Alert archive / Illinois / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 36, NWS Lincoln, IL

May 14, 1991Bureau County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at May 14, 1991, 3:00 PM CDT for Bureau County, Illinois. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
May 14, 1991, 3:00 PM CDT (20:00 UTC)
Expired
May 14, 1991, 4:00 PM CDT
In force
60 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County Bureau County, IL

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.0 hours before the alert went out and 361 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, Green Bay/Straub, WI at 12:00Z on 1991-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Green Bay/Straub, WI at 12:00Z on 1991-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2865 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
18 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, May 14, 9:01 AM CDT, 5 hours 59 minutes before
ILZ005>007-009-141500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEORIA IL
900 AM CDT TUE MAY 14 1991

...SCATTERED THUNDERSTORMS CONTINUE ACROSS WEST AND CENTRAL ILLINOIS...

AT 8:57 THIS MORNING... RADAR INDICATED A STRONG THUNDERSTORM PRODUCING
SOME VERY HEAVY RAINFALL IN EASTERN FULTON COUNTY NEAR HAVANA. THE STORM
HAS WEAKENED SOMEWHAT DURING THE PAST HOUR BUT IS STILL CAPABLE OF
PRODUCING GUSTY WINDS AND SMALL HAIL ALONG WITH THE HEAVY RAIN.

THE STORM WAS MOVING NORTHEAST AT 15 MPH AND WILL MOVE UP ALONG THE ILLINOIS
RIVER IN THE GENERAL DIRECTION OF PEORIA.  IF THE STORM HOLDS TOGETHER IT
MAY BE EXPECTED TO REACH THE SOUTHERN SECTIONS OF PEORIA BY ABOUT 10:30 AM.

OTHER THUNDERSTORMS WERE OUT IN WESTERN ILLINOIS NEAR QUINCY. THOSE THUNDER-
STORMS WERE ALSO MOVING SLOWLY NORTHEAST TO HANCOCK AND SCHUYLER COUNTIES.

JACOBS
Special weather statement, May 14, 1:35 PM CDT, 1 hour 25 minutes before
ILZ005>007-009-141930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEORIA IL
135 PM CDT TUE MAY 14 1991

...SEVERE THUNDERSTORM WATCH NUMBER 330 IS IN EFFECT UNTIL 6 PM FOR
   EAST CENTRAL ILLINOIS... INCLUDING MCLEAN COUNTY...

AT 1:30 THIS AFTERNOON RADAR INDICATED SHOWERS OVER THE EASTERN HALF
OF MCLEAN COUNTY... MOVING EAST AT 15 MPH.

ELSEWHERE... A NEW THUNDERSTORM WAS DEVELOPING OVER KNOX COUNTY ABOUT
10 MILES EAST OF GALESBURG.
E
A COUPLE OF SHOWERS HAD ALSO DEVELOPED IN WESTERN PEORIA COUNTY BETWEEN
BRIMFIELD AND PEORIA.

MOVEMENT HAD NOT YET BEEN DETERMINED ON THESE NEW SHOWERS AND THUNDERSTORMS
BUT THEY ARE PROBABLY MOVING EAST AT 15 TO 20 MPH.
JACOBS
Special weather statement, May 14, 2:33 PM CDT, 27 minutes before
ILZ005>007-009-142030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEORIA IL
230 PM CDT TUE MAY 14 1991

...STRONG THUNDERSTORMS IN WESTERN ILLINOIS...

STRONG THUNDERSTORMS WITH HEAVY RAIN...AND POSSIBLY SOME HAIL AND BRIEF
GUSTY WINDS...WERE NEAR ALTONA...20 MILES NORTHEAST OF GALESBURG AT 225 PM.
THE THUNDERSTORMS WERE DRIFTING SLOWLY TO THE NORTH AROUND 15 MPH. HEAVY
RAIN ASSOCIATED WITH THESE STORMS MAY RESULT IN PONDING OF WATER OR MINOR
FLOODING IN LOW LYING AREAS. THE THUNDERSTORMS ARE EXPECTED TO MOVE NORTH
OF KNOX COUNTY BY 300 PM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR EAST CENTRAL ILLINOIS
INCLUDING MCLEAN COUNTY UNTIL 600 PM. THERE HAVE BEEN NO RECENT REPORTS
OF SEVERE WEATHER FROM MCLEAN COUNTY. WEATHER SERVICE RADAR AT 225 PM
INDICATED AN AREA OF SHOWERS AND THUNDERSTORMS IN EASTERN MCLEAN COUNTY
ABOUT 20 MILES EAST OF BLOOMINGTON. THE SHOWERS AND STORMS WERE MOVING
EAST AROUND 15 MPH.              ~                                MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
May 14, 10:38 AM CDTTornado WarningILXTazewell67 min
May 14, 11:12 AM CDTTornado WarningILXDeWitt, Macon63 min
May 14, 11:14 AM CDTTornado WarningILXMcLean61 min
May 14, 12:15 PM CDTTornado WarningILXMcLean35 min
May 14, 12:16 PM CDTSevere Thunderstorm WarningILXLogan, Macon59 min
May 14, 12:33 PM CDTSevere Thunderstorm WarningILXChampaign57 min
May 14, 1:20 PM CDTTornado WarningILXColes, Douglas, Moultrie25 min
May 14, 2:00 PM CDTTornado WarningILXColes, Douglas, Edgar45 min
May 14, 2:48 PM CDTTornado WarningILXClark27 min
May 14, 4:46 PM CDTSevere Thunderstorm WarningILXMacoupin, Montgomery, Sangamon44 min
May 14, 5:53 PM CDTSevere Thunderstorm WarningILXMacoupin, Montgomery52 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1991Every severe thunderstorm warning in 1991

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.