Alert archive / Missouri / Flash Flood Warnings in 2021

Flash Flood Warning 9, NWS Paducah, KY

April 28, 2021Wayne County, Missouri

NWS Paducah, KY issued this flash flood warning at Apr 28, 2021, 2:04 PM CDT for Wayne County, Missouri. It was in force for 107 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: Apr 28, 2021, 2:04 PM CDT (19:04 UTC)
Expired: Apr 28, 2021, 3:51 PM CDT
In force: 107 min
Issued by: NWS Paducah, KY
Area: Storm-based polygon
Flood severity: None

County Wayne County, MO

The radar

The Paducah radar (KPAH), 154 km from the middle of the area, began a volume at 19:08 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

Little Rock, AR (KLZK), launched 12:00Z, 7.1 hours before the alert went out and 256 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: 845 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 593 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

827 
WGUS53 KPAH 281904
FFWPAH
MOC223-282200-
/O.NEW.KPAH.FF.W.0009.210428T1904Z-210428T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Paducah KY
204 PM CDT Wed Apr 28 2021

The National Weather Service in Paducah has issued a

* Flash Flood Warning for...
  Wayne County in southeastern Missouri...

* Until 500 PM CDT.

* At 204 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  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 flash flooding include...
  Piedmont, Greenville, Sam A. Baker State Park, Lake Wappapello 
  State Park, Williamsville, Lodi, Shook, Wappapello, Cascade and 
  Mill Spring.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3693 9069 3697 9070 3700 9073 3704 9073
      3704 9078 3714 9078 3714 9076 3717 9076
      3717 9074 3727 9074 3727 9055 3732 9055
      3731 9022 3709 9022 3709 9012 3704 9011
      3704 9015 3701 9015 3696 9022 3692 9024

FLASH FLOOD...RADAR INDICATED

$$

ML

1 follow-up statement

130 
WGUS73 KPAH 282051
FFSPAH

Flash Flood Statement
National Weather Service Paducah KY
351 PM CDT Wed Apr 28 2021

MOC223-282101-
/O.CAN.KPAH.FF.W.0009.000000T0000Z-210428T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne MO-
351 PM CDT Wed Apr 28 2021

...FLASH FLOOD WARNING IS CANCELLED FOR WAYNE COUNTY...

The imminent threat of heavy rain has ended. Please continue to heed 
remaining road closures.

A Flash Flood Watch remains in effect until 700 PM CDT Thursday for 
portions of southern Illinois...southwest Indiana...western Kentucky 
and southeast Missouri.

LAT...LON 3693 9069 3697 9070 3700 9073 3704 9073
      3704 9078 3714 9078 3714 9076 3717 9076
      3717 9074 3727 9074 3727 9055 3732 9055
      3731 9022 3709 9022 3709 9012 3704 9011
      3704 9015 3701 9015 3696 9022 3692 9024

$$

07

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 10:19 AM CDT	River Flood Warning	PAH	Wayne	23 hr
Apr 28, 12:35 PM CDT	Severe Thunderstorm Warning	PAH	Carter, Ripley	40 min
Apr 28, 1:14 PM CDT	Severe Thunderstorm Warning	PAH	Carter, Ripley	28 min
Apr 28, 1:32 PM CDT	Severe Thunderstorm Warning	PAH	Wayne	43 min
Apr 28, 2:15 PM CDT	Severe Thunderstorm Warning	PAH	Bollinger	45 min
Apr 28, 2:38 PM CDT	Flash Flood Warning	PAH	Butler, Ripley	117 min
Apr 28, 2:39 PM CDT	Special Weather Statement	PAH	Butler, Stoddard	51 min
Apr 28, 3:26 PM CDT	Special Weather Statement	PAH	Scott, Stoddard	49 min
Apr 28, 3:47 PM CDT	Severe Thunderstorm Warning	PAH	Cape Girardeau, Scott, Stoddard	28 min
Apr 28, 3:56 PM CDT	Severe Thunderstorm Warning	PAH	New Madrid, Scott, Stoddard	49 min
Apr 28, 4:10 PM CDT	Severe Thunderstorm Warning	PAH	Scott	30 min
Apr 28, 4:29 PM CDT	Special Weather Statement	PAH	Mississippi	46 min
Apr 28, 4:33 PM CDT	Flash Flood Warning	PAH	Mississippi, New Madrid	95 min
Apr 28, 4:55 PM CDT	Areal Flood Advisory	PAH	Mississippi	59 min

Nearby

Flash Flood Warnings in Missouri, 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; radar from the NEXRAD Level II archive.