Alert archive / Illinois / Flash Flood Warnings in 2000

Flash Flood Warning 14, NWS St. Louis, MO

July 28, 2000Macoupin County, Illinois

NWS St. Louis, MO issued this flash flood warning at Jul 28, 2000, 4:27 AM CDT for Macoupin County, Illinois. It was in force for 3 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
Jul 28, 2000, 4:27 AM CDT (09:27 UTC)
Expired
Jul 28, 2000, 7:20 AM CDT
In force
3 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

County Macoupin County, IL

The radar

The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 09:28 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 9.5 hours before the alert went out and 150 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 00:00Z on 2000-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1924 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 00:00Z on 2000-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
1924 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1232 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.5

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 280935 COR
FFWSTL
ILC117-281220-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTED
NATIONAL WEATHER SERVICE ST LOUIS MO
427 AM CDT FRI JUL 28 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MACOUPIN COUNTY IN SOUTHWESTERN ILLINOIS

* UNTIL 720 AM CDT

* AT 420 AM CDT WEATHER SERVICE DOPPLER RADAR INDICATED 2-3 INCHES   
  OF RAIN HAD FALLEN OVER MUCH OF CENTRAL MACOUPIN COUNTY WITH       
  ISOLATED AMOUNTS OF UP TO 4 INCHES IN SOME LOCATIONS.

SOME TOWNS THAT WILL BE AFFECTED...

* CARLINVILLE AND GILLESPIE

  IF FLASH FLOODING IS OBSERVED OR IMMINENT...MOVE QUICKLY TO HIGHER
  GROUND. NEVER DRIVE INTO AN AREA WHERE WATER COVERS THE ROAD...
  ESPECIALLY LOW-WATER BRIDGES

  VA/TS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 3:52 AM CDTSevere Thunderstorm WarningLSXMacoupin, Madison48 min
Jul 28, 5:35 AM CDTSevere Thunderstorm WarningLSXMadison50 min

Nearby

Flash Flood Warnings in Illinois, 2000Every flash flood warning in 2000

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; radar from the NEXRAD Level II archive.