Alert archive / Missouri / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 56, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 15, 1998, 6:24 PM CDT for Monroe County, Illinois; Jefferson County, Saint Louis County, Missouri. It was in force for 61 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 15, 1998, 6:24 PM CDT (23:24 UTC)
- Expired
- Apr 15, 1998, 7:25 PM CDT
- In force
- 61 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Monroe County, IL, Jefferson County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 43 km from the middle of the area, began a volume at 23:24 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 15, 6:35 PM CDT | Hail 0.75 | Arnold, MO | Spotters reported 3/4 inch hail. |
| Apr 15, 6:37 PM CDT | Hail 0.75 | Oakville, MO | Spotters reported 3/4 inch hail in south St. Louis County. |
| Apr 15, 7:05 PM CDT | Tornado F0 | Waterloo, 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 15, 4:30 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 15, 1:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.4 hours before the alert went out and 249 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
- 927 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 459 m²/s²
- 0-3 km storm-relative helicity
- 751 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
888
WUUS1 KSTL 152326 RRA
SVRSTL
ILC133-MOC099-189-160025-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
624 PM CDT WED APR 15 1998
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN MONROE COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS
NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI
SOUTHEASTERN ST LOUIS COUNTY IN EAST CENTRAL MISSOURI
* UNTIL 725 PM CDT
* AT 622 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM NEAR CEDAR HILL... MOVING NORTHEAST AT 25 MPH.
* LOCATIONS THAT WILL BE AFFECTED...
IN MISSOURI
OTTO
ANTONIO
IMPERIAL
KIMSWICK
BARNHART
AND IN ILLINOIS
MERAMEC
COLUMBIA
FOUNTAIN
VALMEYER
THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING HAIL. LARGE HAIL CAN
CAUSE EXTENSIVE PROPERTY DAMAGE AN SERIOUS INJURY TO PEOPLE CAUGHT
OUTDOORS. MOVE INSIDE A STURDY BUILDING IMMEDIATELY.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.
PEDIGO
&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.
In the hours before
Special weather statement, Apr 15, 2:55 PM CDT, 3 hours 29 minutes before
MOZ049-059-062-065-072>074-084-099-152155- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 255 PM CDT WED APR 15 1998 ...TORNADO WATCH NUMBER 214 REMAINS IN EFFECT UNTIL 700 PM CDT... THE TORNADO WATCH ISSUED FOR MUCH OF CENTRAL AND SOUTHERN MISSOURI REMAINS IN EFFECT. ONLY ONE WARNING IS IN EFFECT...FOR SOUTHEAST COLE AND SOUTHERN OSAGE COUNTY...HOWEVER CONDITIONS REMAIN VERY FAVORABLE FOR ADDITIONAL SEVERE WEATHER THIS AFTERNOON AND EVENING ACROSS THE AREA. THE STORM PREDICTION CENTER IN NORMAN OKLAHOMA IS FORECASTING A HIGH RISK FOR SEVERE WEATHER ACROSS A GOOD PORTION OF SOUTHERN MISSOURI THIS AFTERNOON AND TONIGHT. THOUGH THERE IS NO IMMEDIATE THREAT FOR SEVERE STORMS...THE POTENTIAL REMAINS VERY HIGH...KEEP ABREAST OF LATEST STATEMENTS FROM THE NATIONAL WEATHER SERVICE AND LISTEN FOR POSSIBLE WARNINGS LATER ON... THIS IS A POTENTIALLY DANGEROUS WEATHER SITUATION. REVIEW SEVERE WEATHER SAFETY RULES...AND LISTEN TO RADIO...TV...OR NOAA WEATHER RADIO FOR LATEST WARNINGS AND STATEMENTS. PEDIGO
Special weather statement, Apr 15, 2:55 PM CDT, 3 hours 29 minutes before
MOZ049-059-062-065-072>074-084-099-152155- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 255 PM CDT WED APR 15 1998 ...TORNADO WATCH NUMBER 214 REMAINS IN EFFECT UNTIL 700 PM CDT... THE TORNADO WATCH ISSUED FOR MUCH OF CENTRAL AND SOUTHERN MISSOURI REMAINS IN EFFECT. ONLY ONE WARNING IS IN EFFECT...FOR SOUTHEAST COLE AND SOUTHERN OSAGE COUNTY...HOWEVER CONDITIONS REMAIN VERY FAVORABLE FOR ADDITIONAL SEVERE WEATHER THIS AFTERNOON AND EVENING ACROSS THE AREA. THE STORM PREDICTION CENTER IN NORMAN OKLAHOMA IS FORECASTING A HIGH RISK FOR SEVERE WEATHER ACROSS A GOOD PORTION OF SOUTHERN MISSOURI THIS AFTERNOON AND TONIGHT. THOUGH THERE IS NO IMMEDIATE THREAT FOR SEVERE STORMS...THE POTENTIAL REMAINS VERY HIGH...KEEP ABREAST OF LATEST STATEMENTS FROM THE NATIONAL WEATHER SERVICE AND LISTEN FOR POSSIBLE WARNINGS LATER ON... THIS IS A POTENTIALLY DANGEROUS WEATHER SITUATION. REVIEW SEVERE WEATHER SAFETY RULES...AND LISTEN TO RADIO...TV...OR NOAA WEATHER RADIO FOR LATEST WARNINGS AND STATEMENTS. PEDIGO
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 5:02 PM CDT | Tornado Warning | LSX | Monroe, Randolph | 63 min |
| Apr 15, 5:24 PM CDT | Tornado Warning | LSX | Saint Clair | 66 min |
| Apr 15, 5:48 PM CDT | Tornado Warning | LSX | Randolph | 62 min |
| Apr 15, 6:01 PM CDT | Tornado Warning | LSX | Washington | 64 min |
| Apr 15, 6:56 PM CDT | Tornado Warning | LSX | Washington | 64 min |
| Apr 15, 6:58 PM CDT | Tornado Warning | LSX | Bond, Clinton, Madison | 62 min |
| Apr 15, 7:11 AM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 44 min |
| Apr 15, 2:43 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Osage | 47 min |
| Apr 15, 3:26 PM CDT | Tornado Warning | LSX | Franklin, Gasconade | 49 min |
| Apr 15, 3:52 PM CDT | Severe Thunderstorm Warning | LSX | Osage | 48 min |
| Apr 15, 4:06 PM CDT | Tornado Warning | LSX | Franklin | 49 min |
| Apr 15, 4:25 PM CDT | Tornado Warning | LSX | Jefferson | 65 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 1998Severe 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.