Alert archive / Missouri / Flash Flood Warnings in 2021

Flash Flood Warning 10, NWS Kansas City, MO

June 20, 2021Chariton County, Howard County, Missouri

NWS Kansas City, MO issued this flash flood warning at Jun 20, 2021, 12:01 AM CDT for Chariton County, Howard County, Missouri. It was in force for 7 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: Jun 20, 2021, 12:01 AM CDT (05:01 UTC)
Expired: Jun 20, 2021, 7:00 AM CDT
In force: 7 hr
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Flood severity: None

Counties Chariton County, MO, Howard County, MO

The radar

The Pleasant Hill radar (KEAX), 135 km from the middle of the area, began a volume at 05:05 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

Topeka, KS (KTOP), launched 00:00Z, 5.0 hours before the alert went out and 246 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: 2221 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 2018 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.8

Open this sounding in Storm Lab

The text

As transmitted.

901 
WGUS53 KEAX 200501
FFWEAX
MOC041-089-201100-
/O.NEW.KEAX.FF.W.0010.210620T0501Z-210620T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
1201 AM CDT Sun Jun 20 2021

The National Weather Service in Pleasant Hill MO has issued a

* Flash Flood Warning for...
  Northern Howard County in central Missouri...
  Southeastern Chariton County in north central Missouri...

* Until 600 AM CDT.

* At 1201 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2.5 and 4 inches of 
  rain have fallen. The expected rainfall rate is 1.5 to 2.5 inches 
  in 1 hour. Additional rainfall amounts of 1.5 to 2.5 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...
  Fayette, Glasgow and Armstrong.

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.

&&

LAT...LON 3927 9295 3936 9292 3937 9283 3933 9271
      3932 9271 3925 9243 3908 9252 3914 9266
      3919 9287 3920 9286 3923 9285 3922 9292
      3924 9293 3926 9292

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1.5-2.5 INCHES IN 1 HOUR

$$

Kurtz

3 follow-up statements

149 
WGUS73 KEAX 200608
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
108 AM CDT Sun Jun 20 2021

MOC041-089-201100-
/O.CON.KEAX.FF.W.0010.000000T0000Z-210620T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chariton MO-Howard MO-
108 AM CDT Sun Jun 20 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 AM CDT EARLY THIS 
MORNING FOR NORTHERN HOWARD AND SOUTHEASTERN CHARITON COUNTIES...

At 108 AM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 4 and 6 inches of rain have 
fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. 
Additional rainfall amounts of 1.5 to 2.5 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...
  Fayette, Glasgow and Armstrong.

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.

&&

LAT...LON 3927 9295 3936 9292 3937 9283 3933 9271
      3932 9271 3925 9243 3908 9252 3914 9266
      3919 9287 3920 9286 3923 9285 3922 9292
      3924 9293 3926 9292

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

$$

Kurtz

004 
WGUS53 KEAX 200743
FFWEAX
MOC041-089-201200-
/O.EXT.KEAX.FF.W.0010.000000T0000Z-210620T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
243 AM CDT Sun Jun 20 2021

The National Weather Service in Pleasant Hill MO has extended the

* Flash Flood Warning for...
  Northern Howard County in central Missouri...
  Southeastern Chariton County in north central Missouri...

* Until 700 AM CDT.

* At 243 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 4 and 7 inches of rain 
  have fallen. The expected rainfall rate is 1 to 1.5 inches in 1 
  hour. Additional rainfall amounts of 1 to 1.5 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...
  Fayette, Glasgow and Armstrong.

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.

&&

LAT...LON 3927 9295 3936 9292 3937 9283 3933 9271
      3932 9271 3925 9243 3908 9252 3914 9266
      3919 9287 3920 9286 3923 9285 3922 9292
      3924 9293 3926 9292

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-1.5 INCHES IN 1 HOUR

$$

Kurtz

605 
WGUS73 KEAX 201157
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
657 AM CDT Sun Jun 20 2021

MOC041-089-201207-
/O.EXP.KEAX.FF.W.0010.000000T0000Z-210620T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chariton MO-Howard MO-
657 AM CDT Sun Jun 20 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 7 AM CDT THIS MORNING FOR 
NORTHERN HOWARD AND SOUTHEASTERN CHARITON COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3927 9295 3936 9292 3937 9283 3933 9271
      3932 9271 3925 9243 3908 9252 3914 9266
      3919 9287 3920 9286 3923 9285 3922 9292
      3924 9293 3926 9292

$$

Leighton

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 19, 7:42 PM CDT	Severe Thunderstorm Warning	EAX	Randolph	33 min
Jun 19, 8:13 PM CDT	Special Weather Statement	EAX	Randolph	47 min
Jun 19, 8:28 PM CDT	Severe Thunderstorm Warning	EAX	Randolph	32 min
Jun 19, 8:57 PM CDT	Special Weather Statement	EAX	Randolph	48 min
Jun 19, 9:09 PM CDT	Flash Flood Warning	EAX	Howard, Randolph	5 hr
Jun 19, 9:25 PM CDT	Severe Thunderstorm Warning	EAX	Randolph	35 min
Jun 19, 9:28 PM CDT	Special Weather Statement	EAX	Macon	47 min
Jun 19, 9:33 PM CDT	Areal Flood Advisory	EAX	Adair, Macon	6 hr
Jun 19, 9:40 PM CDT	Severe Thunderstorm Warning	EAX	Chariton, Howard, Randolph	35 min
Jun 19, 9:58 PM CDT	Severe Thunderstorm Warning	EAX	Adair, Macon	32 min
Jun 19, 10:33 PM CDT	Severe Thunderstorm Warning	EAX	Chariton	27 min
Jun 19, 10:56 PM CDT	Special Weather Statement	EAX	Chariton	49 min
Jun 19, 11:08 PM CDT	Severe Thunderstorm Warning	EAX	Carroll, Chariton, Livingston	37 min
Jun 19, 11:32 PM CDT	Areal Flood Advisory	EAX	Carroll, Chariton, Howard, Livingston	6 hr
Jun 19, 11:44 PM CDT	Special Weather Statement	EAX	Chariton	46 min
Jun 20, 2:30 AM CDT	Areal Flood Warning	EAX	Randolph	3 hr
Jun 20, 3:34 AM CDT	Special Weather Statement	EAX	Gentry, Nodaway	41 min
Jun 20, 8:34 AM CDT	Special Weather Statement	EAX	Sullivan	41 min
Jun 20, 9:10 AM CDT	Special Weather Statement	EAX	Adair	50 min
Jun 20, 11:26 AM CDT	Special Weather Statement	EAX	Randolph	34 min
Jun 20, 6:07 PM CDT	Special Weather Statement	EAX	Andrew	38 min
Jun 20, 6:24 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, DeKalb	36 min
Jun 20, 6:52 PM CDT	Severe Thunderstorm Warning	EAX	Harrison, Mercer, Putnam, Sullivan	23 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.