Alert archive / Missouri / Flash Flood Warnings in 2021

Flash Flood Warning 30, NWS Kansas City, MO

June 30, 202111 counties in Missouri

NWS Kansas City, MO issued this flash flood warning at Jun 30, 2021, 4:50 PM CDT for 11 counties in Missouri. 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 30, 2021, 4:50 PM CDT (21:50 UTC)
Expired: Jun 30, 2021, 8:45 PM CDT
In force: 4 hr
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Flood severity: None

Counties Andrew County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Linn County, MO, Livingston County, MO, Nodaway County, MO, Sullivan County, MO

The radar

The Pleasant Hill radar (KEAX), 138 km from the middle of the area, began a volume at 21:52 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 30, 4:50 PM CDT	FLASH FLOOD	Gallatin, MO	LAW ENFORCEMENT REPORTS WATER OVER MULTIPLE ROADS IN THE CITY OF GALLATIN, MO. 2 INCHES OF RAIN IN THE LAST HOUR REPORTED.
Jun 30, 4:50 PM CDT	FLASH FLOOD	Jameson, MO	LAW ENFORCEMENT REPORTS WATER OVER THE ROAD AT HWY 13 AND HWY P.

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, 9.8 hours before the alert went out and 172 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: 247 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 653 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

975 
WGUS53 KEAX 302150
FFWEAX
MOC003-061-063-075-079-081-087-115-117-147-211-010145-
/O.NEW.KEAX.FF.W.0030.210630T2150Z-210701T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
450 PM CDT Wed Jun 30 2021

The National Weather Service in Pleasant Hill MO has issued a

* Flash Flood Warning for...
  Daviess County in north central Missouri...
  Grundy County in north central Missouri...
  Southern Harrison County in north central Missouri...
  Northern Linn MO County in north central Missouri...
  Northern Livingston County in north central Missouri...
  Southern Sullivan County in north central Missouri...
  Andrew County in northwestern Missouri...
  Northern DeKalb County in northwestern Missouri...
  Southern Gentry County in northwestern Missouri...
  East Central Holt County in northwestern Missouri...
  Southeastern Nodaway County in northwestern Missouri...

* Until 845 PM CDT.

* At 450 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. 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...
  Trenton, Savannah, Milan, Gallatin, King City, Jamesport, Union 
  Star, Gilman City, Pattonsburg, Linneus, Browning, Galt, Fillmore, 
  Chula, Altamont, Laredo, Purdin, Bolckow, Coffey and Rosendale.

This includes the following highways...
	Interstate 29 between mile markers 59 and 67.
	Interstate 35 in Missouri between mile markers 64 and 85.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4014 9505 4020 9286 3986 9285 3991 9501

FLASH FLOOD...RADAR INDICATED

$$

BT

1 follow-up statement

444 
WGUS73 KEAX 010140
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
840 PM CDT Wed Jun 30 2021

MOC003-061-063-075-079-081-087-115-117-147-211-010150-
/O.EXP.KEAX.FF.W.0030.000000T0000Z-210701T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Andrew MO-Daviess MO-DeKalb MO-Gentry MO-Grundy MO-Harrison MO-
Holt MO-Linn MO MO-Livingston MO-Nodaway MO-Sullivan MO-
840 PM CDT Wed Jun 30 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 845 PM CDT THIS EVENING FOR 
DAVIESS, GRUNDY, SOUTHERN HARRISON, NORTHERN LINN MO, NORTHERN 
LIVINGSTON, SOUTHERN SULLIVAN, ANDREW, NORTHERN DEKALB, SOUTHERN 
GENTRY, EAST CENTRAL HOLT AND SOUTHEASTERN NODAWAY COUNTIES...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

A Flash Flood Watch remains in effect until 700 AM CDT Thursday for 
Portions of east central Kansas. Portions of Missouri.

A Flash Flood Watch remains in effect until 700 AM CDT Thursday for 
Portions of Kansas. Portions of Missouri.

LAT...LON 4014 9505 4020 9286 3986 9285 3991 9501

$$

BT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 8:38 AM CDT	Flash Flood Warning	EAX	Clay, Jackson, Platte, Ray	4 hr
Jun 30, 9:06 AM CDT	River Flood Warning	EAX	Bates	59 hr
Jun 30, 10:28 AM CDT	River Flood Warning	EAX	Carroll, Lafayette, Saline	40 hr
Jun 30, 11:06 AM CDT	River Flood Warning	EAX	Jackson	3 hr
Jun 30, 11:06 AM CDT	River Flood Warning	EAX	Clay, Ray	9 hr
Jun 30, 12:04 PM CDT	Flash Flood Warning	EAX	Cass, Jackson, Johnson, Lafayette	4 hr
Jun 30, 12:22 PM CDT	Areal Flood Warning	EAX	Clay, Jackson, Platte	18 hr
Jun 30, 12:50 PM CDT	River Flood Warning	EAX	Linn, Livingston	34 hr
Jun 30, 2:12 PM CDT	River Flood Warning	EAX	Jackson	6 hr
Jun 30, 2:33 PM CDT	Flash Flood Warning	EAX	Bates, Cass, Henry, Johnson, Pettis	4 hr
Jun 30, 2:56 PM CDT	Special Weather Statement	EAX	Bates	49 min
Jun 30, 3:54 PM CDT	Areal Flood Warning	EAX	Cass, Jackson, Johnson, Lafayette	14 hr
Jun 30, 4:15 PM CDT	River Flood Warning	EAX	Jackson, Lafayette, Ray	49 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.