Alert archive / Illinois / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 22, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Apr 15, 1998, 8:32 PM CDT for McLean County, Illinois. It was in force for 43 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
- Apr 15, 1998, 8:32 PM CDT (01:32 UTC)
- Expired
- Apr 15, 1998, 9:15 PM CDT
- In force
- 43 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
County McLean County, IL
The radar
The Lincoln radar (KILX), 56 km from the middle of the area, began a volume at 01:32 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 15, 3:15 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 1.5 hours before the alert went out and 43 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
- 426 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 919 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSPI 160133 RRA SVRSPI ILC113-160215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LINCOLN IL 832 PM CDT WED APR 15 1998 THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR EASTERN MCLEAN COUNTY IN CENTRAL ILLINOIS * UNTIL 915 PM CDT * AT 830 PM CDT LINCOLN DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES EAST OF BLOOMINGTON/NORMAL...MOVING NORTHEAST AT 30 MPH. * THIS STORM IS EXPECTED TO AFFECT AREAS AROUND... SAYBROOK ARROWSMITH LARGE HAIL CAN BE EXPECTED WITH THIS STORM. GET INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS. REMEMBER...SEVERE THUNDERSTORMS MAY PRODUCE TORNADOES AT ANY TIME.| KETCHAM
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 Lincoln, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 15, 1:50 PM CDT, 6 hours 42 minutes earlier.
Area forecast discussion, Apr 15, 1:50 PM CDT, 6 hours 42 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LINCOLN IL 150 PM CDT WED APR 15 1998 MAIN CONCERN FOR THIS AFTERNOON AND TONIGHT IS DEVELOPING SVR WX SITN ACRS CENT AND SRN IL. NEED A BOUNDARY??? WE/VE GOT PLENTY OF THEM AND 17Z SFC ANALYSIS SHOWS BOUNDARY OVER SRN MO/IL BEGINNING TO MOV TO THE N WITH DEWPTS INCREASING. AGREE WITH SPC ON PLACING HIGH RISK A LITTLE FURTHER TO THE S...HOWEVER...WE STILL REMAIN IN MODERATE RISK. NEW 18Z SOUNDING... SLIGHTLY MODIFIED WITH CAPES OVER 1600 J/KG AND LI/S AROUND MINUS 7. AS FOR WHEN TRW ACTIVITY SHOULD DEVELOP...CAN EXPECT IT AT ANY TIME NOW. ACTIVITY WILL CONT INTO THE EVENING HOURS...WITH IT GRADUALLY TAPERING OFF TO RWS AND LIGHT RAIN. AS FOR LOW TEMPS...50S STILL LOOKS GOOD. WILL SEND WORK ZONES IN NEXT HALF HOUR...NEED TO KEEP SEVERE WORDING IN FOR THIS EVENING. PIA 53/59 ++ SPI 54/59 ++ DEC 56/60 ++ CMI 56/60 ++ LWV 60/67 ++ BYRD
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 8:22 PM CDT | Tornado Warning | ILX | Clay | 53 min |
| Apr 15, 8:45 PM CDT | Tornado Warning | ILX | Jasper, Richland | 60 min |
| Apr 15, 8:53 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Knox | 52 min |
| Apr 15, 9:24 PM CDT | Tornado Warning | ILX | Crawford | 51 min |
| Apr 15, 9:45 PM CDT | Severe Thunderstorm Warning | ILX | Knox | 45 min |
| Apr 15, 10:00 PM CDT | Severe Thunderstorm Warning | ILX | Stark | 60 min |
| Apr 15, 11:20 PM CDT | Severe Thunderstorm Warning | ILX | Mason, Tazewell | 55 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1998Every severe thunderstorm warning in 1998
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.