Alert archive / Missouri / Flash Flood Warnings in 2021

Flash Flood Warning 30, NWS Paducah, KY

July 10, 2021Scott County, Missouri; Alexander County, Illinois

NWS Paducah, KY issued this flash flood warning at Jul 10, 2021, 11:02 PM CDT for Scott County, Missouri; Alexander County, Illinois. It was in force for 5 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: Jul 10, 2021, 11:02 PM CDT (04:02 UTC)
Expired: Jul 11, 2021, 4:00 AM CDT
In force: 5 hr
Issued by: NWS Paducah, KY
Area: Storm-based polygon
Flood severity: None

Counties Alexander County, IL, Scott County, MO

The radar

The Paducah radar (KPAH), 77 km from the middle of the area, began a volume at 04:05 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 00:00Z, 4.0 hours before the alert went out and 259 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: 1010 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1462 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

As transmitted.

362 
WGUS53 KPAH 110402
FFWPAH
ILC003-MOC201-110900-
/O.NEW.KPAH.FF.W.0030.210711T0402Z-210711T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Paducah KY
1102 PM CDT Sat Jul 10 2021

The National Weather Service in Paducah has issued a

* Flash Flood Warning for...
  Southwestern Alexander County in southern Illinois...
  Scott County in southeastern Missouri...

* Until 400 AM CDT.

* At 1102 PM 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 2 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...
  Sikeston, Scott City, Chaffee, Oran, Benton, Morley, Kelso, 
  Hay-Wood City, Thebes, Vanduser, Blodgett, Commerce and Lambert.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3725 8949 3726 8948 3711 8936 3704 8935
      3687 8964 3706 8976 3709 8979 3710 8977
      3713 8977 3713 8976 3714 8976 3714 8972
      3716 8972 3716 8970 3718 8970 3718 8969
      3719 8969 3724 8957 3725 8954

FLASH FLOOD...RADAR INDICATED

$$

SMITH

1 follow-up statement

345 
WGUS73 KPAH 110853
FFSPAH

Flash Flood Statement
National Weather Service Paducah KY
Issued by National Weather Service Springfield MO
353 AM CDT Sun Jul 11 2021

ILC003-MOC201-110903-
/O.EXP.KPAH.FF.W.0030.000000T0000Z-210711T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Alexander IL-Scott MO-
353 AM CDT Sun Jul 11 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 4 AM CDT EARLY THIS MORNING 
FOR SOUTHWESTERN ALEXANDER AND SCOTT COUNTIES...

While some scattered showers will continue, flooding is no longer 
expected to pose a threat. Please continue to heed remaining road 
closures.

LAT...LON 3725 8949 3726 8948 3711 8936 3704 8935
      3687 8964 3706 8976 3709 8979 3710 8977
      3713 8977 3713 8976 3714 8976 3714 8972
      3716 8972 3716 8970 3718 8970 3718 8969
      3719 8969 3724 8957 3725 8954

$$

MB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 7:53 PM CDT	Severe Thunderstorm Warning	PAH	Stoddard	52 min
Jul 10, 8:16 PM CDT	Severe Thunderstorm Warning	PAH	Cape Girardeau, Scott	44 min
Jul 10, 8:23 PM CDT	Tornado Warning	PAH	Stoddard	52 min
Jul 10, 8:58 PM CDT	Severe Thunderstorm Warning	PAH	New Madrid	47 min
Jul 10, 9:22 PM CDT	Tornado Warning	PAH	New Madrid	38 min
Jul 10, 9:30 PM CDT	Severe Thunderstorm Warning	PAH	Carter, Ripley	45 min
Jul 10, 10:09 PM CDT	Special Weather Statement	PAH	Butler, Ripley	51 min
Jul 10, 10:29 PM CDT	Flash Flood Warning	PAH	Bollinger, Cape Girardeau	6 hr
Jul 10, 11:24 PM CDT	Special Weather Statement	PAH	Mississippi	51 min
Jul 10, 7:00 PM CDT	Special Weather Statement	PAH	Pope	45 min
Jul 10, 8:50 PM CDT	Special Weather Statement	PAH	Pulaski	25 min
Jul 10, 9:22 PM CDT	Special Weather Statement	PAH	Massac	38 min

Nearby

Flash Flood Warnings in Missouri, 2021 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; radar from the NEXRAD Level II archive.