Alert archive / Missouri / Flash Flood Warnings in 2026
Flash Flood Warning 45, NWS Kansas City, MO
NWS Kansas City, MO issued this flash flood warning at Jul 4, 2026, 12:51 PM CDT for Cass County, Henry County, Johnson County, Missouri. It was in force for 3 hr. 3 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
- Jul 4, 2026, 12:51 PM CDT (17:51 UTC)
- Expired
- Jul 4, 2026, 4:02 PM CDT
- In force
- 3 hr
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cass County, MO, Henry County, MO, Johnson County, MO
The radar
The Pleasant Hill radar (KEAX), 35 km from the middle of the area, began a volume at 17:55 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 |
|---|---|---|---|
| Jul 4, 1:00 PM CDT | FLASH FLOOD | 2 Ese Harrisonville, MO | Report of street flooding and debris across the road east of Harrisonville. Time estimated from radar. |
| Jul 4, 1:15 PM CDT | FLASH FLOOD | 3 Ese Harrisonville, MO | Street flooding reported on county and rural roads east of Harrisonville. Time based on social media report. |
| Jul 4, 1:24 PM CDT | FLASH FLOOD | 3 Sse Warrensburg, MO | Downed trees in several locations southeast of Warrensburg. 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 3 storm reports to this flash flood warning; the first came 9 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 12:00Z, 5.9 hours before the alert went out and 156 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
- 264 J/kg
- Mixed-layer CIN
- -286 J/kg
- Mixed-layer LCL
- 1308 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 136 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
The text
As transmitted.
599
WGUS53 KEAX 041751
FFWEAX
MOC037-083-101-042200-
/O.NEW.KEAX.FF.W.0045.260704T1751Z-260704T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
1251 PM CDT Sat Jul 4 2026
The National Weather Service in Pleasant Hill has issued a
* Flash Flood Warning for...
Eastern Cass County in west central Missouri...
Northern Henry County in west central Missouri...
Johnson County in west central Missouri...
* Until 500 PM CDT.
* At 1251 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to 1.5 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 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...
Warrensburg, Harrisonville, Pleasant Hill, Windsor, Knob Noster,
Holden, Garden City, Whiteman Air Force Base, Leeton, Calhoun,
Creighton, Chilhowee, East Lynne, Kingsville, Baldwin Park,
Whiteman Afb, Centerview and Strasburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3847 9432 3884 9435 3883 9412 3887 9412
3891 9350 3890 9350 3890 9349 3865 9351
3847 9351
FLASH FLOOD...RADAR INDICATED
$$
CMS2 follow-up statements
656
WGUS73 KEAX 041859
FFSEAX
Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
159 PM CDT Sat Jul 4 2026
MOC037-083-101-042200-
/O.CON.KEAX.FF.W.0045.000000T0000Z-260704T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cass MO-Henry MO-Johnson MO-
159 PM CDT Sat Jul 4 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM CDT THIS
AFTERNOON FOR EASTERN CASS, NORTHERN HENRY AND JOHNSON COUNTIES IN
WEST CENTRAL MISSOURI...
At 159 PM CDT, the public reported flash flooding in the
Harrisonville area. Between 1 and 2 inches of rain have fallen. Flash
flooding is already occurring.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Public reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Warrensburg, Harrisonville, Pleasant Hill, Windsor, Knob Noster,
Holden, Garden City, Whiteman Air Force Base, Leeton, Calhoun,
Creighton, Chilhowee, East Lynne, Kingsville, Baldwin Park,
Whiteman Afb, Centerview and Strasburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3847 9432 3884 9435 3883 9412 3887 9412
3891 9350 3890 9350 3890 9349 3865 9351
3847 9351
FLASH FLOOD...OBSERVED
$$
CMS230
WGUS73 KEAX 042102
FFSEAX
Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
402 PM CDT Sat Jul 4 2026
MOC037-083-101-042112-
/O.CAN.KEAX.FF.W.0045.000000T0000Z-260704T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cass MO-Henry MO-Johnson MO-
402 PM CDT Sat Jul 4 2026
...FLASH FLOOD WARNING IS CANCELLED FOR EASTERN CASS, NORTHERN HENRY
AND JOHNSON COUNTIES IN WEST CENTRAL MISSOURI...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
&&
LAT...LON 3847 9432 3884 9435 3883 9412 3887 9412
3891 9350 3890 9350 3890 9349 3865 9351
3847 9351
$$
CMSWhat 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 Jul 4, 12:46 PM CDT, 5 minutes earlier. Its key messages:
- Thunderstorms, showers and cloud cover has minimized the potential for maximum temperatures to rise above mid to upper 80s across the area.
- Shower and thunderstorm activity through the early afternoon has reduced potential impacts on afternoon/evening activity. Confidence remains low (20-30%) in exact evolution of afternoon activity after 3pm.
