Alert archive / Illinois / Tornado Warnings in 1998

Tornado Warning 25, NWS St. Louis, MO

April 13, 1998Randolph County, Illinois

NWS St. Louis, MO issued this tornado warning at Apr 13, 1998, 6:52 PM CDT for Randolph County, Illinois. It was in force for 68 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 13, 1998, 6:52 PM CDT (23:52 UTC)
Expired
Apr 13, 1998, 8:00 PM CDT
In force
68 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Randolph County, IL

The radar

The St Louis radar (KLSX), 104 km from the middle of the area, began a volume at 23:54 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

TimeReportWhereRemark
Apr 13, 7:10 PM CDTHail 0.75Prairie Du Rocher, IL
Apr 13, 7:15 PM CDTHail 0.75Ruma, IL
Apr 13, 7:46 PM CDTHail 0.75Steeleville, IL
Apr 13, 7:53 PM CDTHail 1Steeleville, 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.

IssuedProductOfficeLasted
Apr 13, 1:45 PM CDTTornado WatchSPC6 hr
Apr 13, 6:30 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.9 hours before the alert went out and 256 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.

Skew-T log-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 1998-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 1998-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 337 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

017 
WFUS1 KSTL 132352
TORSTL
ILC157-140100-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
652 PM CDT MON APR 13 1998
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  800 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST ILLINOIS
 
   ...NORTHERN RANDOLPH COUNTY
 
AT 650 PM...RADAR INDICATED A POSSIBLE TORNADO JUST SOUTHWEST OF RENAULT
MOVING EAST AT 30 MPH.
 
THE TOWNS OF RUMA...HOUSTON...PRAIRIE...PRAIRIE DE ROCHER...AND
SPARTA ARE IN THE PATH OF THE STORM.
 
 
IF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IN A BASEMENT
OR INTERIOR ROOM ON THE LOWEST LEVEL.

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 13, 3:20 PM CDTSevere Thunderstorm WarningLSXAdams, Brown40 min
Apr 13, 3:44 PM CDTSevere Thunderstorm WarningLSXPike46 min
Apr 13, 4:57 PM CDTTornado WarningLSXCalhoun48 min
Apr 13, 5:18 PM CDTTornado WarningLSXJersey, Macoupin42 min
Apr 13, 5:36 PM CDTTornado WarningLSXMadison54 min
Apr 13, 5:42 PM CDTTornado WarningLSXRandolph63 min
Apr 13, 6:04 PM CDTTornado WarningLSXMadison41 min
Apr 13, 6:12 PM CDTTornado WarningLSXMonroe, Saint Clair63 min
Apr 13, 6:25 PM CDTTornado WarningLSXBond65 min
Apr 13, 6:43 PM CDTTornado WarningLSXClinton, Washington62 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.