Alert archive / Illinois / Flash Flood Warnings in 1990

Flash Flood Warning 21, NWS Lincoln, IL

June 20, 1990Cass County, Menard County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jun 20, 1990, 8:05 AM CDT for Cass County, Menard County, Illinois. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 20, 1990, 8:05 AM CDT (13:05 UTC)
Expired
Jun 20, 1990, 11:30 AM CDT
In force
3 hr
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Cass County, IL, Menard 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

Paducah/Barkley, KY (KPAH), launched 12:00Z, 1.1 hours before the alert went out and 346 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, Paducah/Barkley, KY at 12:00Z on 1990-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3475 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, Paducah/Barkley, KY at 12:00Z on 1990-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 298 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
3475 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
778 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
298 m²/s²
0-3 km storm-relative helicity
311 m²/s²
Significant tornado parameter
0.0
Supercell composite
9.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSPI 201308
FFWSPI
ILC017-137-117-129-167-021-135-201630-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD IL
805 AM CDT WED JUN 20 1990

THE NATIONAL WEATHER SERVICE HAS EXTENDED THE FLASH FLOOD WARNING
EFFECTIVE UNTIL 1130 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES

   IN THE CENTRAL PART OF ILLINOIS
      CASS...MORGAN...MACOUPIN...MENARD...SANGAMON...
      CHRISTIAN...MONTGOMERY

RAINFALL IN EXCESS OF THREE INCHES HAS BEEN REPORTED SINCE MIDNIGHT.
SHOWERS AND THUNDERSTORMS ARE CONTINUING OVER THE WEST CENTRAL POR/
TIONS OF ILLINOIS

MORGAN COUNTY SHERIFF REPORTS SEVERAL ROADS REMAIN CLOSED WITH SOUTH
JACKSONVILLE AND FRANKLIN REPORTING SIGNIFICANT FLOODING PROBLEMS.
THIS AREA IS 30  TO 35 MILES WEST TO SOUTHWEST OF SPRINGFIELD.

SEVERAL ROADS REMAINED CLOSED IN SPRINGFIELD THIS MORNING.


STAY OUT OF DRY CREEK BEDS AND LOW LYING AREAS.  FLASH FLOODS CAN
OCCUR WITH LgITTLE OR NO ADVANCE WARNING.

DO NOT ATTEMPT TO DRIVE OVER ROADS COVERED BY FLOOD WATERS.

 ATTN ISP DIST...9AND 18
 FENLEY

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 9:55 PM CDTSevere Thunderstorm WarningILXKnox, Peoria, Stark65 min
Jun 19, 10:05 PM CDTSevere Thunderstorm WarningILXBureau55 min
Jun 19, 10:17 PM CDTSevere Thunderstorm WarningILXLee43 min
Jun 19, 10:48 PM CDTTornado WarningILXPeoria, Woodford27 min
Jun 19, 10:56 PM CDTSevere Thunderstorm WarningILXDeKalb49 min
Jun 19, 11:08 PM CDTTornado WarningILXKnox37 min
Jun 19, 11:41 PM CDTSevere Thunderstorm WarningILXFulton, McDonough, Warren64 min
Jun 19, 11:50 PM CDTFlash Flood WarningILXKnox, Peoria, Warren4 hr
Jun 20, 12:47 AM CDTSevere Thunderstorm WarningILXMcLean, Tazewell58 min
Jun 20, 1:06 AM CDTTornado WarningILXSchuyler39 min
Jun 20, 1:10 AM CDTSevere Thunderstorm WarningILXLogan, Menard65 min
Jun 20, 1:39 AM CDTFlash Flood WarningILXFulton, Tazewell3 hr
Jun 20, 1:40 AM CDTSevere Thunderstorm WarningILXMacon65 min
Jun 20, 2:00 AM CDTFlash Flood WarningILXWoodford3 hr
Jun 20, 2:01 AM CDTSevere Thunderstorm WarningILXMoultrie, Shelby59 min
Jun 20, 2:06 AM CDTFlash Flood WarningILXSangamon3 hr
Jun 20, 2:18 AM CDTFlash Flood WarningILXMcDonough, Schuyler3 hr
Jun 20, 2:30 AM CDTSevere Thunderstorm WarningILXChristian60 min
Jun 20, 2:44 AM CDTSevere Thunderstorm WarningILXColes, Edgar61 min
Jun 20, 3:06 AM CDTSevere Thunderstorm WarningILXClark, Cumberland69 min
Jun 20, 3:31 AM CDTFlash Flood WarningILXClark, Coles, Cumberland3 hr
Jun 20, 3:31 AM CDTFlash Flood WarningILXEdgar3 hr
Jun 20, 5:09 AM CDTFlash Flood WarningILXCass, Menard, Sangamon3 hr
Jun 20, 5:09 AM CDTFlash Flood WarningILXMacoupin, Montgomery, Morgan3 hr
Jun 20, 5:09 AM CDTFlash Flood WarningILXChristian3 hr
Jun 20, 5:27 AM CDTFlash Flood WarningILXFulton, McDonough, Schuyler3 hr
Jun 20, 5:27 AM CDTFlash Flood WarningILXMason3 hr
Jun 20, 8:05 AM CDTFlash Flood WarningILXChristian, Montgomery, Sangamon3 hr
Jun 20, 8:05 AM CDTFlash Flood WarningILXMacoupin, Morgan3 hr
Jun 20, 8:30 AM CDTFlash Flood WarningILXFulton, McDonough, Mason, Schuyler110 min
Jun 20, 9:00 AM CDTFlash Flood WarningILXFulton, McDonough, Schuyler90 min
Jun 20, 9:00 AM CDTFlash Flood WarningILXMason90 min

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.