Alert archive / Illinois / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 100, NWS St. Louis, MO

June 6, 1997Randolph County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 6, 1997, 8:15 PM CDT for Randolph County, Illinois. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 6, 1997, 8:15 PM CDT (01:15 UTC)
Expired: Jun 6, 1997, 8:45 PM CDT
In force: 30 min
Issued by: NWS St. Louis, MO
Area: Whole counties

County Randolph County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.3 hours before the alert went out and 256 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: 560 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 704 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 070115 RRA
SVRSTL
ILC157-070145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
815 PM CDT FRI JUN 6 1997
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  845 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST ILLINOIS
 
   ...EASTERN RANDOLPH COUNTY
 
AT 810 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM LOCATED NEAR SPARTA ILLINOIS. THIS STORM WAS MOVING EAST
AT 15 MPH. COMMUNITIES IN THE PATH OF THE STORM INCLUDE...RURAL AREAS
ALONG AND NEAR HIGHWAY 154 TO THE EAST OF SPARTA.
 
PRIMARY THREAT FOR SEVERE WEATHER WITH THIS STORM IS HAIL.
 
 
 
THIS ISb A DANGEROUS STORM! BE PREPARED FOR DAMAGING WINDS...HAIL
AND DEADLY LIGHTNING. STAY INSIDE AND AWAY FROM WINDOWS.

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, Jun 6, 8:12 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MISSOURI
812 PM CDT FRI JUN 06 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0550 PM    PACIFIC                   MO   .5 INCH HAIL
06/06/97   FRANKLIN

0559 PM    DRAKE                     MO   .75 INCH HAIL
06/06/97   GASCONADE

0640 PM    OWENSVILLE                MO   1.75 INCH HAIL
06/06/97   GASCONADE

0706 PM    FAYETTEVILLE              IL   1 INCH HAIL
06/06/97   ST CLAIR

0715 PM    FAYETTEVILLE              IL   WIND DAMAGE
06/06/97   ST CLAIR                       TREES AND POWER LINES DOWN
                                          AND MINOR TRAILER DAMAGE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 7:12 PM CDT	Severe Thunderstorm Warning	LSX	Washington	48 min
Jun 6, 8:50 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	25 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1997 Every severe thunderstorm warning in 1997

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.