Alert archive / Illinois / Flash Flood Warnings in 1997

Flash Flood Warning 8, NWS Lincoln, IL

September 8, 1997Mason County, Tazewell County, Illinois

NWS Lincoln, IL issued this flash flood warning at Sep 8, 1997, 3:00 PM CDT for Mason County, Tazewell County, Illinois. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 8, 1997, 3:00 PM CDT (20:00 UTC)
Expired
Sep 8, 1997, 5:00 PM CDT
In force
2 hr
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Mason County, IL, Tazewell County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.0 hours before the alert went out and 98 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, Lincoln, IL at 12:00Z on 1997-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 568 joules per kilogram.LCLLFCEL10008507005003002001001 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, Lincoln, IL at 12:00Z on 1997-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 square meters per square second.193958Sfc1 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
568 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
768 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
181 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSPI 082000
FFWSPI
ILC125-179-082200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
300 PM CDT MON SEP 8 1997

* FLASH FLOOD WARNING FOR
  NORTHERN MASON COUNTY IN CENTRAL ILLINOIS
  SOUTHERN TAZEWELL COUNTY IN CENTRAL ILLINOIS

* UNTIL 500 PM CDT
 
* SOME AREAS AFFECTED
  SOUTH PEKIN
  GREEN VALLEY
  MANITO

* CAUSE AND EFFECT
  NEARLY STATIONARY STRONG THUNDERSTORMS LOCATED ACROSS SOUTHERN
  TAZEWELL AND NORTHERN MASON COUNTIES WERE PRODUCING VERY HEAVY
  RAINFALL

* FORECAST CONDITIONS
  HEAVY RAINFALL RATES OF AROUND 2 INCHES AN HOUR CAN BE EXPECTED.

MOVE TO HIGHER GROUND IMMEDIATELY IF FLOODWATERS THREATEN AND AVOID
DRIVING ACROSS FLOODED ROADS.

PLAHMER/FRIEDERS

Nearby

Flash Flood Warnings in Illinois, 1997Every flash flood warning in 1997

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.