Alert archive / Kansas / Flash Flood Warnings in 2026
Flash Flood Warning 65, NWS Kansas City, MO
NWS Kansas City, MO issued this flash flood warning at Sep 15, 2026, 8:48 PM CDT for Johnson County, Wyandotte County, Kansas; Cass County, Jackson County, Missouri. It was in force for 4 hr. 5 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
- Sep 15, 2026, 8:48 PM CDT (01:48 UTC)
- Expired
- Sep 16, 2026, 1:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Johnson County, KS, Wyandotte County, KS, Cass County, MO, Jackson County, MO
The radar
The Pleasant Hill radar (KEAX), 36 km from the middle of the area, began a volume at 01:51 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 |
|---|---|---|---|
| Sep 15, 8:52 PM CDT | FLASH FLOOD | 1 W Raytown, MO | Report from mPING: Street/road flooding; Street/road closed; Vehicles stranded. |
| Sep 15, 8:55 PM CDT | FLASH FLOOD | 4 Nnw Raytown, MO | Water rescue in progress near Stadium Drive and Manchester Trafficway. |
| Sep 15, 9:00 PM CDT | FLASH FLOOD | 3 Wsw Maywood, MO | Social media reports of street flooding from Raytown to Independence. Time based on social media videos. |
| Sep 15, 9:04 PM CDT | FLOOD | 1 W Sugar Creek, MO | Report from mPING: River/Creek overflowing; Cropland/Yard/Basement Flooding. |
| Sep 15, 9:10 PM CDT | FLASH FLOOD | Raytown, MO | Several roads reported flooded in the Raytown area. Time estimated from radar. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 4 storm reports to this flash flood warning; the first came 4 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 1.8 hours before the alert went out and 98 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.
- Mixed-layer CAPE
- 111 J/kg
- Mixed-layer CIN
- -279 J/kg
- Mixed-layer LCL
- 728 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 243 m²/s²
- 0-3 km storm-relative helicity
- 369 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.2
The text
As transmitted.
284
WGUS53 KEAX 160148
FFWEAX
KSC091-209-MOC037-095-160600-
/O.NEW.KEAX.FF.W.0065.260916T0148Z-260916T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
848 PM CDT Tue Sep 15 2026
The National Weather Service in Pleasant Hill has issued a
* Flash Flood Warning for...
East Central Johnson County in east central Kansas...
East Central Wyandotte County in northeastern Kansas...
Northern Cass County in west central Missouri...
Western Jackson County in west central Missouri...
* Until 100 AM CDT.
* At 848 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 2.5 inches of
rain have fallen. Additional rainfall amounts of 0.5 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 indicated.
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...
Kansas City, Overland Park, Independence, Lee's Summit, Leawood,
Raytown, Grandview, Belton, Prairie Village, Fairway, Mission
Hills, Sugar Creek, Westwood, Westwood Hills, Mission Woods,
Roeland Park and Unity Village.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3884 9469 3911 9461 3911 9459 3913 9455
3914 9454 3915 9452 3915 9448 3913 9447
3912 9447 3912 9446 3914 9443 3915 9442
3915 9430 3883 9438
FLASH FLOOD...RADAR INDICATED
$$
CMS2 follow-up statements
971
WGUS73 KEAX 160251
FFSEAX
Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
951 PM CDT Tue Sep 15 2026
KSC091-209-MOC037-095-160600-
/O.CON.KEAX.FF.W.0065.000000T0000Z-260916T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Johnson KS-Wyandotte KS-Cass MO-Jackson MO-
951 PM CDT Tue Sep 15 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1 AM CDT WEDNESDAY FOR
EAST CENTRAL JOHNSON COUNTY IN EAST CENTRAL KANSAS, EAST CENTRAL
WYANDOTTE COUNTY IN NORTHEASTERN KANSAS AND NORTHERN CASS AND WESTERN
JACKSON COUNTIES IN WEST CENTRAL MISSOURI...