Area forecast discussion, Jul 4, 12:46 PM CDT, 5 minutes before
Area Forecast Discussion National Weather Service Kansas City/Pleasant Hill MO 1246 PM CDT Sat Jul 4 2026 .KEY MESSAGES... - Thunderstorms, showers and cloud cover has minimized the potential for maximum temperatures to rise above mid to upper 80s across the area. - Shower and thunderstorm activity through the early afternoon has reduced potential impacts on afternoon/evening activity. Confidence remains low (20-30%) in exact evolution of afternoon activity after 3pm. && .DISCUSSION... Issued at 359 AM CDT Sat Jul 4 2026 Thunderstorms from the previous few hours continues to decay as it traverses out of our forecast area, with new storms over southeastern Nebraska and northern Kansas trailing behind. This complex of storms is expected to continue pushing southeastward through the remaining overnight hours into the morning as it follows along mean atmospheric flow, with additional activity spurred on by broad scale synoptic forcing through an upper- level trough and associated vort maxima presently located over southeast Nebraska. As it stands, most of this activity is elevated, with stable low layers due to cold pooling and a bulk of CAPE residing in the mixed layer. Thus, anticipated severe impacts with these storms remains low confidence, with the greatest hazards being heavy rainfall and strong winds gusts as storms collapse. Similar to yesterday, determining forecast impacts during the day will depend a lot on real-time environmental analysis. CAMs continue to perform poorly when it comes to resolving current activity, and as such confidence remains low in any solutions they provide to guide the forecast process. Utilizing what we know about the current synoptic/mesoscale environment, it is plausible that activity continues to our northwest through the morning and early afternoon. At present, weak dCVA associated with the shortwave will prompt it to slowly lift towards the east/northeast through the next few hours. As the shortwave lingers, continued convective activity will spark along weak synoptic lifting from this area of dCVA. Current radar reflectivity shows activity developing generally from southeast Nebraska into northern Kansas, which supports this idea. This convection, as it continues to evolve through the night, could lead to continued impacts across the forecast area through the morning by way of ongoing convection or new activity firing off along remnant outflow boundaries. Whatever ends up being the case, the presence of these showers/storms could impact the timing of showers/storms later in the afternoon/evening. If activity lingers, it could keep our chances for precipitation lower during the afternoon as the atmosphere won't have too much opportunity to heat up and eventually destabilize. However, if this activity clears out relatively quick and the atmosphere is allowed to destabilize earlier, chances are greater in seeing pulse thunderstorms across the area through the afternoon, which could create a greater coverage of activity through subsequent outflow boundaries as they build up and quickly collapse. Another caveat to consider will be the continued effects of the shortwave as it lifts away from our area. Looking at the broader synoptic scale, this shortwave appears to drape a boundary down across our forecast area during the evening/overnight hours. This will be a greater forcing mechanism for showers/storms, and thus confidence is higher in the potential for precipitation along this boundary. However, there is still some disagreement between guidance on when this boundary will cross over our forecast area, either placing it as early as sunset or a few hours later in the night. At the synoptic scale, there is a better chance for models to resolve and agree on this relative to mesoscale features, so the forecast ahead will have to monitor this trend to see if that occurs. With this activity, severe potential remains lower, with lower effective shear keeping storms less organized despite ample instability and weak overall forcing. With strong storms, you could expect to see gusty winds. Activity will clear out going into Sunday, and "cooler" temperatures will follow with the passage of the boundary. However, going into next week, temperatures look to rise once again with an amplified ridge building over our area through the early week. However, unlike this previous week, lower dewpoints will keep much of our forecast area below triple digit heat indices. Deterministic guidance keeps our area drier through this early week timeframe, before PoPs increase going into the later half of next week. However, at this timeframe, greater deviation in deterministic solutions of the synoptic scale remains evident, and as such confidence remains lower on whether this will actually pan out. && .AVIATION /18Z TAFS THROUGH 18Z SUNDAY/... Issued at 1230 PM CDT Sat Jul 4 2026 The activity from KS moving east through the morning has become more organized as it moves across the area primarily impacting many of TAF site location, particularly from KMKC and KIXD as the stronger thunderstorms with lightning having been moving through KIXD and southward over the past hour. While confidence in KSTJ with -TSRA and kept them in prob30 but there could be a potential. However kept the tempo groups in from 18z-20z for the KMCI, KMKC and KIXD, especially as this initial line moves through. I have kept a prob30 for these locations from 20z-23z as the storms moving along and south of KMHK continue to move east. Guidance did not resolve the activity well, but expect these showers to continue through TAFs sites through 23z. Have lower confidence in the development from 20-23z especially after the the storms shift east of the TAF sites this by 20z. Expect visibility to improve with VFR after 00z. && .EAX WATCHES/WARNINGS/ADVISORIES... MO...None. KS...None. && DISCUSSION...SPG SHORT TERM...WFO EAX LONG TERM...WFO EAX AVIATION...WFO EAX
Hazardous weather outlook, Jul 4, 5:04 AM CDT, 7 hours 47 minutes before
Hazardous Weather Outlook National Weather Service Kansas City/Pleasant Hill MO 0504 AM CDT Sat Jul 04 2026 KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040- 043>046-053-054-051004- 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- 0504 AM CDT Sat Jul 04 2026 This hazardous weather outlook is for northwest...north central and west central Missouri...as well as extreme eastern Kansas. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Sunday through Friday. The probability for widespread hazardous weather is low. .KEY MESSAGES... - Hot and Humid weather continues through Saturday with heat indicies in the 100-105+ range, especially across central Missouri. Temperatures cool down slightly by Sunday. - Residual shower/storm activity through the morning/early afternoon, with potential impacts on afternoon/evening activity. Confidence remains low in exact evolution of afternoon activity. - Greater confidence in showers/storms during the late evening along the I-70 corridor, with lightning, strong winds, and heavy rainfall being the primary hazards.
