Alert archive / Illinois / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 55, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Jul 29, 1987, 5:54 PM CDT for Knox County, Illinois. It was in force for 66 min.
The area
The counties it named.
The facts
- Issued
- Jul 29, 1987, 5:54 PM CDT (22:54 UTC)
- Expired
- Jul 29, 1987, 7:00 PM CDT
- In force
- 66 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
County Knox 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, 10.9 hours before the alert went out and 59 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
- 1658 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 1058 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 52 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 KPIA 292256 SVRPIA ILC095-300000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PEORIA IL 554 PM CDT WED JUL 29 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 700 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF WEST CENTRAL ILLINOIS...CENTRAL KNOX AT 545 PM..RADAR INDICATED A SEVERE THUNDERSTORM ON THE SOUTH EDGE OF GALESBURG ILLINOIS. THIS STORM WAS MOVING EAST SOUTHEAST AT 20 TO 25 MPH. TOWNS IN AND NEAR THE PATH OF THIS STORM ARE GALESBURG.. KNOXVILLE..APPLETON..GILSON..DAHINDA..AND WILLIAMSFIELD. IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORCED SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND LIGHTNING. ATTN ISP DIST 7 PALMER.
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 29, 2:38 PM CDT, 3 hours 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 235 PM CDT WED JUL 29 1987 ...THUNDERSTORM WITH HEAVY RAIN NORTHWEST OF PEORIA ILLINOIS... AT 230 PM..RADAR INDICATED A THUNDERSTORM WITH HEAVY RAIN 35 MILES NORTHWEST OF PEORIA FROM 10 MILES NORTH OF KEWANEE ILLINOIS.. THROUGH KEWANEE TO 15 MILES SOUTH OF KEWANEE TO NEAR TOULON. WEATHER SPOTTERS AT KEWANEE REPORT NO SEVERE WEATHER WITH THIS THUNDERSTORM. THE STORM WAS MOVING EAST SOUTHEAST AT 20 MPH TOWARD THE COMMUNITIES OF SHEFFIELD..WYANET..TISKILWA..BRADFORD AND WYOMING. EXPECT DANGEROUS LIGHTNING..HEAVY RAIN..SOME SMALL HAIL..AND BRIEF GUSTY WINDS TO 40 MPH WITH THIS THUNDERSTORM. A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT FOR A LARGE PART OF NORTHERN ILLINOIS INCLUDING PUTNAM..MARSHALL AND LA SALLE COUNTIES UNTIL 6 PM CDT. PALMER ATTN ISP DISTS..7..8..AND 17
Special weather statement, Jul 29, 2:41 PM CDT, 3 hours 13 minutes before
SPECIAL WEATHER STATEMENT...........CORRECTION FOR BUREAU COUNTY... NATIONAL WEATHER SERVICE PEORIA IL 235 PM CDT WED JUL 29 1987 ...THUNDERSTORM WITH HEAVY RAIN NORTHWEST OF PEORIA ILLINOIS... AT 230 PM..RADAR INDICATED A THUNDERSTORM WITH HEAVY RAIN 35 MILES NORTHWEST OF PEORIA FROM 10 MILES NORTH OF KEWANEE ILLINOIS.. THROUGH KEWANEE TO 15 MILES SOUTH OF KEWANEE TO NEAR TOULON. WEATHER SPOTTERS AT KEWANEE REPORT NO SEVERE WEATHER WITH THIS THUNDERSTORM. THE STORM WAS MOVING EAST SOUTHEAST AT 20 MPH TOWARD THE COMMUNITIES OF SHEFFIELD..WYANET..TISKILWA..BRADFORD AND WYOMING. EXPECT DANGEROUS LIGHTNING..HEAVY RAIN..SOME SMALL HAIL..AND BRIEF GUSTY WINDS TO 40 MPH WITH THIS THUNDERSTORM. A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT FOR A LARGE PART OF NORTHERN ILLINOIS INCLUDING PUTNAM..BUREAU AND LA SALLE COUNTIES UNTIL 6 PM CDT. PALMER ATTN ISP DISTS..7..8..AND 17
Special weather statement, Jul 29, 3:46 PM CDT, 2 hours 8 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD IL
3 40 PM CDT WED JUL 29 1987
...STRONG THUNDERSTORM IN MONTGOMERY COUNTY...
AT 337 PM CDT PUBLIC REPORTED MARBLE SIZE HAIL...WIND GUST TO 48 MPH
AND VERY HEAVY RAINFALL IN LITCHFIELD ILLINOIS.
THE THUNDERSTORM IS MOVING EASTSOUTHEAST TOWARD THE CITY OF HILLSBORO
ILLINOIS IN SOUTHERN MONTGOMERY COUNTY.
HILLIARD
: [ ]Special weather statement, Jul 29, 5:28 PM CDT, 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 530 PM CDT WED JUL 29 1987 ...STRONG THUNDERSTORM 20 MILES NORTHWEST OF PEORIA ILLINOIS... AT 515 PM CDT..RADAR INDICATED A STRONG THUNDERSTORM 20 MILES NORTHWEST OF PEORIA IN NORTHWEST PEORIA COUNTY. THIS STORM WILL PRODUCE DANGEROUS LIGHTNING..PEA TO MARBLE SIZE HAIL.. BRIEF GUSTY WIND TO AROUND 45 MPH AND HEAVY RAIN. THE STORM WAS MOVING EAST SOUTHEAST AT 20 TO 25 MPH TOWARD THE COMMUNITIES OF BRIMFIELD..PRINCEVILLE..DUNLAP AND CHILLICOTHE. RAIN SHOWERS FROM THIS STORM EXTENDED SOUTH AND MAY BRUSH ACROSS THE PEORIA AREA. OTHER SHOWERS AND THUNDERSTORMS EXTENDED NORTH FROM THIS STORM THROUGH KEWANEE..BRADFORD AND PRINCETON. OTHER SHOWERS AND THUNDERSTORMS WERE OVER WESTERN ILLINOIS FROM WEST OF MONMOUTH TO 20 MILES NORTHWEST OF MACOMB TO NAUVOO. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF CENTRAL ILLINOIS INCLUDING PEORIA..STARK..BUREAU..PUTNAM..MARSHALL.. WOODFORD..TAZEWELL..MASON..MC LEAN..AND LA SALLE COUNTIES UNTIL 900 PM. PALMER ATTN ISP DISTS..6..7..8..9..14 AND 17
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.