Alert archive / Illinois / Flash Flood Warnings in 1990

Flash Flood Warning 4, NWS St. Louis, MO

May 16, 1990Calhoun County, Illinois

NWS St. Louis, MO issued this flash flood warning at May 16, 1990, 4:45 AM CDT for Calhoun County, Illinois. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
May 16, 1990, 4:45 AM CDT (09:45 UTC)
Expired
May 16, 1990, 9:00 AM CDT
In force
4 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

County Calhoun 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 00:00Z, 9.8 hours before the alert went out and 290 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 00:00Z on 1990-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1196 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 00:00Z on 1990-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 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
1196 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1228 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
286 m²/s²
Significant tornado parameter
0.8
Supercell composite
7.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTL 160943
FFWSTL
ILC013-MOC113-183-219-161400-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
445 AM CDT WED MAY 16 1990
 
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSU

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 15, 7:30 PM CDTSevere Thunderstorm WarningLSXJefferson, Marion60 min
May 15, 11:03 PM CDTSevere Thunderstorm WarningLSXAdams, Pike42 min
May 16, 12:13 AM CDTSevere Thunderstorm WarningLSXGreene, Scott47 min
May 16, 12:13 AM CDTSevere Thunderstorm WarningLSXCalhoun47 min
May 16, 1:14 AM CDTSevere Thunderstorm WarningLSXCalhoun, Jersey, Madison46 min
May 16, 3:47 PM CDTFlash Flood WarningLSXCalhoun, Jersey, Madison7 hr
May 16, 5:39 PM CDTSevere Thunderstorm WarningLSXMonroe, Saint Clair51 min
May 16, 5:52 PM CDTSevere Thunderstorm WarningLSXClinton, Washington53 min
May 16, 6:07 PM CDTSevere Thunderstorm WarningLSXRandolph53 min
May 16, 6:39 PM CDTSevere Thunderstorm WarningLSXJefferson, Perry51 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.