Alert archive / Missouri / Flash Flood Warnings in 2026

Flash Flood Warning 6, NWS Kansas City, MO

April 11, 2026Doniphan County, Kansas; 4 counties in Missouri

NWS Kansas City, MO issued this flash flood warning at Apr 11, 2026, 10:33 AM CDT for Doniphan County, Kansas; 4 counties in Missouri. It was in force for 4 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
Apr 11, 2026, 10:33 AM CDT (15:33 UTC)
Expired
Apr 11, 2026, 2:48 PM CDT
In force
4 hr
Issued by
NWS Kansas City, MO
Area
Storm-based polygon
Flood severity
None

Counties Doniphan County, KS, Andrew County, MO, Buchanan County, MO, DeKalb County, MO, Holt County, MO

The radar

The Topeka radar (KTWX), 133 km from the middle of the area, began a volume at 15:35 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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, 3.6 hours before the alert went out and 102 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-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 2026-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 12:00Z on 2026-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 314 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
678 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
314 m²/s²
0-3 km storm-relative helicity
339 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

507 
WGUS53 KEAX 111533
FFWEAX
KSC043-MOC003-021-063-087-112130-
/O.NEW.KEAX.FF.W.0006.260411T1533Z-260411T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
1033 AM CDT Sat Apr 11 2026

The National Weather Service in Pleasant Hill MO has issued a

* Flash Flood Warning for...
  Central Doniphan County in northeastern Kansas...
  Southern Andrew County in northwestern Missouri...
  North Central Buchanan County in northwestern Missouri...
  Central DeKalb County in northwestern Missouri...
  Southeastern Holt County in northwestern Missouri...

* Until 430 PM CDT.

* At 1033 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 3 inches of 
  rain have fallen. The expected rainfall rate is 1 to 2 inches in 2 
  hours. Additional rainfall amounts of 0.5 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...
  St. Joseph, Savannah, Wathena, Maysville, Highland, Troy, Country 
  Club Villa, Country Club, Amazonia, Denton, Cosby, Severance, 
  Leona, Helena, Fanning, Bendena and Fairport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3973 9534 3974 9534 3976 9534 3977 9534
      3978 9534 3979 9534 3981 9534 3983 9534
      3984 9534 3986 9534 3991 9499 3996 9460
      4001 9430 3991 9428 3982 9471 3977 9493
      3968 9534

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

$$

BT
1 follow-up statement
677 
WGUS73 KEAX 111948
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
248 PM CDT Sat Apr 11 2026

KSC043-MOC003-021-063-087-111958-
/O.CAN.KEAX.FF.W.0006.000000T0000Z-260411T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Doniphan KS-Andrew MO-Buchanan MO-DeKalb MO-Holt MO-
248 PM CDT Sat Apr 11 2026

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL DONIPHAN, SOUTHERN 
ANDREW, NORTH CENTRAL BUCHANAN, CENTRAL DEKALB AND SOUTHEASTERN HOLT 
COUNTIES...

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

&&

LAT...LON 3973 9534 3974 9534 3976 9534 3977 9534
      3978 9534 3979 9534 3981 9534 3983 9534
      3984 9534 3986 9534 3991 9499 3996 9460
      4001 9430 3991 9428 3982 9471 3977 9493
      3968 9534

$$

BT

What 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 Apr 11, 7:01 AM CDT, 3 hours 32 minutes earlier. Its key messages:

  • * Active weather pattern continues across the region, through the weekend and into middle of next week. * Severe storm threat through the weekend continues to appear low, with better chances appearing possible Tuesday and Wednesday. * With numerous chances for rain into/through middle of next week, river and areal flooding may be realized across portions of the area, but highly dependent on where areas of heavier rainfall occur/overlap over the coming days.
Area forecast discussion, Apr 11, 7:01 AM CDT, 3 hours 32 minutes before
Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
701 AM CDT Sat Apr 11 2026

.KEY MESSAGES...

* Active weather pattern continues across the region, through the
  weekend and into middle of next week.

* Severe storm threat through the weekend continues to appear low,
  with better chances appearing possible Tuesday and Wednesday.

* With numerous chances for rain into/through middle of next
  week, river and areal flooding may be realized across portions
  of the area, but highly dependent on where areas of heavier
  rainfall occur/overlap over the coming days.

&&

.DISCUSSION...
Issued at 353 AM CDT Sat Apr 11 2026

To this point in the overnight, much quieter and drier compared to
previous overnight. But, that is gradually coming to an end for at
least portions of the forecast area at the time of this discussion.
With the eastward departure of northern stream shortwave and
attendant/trailing high pressure, southerly flow has begun to
reestablish over the Central Plains. Aside from general warm air and
moisture advection, a 35-45+ kt LLJ has allowed elevated showers and
thunderstorms to blossom over portions of north-central to northeast
Kansas and southeast Nebraska. Much of this activity had been well
advertised by CAMs and currently unfolding largely as anticipated,
including more of a NE/ENE trajectory once established and
influenced by more of the mean flow. Through the remainder of the
overnight and into Saturday morning, LLJ will continue to establish
more of a SW orientation, helping gradually push into and across the
NW/N portions of the forecast area. There is some lower-end/casual
concern for localized flooding issues as this activity overspreads
the area, especially with pockets of MRMS 3-hr estimates of >2.5"
and 1-hr estimates >1.5" over portions of Kansas. That would
approach or exceed the rejective RFC 3-hr and 1-hr FFG and would be
most likely in areas where some training may be seen as the LLJ
angles into the area. Fortunately, though, the pockets of heavier
rain are expected to mainly be displaced northward from the areas of
heavier rain Thursday night/Friday morning. Activity eventually
lifts into Iowa and across Northern Missouri through the morning,
meanwhile surface boundary lifts back northward as a warm front.

