Alert archive / Illinois / Flash Flood Warnings in 2018
Flash Flood Warning 15, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jun 25, 2018, 8:01 PM CDT for Monroe County, Saint Clair County, Washington County, Illinois. It was in force for 6 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
- Jun 25, 2018, 8:01 PM CDT (01:01 UTC)
- Expired
- Jun 26, 2018, 2:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Monroe County, IL, Saint Clair County, IL, Washington County, IL
The radar
The St Louis radar (KLSX), 98 km from the middle of the area, began a volume at 01:04 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 25, 9:39 PM CDT | FLASH FLOOD | 1 S Marissa, IL | VEHICLE SUBMERGED ALONG ST. CLAIR AVENUE IN MARISSA AND DRIVER HAD TO BE RESCUED. |
| Jun 25, 10:46 PM CDT | FLASH FLOOD | 3 Ne Marissa, IL | A CULVERT OVERFLOWED AND WASHED OUT PORTIONS OF ERB ROAD NORTHEAST OF MARISSA. |
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, 1.0 hours before the alert went out and 227 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
- 216 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 1020 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 185 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
515 WGUS53 KLSX 260101 FFWLSX ILC133-163-189-260700- /O.NEW.KLSX.FF.W.0015.180626T0101Z-180626T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service St Louis MO 801 PM CDT MON JUN 25 2018 The National Weather Service in St Louis has issued a * Flash Flood Warning for... East central Monroe County in southwestern Illinois... Southwestern Washington County in south central Illinois... Southeastern St. Clair County in southwestern Illinois... * Until 200 AM CDT. * At 800 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to two inches of rain have already fallen and heavy rainfall continues to fall. Flash flooding is expected to begin shortly. * Some locations that will experience flooding include... Waterloo, Nashville, Smithton, New Athens, Marissa, Lively Grove, St. Libory, Lenzburg, Hecker, Fayetteville, Oakdale, Floraville, Cordes, Elkton, Paderborn and Stone Church. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, country roads, farmland, and other low lying spots. && LAT...LON 3822 8939 3824 9009 3838 9017 3837 8938 $$ KD
1 follow-up statement
753 WGUS73 KLSX 260242 FFSLSX Flash Flood Statement National Weather Service St Louis MO 942 PM CDT MON JUN 25 2018 ILC133-163-189-260700- /O.CON.KLSX.FF.W.0015.000000T0000Z-180626T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Monroe IL-Washington IL-St. Clair IL- 942 PM CDT MON JUN 25 2018 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 AM CDT FOR EAST CENTRAL MONROE...SOUTHWESTERN WASHINGTON AND SOUTHEASTERN ST. CLAIR COUNTIES... At 941 PM CDT, local law enforcement reported flash flooding due to previous thunderstorms. Up to four inches of rain have fallen. Flash flooding is ongoing. Some locations that will experience flooding include... Waterloo, Nashville, Smithton, New Athens, Marissa, Lively Grove, St. Libory, Lenzburg, Hecker, Fayetteville, Oakdale, Floraville, Cordes, Elkton, Paderborn and Stone Church. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, country roads, farmland, and other low lying spots. && LAT...LON 3822 8939 3824 9009 3838 9017 3837 8938 $$ KD
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 25, 7:48 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 42 min |
| Jun 26, 5:34 AM CDT | Severe Thunderstorm Warning | LSX | Monroe | 26 min |
| Jun 26, 6:15 AM CDT | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion | 22 min |
| Jun 26, 8:43 AM CDT | Special Weather Statement | LSX | Marion | 47 min |
| Jun 26, 9:47 AM CDT | Areal Flood Advisory | LSX | Clinton, Marion | 3 hr |
| Jun 26, 11:22 AM CDT | River Flood Warning | LSX | Calhoun, Greene, Jersey | 14 days |
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.