Alert archive / Illinois / Flash Flood Warnings in 2009
Flash Flood Warning 69, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Aug 19, 2009, 7:08 PM CDT for Fayette County, Illinois. It was in force for 6 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
- Aug 19, 2009, 7:08 PM CDT (00:08 UTC)
- Expired
- Aug 20, 2009, 1:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
County Fayette County, IL
The radar
The Lincoln radar (KILX), 124 km from the middle of the area, began a volume at 00:11 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, 0.1 hours before the alert went out and 123 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
- 1282 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 735 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 4.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS53 KLSX 200008
FFWLSX
ILC051-200600-
/O.NEW.KLSX.FF.W.0069.090820T0008Z-090820T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
708 PM CDT WED AUG 19 2009
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHERN FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS...
* UNTIL 100 AM CDT
* AT 707 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
VANDALIA...BROWNSTOWN...RAMSEY...ST. ELMO AND WRIGHTS CORNER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
&&
LAT...LON 3898 8881 3888 8927 3921 8925 3922 8881
3920 8880
$$
CVKING1 follow-up statement
000
WGUS73 KLSX 200555
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1255 AM CDT THU AUG 20 2009
ILC051-200607-
/O.EXP.KLSX.FF.W.0069.000000T0000Z-090820T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FAYETTE IL-
1255 AM CDT THU AUG 20 2009
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN FAYETTE
COUNTY HAS BEEN ALLOWED TO EXPIRE...
THE IMMEDIATE THREAT OF FLASH FLOODING HAS ENDED OVER FAYETTE COUNTY
BUT ADDITIONAL RAINFALL IS EXPECTED OVERNIGHT. A FLASH FLOOD WATCH
REMAINS IN EFFECT THROUGH 1 PM ON THURSDAY.
LAT...LON 3898 8881 3888 8927 3921 8925 3922 8881
3920 8880
$$
KANOFSKYNearby
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.