Alert archive / Illinois / Flash Flood Warnings in 2020
Flash Flood Warning 33, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jun 30, 2020, 10:12 AM CDT for Fayette 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 30, 2020, 10:12 AM CDT (15:12 UTC)
- Expired
- Jun 30, 2020, 4:15 PM 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 Evansville,IN radar (KVWX), 138 km from the middle of the area, began a volume at 15:13 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 30, 12:45 PM CDT | HEAVY RAIN 5.2 | Vandalia, 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 12:00Z, 3.2 hours before the alert went out and 143 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
- 484 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 928 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
375
WGUS53 KLSX 301512
FFWLSX
ILC051-302115-
/O.NEW.KLSX.FF.W.0033.200630T1512Z-200630T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
1012 AM CDT Tue Jun 30 2020
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Southwestern Fayette County in south central Illinois...
* Until 415 PM CDT Tuesday.
* At 1011 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to three inches of rain have
already fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flooding include...
Vandalia, Shobonier, Shafter and Hagerstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3882 8899 3882 8919 3906 8925 3905 8897
FLASH FLOOD...RADAR INDICATED
$$
CVKING2 follow-up statements
694
WGUS73 KLSX 301858
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
158 PM CDT Tue Jun 30 2020
ILC051-302115-
/O.CON.KLSX.FF.W.0033.000000T0000Z-200630T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fayette IL-
158 PM CDT Tue Jun 30 2020
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM CDT TUESDAY
FOR SOUTHWESTERN FAYETTE COUNTY...
At 157 PM CDT, Doppler radar indicated the heaviest thunderstorms
have pushed south of the warned area. Up to three inches of rain
fell earlier today and flooding of low lying areas may continue for
a few hours before water recedes.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other drainage
and low lying areas.
Some locations that will experience flooding include...
Vandalia, Shobonier, Shafter and Hagerstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3882 8899 3882 8919 3906 8925 3905 8897
FLASH FLOOD...RADAR INDICATED
$$
CVKING529 WGUS73 KLSX 302111 FFSLSX Flash Flood Statement National Weather Service St Louis MO 411 PM CDT Tue Jun 30 2020 ILC051-302121- /O.EXP.KLSX.FF.W.0033.000000T0000Z-200630T2115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Fayette IL- 411 PM CDT Tue Jun 30 2020 ...THE FLASH FLOOD WARNING FOR SOUTHWESTERN FAYETTE COUNTY WILL EXPIRE AT 415 PM CDT TUESDAY... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 3882 8899 3882 8919 3906 8925 3905 8897 $$ Gosselin
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 11:14 PM CDT | Areal Flood Warning | LSX | Adams | 3 hr |
| Jun 30, 12:21 AM CDT | Flash Flood Warning | LSX | Adams, Pike | 6 hr |
| Jun 30, 1:34 AM CDT | Flash Flood Warning | LSX | Adams | 6 hr |
| Jun 30, 2:33 AM CDT | Areal Flood Advisory | LSX | Monroe, Saint Clair | 3 hr |
| Jun 30, 3:35 AM CDT | Flash Flood Warning | LSX | Pike | 6 hr |
| Jun 30, 4:21 AM CDT | Flash Flood Warning | LSX | Monroe, Saint Clair, Washington | 6 hr |
| Jun 30, 4:33 AM CDT | Flash Flood Warning | LSX | Adams | 6 hr |
| Jun 30, 5:15 AM CDT | Flash Flood Warning | LSX | Washington | 5 hr |
| Jun 30, 6:02 AM CDT | Flash Flood Warning | LSX | Adams | 6 hr |
| Jun 30, 6:13 AM CDT | Areal Flood Warning | LSX | Adams, Pike | 6 hr |
| Jun 30, 11:41 AM CDT | River Flood Warning | LSX | Adams | 53 hr |
| Jun 30, 11:41 AM CDT | River Flood Warning | LSX | Adams | 48 hr |
| Jun 30, 11:41 AM CDT | River Flood Warning | LSX | Pike | 66 hr |
| Jun 30, 11:41 AM CDT | River Flood Warning | LSX | Jersey | 6 days |
| Jun 30, 12:59 PM CDT | Areal Flood Advisory | LSX | Madison, Saint Clair | 3 hr |
| Jun 30, 4:49 PM CDT | Flash Flood Warning | LSX | Randolph | 5 hr |
Nearby
Flash Flood Warnings in Illinois, 2020Every flash flood warning in 2020
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.