Alert archive / Illinois / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 13, NWS St. Louis, MO

April 3, 1989Monroe County, Saint Clair County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 3, 1989, 2:19 PM CDT for Monroe County, Saint Clair County, Illinois. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Apr 3, 1989, 2:19 PM CDT (19:19 UTC)
Expired: Apr 3, 1989, 3:00 PM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Whole counties

Counties Monroe County, IL, Saint Clair County, IL

The radar

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

What was reported inside it

Time	Report	Where	Remark
Apr 3, 2:40 PM CDT	Hail 0.75	St. Clair, IL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 12:00Z, 7.3 hours before the alert went out and 188 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: 55 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 556 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSTL 031919
SVRSTL
ILC133-163-032000-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
219 PM CDT MON APR 3 1989
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  300 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTHWEST ILLINOIS
          ...MONROE...ST CLAIR
 
AT 210 PM...RADAR INDICATED A SEVERE THUNDERSTORM JUST NORTH OF
CRYSTAL CITYp...OR ABOUT 20 MILES SOUTH OF ST LOUIS. THIS STORM
WILL MOVE THROUGH ST CLAIR AND MONROE COUNTIES OF SOUTHWEST
ILLINOIS AND PRODUCE LARGE HAIL...STRONG WIND...INTENSE LIGHTNING
AND VERY HEAVY RAIN.  THE STORMS WILL BE MOVING AT 40 MPH.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 1:18 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	42 min
Apr 3, 1:35 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	25 min
Apr 3, 3:17 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Washington	43 min
Apr 3, 3:55 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	35 min
Apr 3, 4:57 PM CDT	Severe Thunderstorm Warning	LSX	Perry	33 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1989 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.