Alert archive / Indiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 63, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jun 20, 1997, 1:39 PM CDT for Newton County, Indiana. It was in force for 51 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 20, 1997, 1:39 PM CDT (18:39 UTC)
- Expired
- Jun 20, 1997, 2:30 PM CDT
- In force
- 51 min
- Issued by
- NWS Chicago, IL
- Area
- Whole counties
County Newton County, IN
The radar
The Chicago radar (KLOT), 92 km from the middle of the area, began a volume at 18:42 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 20, 1:39 PM CDT | Hail 0.88 | Roselawn, IN | A severe thunderstorm over Newton county produced small hail and strong winds, which resulted in downed trees. |
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, 6.7 hours before the alert went out and 136 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
- 1020 J/kg
- Mixed-layer CIN
- -141 J/kg
- Mixed-layer LCL
- 1138 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
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.
In the hours before
Special weather statement, Jun 20, 10:57 AM CDT, 2 hours 42 minutes before
ILZ003>006-008-010>014-019>023-032>033-039-INZ001>005-010>016-019>020- 211100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO IL 1100 AM CDT FRI JUN 20 1997 FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND NORTHWEST AND NORTH CENTRAL INDIANA THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE ENTIRE AREA. THE ATMOSPHERE IS QUITE UNSTABLE AND SCATTERED THUNDERSTORMS MAY DEVELOP AT ANY GIVEN TIME THIS AFTERNOON. HOWEVER...THE GREATEST LIKLIHOOD OF ORGANIZED SEVERE THUNDERSTORM ACTIVITY IS EXPECTED TO OCCUR THIS EVENING IN NORTH CENTRAL ILLINOIS...AND SPREAD EASTWARD ACROSS NORTHEAST ILLINOIS AND NORTHERN INDIANA TONIGHT. MERZLOCK
Special weather statement, Jun 20, 11:00 AM CDT, 2 hours 39 minutes before
ILZ003>006-008-010>014-019>023-032>033-039-INZ001>005-010>016-019>020- 211100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO IL 1100 AM CDT FRI JUN 20 1997 FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND NORTHWEST AND NORTH CENTRAL INDIANA THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE ENTIRE AREA. THE ATMOSPHERE IS QUITE UNSTABLE AND SCATTERED THUNDERSTORMS MAY DEVELOP AT ANY GIVEN TIME THIS AFTERNOON. HOWEVER...THE GREATEST LIKLIHOOD OF ORGANIZED SEVERE THUNDERSTORM ACTIVITY IS EXPECTED TO OCCUR THIS EVENING IN NORTH CENTRAL ILLINOIS...AND SPREAD EASTWARD ACROSS NORTHEAST ILLINOIS AND NORTHERN INDIANA TONIGHT. MERZLOCK
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 1:20 PM CDT | Flash Flood Warning | LOT | Newton | 100 min |
| Jun 20, 3:19 PM CDT | Flash Flood Warning | LOT | Newton | 116 min |
Nearby
Severe Thunderstorm Warnings in Indiana, 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.