At 951 PM CDT, local law enforcement reported flooding in Raytown,
with several side roads flooded. Though the heavy rainfall has ended,
additional storms are possible later tonight, which may exacerbate
flooding. Flash flooding is already occurring.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Kansas City, Overland Park, Independence, Lee's Summit, Leawood,
Raytown, Grandview, Belton, Prairie Village, Fairway, Mission
Hills, Sugar Creek, Westwood, Westwood Hills, Mission Woods,
Roeland Park and Unity Village.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3884 9469 3911 9461 3911 9459 3913 9455
3914 9454 3915 9452 3915 9448 3913 9447
3912 9447 3912 9446 3914 9443 3915 9442
3915 9430 3883 9438
FLASH FLOOD...OBSERVED
$$
CMS079
WGUS73 KEAX 160556
FFSEAX
Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
1256 AM CDT Wed Sep 16 2026
KSC091-209-MOC037-095-160606-
/O.EXP.KEAX.FF.W.0065.000000T0000Z-260916T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Johnson KS-Wyandotte KS-Cass MO-Jackson MO-
1256 AM CDT Wed Sep 16 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 1 AM CDT EARLY THIS MORNING FOR
EAST CENTRAL JOHNSON COUNTY IN EAST CENTRAL KANSAS, EAST CENTRAL
WYANDOTTE COUNTY IN NORTHEASTERN KANSAS AND NORTHERN CASS AND WESTERN
JACKSON COUNTIES IN WEST CENTRAL MISSOURI...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flood Watch remains in effect until 100 PM CDT Wednesday for
portions of Kansas and west central Missouri.
&&
LAT...LON 3884 9469 3911 9461 3911 9459 3913 9455
3914 9454 3915 9452 3915 9448 3913 9447
3912 9447 3912 9446 3914 9443 3915 9442
3915 9430 3883 9438
$$
73What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Kansas City, MO wrote its last area forecast discussion before this flash flood warning went out at Sep 15, 7:02 PM CDT, 1 hour 46 minutes earlier. Its key messages:
- Multiple rounds of rainfall anticipated across NE KS and NW MO through tomorrow morning. Heavy downpours are expected which may lead to flash flooding as well as river flooding. A Flood Watch is in effect for NW MO and NE KS (including the KC metro) from 1PM Tuesday through 1PM Wednesday.
- Wide range of temperatures anticipated NW MO and NE KS around 80 and central MO in the mid 90s. There is the potential for some hazardous heat across central and southern MO and tomorrow and Thursday as heat index values approach 100F-105F.
- Additional rounds of storms area expected this weekend which may lead to additional flooding.
Area forecast discussion, Sep 15, 7:02 PM CDT, 1 hour 46 minutes before
Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
702 PM CDT Tue Sep 15 2026
.KEY MESSAGES...
- Multiple rounds of rainfall anticipated across NE KS and NW MO
through tomorrow morning. Heavy downpours are expected which
may lead to flash flooding as well as river flooding. A Flood
Watch is in effect for NW MO and NE KS (including the KC
metro) from 1PM Tuesday through 1PM Wednesday.
- Wide range of temperatures anticipated NW MO and NE KS around
80 and central MO in the mid 90s. There is the potential for
some hazardous heat across central and southern MO and
tomorrow and Thursday as heat index values approach
100F-105F.
- Additional rounds of storms area expected this weekend which
may lead to additional flooding.
&&
.DISCUSSION...
Issued at 231 PM CDT Tue Sep 15 2026
The main concern in the short term is the potential for heavy
rainfall late this afternoon through tomorrow morning potentially
leading to flash and river flooding. In addition there will be the
chance for a few strong storms late this afternoon through this
evening that will be capable of damaging winds and large hail. The
focus for these storms and the heavy rainfall will be a slow moving
cold frontal boundary. This boundary is slowly sagging into the
area, and is currently extending from Unionville to St Joseph early
this afternoon. This front is expected to continue to slowly sink
south through the afternoon. Light showers and cloud cover had
persisted north of this boundary creating an area of differential
heating where temperatures have achieved the low to mid 90s ahead of
the boundary and 70s north. The environment ahead of the front is
moderately unstable with MUCAPE values in the 2000-3000J/Kg range
however, the stronger effective shear lags behind the boundary. As
such, the main threat with strongest storms that develop late this
afternoon into the evening will be capable of localized damaging
winds and brief small hail. What is the biggest concern however, is
the threat for heavy rainfall that trains along and north of the
boundary this evening through the overnight. PWATs are near record
values Betteann 2.20"-2.40" so storms will be extremely efficient
with rainfall totals of 2-4" forecast for portions of northeastern
Kansas and NW Missouri. This will lead to a flood threat
particularly for areas of NE KS/NW MO that received 4-7" of rain
yesterday morning. As such a flood watch is in effect for these
areas through early tomorrow afternoon.
Storms are expected to continue through the overnight tonight fueled
by a southwesterly 30-35kt LLJ nosing into the area. The LLJ is
progged to weaken tomorrow morning allowing showers to dissipate.