In the hours before
Special weather statement, Jul 4, 11:26 AM CDT, 1 hour 25 minutes before
Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
1126 AM CDT Sat Jul 4 2026
KSZ057-060-041730-
Miami KS-Linn KS-
1126 AM CDT Sat Jul 4 2026
...STRONG THUNDERSTORMS WILL IMPACT SOUTHERN MIAMI AND LINN COUNTIES
THROUGH 1230 PM CDT...
At 1125 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Princeton to near Garnett to near Colony.
Movement was east at 40 mph.
HAZARD...Wind gusts up to 50 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Paola, Osawatomie, Louisburg, Pleasanton, La Cygne, Mound City,
Drexel, Linn Valley, Parker, Blue Mound, Prescott, Fontana, New
Lancaster, and Beagle.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3804 9507 3856 9507 3862 9461 3804 9461
TIME...MOT...LOC 1625Z 264DEG 35KT 3846 9526 3821 9525 3801 9538
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
CMSLocal storm report, Jul 4, 12:03 PM CDT, 48 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
1203 PM CDT Sat Jul 4 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1152 PM Tstm Wnd Dmg 2 SSE Barnard 40.14N 94.80W
07/03/2026 Nodaway MO Utility Company
Several reports of downed wires and power
outages between Barnard and Bolckow. Time
estimated from radar.
1208 AM Tstm Wnd Dmg 4 WSW Cosby 39.85N 94.75W
07/04/2026 Andrew MO Utility Company
Downed wires and several power outages near
Route W and near U.S. Highway 169 in Andrew
County. Time confirmed from radar.
1213 AM Tstm Wnd Dmg 6 N Wathena 39.85N 94.94W
07/04/2026 Doniphan KS Utility Company
Downed power lines and several power outages
near Treece Road. Time confirmed from radar.
1245 AM Tstm Wnd Dmg 4 SE Country Club Villa 39.79N 94.78W
07/04/2026 Buchanan MO Utility Company
Several reports of downed wires and power
outages on the east sides of St. Joseph and
Country Club Village.
1159 AM Tstm Wnd Dmg 3 SSW Paola 38.53N 94.89W
07/04/2026 Miami KS Local Official
Downed power lines near 327th and Old Kansas
City Road. 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 |
|---|---|---|---|---|
| Jul 3, 11:18 PM CDT | Special Weather Statement | EAX | Holt, Nodaway | 27 min |
| Jul 3, 11:50 PM CDT | Severe Thunderstorm Warning | EAX | Andrew, Atchison, Buchanan, DeKalb, Gentry, Holt and 1 more | 40 min |
| Jul 4, 12:28 AM CDT | Severe Thunderstorm Warning | EAX | Andrew, Buchanan, Clinton, DeKalb, Gentry, Holt and 1 more | 47 min |
| Jul 4, 1:20 AM CDT | Special Weather Statement | EAX | Caldwell, Clinton | 25 min |
| Jul 4, 2:33 AM CDT | Special Weather Statement | EAX | Johnson | 27 min |
| Jul 4, 2:42 AM CDT | Special Weather Statement | EAX | Johnson | 33 min |
| Jul 4, 11:57 AM CDT | Severe Thunderstorm Warning | EAX | Bates, Cass, Henry, Jackson, Johnson | 48 min |
| Jul 4, 12:25 PM CDT | Flash Flood Warning | EAX | Cass | 3 hr |
| Jul 4, 12:41 PM CDT | Severe Thunderstorm Warning | EAX | Bates, Cass, Henry, Jackson, Johnson, Pettis and 1 more | 49 min |
| Jul 4, 1:25 PM CDT | Severe Thunderstorm Warning | EAX | Cooper, Henry, Johnson, Pettis | 80 min |
| Jul 4, 1:32 PM CDT | Areal Flood Advisory | EAX | Pettis | 3 hr |
| Jul 4, 3:35 PM CDT | Areal Flood Warning | EAX | Bates, Cass | 3 hr |
Nearby
Flash 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.