Alert archive / Illinois / Flash Flood Warnings in 2018
Flash Flood Warning 10, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jun 10, 2018, 7:22 PM CDT for Montgomery County, Illinois. It was in force for 6 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
- Jun 10, 2018, 7:22 PM CDT (00:22 UTC)
- Expired
- Jun 11, 2018, 1:15 AM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
County Montgomery County, IL
The radar
The Lincoln radar (KILX), 95 km from the middle of the area, began a volume at 00:25 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 |
|---|---|---|---|
| Jun 10, 8:10 PM CDT | FLASH FLOOD | Nokomis, IL | STREET FLOODING WITH WATER TO THE BOTTOM OF CAR DOORS. |
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, 0.4 hours before the alert went out and 121 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
- 407 J/kg
- Mixed-layer CIN
- -200 J/kg
- Mixed-layer LCL
- 1018 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.8
The text
As transmitted.
416
WGUS53 KLSX 110022
FFWLSX
ILC135-110615-
/O.NEW.KLSX.FF.W.0010.180611T0022Z-180611T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
722 PM CDT SUN JUN 10 2018
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Central Montgomery County in south central Illinois...
* Until 115 AM CDT.
* At 722 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to three inches of rain have
already fallen. Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Hillsboro, Nokomis, Raymond, Witt, Coalton, Waggoner, Harvel,
Ohlman, Wenonah and Honey Bend.
This includes Interstate 55 in Illinois between exits 60 and 63.
This also includes Lake Lou Yaeger.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3923 8970 3938 8970 3938 8953 3935 8953
3935 8914 3922 8914
$$
Tilly2 follow-up statements
940
WGUS73 KLSX 110301
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
1001 PM CDT SUN JUN 10 2018
ILC135-110615-
/O.CON.KLSX.FF.W.0010.000000T0000Z-180611T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery IL-
1001 PM CDT SUN JUN 10 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR
CENTRAL MONTGOMERY COUNTY...
At 959 PM CDT, emergency management reported flash flooding in the
Nokomis area. Up to four inches of rain have already fallen. Flash
flooding is already occurring.
Some locations that will experience flooding include...
Hillsboro, Nokomis, Raymond, Witt, Coalton, Waggoner, Harvel, Ohlman,
Wenonah and Honey Bend.
This includes Interstate 55 in Illinois between exits 60 and 63.
This also includes Lake Lou Yaeger.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Please report flooding to your local law enforcement agency when you
can do so safely.
&&
LAT...LON 3923 8970 3938 8970 3938 8953 3935 8953
3935 8914 3922 8914
$$
Tilly470
WGUS73 KLSX 110613
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
113 AM CDT MON JUN 11 2018
ILC135-110623-
/O.EXP.KLSX.FF.W.0010.000000T0000Z-180611T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery IL-
113 AM CDT MON JUN 11 2018
...THE FLASH FLOOD WARNING FOR CENTRAL MONTGOMERY COUNTY WILL EXPIRE
AT 115 AM CDT...
Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3923 8970 3938 8970 3938 8953 3935 8953
3935 8914 3922 8914
$$
GKSThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 7:37 PM CDT | Special Weather Statement | LSX | Calhoun | 38 min |
| Jun 11, 3:45 PM CDT | Special Weather Statement | LSX | Greene | 45 min |
| Jun 11, 4:03 PM CDT | Tornado Warning | LSX | Calhoun, Greene, Pike | 27 min |
| Jun 11, 4:28 PM CDT | Severe Thunderstorm Warning | LSX | Greene | 47 min |
| Jun 11, 6:21 PM CDT | Special Weather Statement | LSX | Madison | 24 min |
Nearby
Flash Flood Warnings in Illinois, 2018Every flash flood warning in 2018
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.