Alert archive / Illinois / Flash Flood Warnings in 2021

Flash Flood Warning 46, NWS Paducah, KY

August 9, 2021Edwards County, Wabash County, Illinois

NWS Paducah, KY issued this flash flood warning at Aug 9, 2021, 5:28 AM CDT for Edwards County, Wabash 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, 5:28 AM CDT (10:28 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

Counties Edwards County, IL, Wabash County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 10.5 hours before the alert went out and 208 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2021-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2009 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2021-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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.

968 
WGUS53 KPAH 091028
FFWPAH
ILC047-185-091300-
/O.NEW.KPAH.FF.W.0046.210809T1028Z-210809T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Paducah has issued a

* Flash Flood Warning for...
  Edwards County in southeastern Illinois...
  Wabash County in southeastern Illinois...

* Until 800 AM CDT.

* At 528 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 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...
  Mount Carmel, Albion, Grayville, Lancaster, West Salem, Allendale, 
  Bellmont, Bone Gap, Keensburg and Browns.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3826 8815 3857 8815 3857 8767 3830 8791
      3829 8794 3827 8795 3826 8794 3826 8795

FLASH FLOOD...RADAR INDICATED

$$

PS
1 follow-up statement
134 
WGUS73 KPAH 091145
FFSPAH

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

ILC047-185-091300-
/O.CON.KPAH.FF.W.0046.000000T0000Z-210809T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Edwards IL-Wabash IL-
645 AM CDT Mon Aug 9 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING 
FOR EDWARDS AND WABASH COUNTIES...

At 645 AM CDT, Doppler radar indicated showers and thunderstorms 
producing heavy rain over southern Edwards and most of Wabash 
county. 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...
  Mount Carmel, Albion, Grayville, Lancaster, West Salem, Allendale, 
  Bellmont, Bone Gap, Keensburg and Browns.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3826 8815 3857 8815 3857 8767 3830 8791
      3829 8794 3827 8795 3826 8794 3826 8795

FLASH FLOOD...RADAR INDICATED

$$

PS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 4:56 AM CDTFlash Flood WarningPAHWayne3 hr
Aug 9, 8:19 AM CDTFlash Flood WarningPAHEdwards, Wayne2 hr
Aug 9, 1:53 PM CDTHeat AdvisoryPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more3 days

Nearby

Flash Flood Warnings in Illinois, 2021Every 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.