Alert archive / Illinois / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 32, NWS Lincoln, IL

April 27, 1989Cass County, Menard County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 27, 1989, 10:29 PM CDT for Cass County, Menard County, Illinois. It was in force for 61 min.

The area

The counties it named.

The facts

Issued
Apr 27, 1989, 10:29 PM CDT (03:29 UTC)
Expired
Apr 27, 1989, 11:30 PM CDT
In force
61 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Cass County, IL, Menard County, IL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Peoria Regional, IL (KPIA), launched 00:00Z, 3.5 hours before the alert went out and 83 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, Peoria Regional, IL at 00:00Z on 1989-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1692 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, Peoria Regional, IL at 00:00Z on 1989-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.193958Sfc1 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
1692 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1202 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 8:47 PM CDTSevere Thunderstorm WarningILXFulton, McDonough43 min
Apr 27, 9:31 PM CDTSevere Thunderstorm WarningILXFulton44 min
Apr 27, 10:03 PM CDTSevere Thunderstorm WarningILXMason57 min
Apr 28, 12:33 AM CDTSevere Thunderstorm WarningILXChristian, Sangamon57 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1989Every severe thunderstorm warning in 1989

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.