Tomorrow afternoon into tomorrow morning the frontal boundary will
lift back north across the CWA as a warm front. Showers and
thunderstorms are expected with this feature as it lifts north with
the best chances for storms (25-35%) along and north of Highway 36
corridor. Highs tomorrow will range from the low to mid 90s south of
the Missouri River, where the warm front will pass earlier in the
day, to the mid 70s across northern Missouri where the warm front
won't lift through until tomorrow night. Thursday into Thursday
night looks to remain mostly dry and warm with the war front north
of the area. Highs will range from the mid 80s to mid 90s. Heat
index values south of the Missouri River may approach 105 degrees
with a heat advisory possibly being necessary.
The upper-level ridge will shift slightly back toward the south-
central US, drying things out briefly Friday morning and lifting
high temperatures into the 90s. However, this will be short-lived,
as an upper-level trough and surface cold front move into our region
Friday night into Saturday, bringing rain along the front. PWAT
values from the GFS range from 1.5-2.0 inches for Saturday and
Sunday, which fall in the 90th percentile for climatology. This, on
top of the rain we could see earlier in the week, may increase the
risk of flooding, especially in NW MO. By Monday, the cold front
moves out and high pressure moves in bringing cooler and drier
weather with highs in the 70s.
&&
.AVIATION /00Z TAFS THROUGH 00Z THURSDAY/...
Issued at 701 PM CDT Tue Sep 15 2026
An active night ahead with several rounds of showers and
thunderstorms posied to affect the region. First round of storms
currently affecting the terminals will move east by 2-3z. Cigs will
degrade overnight to MVFR/IFR thresholds as additional rounds of
showers and thunderstorms develop overnight. Some uncertainty exists
regarding the axis of highest thunderstorm potential, with STJ most
likely to experience prolonged IFR overnight. Have left TSRA out of
MCI/MKC after 08z, but may need to include at the next issuance.
Conditions will improve to VFR after 15-17z as thunderstorms move
out of the forecast area. NW winds around 7KT will shift westerly
around 6Z, then to SW around 19z.
&&
.EAX WATCHES/WARNINGS/ADVISORIES...
MO...Flood Watch through Wednesday afternoon for MOZ001>006-011>015-
020>022-028-029-037.
KS...Flood Watch through Wednesday afternoon for KSZ025-102>105.
&&
DISCUSSION...73
AVIATION...ShawHazardous weather outlook, Sep 15, 5:01 AM CDT, 15 hours 47 minutes before
Hazardous Weather Outlook National Weather Service Kansas City/Pleasant Hill MO 0501 AM CDT Tue Sep 15 2026 KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040- 043>046-053-054-161001- Atchison KS-Miami-Linn KS-Doniphan-Leavenworth-Wyandotte-Johnson KS- Atchison MO-Nodaway-Worth-Gentry-Harrison-Mercer-Putnam-Schuyler- Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-Adair-Buchanan-Clinton- Caldwell-Livingston-Linn MO-Macon-Platte-Clay-Ray-Carroll-Chariton- Randolph-Jackson-Lafayette-Saline-Howard-Cass-Johnson MO-Pettis- Cooper-Bates-Henry- 0501 AM CDT Tue Sep 15 2026 This hazardous weather outlook is for northwest...north central and west central Missouri...as well as extreme eastern Kansas. .DAY ONE...Through tonight. Please go to https://weather.gov/media/eax/DssPacket.pdf for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Please go to https://weather.gov/media/eax/DssPacket.pdf for more information on potential weather hazards. .KEY MESSAGES... - Multiple rounds of rainfall anticipated across NE KS and NW MO starting this morning and continuing through Wednesday morning. Heavy downpours are expected which may lead to flash flooding. A Flood Watch is in effect for NW MO and NE KS (including the KC metro) from 1PM Tuesday through 1PM Wednesday. - Runoff is expected to flow into creeks and streams resulting in elevated river levels and accelerated flow. Poor drainage and urban areas may also see some flooding. - Wide range of temperatures anticipated NW MO and NE KS around 80 and central MO in the mid 90s. There is the potential for some hazardous heat across central and southern MO today and tomorrow as heat index values approach 100F-105F.
In the hours before
Local storm report, Sep 15, 8:06 PM CDT, 42 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
806 PM CDT Tue Sep 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0706 PM Hail 5 W Cairo 39.52N 92.53W
09/15/2026 E1.75 Inch Randolph MO Public
Social media report. Time estimated from
radar.
