Alert archive / Illinois / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 50, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 10, 1987, 4:06 PM CDT for Adams County, Illinois. It was in force for 24 min.
The area
The counties it named.
The facts
- Issued
- Jul 10, 1987, 4:06 PM CDT (21:06 UTC)
- Expired
- Jul 10, 1987, 4:30 PM CDT
- In force
- 24 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, 9.1 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
- 1062 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 762 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -68 m²/s²
- 0-3 km storm-relative helicity
- -62 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 102107 SVRSTL ILC001-102130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 406 PM CDT FRI JUL 10 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF WEST CENTRAL ILLINOIS... ADAMS...INCLUDING THE CITY OF QUINCY AT 405 PM CDT A SEVERE THUNDERSTORM WAS NEAR QUINCY ILLINOIS MOVING TO THE EAST SOUTHEAST AT 25 MPH. 50 MPH WINDS WERE REPORTED 10 MILES NORTH OF QUINCY JUST AFTER 4 PM. 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 FLOODHING OF STREAMS AND LOW AREAS. MCCARTHY
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 10, 1:45 PM CDT, 2 hours 21 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 135 PM CDT FRI 10 JUL 1987 AT 125 PM CDT RADAR INDICATED AN AREA OF STRONG THUNDERSTORMS 25 MILES WEST OF KIRKSVILLE IN NORTHERN MISSOURI. VERY HEAVY RAIN WAS INDICATED IN THIS AREA OF STORMS AND HIGH WINDS CAUSED TREE AND POWER LINE DAMAGE IN UNIONVILLE. THERE IS ALSO THE POSSIBILITY OF HAIL. THE ARE OF THUNDERSTORMS WAS MOVING SOUTHEAST AT 25 MPH AND WAS INTO THE NORTHERN PORTION OF LINN COUNTY IN NORTH CENTRAL MISSOURI AND WILL LIKELY REACH NORTHERN MACON COUNTY IN THE NEXT HOUR. PERSONS IN THESE COUNTIES SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AND BE PREPARED TO MOVE TO A PLACE OF SAFETY IF THREATENING WEATHER DEVELOPS.
Special weather statement, Jul 10, 2:11 PM CDT, 1 hour 55 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 210 PM CDT FRI JUL 10 1987 ...STRONG THUNDERSTORMS IN NORTHEAST MISSOURI... JUST AFTER 2 PM A LINE OF STRONG THUNDERSTORMS STRETCHED FROM NEAR BURLINGTON IOWA INTO NORTHEAST MISSOURI...NEAR KIRKSVILLE...INTO THE NORTH CENTRAL PART OF THE STATE. THEY WERE MOVING TO THE SOUTHEAST AT 20 MPH AND COULD PRODUCE VERY HEAVY RAIN AND STRONG... GUSTY WINDS. MCCARTHY
Special weather statement, Jul 10, 2:47 PM CDT, 1 hour 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 340 PM CDT FRI 10 JUL 1987 AT 235 PM CDT STRONG THUNDERSTORMS WERE OVER THE NORTHERN PORTION OF LINN AND MACON COUNTIES OF NORTHCENTRAL MISSOURI. HEAVY RAIN WAS INDICATED IN THE STORMS AND THEY MAY PRODUCE STRONG GUSTY WINDS OF 35 TO 45 MPH AND SMALL HAIL. THE STORMS WERE MOVING SOUTHEAST AT 25 MPH AND WILL CONTINUE TO MOVE ACROSS MACON COUNTY DURING THE NEXT HOUR.
Special weather statement, Jul 10, 2:49 PM CDT, 1 hour 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 240 PM CDT FRI 10 JUL 1987 AT 235 PM CDT STRONG THUNDERSTORMS WERE OVER THE NORTHERN PORTION OF LINN AND MACON COUNTIES OF NORTHCENTRAL MISSOURI. HEAVY RAIN WAS INDICATED IN THE STORMS AND THEY MAY PRODUCE STRONG GUSTY WINDS OF 35 TO 45 MPH AND SMALL HAIL. THE STORMS WERE MOVING SOUTHEAST AT 25 MPH AND WILL CONTINUE TO MOVE ACROSS MACON COUNTY DURING THE NEXT HOUR.
Special weather statement, Jul 10, 4:01 PM CDT, 5 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 400 PM CDT FRI JUL 10 1987 ...STRONG THUNDERSTORMS IN NORTHEAST MISSOURI... AT 400 PM CDT...WEATHER SERVICE RADAR INDICATED VERY STRONG THUNDERSTORMS IN ADAMS COUNTY ILLINOIS IN THE VICINITY OF QUINCY. THESE STORMS WERE MOVING TO THE SOUTHEAST AROUND 25 MPH. PERSONS IN ADAMS COUNTY ILLNOIS CAN EXPECT A PERIOD OF THUNDERSTORMS BETWEEN 400 AND 530 PM THIS AFTERNOON. STRONG GEUSTY WINDS AND HEAVY RAIN MAY ACCOMPANY THE STORMS. SCHROEDER
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.