Alert archive / Illinois / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 8, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 7, 1986, 6:11 PM CST for Perry County, Illinois. It was in force for 19 min.
The area
The counties it named.
The facts
- Issued
- Apr 7, 1986, 6:11 PM CST (00:11 UTC)
- Expired
- Apr 7, 1986, 6:30 PM CST
- In force
- 19 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Perry 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
Salem-Leckrone, IL (KSLO), launched 00:00Z, 0.2 hours before the alert went out and 75 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
- 18 J/kg
- Mixed-layer CIN
- -250 J/kg
- Mixed-layer LCL
- 1960 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 080011 SVRSTL ILC145-080030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SAINT LOUIS MO 611 PM CST MON APR 7 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 630 PM CST FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTH CENTRAL ILLINOIS...SOUTHWEST PERRY AT 605 PM CST RADAR INDICATED A SEVERE THUNDERSTORM ON THE PERRY.. RANDOLPH COUNTY LINE NEAR PERCY ILLINOIS..ABOUT 25 MILES NORTHWEST OF MURPHYSBORO. THE STORM WAS MOVING TO THE SOUTHEAST AT 30 MPH AND IS LIKELY TO PRODUCE LARGE HAIL AND STRONG WINDS OVER SOUTHWEST PERRY COUNTY BY 630 PM. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY OR ITHE NATIONAL WEATHER SERVICE AT /314/922-9120.
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, Apr 7, 2:53 PM CST, 3 hours 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 253 PM CST MON MAR 10 1986 ...STRONG THUNDERSTORMS IN THE ST. LOUIS METROPOLITAN AREA... AT 245 PM..RADAR SHOWED A LINE OF VERY STRONG THUNDERSTORMS FROM THE ST. LOUIS METROPOLITAN AREA..EXTENDING NORTHEAST INTO CENTRAL ILLINOIS. ONE VERY STRONG STORM WAS NEAR ALTON ILLINOIS. IT DROPPED MARBLE SIZE HAIL NEAR BRIGHTON AND ALTON ILLINOIS..ABOUT 25 MILES NORTH OF ST. LOUIS BETWEEN 230 AND 245 PM. ANOTHER STORM DROPPED SMALL HAIL AT THE WEATHER SERVICE FORECAST OFFICE AT ST. PETERS MISSOURI..JUST WEST OF ST. LOUIS BETWEEN 230 AND 245 PM. THE STORMS WERE MOVING TO THE EAST SOUTHEAST AT 25 MPH. MCCARTHY
Special weather statement, Apr 7, 4:23 PM CST, 1 hour 48 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 420 PM CST MON APR 7 1986 ...A TORNADO WATCH IS IN EFFECT FOR THE WEST HALF OF CENTRAL MISSOURI UNTIL 1100PM CST....A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE EAST HALF OF CENTRAL MISSOURI UNTIL 900PM CST... AT 415PM CST COLUMBIAS RADAR SHOWED SCATTERED THUNDERSHOWERS...SOME WITH HEAVY SHOWERS...IN A LINE ABOUT 15 MILES WIDE EXTENDING FROM KANSAS CITY TO POMME DE TERRE RESERVOIR..OR ABOUT 30 MILES NORTH OF SPRINGFIELD. THE STRONGEST THUNDERSTORM WAS ABOUT 10 MILES IN DIAMETER AND CENTERED 35 MILES NORTH OF SPRINGFIELD. THE THUNDERSTORMS HAVE BEEN DEVELOPING RAPIDLY SINCE 4PM CST AND WERE MOVING TO THE SOUTHEAST AROUND :40 MILES AN HOUR. NO SEVERE WEATHER WAS REPORTED OR INDICATED BY RADAR IN CENTRAL MISSOURI DURING THE LAST HOUR.
Special weather statement, Apr 7, 5:54 PM CST, 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 600 PM CST MON APR 7 1986 ...TORNADO WATCH FOR WEST CENTRAL MISSOURI UNTIL 1100 PM... ...SEVERE THUNDERSTORM WATCH FOR EAST CENTRAL MISSOURI UNTIL 900 PM... AT 545 PM CST VERY STRONG THUNDERSTORMS WERE MOVING ACROSS WEST AND SOUTH CENTRAL MISSOURI. THE THUNDERSTORMS WERE IN A 20 MILE WIDE AREA FROM 25 MILES SOUTH OF WAYNESVILLE TO 30 MILES WEST OF SEDALIA. THE STRONGEST THUNDERSTORMS WERE IN A 5 MILE WIDE BAND FROM 20 MILES SOUTHWEST OF SEDALIA TO CAMDENTON. THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN ...DANGEROUS LIGHTNING..AND THE POSSIBILITY OF SMALL HAIL AS THEY MOVE TO THE SOUTHEAST AT 40 MILES AN HOUR. BE P8REPARED TO MOVE TO A SAFE PLACE IF SEVERE WEATHER IS SPOTTED...AND REPORT ANY SEVERE WEATHER TO THE NEAREAST LAW ENFORCEMENT AGENCY TO RELAY TO THE NATIONAL WEATHER SERVICE. LA GREE
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.