Alert archive / Illinois / Flash Flood Warnings in 1990
Flash Flood Warning 41, NWS Lincoln, IL
NWS Lincoln, IL issued this flash flood warning at Aug 19, 1990, 2:01 AM CDT for Stephenson County, Illinois. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 19, 1990, 2:01 AM CDT (07:01 UTC)
- Expired
- Aug 19, 1990, 4:10 AM CDT
- In force
- 2 hr
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
County Stephenson 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
Green Bay/Straub, WI (KGRB), launched 00:00Z, 7.0 hours before the alert went out and 268 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 552 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 138 m²/s²
- 0-3 km storm-relative helicity
- 300 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KRFD 190701
FFWRFD
ILC177-201-007-191000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ROCKFORD IL
201 AM CDT SUN AUG 19 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 500 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE NORTH CENTRAL PART OF ILLINOIS
STEPHENSON...WINNEBAGO...BOONE
AT 2 AM CDT NUMEROUS THUNDERSTORMS CONTINUE TO TRACK ACROSS PARTS
OF NORTHERN ILLINOIS. MANY OF THE STORMS WERE PRODUCING VERY
HEAVY RAINS. OVER 2 INCHES OF RAIN HAD FELL HERE IN ROCKFORD SINCE
AROUND MIDNIGHT. THE THUNDERSTORMS WILL CONTINUE FOR SEVERAL MORE
HOURS EARLY THIS SUNDAY MORNING. STREET FLOODING AND FLOODING OF
LOW LYING AREAS IS ALREADY OCCURRING IN THE WARNED COUNTIES.
SOME COMMUNITIES THAT ARE IN OR NEAR THE FLASH FLOOD AREA...
FREEPORT...ROCKFORD...LOVES PARK...MACHESNEY PARK...AND
BELVIDERE.
THIS FLOOD WARNING MEANS THAT FLOODING IS AN IMMEDIATED THREAT!
PERSONS IN LOW LYING OR FLOOD PRONE AREAS MOVE TO HIGHER GROUND..
IF YOU ARE IN AREAS WHERE YOU ARE NOT FAMILIAR... BE EXTREMELY
CAUTIOUS AND CONSIDER HEADING FOR HIGHER GROUND. IF CAMPING OR
IN A CAR WATCH FOR RAPIDLY RISING WATER THAT MAY ENDANGER YOUR
CAMPSITE OR CUT OFF ESCAPE ROUTES. DO NOT CROSS ROADS COVERED
BY WATER... THE ROAD MAY BE WASHED OUT OR THE WATER MUCH DEEPER
THAN YOU THINK! REMEMBER THESE FLOODS HAPPEN RAPIDLY... BE ALERT!
ATTN: ISP DIWST [1..2..16 FIELDSThe office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 2:01 AM CDT | Flash Flood Warning | ILX | Boone, Winnebago | 2 hr |
| Aug 19, 4:32 AM CDT | Flash Flood Warning | ILX | Boone, DeKalb, Winnebago | 58 min |
| Aug 19, 5:09 PM CDT | Tornado Warning | ILX | Stephenson, Winnebago | 36 min |
| Aug 19, 5:35 PM CDT | Tornado Warning | ILX | Boone, Winnebago | 40 min |
| Aug 19, 6:13 PM CDT | Flash Flood Warning | ILX | Boone, DeKalb, Lee, Ogle, Winnebago | 2 hr |
| Aug 19, 6:13 PM CDT | Flash Flood Warning | ILX | Carroll, Stephenson | 2 hr |
Nearby
Flash Flood Warnings in Illinois, 1990Every flash flood warning in 1990
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.