Alert archive / Illinois / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 24, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 4, 1987, 6:45 PM CDT for Adams County, Illinois. It was in force for 25 min.
The area
The counties it named.
The facts
- Issued
- Jul 4, 1987, 6:45 PM CDT (23:45 UTC)
- Expired
- Jul 4, 1987, 7:10 PM CDT
- In force
- 25 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Adams 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, 11.8 hours before the alert went out and 154 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
- 4 J/kg
- Mixed-layer CIN
- -265 J/kg
- Mixed-layer LCL
- 1320 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 93 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 042349 SVRSTL ILC001-050010- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 645 PM CDT SAT JUL 4 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 710 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHWEST ILLINOIS...ADAMS AT 640 PM CDT A SEVERE THUNDERSTORM WAS INDICATED BY RADAR AT THE QUINCY AIRPORT. THE AIRPORT REPORTED A GUST OF 60 MPH. THE STORM WAS MOVING TO THE NORTH AROUND 30 MPH. < BE ALERT FOR DAMAGING WIND...LARGE HAIL AND FREQUENT LIGHTNING. STAY INDOORS AWAY FROM WINDOWS. AVOID USING THE TELEPHONE AND ELECTRIC APPLIANCES. BE ALERT FOR FLOODING OF STREAMS AND LOW AREAS. SCHROEDER
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 4, 1:51 PM CDT, 4 hours 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 150 PM CDT SAT JUL 4 1987 ...STRONG THUNDERSTORMS MOVING INTO COLUMBIA... AT 145 PM A LINE OF STRONG THUNDERSTORMS EXTENDED WAS NEAR THE MISSOURI RIVER FROM BOONVILLE TO JUST NORTHEAST OF JEFFERSON CITY TO 20 MILES SOUTHEAST OF JEFFERSON CITY. THE THUNDERSTORMS WERE MOVING EAST AT 35 MILES AN HOUR. A WIND GUST TO 50 MILES AN HOUR AT COLUMBIA REGIONAL AIRPORT WAS RECORDED AT 138 PM. BRIEF TORRENTIAL RAIN...SMALL HAIL AND WIND GUSTS TO 50 MILES AN HOUR WILL CONTINUE WITH THESE THUNDERSTORMS AND WILL BE IN THE COLUMBIA AREA UNTIL ABOUT 230 PM. VOTAW
Special weather statement, Jul 4, 2:00 PM CDT, 4 hours 45 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 155 PM CDT SAT JUL 4 1987 ...SEVERE THUNDERSTORM WATCH CONTINUES FOR SOUTHEAST MISSOURI... THE NATIONAL WEATHER SERVICE HAS CANCELLED THE SEVERE THUNDERSTORM WATCH FOR SOUTHEAST MISSOURI. THE THREAT OF SEVERE WEATHER HAS ENDING IN THAT AREA...ALTHOUGH A FEW THUNDERSHOWERS WILL PERSIST UNTIL AROUND 5 PM. HOWEVER...A SEVERE THUNDERSTORM WATCH CONTINUES FOR SOUTHEAST MISSOURI UNTIL 3 PM. AT 145 PM CDT THE FRONT EDGE OF AN AREA OF STRONG THUNDERSTORMS REACHED FROM NEAR EFFINGTON...ABOUT 100 MILES SOUTH SOUTHWEST OF ST. LOUIS...TO JUST SOUTH OF DONIPHAN...ABOUT 130 MILES SOUTH SOUTHWEST OF ST. LOUIS. THESE STORM WERE MOVING TO THE EAST AT 35 MPH. SJM
Special weather statement, Jul 4, 4:06 PM CDT, 2 hours 39 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 400 PM CDT SAT JUL 4 1987 ...SEVERE THUNDERSTORM WATCH FOR PART OF EAST CENTRAL AND SOUTHEAST MISSOURI...AND SOUTHWEST ILLINOIS TIL 8 PM... JUST BEFORE 4 PM CDT STRONG THUNDERSTORMS WERE SCATTERED OVER PARTS OF NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS. SOME OF THE STRONGEST OF THESE WERE ON THE MISSISSIPPI RIVER JUST SOUTH OF KEOKUK IOWA...AND FROM ALTON ILLINOIS...JUST NORTHEAST OF ST. LOUIS... TO CARROLLTON ILLINOIS AND BETWEEN