Alert archive / Illinois / Flash Flood Warnings in 2021

Flash Flood Warning 36, NWS Paducah, KY

July 16, 2021Hamilton County, Wayne County, White County, Illinois

NWS Paducah, KY issued this flash flood warning at Jul 16, 2021, 2:04 PM CDT for Hamilton County, Wayne County, White County, Illinois. It was in force for 116 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 16, 2021, 2:04 PM CDT (19:04 UTC)
Expired
Jul 16, 2021, 4:00 PM CDT
In force
116 min
Issued by
NWS Paducah, KY
Area
Storm-based polygon
Flood severity
None

Counties Hamilton County, IL, Wayne County, IL, White County, IL

The radar

The Evansville,IN radar (KVWX), 50 km from the middle of the area, began a volume at 19:04 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.1 hours before the alert went out and 213 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 12:00Z on 2021-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 139 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2021-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.193958Sfc1 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
139 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
541 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

574 
WGUS53 KPAH 161904
FFWPAH
ILC065-191-193-162100-
/O.NEW.KPAH.FF.W.0036.210716T1904Z-210716T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Paducah KY
204 PM CDT Fri Jul 16 2021

The National Weather Service in Paducah has issued a

* Flash Flood Warning for...
  Northeastern Hamilton County in south central Illinois...
  Southeastern Wayne County in south central Illinois...
  Northwestern White County in southeastern Illinois...

* Until 400 PM CDT.

* At 204 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. The expected rainfall rate is 1 
  to 2 inches in 1 hour. Additional rainfall amounts up to 1 inch 
  are possible in the warned area. Localized higher totals are 
  possible. Flash flooding is expected to begin shortly. This same 
  cluster of storms produced flash flooding earlier as it moved 
  through Benton and Macedonia.

  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, Mcleansboro, Enfield, Mill Shoals, Springerton, Golden 
  Gate, Belle Prairie City and Burnt Prairie.

This includes the following highways...
	Interstate 64 in Illinois between Mile Markers 99 and 121.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3833 8855 3845 8815 3832 8815 3831 8815
      3829 8815 3828 8815 3827 8815 3826 8815
      3813 8815 3801 8861 3803 8861

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

07
1 follow-up statement
759 
WGUS73 KPAH 161941
FFSPAH

Flash Flood Statement
National Weather Service Paducah KY
241 PM CDT Fri Jul 16 2021

ILC065-191-193-162100-
/O.CON.KPAH.FF.W.0036.000000T0000Z-210716T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hamilton IL-Wayne IL-White IL-
241 PM CDT Fri Jul 16 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 4 PM CDT THIS 
AFTERNOON FOR NORTHEASTERN HAMILTON, SOUTHEASTERN WAYNE AND 
NORTHWESTERN WHITE COUNTIES...

At 241 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain had mostly moved across the warned area. However, additional 
nearby thunderstorms may yield more rainfall, some of it heavy, 
overtop already heavy rain fallen. Expected rainfall rates in these 
storms remains 1 to 2 inches in 1 hour, so additional rainfall 
amounts up to 1 inch are possible in the warned area.

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, Mcleansboro, Enfield, Mill Shoals, Springerton, Golden 
  Gate, Belle Prairie City and Burnt Prairie.

This includes the following highways...
	Interstate 64 in Illinois between Mile Markers 99 and 121.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3833 8855 3845 8815 3832 8815 3831 8815
      3829 8815 3828 8815 3827 8815 3826 8815
      3813 8815 3801 8861 3803 8861

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

07

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 10:01 PM CDTSpecial Weather StatementPAHFranklin, Williamson44 min
Jul 15, 11:11 PM CDTAreal Flood AdvisoryPAHPerry17 min
Jul 15, 11:28 PM CDTFlash Flood WarningPAHPerry3 hr
Jul 16, 1:09 AM CDTFlash Flood WarningPAHFranklin, Jefferson6 hr
Jul 16, 2:19 AM CDTFlash Flood WarningPAHPerry6 hr
Jul 16, 6:23 AM CDTFlash Flood WarningPAHJefferson6 hr
Jul 16, 7:52 AM CDTAreal Flood AdvisoryPAHJefferson, Saline4 min
Jul 16, 8:11 AM CDTAreal Flood AdvisoryPAHJefferson110 min
Jul 16, 12:14 PM CDTSpecial Weather StatementPAHJefferson46 min
Jul 16, 12:43 PM CDTAreal Flood AdvisoryPAHFranklin, Hamilton, Jefferson, Wayne2 hr
Jul 16, 12:58 PM CDTSpecial Weather StatementPAHHamilton47 min
Jul 16, 1:21 PM CDTFlash Flood WarningPAHFranklin, Hamilton, Jefferson114 min
Jul 16, 1:50 PM CDTAreal Flood AdvisoryPAHEdwards, Wabash115 min
Jul 16, 2:17 PM CDTFlash Flood WarningPAHEdwards, Wabash, White118 min
Jul 16, 2:28 PM CDTAreal Flood AdvisoryPAHJackson, Perry3 hr
Jul 16, 3:16 PM CDTAreal Flood AdvisoryPAHFranklin, Hamilton, Jefferson, Wayne3 hr
Jul 16, 3:25 PM CDTFlash Flood WarningPAHFranklin, Jackson, Jefferson, Perry3 hr
Jul 16, 4:04 PM CDTFlash Flood Warning Considerable damage threatPAHPerry2 hr
Jul 16, 4:28 PM CDTFlash Flood WarningPAHFranklin, Hamilton, Wayne3 hr
Jul 16, 4:46 PM CDTAreal Flood AdvisoryPAHJackson, Saline, Williamson119 min
Jul 16, 4:59 PM CDTFlash Flood WarningPAHEdwards, Wabash, White3 hr
Jul 16, 6:12 PM CDTAreal Flood WarningPAHPerry13 hr

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; radar from the NEXRAD Level II archive.