Alert archive / Illinois / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 42, NWS Lincoln, IL

June 20, 1994Cass County, Menard County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 20, 1994, 7:46 PM CDT for Cass County, Menard County, Illinois. It was in force for 29 min.

The area

The counties it named.

The facts

Issued: Jun 20, 1994, 7:46 PM CDT (00:46 UTC)
Expired: Jun 20, 1994, 8:15 PM CDT
In force: 29 min
Issued by: NWS Lincoln, IL
Area: Whole counties

Counties Cass County, IL, Menard County, IL

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 0.8 hours before the alert went out and 494 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3367 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1431 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

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, Jun 20, 5:28 PM CDT, 2 hours 18 minutes before

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Special weather statement, Jun 20, 5:30 PM CDT, 2 hours 16 minutes before

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Special weather statement, Jun 20, 5:34 PM CDT, 2 hours 12 minutes before

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Special weather statement, Jun 20, 6:24 PM CDT, 1 hour 22 minutes before

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Special weather statement, Jun 20, 6:28 PM CDT, 1 hour 18 minutes before

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Special weather statement, Jun 20, 6:30 PM CDT, 1 hour 16 minutes before

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Nearby

Severe Thunderstorm Warnings in Illinois, 1994 Every severe thunderstorm warning in 1994

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.