Alert archive / Missouri / Flash Flood Warnings in 2021

Flash Flood Warning 26, NWS Kansas City, MO

June 28, 2021Bates County, Cass County, Missouri; Linn County, Kansas

NWS Kansas City, MO issued this flash flood warning at Jun 28, 2021, 1:50 PM CDT for Bates County, Cass County, Missouri; Linn County, Kansas. It was in force for 4 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 28, 2021, 1:50 PM CDT (18:50 UTC)
Expired: Jun 28, 2021, 5:45 PM CDT
In force: 4 hr
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Flood severity: None

Counties Linn County, KS, Bates County, MO, Cass County, MO

The radar

The Pleasant Hill radar (KEAX), 72 km from the middle of the area, began a volume at 18:49 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.

What was reported inside it

Time	Report	Where	Remark
Jun 28, 3:05 PM CDT	FLASH FLOOD	5 W Rich Hill, MO	REPORTS OF WATER OVER MULTIPLE SPOTS ON STATE ROUTE A WEST OF RICH HILL, MO.
Jun 28, 3:10 PM CDT	FLASH FLOOD	8 E Rich Hill, MO	WATER OVER ROUTE B HWY BETWEEN RICH HILL AND ROCKVILLE, MO.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 6.8 hours before the alert went out and 148 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: 83 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 990 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

334 
WGUS53 KEAX 281850
FFWEAX
KSC107-MOC013-037-282245-
/O.NEW.KEAX.FF.W.0026.210628T1850Z-210628T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
150 PM CDT Mon Jun 28 2021

The National Weather Service in Pleasant Hill MO has issued a

* Flash Flood Warning for...
  Southeastern Linn KS County in east central Kansas...
  Bates County in west central Missouri...
  Southeastern Cass County in west central Missouri...

* Until 545 PM CDT.

* At 150 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 2.5 inches of 
  rain have fallen. The expected rainfall rate is 2 to 4 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...
  Butler, Adrian, Garden City, Rich Hill, Pleasanton, Archie, 
  Creighton, Hume, Prescott, Amsterdam, Amoret, Foster, Passaic, 
  Ballard and Worland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3804 9469 3833 9470 3863 9412 3857 9412
      3857 9406 3822 9408 3805 9416 3804 9420
      3805 9420 3805 9421 3803 9423 3803 9424
      3805 9423 3805 9424 3806 9445 3806 9461
      3804 9461

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-4 INCHES IN 1 HOUR

$$

Kurtz

1 follow-up statement

496 
WGUS73 KEAX 281936
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
236 PM CDT Mon Jun 28 2021

KSC107-MOC013-037-282245-
/O.CON.KEAX.FF.W.0026.000000T0000Z-210628T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Linn KS KS-Bates MO-Cass MO-
236 PM CDT Mon Jun 28 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM CDT THIS 
AFTERNOON FOR SOUTHEASTERN LINN KS, BATES AND SOUTHEASTERN CASS 
COUNTIES...

At 236 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 2.5 and 5 inches of rain have 
fallen. The expected rainfall rate is 3 to 5 inches in 1 hour. 
Additional rainfall amounts of 2 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...
  Butler, Adrian, Garden City, Rich Hill, Pleasanton, Archie, 
  Creighton, Hume, Prescott, Amsterdam, Amoret, Foster, Passaic, 
  Ballard and Worland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3804 9469 3833 9470 3863 9412 3857 9412
      3857 9406 3822 9408 3805 9416 3804 9420
      3805 9420 3805 9421 3803 9423 3803 9424
      3805 9423 3805 9424 3806 9445 3806 9461
      3804 9461

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...3-5 INCHES IN 1 HOUR

$$

Kurtz

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 11:05 PM CDT	Special Weather Statement	EAX	Bates	40 min
Jun 28, 3:09 AM CDT	Flash Flood Watch	EAX	Adair, Bates, Caldwell, Carroll, Cass, Chariton and 17 more	3 days
Jun 28, 9:53 AM CDT	River Flood Warning	EAX	Johnson, Pettis	4 days
Jun 28, 11:18 AM CDT	Flash Flood Warning	EAX	Bates, Cass	6 hr
Jun 28, 12:51 PM CDT	River Flood Warning	EAX	Howard	15 hr
Jun 28, 1:39 PM CDT	River Flood Warning	EAX	Bates, Cass, Henry	4 days
Jun 28, 1:40 PM CDT	Special Weather Statement	EAX	Bates	50 min
Jun 28, 2:16 PM CDT	Special Weather Statement	EAX	Henry	59 min
Jun 28, 2:20 PM CDT	River Flood Warning	EAX	Bates	30 hr
Jun 28, 2:20 PM CDT	River Flood Warning	EAX	Linn	55 hr

Nearby

Flash Flood Warnings in Missouri, 2021 Flash Flood Warnings in Kansas, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.