&&
CMSLocal storm report, Sep 15, 8:19 PM CDT, 29 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
819 PM CDT Tue Sep 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 PM Hail 2 NE Country Club Villa 39.85N 94.80W
09/15/2026 E1.00 Inch Andrew MO Public
Social media report. Time estimated from
radar.
&&
CMSLocal storm report, Sep 15, 8:27 PM CDT, 21 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
827 PM CDT Tue Sep 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0746 PM Tstm Wnd Dmg 2 NNW Pleasant Hill 38.81N 94.28W
09/15/2026 Cass MO Utility Company
Several reports of wires down and power
outages northwest of Pleasant Hill. Time
estimated from radar.
&&
CMSLocal storm report, Sep 15, 8:29 PM CDT, 19 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
829 PM CDT Tue Sep 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0745 PM Tstm Wnd Dmg Greenwood 38.84N 94.34W
09/15/2026 Jackson MO Utility Company
Multiple reports of wires down and power
outages in the Greenwood area. Time
estimated from radar.
&&
CMSLocal storm report, Sep 15, 8:35 PM CDT, 13 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
835 PM CDT Tue Sep 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0744 PM Tstm Wnd Dmg Lake Winnebago 38.83N 94.36W
09/15/2026 Cass MO Fire Dept/Rescue
Reports of wires down in the Lake Winnebago
area. Time estimated from radar.
&&
CMSLocal storm report, Sep 15, 8:45 PM CDT, 3 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
845 PM CDT Tue Sep 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0550 PM Tstm Wnd Dmg 1 SE Richmond 39.27N 93.96W
09/15/2026 Ray MO Public
Downed trees reported at Shirkey Golf
Course. Time estimated from radar.
&&
CMSThe office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 7:49 PM CDT | Areal Flood Advisory | EAX | Johnson, Miami | 4 hr |
| Sep 15, 8:22 PM CDT | Areal Flood Advisory | EAX | Johnson, Wyandotte | 3 hr |
| Sep 16, 9:31 AM CDT | River Flood Warning | EAX | Atchison, Leavenworth | 22 hr |
| Sep 15, 7:09 PM CDT | Severe Thunderstorm Warning | EAX | Macon, Randolph | 38 min |
| Sep 15, 7:13 PM CDT | Areal Flood Advisory | EAX | Grundy, Harrison, Mercer | 4 hr |
| Sep 15, 7:15 PM CDT | Severe Thunderstorm Warning | EAX | Cass | 30 min |
| Sep 15, 7:36 PM CDT | Severe Thunderstorm Warning | EAX | Clinton, DeKalb | 22 min |
| Sep 15, 7:38 PM CDT | Severe Thunderstorm Warning | EAX | Caldwell, Daviess, Grundy, Linn, Livingston | 52 min |
| Sep 15, 7:45 PM CDT | Severe Thunderstorm Warning | EAX | Cass, Jackson | 30 min |
| Sep 15, 9:04 PM CDT | Areal Flood Advisory | EAX | Adair, Linn, Macon, Mercer, Putnam, Schuyler and 1 more | 5 hr |
| Sep 15, 10:41 PM CDT | River Flood Warning | EAX | Buchanan | 35 hr |
| Sep 15, 10:41 PM CDT | River Flood Warning | EAX | Platte | 5 days |
| Sep 15, 10:42 PM CDT | River Flood Warning | EAX | Platte | 6 days |
| Sep 15, 10:43 PM CDT | River Flood Warning | EAX | Daviess, Gentry | 61 hr |
| Sep 15, 10:44 PM CDT | River Flood Warning | EAX | Daviess, Livingston | 3 days |
| Sep 15, 10:44 PM CDT | River Flood Warning | EAX | Linn, Livingston | 3 days |
| Sep 15, 10:44 PM CDT | River Flood Warning | EAX | Carroll, Chariton, Linn, Livingston | 41 hr |
| Sep 15, 10:45 PM CDT | River Flood Warning | EAX | Carroll, Chariton | 5 days |
| Sep 16, 1:15 AM CDT | Areal Flood Advisory | EAX | Adair, Chariton, Grundy, Linn, Livingston, Macon and 4 more | 8 hr |
| Sep 16, 9:14 AM CDT | Areal Flood Warning | EAX | Adair, Chariton, Grundy, Linn, Livingston, Macon and 4 more | 6 hr |
Nearby
Flash Flood Warnings in Kansas, 2026Flash Flood Warnings in Missouri, 2026Every flash flood warning in 2026
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.