Alert archive / Illinois / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 108, NWS St. Louis, MO

July 11, 1993Fayette County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 11, 1993, 4:49 PM CDT for Fayette County, Illinois. It was in force for 41 min.

The area

The counties it named.

The facts

Issued: Jul 11, 1993, 4:49 PM CDT (21:49 UTC)
Expired: Jul 11, 1993, 5:30 PM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Whole counties

County Fayette County, IL

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 12:00Z, 9.8 hours before the alert went out and 216 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: 1481 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 811 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 38 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

Local storm report, Jul 11, 3:57 PM CDT, 52 minutes before

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Local storm report, Jul 11, 3:58 PM CDT, 51 minutes before

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Special weather statement, Jul 11, 4:00 PM CDT, 49 minutes before

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Special weather statement, Jul 11, 4:03 PM CDT, 46 minutes before

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Special weather statement, Jul 11, 4:37 PM CDT, 12 minutes before

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Special weather statement, Jul 11, 4:40 PM CDT, 9 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 7:30 PM CDT	Flash Flood Warning	LSX	Saint Charles	6 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 1993 Every severe thunderstorm warning in 1993

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.