Alert archive / Illinois / Flash Flood Warnings in 2015
Flash Flood Warning 79, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Aug 9, 2015, 9:02 PM CDT for Madison County, Saint Clair County, Illinois. It was in force for 8 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 9, 2015, 9:02 PM CDT (02:02 UTC)
- Expired
- Aug 10, 2015, 5:00 AM CDT
- In force
- 8 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Madison County, IL, Saint Clair County, IL
The radar
The St Louis radar (KLSX), 82 km from the middle of the area, began a volume at 02:05 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 9, 10:05 PM CDT | FLASH FLOOD | Collinsville, IL | TWO TO THREE FEET OF MOVING WATER FROM NEARBY POND OVER LEBANON ROAD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 2.0 hours before the alert went out and 199 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
- 293 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1042 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
138
WGUS53 KLSX 100202
FFWLSX
ILC119-163-101000-
/O.NEW.KLSX.FF.W.0079.150810T0202Z-150810T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
902 PM CDT SUN AUG 9 2015
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN MADISON COUNTY IN SOUTHWESTERN ILLINOIS...
ST. CLAIR COUNTY IN SOUTHWESTERN ILLINOIS...
* UNTIL 500 AM CDT MONDAY
* AT 901 PM CDT...DOPPLER RADAR INDICATED AN AREA OF THUNDERSTORMS
PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO TO THREE
INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO
BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BELLEVILLE...GRANITE CITY...O'FALLON...EAST ST. LOUIS...
COLLINSVILLE...EDWARDSVILLE...FAIRVIEW HEIGHTS...SWANSEA...GLEN
CARBON...SHILOH...HIGHLAND...TROY...MARYVILLE...MASCOUTAH...PONTOON
BEACH...CENTREVILLE...LEBANON...FREEBURG...CASEYVILLE AND
WASHINGTON PARK.
ADDITIONAL RAINFALL AMOUNTS OF ONE TO THREE INCHES ARE POSSIBLE IN
THE WARNED AREA BEFORE THE THUNDERSTORMS MOVE OUT BEFORE MIDNIGHT.
THIS INCLUDES THE FOLLOWING HIGHWAYS...
INTERSTATE 70 IN ILLINOIS BETWEEN EXITS 21 AND 24.
INTERSTATE 64 IN ILLINOIS BETWEEN EXITS 9 AND 27.
THIS WARNING ALSO INCLUDES HORSESHOE LAKE STATE PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.
&&
LAT...LON 3866 8961 3865 8971 3839 8970 3833 8972
3837 9008 3880 9012 3878 8960 3870 8960
$$
TES1 follow-up statement
894
WGUS73 KLSX 100652
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
152 AM CDT MON AUG 10 2015
ILC119-163-100657-
/O.CAN.KLSX.FF.W.0079.000000T0000Z-150810T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON IL-ST. CLAIR IL-
152 AM CDT MON AUG 10 2015
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN MADISON AND ST. CLAIR
COUNTIES IN SOUTHWESTERN ILLINOIS IS CANCELLED...
THE THREAT OF ANY ADDITIONAL HEAVY RAINFALL HAS ENDED AND FLOOD
WATERS HAVE RECEDED. THERE IS NO LONGER A THREAT TO LIFE OR
PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD CLOSURES.
LAT...LON 3866 8961 3865 8971 3839 8970 3833 8972
3837 9008 3880 9012 3878 8960 3870 8960
$$
CVKINGThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:35 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair | 55 min |
| Aug 9, 8:23 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Monroe, Saint Clair, Washington | 52 min |
| Aug 9, 8:29 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair, Washington | 46 min |
| Aug 9, 8:35 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Jersey, Macoupin, Madison, Saint Clair | 40 min |
Nearby
Flash Flood Warnings in Illinois, 2015Every flash flood warning in 2015
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.