Alert archive / Illinois / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 19, NWS Lincoln, IL

April 19, 2002Cass County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 19, 2002, 7:25 PM CDT for Cass County, Illinois. It was in force for 50 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 19, 2002, 7:25 PM CDT (00:25 UTC)
Expired
Apr 19, 2002, 8:15 PM CDT
In force
50 min
Issued by
NWS Lincoln, IL
Area
Counties, with a storm outline in the text

County Cass County, IL

What was reported inside it

TimeReportWhereRemark
Apr 19, 7:27 PM CDTTornado F1Bluff Spgs, ILA tornado briefly touched down 3.5 miles east southeast of Bluff Springs near Illinois Route 125. It was on the ground for about 2 miles, moving east northeast. Thirty to forty large trees were either broken off or uprooted. Also, a grain bin and three barn

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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.4 hours before the alert went out and 143 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 00:00Z on 2002-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 49 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2002-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 square meters per square second.1939587897117136Sfc1 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
49 J/kg
Mixed-layer CIN
-173 J/kg
Mixed-layer LCL
1566 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 19, 7:03 PM CDTSevere Thunderstorm WarningILXChampaign, Douglas42 min
Apr 19, 7:19 PM CDTTornado WarningILXChampaign56 min
Apr 19, 7:25 PM CDTSevere Thunderstorm WarningILXMacon65 min
Apr 19, 7:29 PM CDTSevere Thunderstorm WarningILXPiatt46 min
Apr 19, 7:54 PM CDTSevere Thunderstorm WarningILXMenard, Sangamon66 min
Apr 19, 7:55 PM CDTFlash Flood WarningILXChampaign, Douglas6 hr
Apr 19, 8:05 PM CDTSevere Thunderstorm WarningILXChampaign, Douglas55 min
Apr 19, 8:37 PM CDTFlash Flood WarningILXVermilion5 hr
Apr 19, 8:43 PM CDTSevere Thunderstorm WarningILXChristian62 min
Apr 19, 8:45 PM CDTFlash Flood WarningILXPiatt5 hr
Apr 19, 8:46 PM CDTFlash Flood WarningILXPiatt, Sangamon5 hr
Apr 19, 8:47 PM CDTFlash Flood WarningILXPiatt5 hr
Apr 19, 8:49 PM CDTFlash Flood WarningILXSangamon5 hr
Apr 19, 8:53 PM CDTSevere Thunderstorm WarningILXLogan, Macon, Sangamon52 min
Apr 19, 9:00 PM CDTFlash Flood WarningILXChristian, Macon5 hr
Apr 19, 9:31 PM CDTFlash Flood WarningILXDeWitt, Logan4 hr
Apr 20, 2:09 AM CDTFlash Flood WarningILXChampaign, Douglas6 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2002Every severe thunderstorm warning in 2002

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.