Alert archive / Illinois / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 37, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 12, 1986, 1:22 PM CDT for Perry County, Randolph County, Illinois. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Jul 12, 1986, 1:22 PM CDT (18:22 UTC)
- Expired
- Jul 12, 1986, 2:22 PM CDT
- In force
- 60 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Perry County, IL, Randolph County, IL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Peoria Regional, IL (KPIA), launched 12:00Z, 6.4 hours before the alert went out and 289 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.
- Mixed-layer CAPE
- 1465 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 566 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 121824 SVRSTL ILC157-145-121915- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 122 PM CDT SAT JUL 12 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 222 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHERN ILLINOIS EASTERN RANDOLPH PERRY AT 122 PM CDT A SEVERE THUNDERSTORM WAS INDICATED BY RADAR JUST NORTH OF CHESTER ILLINOIS. THIS STORM WAS MOVING TO THE EAST AT 40 MPH AND SHOULD REACH THE DU QUOIN AREA BY 215 THIS AFTERNOON. < REMEMBER A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH..LARGE HAIL..DEADLY LIGHTNING..AND HEAVY RAIN THAT CAN QUICKLY FLOOD L)OW LYING AREAS. PLEASE REPORT ANY SEVERE WEATHER TO YOUR NEAREST LAW ENFORCEMENT AGENCY OR THE NATIONAL WEATHER SERVICE. JOKERST
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 12, 1:07 PM CDT, 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 110 PM CDT SAT JUL 12 1986 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF SOUTHEAST MISSOURI AND PORTIONS OF SOUTHERN ILLINOIS UNTIL 7 PM THIS SATURDAY AFTERNOON... AT 110 PM CDT..INTENSE THUNDERSTORMS..SOME WITH HEAVY RAIN.. WERE LOCATED FROM NEAR NEW ATHENS ILLINOIS SOUTH TO CHESTER ILLINOIS THEN WEST TO NEAR ROLLA MISSOURI. THIS AREA WAS ABOUT 50 MILES SOUTHEAST AND AND SOUTH OF ST LOUIS MO. THESE THUNDERSTORMS WERE MOVING FROM THE WEST AT 35 TO 40 MPH. STRONG GUSTY WIND..SMALL HAIL AND VERY HEAVY RAIN WILL ACCOMPANY THESE THUNDERSTORMS AS THEY MOVE THROUGH SOUTHERN ILLINOIS AND SOUTHEAST MISSOURI THIS AFTERNOON.
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 7:05 PM CDT | Flash Flood Warning | LSX | Perry | 4 hr |
Nearby
Severe Thunderstorm Warnings in Illinois, 1986Every severe thunderstorm warning in 1986
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.