Alert archive / Illinois / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 57, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 16, 1987, 7:11 PM CDT for Adams County, Illinois. It was in force for 49 min.
The area
The counties it named.
The facts
- Issued
- Aug 16, 1987, 7:11 PM CDT (00:11 UTC)
- Expired
- Aug 16, 1987, 8:00 PM CDT
- In force
- 49 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 00:00Z, 0.2 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
- 2574 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 1422 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 185 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 6.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 170010 SVRSTL ILC001-170100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 711 PM CDT SUN AUG 16 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 800 PM CDT FOR THE FOLLOWING COUNTY OF WEST CENTRAL ILLINOIS... ADAMS AT 7PM A POTENTIALLY SEVERE THUNDERSTORM WAS LOCATED JUST TO THE WEST OF QUINCY. IT WILL MOVE INTO THE QUINCY AREA BEFORE 730PM POSSIBLY RESULTING IN DAMAGING WINDS OR LARGE HAIL. PERSONS IN QUINCY SHOULD BE PREPARED TO REACT IF CONDITIONS THREATEN. PROTECT YOURSELF FROM DAMAGING WINDS...LARGE HAIL AND LIGHTNING BY STAYING IN A BUILDING...AWAY FROM WINDOWS. DO NOT USE THE TELEPHONE OR ELECTRICAL APPLIANCES...EXCEPT IN EMERGENCIES. FELDT
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, Aug 16, 5:20 PM CDT, 1 hour 51 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 520 PM CDT SUN AUG 16 1987 ...STRONG THUNDERSTORMS DEVELOPING OVER WEST AND NORTH CENTRAL MISSOURI... STRONG THUNDERSTORMS WERE DEVELOPING IN A 10 MILE WIDE BAND FROM NEAR WARSAW IN BENTON COUNTY TO NEAR SEDALIA IN PETTIS COUNTY. STRONG THUNDERSTORMS WERE ALSO DEVELOPING FROM 10 MILES WEST OF KIRKSVILLE TO 25 MILES SOUTHWEST OF KIRKSVILLE. THE THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR AND COULD PRODUCE HAIL..STRONG GUSTY WIND HEAVY RAIN AND VERY DANGEROUS LIGHTNING. LA GREE
Special weather statement, Aug 16, 5:30 PM CDT, 1 hour 41 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 525 PM CDT SUN AUG 16 1987 AT 525 PM STRONG THUNDERSTORMS WERE DEVELOPING FROM SOUTHEAST IOWA ACROSS NORTHEAST MISSOURI INTO CENTRAL MISSOURI. THESE STRONG THUNDERSTORMS WERE ASSOCIATED WITH A COLD FRONT THAT WAS MOVING EASTWARD ACROSS MISSOURI. STRONGEST THUNDERSTORMS WERE CLUSTERED ACROSS ADAIR COUNTY. THE MISSOURI STATE POLICE REPORT SMALL HAIL AND VERY HEAVY RAIN NEAR THOUSAND HILLS STATE PARK JUST WEST OF KIRKSVILLE. SINCE THE STORMS ARE MOVING EAST NORTHEAST AT 25 MILES AN HOUR.. THEY WILL BE IN THE KIRKSVILLE AREA BETWEEN 530 AND 630PM THIS EVENING. PERSONS IN KIRKSVILLE CAN EXPECT A PERIOD OG HEAVY RAIN .. GUSTY WINDS .. FREQUENT LIGHTNING AND POSSIBLY SOME HAIL AS THE STORMS PASS. FELDT