Additional storm development may be seen later this
afternoon/evening and into the overnight. Confidence is greatest in
the overnight hours with anticipated 45-50+ kt LLJ. Elevated nature
limits severe potential, but given recent rains localized flooding
would be possible. Lesser confidence in any late afternoon/evening
activity, but carries a bit of a conditional threat in that if some
can develop in a weakly capped environment, they may carry hail/tor
threat if near the warm front. Working against that though is
focused lift and overall weak to marginal wind profiles for
organization. This would appear to be most possible over far NW
Missouri and into Nebraska and SW Iowa. CAMs are far from unanimous
in the afternoon/evening potential. This too is noted within new SPC
Day 1 Outlook.

By Sunday morning, mid-upper level pattern over central CONUS will
be solidly southwesterly while a cutoff low moves inland over
central/northern California. Synoptic guidance is in good agreement
of another surging plume of moisture lifting northward along with a
shortwave riding up through the SW flow. This will overspread
showers and general thunder across the area. Severe threat remains
quite low here given the widespread and prolonged nature, helping
keep profiles unsupportive overall. Some training concern here keeps
flooding a concern, though widespread issues remain unlikely as
activity does progressively get pushed eastward as surface low
develops and moves drier into the Plains.

Monday looks mostly dry at this point with aforementioned surface
low and dry air intruding at least western portions of the area. But
ongoing WAA also begins to set the table for better strong/severe
storm chances as early as Monday night/overnight, Tuesday, and
Wednesday. Significant capping puts the kibosh on Monday evening,
but possible a storm or two develops in the overnight as cap weakens
and LLJ increases. Elevated nature would yield primarily a hail
threat. Better potential appears Tuesday with cap notably weaker,
depicted approaching shortwave, strong mid-level lapse rates, and
generally supportive shear magnitude and profiles. There remain
discrepancies in how synoptic guidance evolves surface low
development and trajectory though, so details remain difficult to be
confident in. A somewhat similar story possible Wednesday as well.
Suffice it to say all hazards may be possible Tuesday/Wednesday.
This too is reflected within SPC Days 4/5 Outlooks highlighting much
of or significant portions of the CWA with 15% probabilities
(Equivalent to SPC Slight). By Thursday, activity looks to clear out
as western trough moves out across the Plains, giving the area a bit
of a break, but may not last long with depictions of next western
CONUS trough dropping down Friday and across central CONUS next
weekend.

Throughout this forecast period temperatures tend to reside on the
warm side, tempered some by the showers/storms and cloud cover, with
persistent southerly surface flow in place. Expect highs in the
70s this weekend and highs in the mid 70s to mid 80s through
majority of the work week.

&&

.AVIATION /12Z TAFS THROUGH 12Z SUNDAY/...
Issued at 630 AM CDT Sat Apr 11 2026

A fairly messy and somewhat uncertain TAF period is in store for
the sites. At onset, shower and thunderstorm activity beginning
to spread in from NW Kansas to NW Missouri, primarily affecting
KSTJ and clipping KMCI. That in addition to generally MVFR
ceilings across the area with likely transition to IFR ceilings
over the coming hours. Improvement expected as precipitation
activity drifts E/ENE through the day and degree of diurnal
mixing is achieved, lifting ceilings to MVFR by this afternoon
and VFR late afternoon/early evening. Low probability for
additional scattered TSRA this afternoon/evening, but not high
enough to introduce any prevailing mentions. Toward the very end
of the period, showers/storms begin to overspread the area
again, but currently anticipate to largely hold off until after
12z Sunday, so no mentions within this issuance.

&&

.EAX WATCHES/WARNINGS/ADVISORIES...
MO...None.
KS...None.

&&

DISCUSSION...Curtis
AVIATION...Curtis
Hazardous weather outlook, Apr 11, 5:06 AM CDT, 5 hours 27 minutes before
Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
0506 AM CDT Sat Apr 11 2026

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-121006-
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-
0506 AM CDT Sat Apr 11 2026

This hazardous weather outlook is for northwest...north central and
west central Missouri...as well as extreme eastern Kansas.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Please go to https://weather.gov/media/eax/DssPacket.pdf for more information on
potential weather hazards.

.KEY MESSAGES...

* Active weather pattern continues across the region, through the
  weekend and into middle of next week.

* Severe storm threat through the weekend continues to appear low,
  with better chances appearing possible Tuesday and Wednesday.

* With numerous chances for rain into/through middle of next
  week, river and areal flooding may be realized across portions
  of the area, but highly dependent on where areas of heavier
  rainfall occur/overlap over the coming days.

Nearby

Flash Flood Warnings in Missouri, 2026Flash Flood Warnings in Kansas, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.