Alert archive / Illinois / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 131, NWS Lincoln, IL

July 18, 1993Marshall County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jul 18, 1993, 3:13 PM CDT for Marshall County, Illinois. It was in force for 62 min.

The area

The counties it named.

The facts

Issued: Jul 18, 1993, 3:13 PM CDT (20:13 UTC)
Expired: Jul 18, 1993, 4:15 PM CDT
In force: 62 min
Issued by: NWS Lincoln, IL
Area: Whole counties

County Marshall County, IL

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.2 hours before the alert went out and 397 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: 16 J/kg
Mixed-layer CIN: -165 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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, Jul 18, 1:50 PM CDT, 1 hour 23 minutes before

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Special weather statement, Jul 18, 1:52 PM CDT, 1 hour 21 minutes before

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Special weather statement, Jul 18, 1:53 PM CDT, 1 hour 20 minutes before

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Special weather statement, Jul 18, 1:58 PM CDT, 1 hour 15 minutes before

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Special weather statement, Jul 18, 2:50 PM CDT, 23 minutes before

ILZ005>007-182100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEORIA IL
250 PM CDT SUN JUL 18 1993

...STRONG THUNDERSTORMS MOVING THROUGH CENTRAL ILLINOIS...

A LINE OF STRONG THUNDERSTORMS EXTENDED FROM ABOUT MENDOTA...30 MILES
WEST-NORTHWEST OF MARSEILLES...TO PEORIA AT 245 PM. THE STRONGEST
STORM WAS NEAR BRADFORD...35 MILES NORTH OF PEORIA. THESE STORMS WILL
PRODUCE VERY HEAVY RAIN...WIND GUSTS OF 40 MPH OR GREATER AND DEADLY
LIGHTNING.

THE STORMS WERE MOVING EAST-NORTHEAST AROUND 35 MPH AND ARE EXPECTED
TO BE ALONG AND JUST EAST OF THE ILLINOIS RIVER FROM LASALLE TO ABOUT
METAMORA AROUND 330 PM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PARTS OF CENTRAL
ILLINOIS UNTIL 700 PM. HEAVY RAIN IS EXPECTED WITH THE THUNDERSTORMS
THE NEXT 12 HOURS SO A FLASH FLOOD WATCH IS IN EFFECT FOR ALL OF
WESTERN AND CENTRAL ILLINOIS THIS AFTERNOON AND TONIGHT. STAY
TUNED TO NOAA WEATHER RADIO...OR LOCAL RADIO AND TV...FOR LATER
STATEMENTS AND POSSIBLE WARNINGS.

MILLER

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Special weather statement, Jul 18, 2:54 PM CDT, 19 minutes before

ILZ005>007-182100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEORIA IL
250 PM CDT SUN JUL 18 1993

...STRONG THUNDERSTORMS MOVING THROUGH CENTRAL ILLINOIS...

A LINE OF STRONG THUNDERSTORMS EXTENDED FROM ABOUT MENDOTA...30 MILES
WEST-NORTHWEST OF MARSEILLES...TO PEORIA AT 245 PM. THE STRONGEST
STORM WAS NEAR BRADFORD...35 MILES NORTH OF PEORIA. THESE STORMS WILL
PRODUCE VERY HEAVY RAIN...WIND GUSTS OF 40 MPH OR GREATER AND DEADLY
LIGHTNING.

THE STORMS WERE MOVING EAST-NORTHEAST AROUND 35 MPH AND ARE EXPECTED
TO BE ALONG AND JUST EAST OF THE ILLINOIS RIVER FROM LASALLE TO ABOUT
METAMORA AROUND 330 PM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PARTS OF CENTRAL
ILLINOIS UNTIL 700 PM. HEAVY RAIN IS EXPECTED WITH THE THUNDERSTORMS
THE NEXT 12 HOURS SO A FLASH FLOOD WATCH IS IN EFFECT FOR ALL OF
WESTERN AND CENTRAL ILLINOIS THIS AFTERNOON AND TONIGHT. STAY
TUNED TO NOAA WEATHER RADIO...OR LOCAL RADIO AND TV...FOR LATER
STATEMENTS AND POSSIBLE WARNINGS.

MILLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 10:34 PM CDT	Flash Flood Warning	ILX	Carroll	3 hr
Jul 18, 4:39 PM CDT	Severe Thunderstorm Warning	ILX	Menard	56 min
Jul 18, 4:52 PM CDT	Severe Thunderstorm Warning	ILX	Edgar	38 min
Jul 18, 5:20 PM CDT	Flash Flood Warning	ILX	DeKalb	2 hr
Jul 18, 6:32 PM CDT	Severe Thunderstorm Warning	ILX	Shelby	21 min
Jul 18, 6:32 PM CDT	Severe Thunderstorm Warning	ILX	Coles	28 min

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.