Flash Flood Warning 16, NWS Kansas City, MO

614 
WGUS73 KEAX 170414
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
1114 PM CDT Sat May 16 2026

MOC079-170830-
/O.CON.KEAX.FF.W.0016.000000T0000Z-260517T0830Z/
/00000.U.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Grundy MO-
1114 PM CDT Sat May 16 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 AM CDT SUNDAY FOR
CENTRAL GRUNDY COUNTY...

At 1114 PM CDT, Grundy County emergency management reported that much
of the flash flooding in the city of Trenton has diminished However,
radar estimates between 6 and 8 inches of rain have fallen, which
will continue to lead to localized flash flooding.

HAZARD...Excessive runoff from thunderstorms.

SOURCE...Emergency management 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 4016 9376 4015 9339 3999 9339 4004 9376

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

CDB

848 
WGUS73 KEAX 170828 RRA
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
328 AM CDT Sun May 17 2026

MOC079-170838-
/O.EXP.KEAX.FF.W.0016.000000T0000Z-260517T0830Z/
/00000.U.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Grundy MO-
328 AM CDT Sun May 17 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 330 AM CDT EARLY THIS MORNING
FOR CENTRAL GRUNDY COUNTY...

The flash flood warning has been replaced with an areal flood
warning, which is in effect until 1200 PM CDT.

&&

LAT...LON 4016 9376 4015 9339 3999 9339 4004 9376

$$

CMS

Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
626 PM CDT Sat May 16 2026

...Updated 00z Aviation...

.KEY MESSAGES...

* Strong to severe storms possible (50-70%) late this afternoon and
  evening, primarily across northern Missouri. All hazards are
  possible, but the greatest threats are damaging winds and heavy
  rainfall.

* Warm and windy conditions Sunday before another chance of storms
  later in the evening/overnight, mainly across northern Missouri
  again. The primary hazard would be hail.

* Greatest chance for severe weather arrives Monday evening into
  the overnight hours. All severe hazards will be possible.

&&

.DISCUSSION...
Issued at 342 PM CDT Sat May 16 2026

Earlier this morning, scattered showers and storms driven by the low-
level jet spread across the southern half of the CWA. A residual
outflow boundary from overnight convection lifting north caused
additional storms to form near the US-36 corridor. These storms
persisted for a couple of hours before decaying in tandem with the
low-level jet. CAMs were unable to latch onto the morning
convection, thus limiting trust in guidance for the remainder of the
immediate forecast period and leading to several questions about how
the evening will unfold.

In the wake of morning precipitation and storms, clear sky
conditions  largely took hold along and west of US-63. This, along
with southerly surface flow, led to destabilization across the CWA.
Mesoanalysis indicates around 1000-1500 J/kg of SBCAPE was ushered
into the region between 15Z and 18Z. As of 20Z, SBCAPE across
Missouri has increased to 3000-4000 J/kg. ACARS soundings have shown
this trend, most recently with SBCAPE ~3000 J/kg and falling CIN.
With increased instability, sporadic cumulus development was noted
across the region early this afternoon. The latest analysis of
surface observations indicate that a stalled boundary continues to
roughly bisect Iowa in a northwest/southeast manner. This boundary
will be the primary lifting mechanism as we head into the late
afternoon and early evening. Importantly, there has been a southward
trend in the boundary's trajectory this evening, ultimately
increasing the likelihood of convection for the northern portions of
Missouri as well as northeast Kansas. Satellite imagery remains
indicative of some sort of mesoscale boundary within the US-36
corridor that could allow for convection to light up as a weak
shortwave trough propagates eastward and ahead of the larger,
synoptic scale boundary currently sitting in Iowa. As such, isolated
discrete storms could form as early as late this afternoon. With
CAPE >1000 J/kg in the hail growth zone, hail is a reasonable
expectation for storms that are able to develop in the late
afternoon hours. LCLs are anticipated to sit roughly around 1500ft,
and 19Z mesoanalysis suggests the presence of 100-150 m2/s2 0-1km
SRH east of I-35 with >150 m2/s2 0-3km SRH surrounding the US-36
corridor in Missouri. The tornado threat is expected to be largely
confined to the late afternoon/early evening with any supercellular
structures that are able to develop. As the northern boundary sags
south later in the evening, rapid upscale growth is anticipated,
after which point the primary threat would become damaging winds and
excessive rainfall, but a tornado cannot be entirely ruled out due
to potential boundary interactions and cell mergers. With several
models suggesting PWATs > 1.8", confidence in heavy rainfall between
the US-36 corridor and the Missouri-Iowa border is high, leading to
WPC upgrading to a slight risk of excessive rainfall through 12Z
tomorrow.

