Alert archive / Illinois / Tornado Warnings in 1998
Tornado Warning 3, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 7, 1998, 4:44 PM CDT for Macoupin County, Illinois. It was in force for 46 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
- Apr 7, 1998, 4:44 PM CDT (21:44 UTC)
- Expired
- Apr 7, 1998, 5:30 PM CDT
- In force
- 46 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Macoupin County, IL
The radar
The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 21:47 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 |
|---|---|---|---|
| Apr 7, 5:00 PM CDT | Hail 0.75 | Girard, IL | The local newspaper reported 3/4 inch hail fell in Girard. |
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 |
|---|---|---|---|
| Apr 7, 4:15 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.7 hours before the alert went out and 150 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
- 1568 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
807 WFUS1 KSTL 072145 RRA TORSTL ILC117-072230- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 444 PM CDT TUE APR 7 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 530 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL ILLINOIS ...NORTHEASTERN MACOUPIN COUNTY AT 444 PM...RADAR DETECTED A TORNADO 5 MILES WEST OF CARLINVILLE. IT WAS MOVING TO THE NORTHEAST AT 35 MPH. TOWNS IN THE PATH ARE NILWOOD...STANDARD CITY AND GIRARD. THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY AND SEEK SHELTER NOW GKS/DM
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 3:55 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 35 min |
| Apr 7, 4:05 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 25 min |
| Apr 7, 4:34 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin | 41 min |
| Apr 7, 4:50 PM CDT | Severe Thunderstorm Warning | LSX | Brown | 40 min |
| Apr 7, 5:08 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 37 min |
Nearby
Tornado Warnings in Illinois, 1998Every tornado warning in 1998Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.