Alert archive / Illinois / Tornado Warnings in 1998
Tornado Warning 24, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 13, 1998, 6:43 PM CDT for Clinton County, Washington County, Illinois. It was in force for 62 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 13, 1998, 6:43 PM CDT (23:43 UTC)
- Expired
- Apr 13, 1998, 7:45 PM CDT
- In force
- 62 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Clinton County, IL, Washington County, IL
The radar
The St Louis radar (KLSX), 113 km from the middle of the area, began a volume at 23:42 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, 7:35 PM CDT | Hail 0.88 | Okawville, IL | A severe storm spotter reported nickel size hail. |
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 |
| Apr 13, 6:30 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.7 hours before the alert went out and 199 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.
004 WFUS1 KSTL 132344 TORSTL ILC027-189-140045- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 643 PM CDT MON APR 13 1998 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 745 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH CENTRAL ILLINOIS ...CLINTON COUNTY...WASHINGTON COUNTY AT 644 PM...RADAR INDICATED A POSSIBLE TORNADO JUST SOUTH OF MASCOUTAH MOVING EAST AT 30 MPH. TOWNS IN THE PATH OF THIS STORM INCLUDE NEW MEMPHIS...OKAWVILLE...GERMANTOWN AND POSEY. SEEK SHELTER NOW IN A BASEMENT OR AN INTERIOR ROOM. YOUR LIFE AND THE LIVES OF THOSE AROUND YOU MAY DEPEND ON YOUR ACTIONS.
What forecasters said that day
The local office's own words before this tornado 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, Apr 13, 4:20 PM CDT, 2 hours 23 minutes before
MOZ026-027-034>036-041-042-047>052-059-060-062-132315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 420 PM CDT MON APR 13 1998 SEVERE THUNDERSTORM WATCH NUMBER 203 VALID UNTIL 500 PM HAS BEEN CANCELLED AND REPLACED BY TORNADO WATCH NUMBER 205 VALID UNTIL 900 PM. THE SEVERE THUNDERSTORM WATCH IS CANCELLED AND REPLACED BY A TORNADO WATCH FOR THE FOLLOWING COUNTIES: SHELBY MARION MONROE RALLS PIKE AUDRAIN BOONE CALLAWAY MONTGOMERY WARREN LINCOLN MONITEAU COLE OSAGE GASCONADE FRANKIN SEVERE THUNDERSTORMS ARE OCCURRING IN THE WATCH AREA AT THIS TIME. STAY TUNED TO YOUR RADIO OR TELEVISION OR NOAA WEATHER RADIO FOR THE LATEST ADVISORIES AND STATEMENTS. WDB
Special weather statement, Apr 13, 4:20 PM CDT, 2 hours 23 minutes before
MOZ026-027-034>036-041-042-047>052-059-060-062-132315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 420 PM CDT MON APR 13 1998 SEVERE THUNDERSTORM WATCH NUMBER 203 VALID UNTIL 500 PM HAS BEEN CANCELLED AND REPLACED BY TORNADO WATCH NUMBER 205 VALID UNTIL 900 PM. THE SEVERE THUNDERSTORM WATCH IS CANCELLED AND REPLACED BY A TORNADO WATCH FOR THE FOLLOWING COUNTIES: SHELBY MARION MONROE RALLS PIKE AUDRAIN BOONE CALLAWAY MONTGOMERY WARREN LINCOLN MONITEAU COLE OSAGE GASCONADE FRANKIN SEVERE THUNDERSTORMS ARE OCCURRING IN THE WATCH AREA AT THIS TIME. STAY TUNED TO YOUR RADIO OR TELEVISION OR NOAA WEATHER RADIO FOR THE LATEST ADVISORIES AND STATEMENTS. WDB
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, 6:12 PM CDT | Tornado Warning | LSX | Monroe, Saint Clair | 63 min |
| Apr 13, 6:25 PM CDT | Tornado Warning | LSX | Bond | 65 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.