Alert archive / Illinois / Flash Flood Warnings in 1990

Flash Flood Warning 5, NWS Chicago, IL

December 29, 1990Ford County, Livingston County, Illinois

NWS Chicago, IL issued this flash flood warning at Dec 29, 1990, 9:15 AM CST for Ford County, Livingston County, Illinois. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Dec 29, 1990, 9:15 AM CST (15:15 UTC)
Expired
Dec 29, 1990, 6:00 PM CST
In force
9 hr
Issued by
NWS Chicago, IL
Area
Whole counties

Counties Ford County, IL, Livingston 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

Dayton/James M C, OH (KDAY), launched 12:00Z, 3.3 hours before the alert went out and 367 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.

Skew-T log-pSkew-T log-p diagram, Dayton/James M C, OH at 12:00Z on 1990-12-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dayton/James M C, OH at 12:00Z on 1990-12-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 347 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
537 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
347 m²/s²
0-3 km storm-relative helicity
347 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Dec 29, 3:49 AM CST, 5 hours 26 minutes before
ILZ001-002-291330-

SHORT RANGE WEATHER OUTLOOK FOR NORTHERN ILLINOIS
NATIONAL WEATHER SERVICE ROCKFORD IL
345 AM CST SAT DEC 29 1990

AT 3 45 AM CST...THESE NORTHERN ILLINOIS COUNTIES ALL REPORTED
THAT THEIR SECONDARY ROADS WERE SLICK OR IMPASSABLE...JO DAVIESS...
STEPHENSON...BOONE...CARRROLL...OGLE...WHITESIDE...LEE AND DE KALB.
THEY ALSO ADVISED THAT A NUMBER OF MAIN ROADS WERE SLICK.

THE DE KALB AND BOONE COUNTY SHERIFFS REPORTED RAIN...THE WHITESIDE
SHERIFF REPORTED FREEZING RAIN...THE LEE AND OGLE SHERIFFS REPORTED
DRIZZLE AND THE CARROLL COUNTY SHERIFF REPORTED FREEZING DRIZZLE.
THIS RAIN IS FREEZING ONTO THE GROUND IN MANY LOCATIONS AND IS ALSO
WASHING THE ROAD CREWS SALT OFF THE ROADS.

I RECOMMENDED THAT YOU REMAIN HOME TONIGHT...BUT IF YOU MUST TRAVEL
...REMEMBER TO GO SLOW AND ALLOW PLENTY OF TIME TO REACH YOUR
DESTINATION. REMEMBER...YOU MAY NOT BE ABLE TO SEE ICE ON THE ROAD UNTIL
YOU ARE ON THE ICE.

BELL

ATTN: `ISP 1..2..16.
Special weather statement, Dec 29, 4:30 AM CST, 4 hours 45 minutes before
ILZ003-005-008-291330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
4 30 AM CST SAT DEC 29 1990

A MILD RAINY MORNING WILL GIVE WAY TO A COLD AND WINTRY AFTERNOON.

ANOTHER ARCTIC FRONT WILL BE MOVING THROUGH CHICAGO AND NORTHEAST
ILLINOIS BY MID DAY SENDING TEMPERATURES ON A DOWNWARD SPIRAL THAT
WILL SEE MORNING READING IN THE 40S FALL INTO THE 20S BY EARLY
AFTERNOON AND TO 15 TO 20 BY EVENING.

A WET RAINY MORNING... MAY BECOME AN ICY AFTERNOON AS TEMPERATURES
DROP BELOW FREEZING AND FREEZING DRIZZLE DEVELOPS. SOME SNOW MAY
OCCUR BY DARK.

GUSTY NORTHWEST WINDS WILL USHER IN THE COLDER AIR.

KAHN
Special weather statement, Dec 29, 5:18 AM CST, 3 hours 57 minutes before
ILZ003-005-008-291330-

URBAN AND SMALL STREAM FLOOD ADVISORY
NATIONAL WEATHER SERVICE CHICAGO IL
5 00 AM CST SAT DEC 29 1990

RAIN HAS BEEN FALLING ACROSS NORTHEAST ILLINOIS AND THE CHICAGO
METROPOLITAN AREA SINCE LATE FRIDAY AFTERNOON.

