Alert archive / Illinois / Flash Flood Warnings in 1986
Flash Flood Warning 7, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at Jul 10, 1986, 9:30 PM CDT for Mercer County, Illinois. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Jul 10, 1986, 9:30 PM CDT (02:30 UTC)
- Expired
- Jul 10, 1986, 10:30 PM CDT
- In force
- 60 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
County Mercer 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, 2.5 hours before the alert went out and 325 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
- 933 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1223 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 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 KMLI 110230 FFWMLI IAC163-139-ILC161-131-073-195-110500- BULLETIN - IMMEDIATE BROADCAST REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOLINE IL 930 PM CDT THU JUL 10 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1200 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EXTREME EAST IOWA...SCOTT AND EASTERN MUSCATINE NORTHWEST ILLINOIS...ROCK-ISLAND...MERCER...HENRY AND SOUTHERN WHITESIDE SLOW MOVING STRONG THUNDERSTORMS AND VERY HEAVY RAIN ALONG WITH SATURATED GROUND CONDITIONS HAVE COMBINED TO PRODUCE EXTENSIVE LOWLAND AND URBAN FLOODING IN THESE AREAS. ADDITIONAL HEAVY RAIN WAS MOVING INTO THESE AREAS AND WILL LIKELY EXCEED TWO INCHES IN LOCALIZED AREAS..ENOUGH TO CAUSE FLASH FLOODING UNDER THESE CONDITIONS. FLASH FLOOD WARNING MEANS FLASH FLOODING IS OCCURRING OR IS IMMINENT IN THE SPECIFIED AREA. DO NOT TRY TO DRIVE THROUGH FLOODED AREAS. PERSONS ALONG OR NEAR STREAMS SUBJECT TO FLASH FLOODING SHOULD BE PREPARED TO MOVE TO A PLACE OF SAFETY IMMEDIATELY. ATTN ISP 7 AND 1. WIGGINS/FOBERT
What forecasters said that day
The local office's own words before this flash flood 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, 5:06 PM CDT, 4 hours 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOLINE IL 505 PM CDT THU JUL 10 1986 ...SHOWERS AND THUNDERSTORMS MOVING INTO EASTERN IOWA... AT 5 PM CDT..RADAR SHOWED SCATTERED SHOWERS DEVELOPING ATND MOVING INTO EASTERN IOWA. THE STRONGEST WAS SOUTHWEST OF IOWA CITY AND ANOTHER STRONG ONE WAS IN EXTREME SOUTHEAST IOWA NEAR KEOSAUQUA. SHOWERS AND THUNDERSTORMS WERE MOVING MAINLY EAST ABOUT 35 MPH. WIGGINS
Special weather statement, Jul 10, 7:39 PM CDT, 1 hour 51 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOLINE IL 740 PM CDT THU JUL 10 1986 ...STRONG THUNDERSTORMS APPROACHING EXTREME SOUTHEAST IOWA... AT 730PM CDT..RADAR SHOWED STRONG THUNDERSTORMS LOCATED OVER NORTHEAST MISSOURI BETWEEN KIRKSVILLE MISSOURI AND QUINCY ILLINOIS. KIRKSVILLE REPORTED WIND GUSTS UP TO 48 MPH SHORTLY BEFORE 7PM AND QUINCY REPORTED GUSTS OVER 60 MPH AROUND 7PM. THESE STORMS WERE MOVING TO THE EAST NORTHEAST AT 30 MILES AN HOUR AND WILL PASS OVER PARTS OF SOUTHERN LEE COUNTY IOWA BETWEEN 745 AND 845 PM. STRONG GUSTY WINDS..HAIL AND VERY HEAVY RAIN ARE POSSIBLE WITH THESE STORMS. PERSONS SHOULD MONITOR RADIO AND TV AND LISTEN FOR FURTHER STATEME#NTS OR WARNINGS AND BE PREPARED TO SEEK SHELTER IF SEVERE WEATHER OCCURS. FOBERT
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 9:30 PM CDT | Flash Flood Warning | DVN | Henry, Rock Island, Whiteside | 60 min |
Nearby
Flash Flood Warnings in Illinois, 1986Every flash flood 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.