Alert archive / Illinois / Flash Flood Warnings in 2009
Flash Flood Warning 72, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Sep 20, 2009, 11:06 AM CDT for Greene County, Macoupin County, Illinois. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 20, 2009, 11:06 AM CDT (16:06 UTC)
- Expired
- Sep 20, 2009, 3:00 PM CDT
- In force
- 4 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Greene County, IL, Macoupin County, IL
The radar
The St Louis radar (KLSX), 80 km from the middle of the area, began a volume at 16:06 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 12:00Z, 4.1 hours before the alert went out and 166 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1235 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS53 KLSX 201606
FFWLSX
ILC061-117-202000-
/O.NEW.KLSX.FF.W.0072.090920T1606Z-090920T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1106 AM CDT SUN SEP 20 2009
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
GREENE COUNTY IN SOUTHWEST ILLINOIS...
NORTHWESTERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...
* UNTIL 300 PM CDT
* AT 1102 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. LOCAL LAW ENFORCEMENT REPORTED FLOODING OCCURRING
ACROSS THE WARNED AREA.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...WHITE
HALL...ATHENSVILLE...CARROLLTON...GREENFIELD...OLD KANE...PALMYRA
AND ROODHOUSE.
HIGHWAY 67 WAS CLOSED DUE TO HIGH WATER JUST NORTH OF CARROLLTON.
NUMEROUS OTHER LOCATIONS WERE REPORTED TO HAVE WATER FLOWING OVER
ROADWAYS ACROSS THE WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO ARE POSSIBLE IN THE WARNED
AREA.
&&
LAT...LON 3953 8993 3926 9002 3926 9019 3923 9021
3923 9031 3918 9032 3918 9056 3953 9054
$$
TILLY1 follow-up statement
000
WGUS73 KLSX 201958
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
258 PM CDT SUN SEP 20 2009
ILC061-117-202013-
/O.EXP.KLSX.FF.W.0072.000000T0000Z-090920T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENE IL-MACOUPIN IL-
258 PM CDT SUN SEP 20 2009
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHWESTERN
MACOUPIN AND GREENE COUNTIES WILL BE ALLOWED TO EXPIRE AT 300 PM
CDT...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
LAT...LON 3953 8993 3926 9002 3926 9019 3923 9021
3923 9031 3918 9032 3918 9056 3953 9054
$$
TILLYNearby
Flash Flood Warnings in Illinois, 2009Every flash flood warning in 2009
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.