Alert archive / Illinois / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 21, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Apr 18, 1996, 6:22 PM CDT for Cass County, Morgan County, Scott County, Illinois. It was in force for 23 min. 4 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
- Apr 18, 1996, 6:22 PM CDT (23:22 UTC)
- Expired
- Apr 18, 1996, 6:45 PM CDT
- In force
- 23 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties Cass County, IL, Morgan County, IL, Scott County, IL
The radar
The Lincoln radar (KILX), 93 km from the middle of the area, began a volume at 23:25 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 |
|---|---|---|---|
| Apr 18, 6:30 PM CDT | Hail 0.75 | Bluffs, IL | |
| Apr 18, 6:30 PM CDT | Hail 1.75 | Arenzville, IL | |
| Apr 18, 6:35 PM CDT | Hail 1 | Jacksonville, IL | |
| Apr 18, 6:50 PM CDT | Hail 1.75 | Virginia, 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, 11.4 hours before the alert went out and 151 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1393 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSPI 182325 SVRSPI ILC017-137-171-182345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LINCOLN IL 622 PM CDT THU APR 18 1996 THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 645 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL ILLINOIS ...CASS COUNTY...WESTERN MORGAN COUNTY IN WEST CENTRAL ILLINOIS ...NORTHERN SCOTT COUNTY AT 620 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR NAPLES IN SCOTT COUNTY...60 MILES WEST OF SPRINGFIELD. THIS STORM IS MOVING EAST AT 35 MPH. THE STORMS WILL MOVE THROUGH MEREDOSIA BY 625 PM...CONCORD AROUND 630 PM...AND VIRGINIA BY 640 PM. THIS STORM PRODUCED GOLFBALL SIZE HAIL AS IT MOVED THROUGH SCHUYLER COUNTY. LARGE HAIL IS STILL LIKELY WITH THIS STORM. MOVE TO A REINFORCED SHELTER AND STAY AWAY FROM WINDOWS! $$ GEELHART &
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 5:42 PM CDT | Severe Thunderstorm Warning | ILX | Schuyler | 33 min |
| Apr 18, 6:12 PM CDT | Severe Thunderstorm Warning | ILX | Schuyler | 33 min |
| Apr 18, 6:26 PM CDT | Tornado Warning | ILX | Fulton | 49 min |
| Apr 18, 6:43 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Mason, Menard | 62 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1996Every severe thunderstorm warning in 1996
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.