Alert archive / Illinois / Flash Flood Warnings in 2016
Flash Flood Warning 52, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Oct 19, 2016, 11:39 PM CDT for Monroe County, Illinois. It was in force for 8 hr. 2 reports 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
- Oct 19, 2016, 11:39 PM CDT (04:39 UTC)
- Expired
- Oct 20, 2016, 7:45 AM CDT
- In force
- 8 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
County Monroe County, IL
The radar
The St Louis radar (KLSX), 70 km from the middle of the area, began a volume at 04:41 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 |
|---|---|---|---|
| Oct 20, 12:45 AM CDT | FLASH FLOOD | Valmeyer, IL | MONROE CITY CREEK FLOODED CLOSING NEARBY ROADS. BLUFF ROAD WAS ALSO CLOSED AT SEVERAL POINTS. |
| Oct 20, 6:01 AM CDT | HEAVY RAIN 3.75 | Waterloo, IL |
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, 4.7 hours before the alert went out and 245 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
- 1570 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- -54 m²/s²
- 0-3 km storm-relative helicity
- 331 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted.
431
WGUS53 KLSX 200439
FFWLSX
ILC133-201245-
/O.NEW.KLSX.FF.W.0052.161020T0439Z-161020T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1139 PM CDT WED OCT 19 2016
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
MONROE COUNTY IN SOUTHWESTERN ILLINOIS...
* UNTIL 745 AM CDT THURSDAY.
* AT 1138 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. 3 TO 4 INCHES OF RAINFALL HAVE
FALLEN IN BETWEEN A 2 AND 3 HOUR PERIOD. FLASH FLOODING IS
EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
WATERLOO...RED BUD...VALMEYER...FOUNTAIN...NEW DESIGN...HECKER...
MAEYSTOWN...HARRISONVILLE...WARTBURG...BURKSVILLE...
CHALFIN BRIDGE...MADONNAVILLE...FOSTER POND AND MONROE CITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.
PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.
&&
LAT...LON 3822 8990 3822 9003 3821 9004 3819 9034
3826 9037 3834 9037 3835 9036 3839 9012
3832 9004 3831 9004 3831 8997 3827 8992
3825 8992
$$
TES1 follow-up statement
406
WGUS73 KLSX 201230
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
730 AM CDT THU OCT 20 2016
ILC133-201238-
/O.CAN.KLSX.FF.W.0052.000000T0000Z-161020T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE IL-
730 AM CDT THU OCT 20 2016
...THE FLASH FLOOD WARNING FOR CENTRAL MONROE COUNTY IS CANCELLED...
THE HEAVY RAIN HAS ENDED. FLOOD WATERS HAVE RECEDED. FLOODING IS NO
LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ANY
REMAINING ROAD CLOSURES.
LAT...LON 3822 8990 3822 9003 3821 9004 3819 9034
3826 9037 3834 9037 3835 9036 3839 9012
3832 9004 3831 9004 3831 8997 3827 8992
3825 8992
$$
GKSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 19, 7:49 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 41 min |
| Oct 19, 11:20 PM CDT | Areal Flood Advisory | LSX | Monroe, Saint Clair | 4 hr |
| Oct 20, 12:22 AM CDT | Special Weather Statement | LSX | Macoupin | 38 min |
| Oct 20, 12:26 AM CDT | Special Weather Statement | LSX | Macoupin | 49 min |
| Oct 20, 4:08 AM CDT | Special Weather Statement | LSX | Madison | 52 min |
| Oct 20, 2:59 PM CDT | Frost Advisory | LSX | Adams, Brown, Pike | 17 hr |
Nearby
Flash Flood Warnings in Illinois, 2016Every flash flood warning in 2016
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.