Storms are expected to retreat northward with the synoptic boundary
after midnight, though the southward portion of a QLCS coming out of
western Kansas and Nebraska could lead to brief periods of rain and
thunder in our far northern Missouri counties through sunrise.
Southerly flow will prevail on Sunday, allowing for another day of
temperatures in the mid/upper 80s. Breezy conditions will also be
widespread with sustained winds up to 15-20 MPH and gusts up to 35-
40 MPH. Much of the area is outlooked in a marginal risk for strong
to severe storms tomorrow evening, though assessment of forecast
soundings suggests the cap will be rather difficult to overcome.
Upper-level support also looks considerably better further north and
west of the CWA. Some broad and weak QG frontogenic forcing
overnight could produce or sustain some elevated showers and storms
from other portions of the Plains, but CAMs don't seem particularly
eager on anything severe tomorrow night.

Looking ahead to Monday, an upper/mid-level trough axis is progged
to sit overhead of the Four Corners region. Throughout the course of
the day, a mid-level jet is expected to intensify, primarily into
Kansas, Nebraska, and Iowa where southwesterly flow around 80 knots
is predicted to be present. Closer to home, only about half the
magnitude of the mid-level jet is realized. A surface low pressure
center near the IA/NE/MN border with an attendant cold front will
continue to move eastward, with the cold front pushing into Kansas
and Missouri sometime Monday evening. Guidance suggests that a high
to extremely unstable airmass will spread across much of the Central
Plains. Deep layer shear is anticipated to strengthen to 40-45 kts
ahead of the cold front. High CAPE in the HGZ, DCAPE, SRH, PWATs and
low LCLs are all indicative of a robust convective environment.
Questions remain regarding the timing of the front and whether we
will see discrete convection initiate in the open warm sector.
However, confidence is high in a line of thunderstorms along the
front sometime Monday evening and/or overnight into early Tuesday
morning.

&&

.AVIATION /00Z TAFS THROUGH 00Z MONDAY/...
Issued at 623 PM CDT Sat May 16 2026

Cold front will move through the area this evening, bringing
wide spread rain showers and strong thunderstorms in northern
Missouri. Heavy rainfall in northern Missouri will result in
brief IFR conditions. Most cloud bases will be VFR. Expect most
of the KC metro terminals to miss out on the heavier
shower/storm activity. Winds will remain gusty through Sunday.

&&

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

&&

DISCUSSION...Macko
AVIATION...Krull

Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
0506 AM CDT Sat May 16 2026

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-171006-
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 May 16 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...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 into early next week.

- Strong to severe storms will be possible tonight, primarily
  across northern Missouri.

- Marginal risk for strong to severe storms on Sunday
  evening/night.

- Best chance for severe weather comes Monday afternoon into
  late Monday night. All severe hazards will be possible.

  - Locally moderate to heavy rainfall will also be possible.

- Hot temperatures expected today through Monday.

Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
813 PM CDT Sat May 16 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0811 PM     Hail             Albany                  40.25N 94.33W
05/16/2026  E1.00 Inch       Gentry             MO   Public

&&

CDB

Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
827 PM CDT Sat May 16 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0758 PM     Tstm Wnd Gst     1 E Eagleville          40.47N 93.98W
05/16/2026  E58 MPH          Harrison           MO   Trained Spotter

            Video from trained spotter on social media
            shows severe caliber winds along I-35 near
            Eagleville MO.

&&

AK

Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
831 PM CDT Sat May 16 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0828 PM     Flash Flood      2 SSW Tindall           40.13N 93.63W
05/16/2026                   Grundy             MO   Emergency Mngr

            Water rescue needed along NW 22nd Ave east
            of Thompson River.

&&

AK

Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
834 PM CDT Sat May 16 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0825 PM     Hail             1 SE Albany             40.24N 94.32W
05/16/2026  E2.00 Inch       Gentry             MO   Law Enforcement

&&

CDB

Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
841 PM CDT Sat May 16 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0628 PM     Tstm Wnd Dmg     7 WNW Purdin            39.99N 93.29W
05/16/2026                   Linn               MO   Fire Dept/Rescue

            Damage to outbuildings along Clark Drive
            west of Browning MO. Time estimated from
            radar.

&&

AK

Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
845 PM CDT Sat May 16 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0631 PM     Tstm Wnd Dmg     5 WNW Purdin            39.98N 93.26W
05/16/2026                   Linn               MO   Fire Dept/Rescue

            Report of tree down on Hwy DD 1 mile east of
            Shafter MO. Time estimated from radar.

&&

AK