Alert archive / Illinois / Flash Flood Warnings in 2021

Flash Flood Warning 45, NWS Paducah, KY

August 9, 2021Wayne County, Illinois

NWS Paducah, KY issued this flash flood warning at Aug 9, 2021, 4:56 AM CDT for Wayne County, Illinois. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 9, 2021, 4:56 AM CDT (09:56 UTC)
Expired: Aug 9, 2021, 8:00 AM CDT
In force: 3 hr
Issued by: NWS Paducah, KY
Area: Storm-based polygon
Flood severity: None

County Wayne County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 9.9 hours before the alert went out and 188 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2009 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1044 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted.

060 
WGUS53 KPAH 090956
FFWPAH
ILC191-091300-
/O.NEW.KPAH.FF.W.0045.210809T0956Z-210809T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Paducah KY
456 AM CDT Mon Aug 9 2021

The National Weather Service in Paducah has issued a

* Flash Flood Warning for...
  Wayne County in south central Illinois...

* Until 800 AM CDT.

* At 456 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 3 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Fairfield, Wayne City, Cisne, Jeffersonville, Sims, Mount Erie, 
  Keenes, Johnsonville and Golden Gate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3851 8868 3860 8870 3860 8815 3826 8815
      3826 8869

FLASH FLOOD...RADAR INDICATED

$$

PS

1 follow-up statement

891 
WGUS73 KPAH 091105
FFSPAH

Flash Flood Statement
National Weather Service Paducah KY
605 AM CDT Mon Aug 9 2021

ILC191-091300-
/O.CON.KPAH.FF.W.0045.000000T0000Z-210809T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne IL-
605 AM CDT Mon Aug 9 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING 
FOR WAYNE COUNTY...

At 605 AM CDT, Doppler radar indicated thunderstorms producing heavy 
rain in eastern Wayne county. Although the rain is coming to an end, 
flooding could still be occurring, especially over the northern half 
of the county. Some additional shower development is possible. 
Between 1 and 4 inches of rain have fallen. Additional rainfall 
amounts up to 1 inch are possible in the warned area. Flash flooding 
is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Fairfield, Wayne City, Cisne, Jeffersonville, Sims, Mount Erie, 
  Keenes, Johnsonville and Golden Gate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3851 8868 3860 8870 3860 8815 3826 8815
      3826 8869

FLASH FLOOD...RADAR INDICATED

$$

PS

The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 5:28 AM CDT	Flash Flood Warning	PAH	Edwards, Wabash	3 hr
Aug 9, 8:19 AM CDT	Flash Flood Warning	PAH	Edwards, Wayne	2 hr
Aug 9, 1:53 PM CDT	Heat Advisory	PAH	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	3 days

Nearby

Flash Flood Warnings in Illinois, 2021 Every flash flood warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.