THROUGH 5 AM RAINFALL TOTALS WERE AVERAGING AROUND 1/2 TO 2/3 OF
AN INCH... BUT A FEW LOCALITIES SOUTH OF CHICAGO WERE APPROACHING
THE ONE INCH MARK.

THE RAIN IS EXPECTED TO CONTINUE THROUGH THE EARLY MORNING HOURS.
MOTORISTS SHOULD BE ALERT FOR STANDING WATER ON ROADWAYS. PERSONS
IN LOW LYING AREAS NEAR CREEKS AND STREAMS SHOULD BE ALERT FOR
RISING WATER LEVELS AND POSSIBLE MINOR FLOODING.

TYPICAL URBAN TYPE FLOODING OF STREETS...VIADUCTS AND BASEMENTS
MAY ALSO OCCUR.

KAHN
Special weather statement, Dec 29, 6:44 AM CST, 2 hours 31 minutes before
ILZ001-002-291630-

SHORT RANGE WEATHER OUTLOOK FOR NORTHERN ILLINOIS
NATIONAL WEATHER SERVICE ROCKFORD IL
645 AM CST SAT DEC 29 1990

AT 6 45 AM CST...THESE NORTHERN ILLINOIS COUNTIES ALL REPORTED
THAT THEIR SECONDARY ROADS WERE SLICK OR IMPASSABLE...JO DAVIESS...
STEPHENSON...BOONE...CARRROLL...OGLE...WHITESIDE...LEE AND DE KALB.
THEY ALSO ADVISED THAT A NUMBER OF MAIN ROADS WERE SLICK. THE OGLE
COUNTY SHERIFF REPORTED STANDING WATER ON MANY ROADS.

AREAS OF RAIN OR DRIZZLE WERE WIDESPREAD ACROSS NORTHERN ILLINOIS AND
ARE EXPECTED TO CONTINUE TO AT LEAST 9 AM. WINNEBAGO COUNTY HAD RAIN...
THE SHERIFFS OF BOONE AND OGLE COUNTY ALSO REPORTED RAIN. DRIZZLE WAS
REPORTED BY THE SHERIFFS OF STEPHENSON...CARROLL AND DE KALB COUNTIES.
LEE COUNTY WAS RECEIVING FREEZING DRIZZLE.

YOU SHOULD REMAIN HOME TODAY...BUT...IF YOU MUST TRAVEL...REMEMBER
TO GO SLOW AND ALLOW PLENTY OF TIME TO REACH YOUR DESTINATION.
REMEMBER...YOU MAY NOT BE ABLE TO -SEE ICE ON THE ROAD UNTIL
YOU ARE ALREADY DRIVING OVER IT.

BELL

ATTN: ISP 1..2..16.
Special weather statement, Dec 29, 7:00 AM CST, 2 hours 15 minutes before
ILZ003-005-008-291630-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
7 00 AM CST SAT DEC 29 1990

A MILD RAINY MORNING WILL GIVE WAY TO A COLD AND WINTRY AFTERNOON.

ANOTHER ARCTIC FRONT WILL BE MOVING THROUGH CHICAGO AND NORTHEAST
ILLINOIS AROUND MIDDAY SENDING TEMPERATURES ON A DOWNWARD SPIRAL THAT
WILL SEE MORNING READING IN THE 40S FALL INTO THE 20S BY EARLY
AFTERNOON AND TO 15 TO 20 BY EVENING.

A WET RAINY MORNING... MAY BECOME AN ICY AFTERNOON AS TEMPERATURES
DROP BELOW FREEZING AND FREEZING DRIZZLE DEVELOPS. SOME SNOW MAY
OCCUR BY DARK.

THE BEAR KANSAS CITY GAME SCHEDULED TO BEGIN AT 11 30 AM WILL START
IN MILD DAMP WEATHER WITH TEMPERATURES IN THE 40S... BUT SHO@ULD END
IN AN ICY CHILL WITH TEMPERATURES FALLING INTO THE 20S AND STRONG
NORTH TO NORTHWEST WINDS OF 15 TO 25 MPH.

KAHN

The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 29, 9:15 AM CSTFlash Flood WarningLOTIroquois9 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.