INTO IA...PROGGED TO ROTATE ITS WAY SOUTH INTO BASE OF LOW TODAY/TONIGHT...CONTINUING TO KICK ENERGY THRU PADUCAH FA OVER TIME. AMPLE MOISTURE SUPPLY LINGERS W/MRH FIELD OF 70% PLUS WRAPPING INTO MOST OF FA THRU 48 HRS. AS A RESULT...PCPN WL LIKELY CONT IN INTERVALS...BUT WITH FAIRLY HIGH PROBABILITY OF OCCURRENCE OVER TIME. CURRENT STRATEGY OF TAPERING FROM HIGHEST POPS EAST TO LOWEST POPS WEST IS WAY TO GO...WITH BETTER UPPER LEVEL ENERGY AND MID LEVEL COOL POOL NECESSITATING MENTION OF THUNDER AS WELL. PERSISTENCE STRATEGY CONTS TO WORK WELL WITH TEMPS. < DH
The office that day
Everything else NWS Paducah, KY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 4:00 PM CDT | Flash Flood Warning | PAH | Franklin | 2 hr |
| Jun 6, 5:30 PM CDT | Flash Flood Warning | PAH | Wayne | 2 hr |
Nearby
Severe Thunderstorm Warnings in Illinois, 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.