SPRINGFIELD AND JACKSON ILLINOIS. THEY WERE MOVING EAST NORTHEAST AT 35 MPH AND COULD PRODUCE VERY HEAVY RAIN...STRONG WINDS AND POSSIBLY SOME HAIL. A LARGE AREA OF SHOWERS AND THUNDERSTORMS OF LESSER INTENSITY COVERED MUCH OF EAST CENTRAL AND SOUTHEAST MISSOURI...FROM JUST SOUTHWEST OF ST. LOUIS THROUGH THE EASTERN OZARKS REGION. SCATTERED STRONG THUNDERSTORMS WHICH MOVED THROUGH THE ST. LOUIS AREA BETWEEN 3 AND 4 PM HAVE PUSHED INTO ILLINOIS...FROM AROUND ALTON TO CARROLLTON AND GREENFIELD...EXTENDING FROM 20 TO 50 MILES NORTH OF ST. LOUIS. THE STORMS PRODUCED SPOTTY HEAVY RAIN IN THE ST. LOUIS AREA. WINDS REACHED 37 MPH AT SPIRIT OF ST. LOUIS AIRPORT AT 325 PM AND 31 [MPH AT LAMBERT AIRPORT AT 328 PM THIS AFTERNOON. THE ST. LOUIS DOWNTOWN AREA WAS BETWEEN RAINS JUST BEFORE 4 PM. AN AREA OF LIGHT TO MODERATE RAIN SHOULD MOVE OVER DOWNTOWN BY 430 PM AND CONTINUE FOR ABOUT AN HOUR. MCCARTHY
Special weather statement, Jul 4, 5:08 PM CDT, 1 hour 37 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 505 PM CDT SAT JUL 4 1987 ...MISSOURI AND ST. LOUIS AREA CLEARED FROM SEVERE THUNDERSTORM WATCH... EAST CENTRAL AND SOUTHEAST MISSOURI...AND THE ILLINOIS COUNTIES OF THE ST. LOUIS METROPOLITAN AREA HAVE BEEN CLEARED FROM THE SEVERE THUNDERSTORM WATCH ISSUED EARLIER THIS AFTERNOON. THE WATCH REMAINS IN EFFECT FOR PARTS OF SOUTH AND SOUTHWEST ILLINOIS UNTIL 8 PM. AT 5 PM SCATTERED VERY STRONG THUNDERSTORMS WERE NEAR SPRINGFIELD ILLINOIS...EXTENDING WEST TO THE ILLINOIS RIVER IN CENTRAL ILLINOIS. THEY WERE MOVING NORTHEAST AT 35 MPH. OTHER SHOWERS AND THUNDERSTORMS WERE SCATTERED FROM NORTHEAST MISSOURI INTO CENTRAL ILLINOIS. OTHERS WERE IN CENTRAL MISSOURI... AND OVER PARTS OF SOUTHEAST MISSOURI AND EXTREME SOUTHWEST ILLINOIS. THE SHOWERS AND THUNDERSTORMS FROM AROUND ST. LOUIS INTO SOUTHEAST MISSOURI WEAKENED CONSIDERABLY SINCE 3 PM AND THE THREAT OF SEVERE WEATHER HAS DIMINISHED. WINDS GUSTING TO 35 TO 40 MPH WERE REPORTED IN PARTS OF THE ST. LOUIS AREA BETWEEN 3 AND 4 PM...AND THERE HAVE BEEN REPORTS OF POWER OUTAGES IN NORTHWEST ST. LOUIS COUNTY...BUT THERE WERE NO REPORTS OF SEVERE WEATHER. SOME LIGHT RAIN IS POSSIBLE OVER THE ST. LOUIS DOWNTOWN AREA AT THE VP FAIR BETWEEN 5 AND 6 PM...BUT IT SHOULD NOT BE ENOUGH TO INTERRUPT ACTIVITIES. ANOTHER AREA OF SHOWERS WELL TO THE WEST COULD MOVE INTO THE DOWNTOWN AREA BETWEEN 7 AND 8 PM. * MCCARTHY
Special weather statement, Jul 4, 6:09 PM CDT, 36 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 607 PM CDT SATU JUL 4 1987 ...VERY STRONG THUNDERSTORMS AROUND QUINCY ILLINOIS... JUST AFTER 6 PM CDT...VERY STRONG THUNDERSTORMS WERE NEAR QUINCY ILLINOIS...THE STRONGEST JUST EAST OF THE AIRPORT IN EASTERN ADAMS COUNTY. THEY WERE MOVING NORTH NORTHEAST AT 35 MPH AND WILL PRODUCE EXTREMELY HEAVY RAIN...STRONG WINDS AND POSSIBLY HAIL. OTHER STRONG THUNDERSTORMS STRETCHED FROM NEAR KIRKSVILLE MISSOURI INTO CENTRAL ILLINOIS BETWEEN DECATUR AND CHAMPAIGN. SHOWERS AND THUNDERSHOWERS OF LESSER INTENSITY WERE OVER PARTS OF CENTRAL MISSOURI AND ALONG THE MISSISSIPPI RIVER BETWEEN CAPE GIRARDEAU MISSOURI AND MARION ILLINOISR. MOST OF THE SHOWERS AROUND THE ST. LOUIS METROPOLITAN AREA HAVE DISSIPATED...AT LEAST TEMPORARILY. MCCARTHY
Nearby
Severe Thunderstorm Warnings in Illinois, 1987Every severe thunderstorm warning in 1987
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.