Alert archive / Indiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 113, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jul 18, 1997, 4:27 PM CDT for Jasper County, Newton County, Porter County, Indiana. It was in force for 63 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 18, 1997, 4:27 PM CDT (21:27 UTC)
- Expired
- Jul 18, 1997, 5:30 PM CDT
- In force
- 63 min
- Issued by
- NWS Chicago, IL
- Area
- Whole counties
Counties Jasper County, IN, Newton County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 89 km from the middle of the area, began a volume at 21:30 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 18, 4:40 PM CDT | Thunderstorm Wind 50 | Countywide, IN | |
| Jul 18, 4:40 PM CDT | Thunderstorm Wind 50 | Countywide, IN | Severe thunderstorms downed tree limbs and power lines in Lake, Porter and Newton counties. Windows were broke in a house in Porter county. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 18, 1:45 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.5 hours before the alert went out and 163 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
- 2335 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 952 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCHI 182124 RRA SVRCHI INC073-111-127-182230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHICAGO IL 427 PM CDT FRI JUL 18 1997 THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHWEST INDIANA ...JASPER COUNTY...NEWTON COUNTY...SOUTHERN PORTER COUNTY AT 423 PM A LINE OF SEVERE THUNDERSTORMS EXTENDED FROM JUST SOUTH OF GARY TO JUST NORTH OF KANKAKEE. THE STORMS WERE MOVING SOUTHEAST AT 40 MPH. NUMEROUS REPORTS OF DAMAGING WINDS HAVE BEEN REPORTED WITH THIS LINE OF SEVERE STORMS. DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS!
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, Jul 18, 10:57 AM CDT, 5 hours 30 minutes before
ILZ003>006-008-010>014-019>023-032>033-039-INZ001>005-010>016-019>020- 191100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO IL 1100 AM CDT FRI JUL 19 1997 FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND NORTHWEST AND NORTH CENTRAL INDIANA THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN NORTH CENTRAL AND NORTHEAST ILLINOIS AND A SMALL PART OF NORTHWEST INDIANA THIS AFTERNOON AND TONIGHT. NO SEVERE STORMS ARE EXPECTED IN NORTH CENTRAL INDIANA. AFTERNOON TEMPERATURES OF 85 TO 90 COMBINED WITH DEWPOINT TEMPERATURES IN THE LOWER TO MIDDLE 70S WILL CREATE A VERY WARM...HUMID...UNSTABLE ATMOSPHERE OVER NORTHERN ILLINOIS AND INDIANA. A COLD FRONT PUSHING SOUTH FROM WISCONSIN AND MICHIGAN WILL REACH NORTHERN ILLINOIS AND INDIANA TOWARD EVENING. THIS WILL BE THE FOCUS OF THUNDERSTORM ACTIVITY. A STRONG JET STREAM ACROSS THE NORTHERN GREAT LAKES WILL ENHANCE THE THUNDERSTORM DEVELOPMENT. A COMPLEX OF STRONG THUNDERSTORMS WAS OVER SOUTHEAST MINNESOTA LATE THIS MORNING. IT IS EXPECTED TO CONTINUE TO PROPOGATE EAST SOUTHEAST TOWARD NORTHWEST AND NORTH CENTRAL ILLINOIS THIS AFTERNOON. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHWEST AND NORTH CENTRAL ILLINOIS UNTILr 400 PM. ALLSOPP
Special weather statement, Jul 18, 3:55 PM CDT, 32 minutes before
ILZ003-004-008-010-011-182115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 355 PM CDT FRI JUL 18 1997 ...THE SEVERE THUNDERSTORM WATCH FOR NORTH CENTRAL ILLINOIS HAS EXPIRED... THE SEVERE THUNDERSTORM WATCH IS NO LONGER IN EFFECT FOR WINNEBAGO...BOONE...OGLE...LEE AND DEKALB COUNTIES. ALLSOPP
Special weather statement, Jul 18, 4:14 PM CDT, 13 minutes before
ILZ005-006-012>014-019>023-INZ001-002-010-011-182145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 415 PM CDT FRI JUL 18 1997 ...THE SEVERE THUNDERSTORM WATCH IS NO LONGER IN EFFECT NORTHWEST OF A LINE FROM CHICAGO TO MORRIS... THE SEVERE THUNDERSTORM WATCH IS NO LONGER IN EFFECT FOR MCHENRY... LAKE...DUPAGE...KANE...KENDALL OR LASALLE COUNTIES. ALLSOPP
Special weather statement, Jul 18, 4:15 PM CDT, 12 minutes before
ILZ005-006-012>014-019>023-INZ001-002-010-011-182145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 415 PM CDT FRI JUL 18 1997 ...THE SEVERE THUNDERSTORM WATCH IS NO LONGER IN EFFECT NORTHWEST OF A LINE FROM CHICAGO TO MORRIS... THE SEVERE THUNDERSTORM WATCH IS NO LONGER IN EFFECT FOR MCHENRY... LAKE...DUPAGE...KANE...KENDALL OR LASALLE COUNTIES. ALLSOPP
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 1:12 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 63 min |
| Jul 18, 2:19 PM CDT | Flash Flood Warning | LOT | Lake | 41 min |
| Jul 18, 2:19 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 41 min |
| Jul 18, 3:01 PM CDT | Severe Thunderstorm Warning | LOT | Fulton, Kosciusko, Marshall | 59 min |
| Jul 18, 3:07 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 68 min |
| Jul 18, 4:07 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 68 min |
| Jul 18, 4:47 PM CDT | Severe Thunderstorm Warning | LOT | Benton | 58 min |
| Jul 18, 4:58 PM CDT | Severe Thunderstorm Warning | LOT | Pulaski, White | 62 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.