Alert archive / Illinois / Tornado Warnings in 1998
Tornado Warning 20, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 13, 1998, 6:12 PM CDT for Monroe County, Saint Clair County, Illinois. It was in force for 63 min. 3 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 13, 1998, 6:12 PM CDT (23:12 UTC)
- Expired
- Apr 13, 1998, 7:15 PM CDT
- In force
- 63 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Monroe County, IL, Saint Clair County, IL
The radar
The St Louis radar (KLSX), 66 km from the middle of the area, began a volume at 23:12 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 13, 6:25 PM CDT | Hail 1 | Millstadt, IL | 1 inch hail was reported in Millstadt. |
| Apr 13, 6:35 PM CDT | Hail 0.75 | Belleville, IL | |
| Apr 13, 6:35 PM CDT | Hail 0.75 | Freeburg, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 13, 3:45 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.2 hours before the alert went out and 234 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
- 1703 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 337 m²/s²
- 0-3 km storm-relative helicity
- 313 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
883 WFUS1 KSTL 132313 RRA TORSTL ILC133-163-140015- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 612 PM CDT MON APR 13 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 715 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST ILLINOIS ...MONROE COUNTY...ST. CLAIR COUNTY AT 613 PM...RADAR INDICATED A POSSIBLE TORNADO 8 MILES WEST OF COLUMBIA MOVING EAST AT 30 MPH. TOWNS IN THE PATH OF THE STORM ARE COLUMBIA...DUPO...MILLSTADT AND BELLEVILLE. THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY AND SEEK SHELTER NOW FG/DFL
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 3:20 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown | 40 min |
| Apr 13, 3:44 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 46 min |
| Apr 13, 4:57 PM CDT | Tornado Warning | LSX | Calhoun | 48 min |
| Apr 13, 5:18 PM CDT | Tornado Warning | LSX | Jersey, Macoupin | 42 min |
| Apr 13, 5:36 PM CDT | Tornado Warning | LSX | Madison | 54 min |
| Apr 13, 5:42 PM CDT | Tornado Warning | LSX | Randolph | 63 min |
| Apr 13, 6:04 PM CDT | Tornado Warning | LSX | Madison | 41 min |
| Apr 13, 6:25 PM CDT | Tornado Warning | LSX | Bond | 65 min |
| Apr 13, 6:43 PM CDT | Tornado Warning | LSX | Clinton, Washington | 62 min |
| Apr 13, 6:52 PM CDT | Tornado Warning | LSX | Randolph | 68 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.