Special weather statement, Aug 16, 6:07 PM CDT, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 610 PM CDT SUN AUG 16 1987 ...SEVERE THUNDERSTORM WARNING FOR MORGAN...EASTERN PETTIS SOUTHERN COOPER AND MONITEAU COUNTIES UNTIL 630 PM... A LINE OF SEVERE THUNDERSTORMS ABOUT 10 MILES WIDE STRETCHED FROM 25 MILES WEST OF COLUMBIA TO NEAR HERMITAGE MOVING EAST AT 30 MILES AN HOUR. WIND GUSTS TO 50 MILES AN HOUR WERE REPORTED IN WESTERN MORGAN COUNTY AT 555 PM CDT...AND PEA SIZED HAIL WAS REPORTED NEAR HERMITAGE IN BENTON COUNTY AT THE SAME TIME. LARGE HAIL AND STRONG GUSTY WIND WILL BE LIKELY WITH THESE THUNDERSTORMS...ALONG WITH HEAVY RAIN AND VERY DANGEROUS LIGHTNING. IF SEVERE WEATHER IS SPOTTED GO TO A PLACE OF SAFET/Y. LA GREE
Special weather statement, Aug 16, 6:36 PM CDT, 35 minutes before
RADAR SUMMARY AND SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 630 PM CDT SUN AUG 16 1987 ...TORNADO WATCH FOR PARTS OF EASTERN IOWA AND NORTHWEST ILLINOIS UNTIL 10PM...SEVERE THUNDERSTORM WATCH FOR MOST OF THE NORTHERN HALF OF ILLINOIS UNTIL MIDNIGHT... ...INTENSE STORMS IN CENTRAL MISSOURI... AT 625 PM CDT...SCATTERED INTENSE THUNDERSTORMS WERE OCCURRING IN PARTS OF CENTRAL TO NORTHEAST MISSOURI INTO NORTHWEST ILLINOIS. THESE STORMS HAVE A PAST HISTORY OF DAMAGING WINDS IN MORGAN COUNTY MISSOURI. THE MORE INTENSE STORMS WITH VERY HEAVY RAIN...STRONG WINDS AND POSSIBLE HAIL WERE...AROUND THE COLUMBIA MISSOURI AREA...AND 50 MILES SOUTHWEST OF COLUMBIA..._NEAR CAMDENTON MISSOURI...AND 25 MILES WEST OF QUINCY ILLINOIS...IN NORTHEAST SHELBY COUNTY MISSOURI. THESE STORMS WERE MOVING TO THE EAST AT 40 MILES AN HOUR. BB
Special weather statement, Aug 16, 6:56 PM CDT, 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 650 PM CDT SUN AUG 16 1987 ... STRONG THUNDERSTORMS APPROACHING QUINCY AREA ... ...TORNADO WATCH FOR PARTS OF EASTERN IOWA AND NORTHWEST ILLINOIS UNTIL 10PM...SEVERE THUNDERSTORM WATCH FOR MOST OF THE NORTHERN HALF OF ILLINOIS UNTIL MIDNIGHT... AT 650 PM THIS EVENING VERY STRONG THUNDERSTORMS WERE LOCATED IN LEWIS AND MARION COUNTIES OF NORTHEAST MISSOURI.. THIS WAS ALONG THE MISSISSIPPI RIVER BETWEEN KEOKUK AND QUINCY. THESE STORMS ARE HEADING EAST AT 35 MILES AN HOUR AND WILL REACH THE CITY OF LAGRANGE AND WAKONDA STATE PARK AROUND 7PM AND SHOULD MOVE ACROSS THE QUINCY AREA BETWEEN 7 AND 8PM. ALTHOUGH NO REPORTS OF SEVERE WEATHER HAVE BEEN RECEIVED WITH THESE STORMS... THEY ARE CAPABLE OF PRODUCING A PERIOD OF VERY HEAVY RAIN .. STRONG AND GUSTY WINDS .. AND POSSIBLY SOME HAIL. PERSONS IN THE CITY OF QUINCY SHOULD PREPARE FOR STRONG AND POSSIBLY SEVERE STORMS THIS EVENING. FELDT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 7:48 PM CDT | Severe Thunderstorm Warning | LSX | Brown, Pike | 42 min |
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.