Alert archive / Missouri / Flash Flood Warnings in 2026

Flash Flood Warning 60, NWS Kansas City, MO

August 19, 2026Leavenworth County, Wyandotte County, Kansas; Clay County, Jackson County, Platte County, Missouri

NWS Kansas City, MO issued this flash flood warning at Aug 19, 2026, 3:19 AM CDT for Leavenworth County, Wyandotte County, Kansas; Clay County, Jackson County, Platte County, 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
Aug 19, 2026, 3:19 AM CDT (08:19 UTC)
Expired
Aug 19, 2026, 6:54 AM CDT
In force
4 hr
Issued by
NWS Kansas City, MO
Area
Storm-based polygon
Flood severity
None

Counties Leavenworth County, KS, Wyandotte County, KS, Clay County, MO, Jackson County, MO, Platte County, MO

The radar

The Pleasant Hill radar (KEAX), 61 km from the middle of the area, began a volume at 08:22 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

Springfield, MO (KSGF), launched 00:00Z, 8.3 hours before the alert went out and 262 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, Springfield, MO at 00:00Z on 2026-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1335 joules per kilogram.LCLLFCEL10008507005003002001001 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, Springfield, MO at 00:00Z on 2026-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
1335 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
2050 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
255 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.8

Open this sounding in Storm Lab

The text

As transmitted.

271 
WGUS53 KEAX 190819
FFWEAX
KSC103-209-MOC047-095-165-191415-
/O.NEW.KEAX.FF.W.0060.260819T0819Z-260819T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
319 AM CDT Wed Aug 19 2026

The National Weather Service in Pleasant Hill has issued a

* Flash Flood Warning for...
  Leavenworth County in northeastern Kansas...
  Wyandotte County in northeastern Kansas...
  Southwestern Clay County in west central Missouri...
  Northwestern Jackson County in west central Missouri...
  Southeastern Platte County in west central Missouri...

* Until 915 AM CDT.

* At 319 AM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Between 2 and 3 inches of rain
  have fallen. 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, Leavenworth, Gladstone, Lansing, Mission, Smithville,
  Bonner Springs, Parkville, Tonganoxie, Platte City, Basehor,
  Edwardsville and North Kansas City.

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 3905 9491 3906 9519 3913 9519 3913 9518
      3938 9518 3934 9447 3902 9448 3903 9461
      3904 9461 3904 9480 3906 9484 3906 9487
      3905 9488

FLASH FLOOD...RADAR INDICATED

$$

Pesel
2 follow-up statements
746 
WGUS73 KEAX 191009
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
509 AM CDT Wed Aug 19 2026

KSC103-209-MOC047-095-165-191415-
/O.CON.KEAX.FF.W.0060.000000T0000Z-260819T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Leavenworth KS-Wyandotte KS-Clay MO-Jackson MO-Platte MO-
509 AM CDT Wed Aug 19 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 AM CDT THIS
MORNING FOR LEAVENWORTH, WYANDOTTE, SOUTHWESTERN CLAY, NORTHWESTERN
JACKSON AND SOUTHEASTERN PLATTE COUNTIES...

At 509 AM CDT, The storms which produced 2 to 4 inches of rain across
the warned area have pushed south of the region and weakened. No
significant rainfall is expected in the short-term. However, runoff
from the earlier heavy rainfall will continue to produce flooding
across flood-prone areas during the next couple of hours.

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, Leavenworth, Gladstone, Lansing, Mission, Smithville,
  Bonner Springs, Parkville, Tonganoxie, Platte City, Basehor,
  Edwardsville and North Kansas City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3905 9491 3906 9519 3913 9519 3913 9518
      3938 9518 3934 9447 3902 9448 3903 9461
      3904 9461 3904 9480 3906 9484 3906 9487
      3905 9488

FLASH FLOOD...RADAR INDICATED

$$

SAW
122 
WGUS73 KEAX 191154
FFSEAX

Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
654 AM CDT Wed Aug 19 2026

KSC103-209-MOC047-095-165-191204-
/O.CAN.KEAX.FF.W.0060.000000T0000Z-260819T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Leavenworth KS-Wyandotte KS-Clay MO-Jackson MO-Platte MO-
654 AM CDT Wed Aug 19 2026

...FLASH FLOOD WARNING IS CANCELLED FOR LEAVENWORTH, WYANDOTTE,
SOUTHWESTERN CLAY, NORTHWESTERN JACKSON AND SOUTHEASTERN PLATTE
COUNTIES...

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

&&

LAT...LON 3905 9491 3906 9519 3913 9519 3913 9518
      3938 9518 3934 9447 3902 9448 3903 9461
      3904 9461 3904 9480 3906 9484 3906 9487
      3905 9488

$$

SAW

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 Aug 19, 2:19 AM CDT, 1 hour earlier. Its key messages:

  • Showers and thunderstorms continue through the morning hours. Damaging winds, hail, and heavy rainfall continues.
  • Additional showers and thunderstorms are possible this afternoon and evening primarily across northern MO.
  • Temperatures gradually warm through the week with more hot and humid conditions possible next week. Additional storm chances are possible through this week.
Area forecast discussion, Aug 19, 2:19 AM CDT, 1 hour before
Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
219 AM CDT Wed Aug 19 2026

.KEY MESSAGES...

- Showers and thunderstorms continue through the morning hours.
  Damaging winds, hail, and heavy rainfall continues.

- Additional showers and thunderstorms are possible this
  afternoon and evening primarily across northern MO.

- Temperatures gradually warm through the week with more hot
  and humid conditions possible next week. Additional storm
  chances are possible through this week.

&&

.DISCUSSION...
Issued at 217 AM CDT Wed Aug 19 2026

Showers and thunderstorms continue along a diffuse warm frontal
boundary stretching from Oskaloosa, KS southeast through Pilot
Grove, MO. Upper level instability and ample DCAPE still promote an
environment for storms with damaging winds and some hail. As of
writing, storms are progressing just enough to mitigate most
flooding concerns. There is still some concern for hydrological
impacts as radar QPE show around 1.5 to 2 inches of rainfall across
portions of Atchison (KS) and Leavenworth counties progress eastward
into the KC metro. Storms continue to gradually sink southward with
showers and thunderstorms lingering through the morning hours;
ending by midday.

Upper level flow pivots to the northwest which help usher a mid
level shortwave southward. This brings additional opportunities for
showers and thunderstorms later this afternoon into the evening
hours primarily for areas north of the MO River. Ample instability
and shear do present a marginal opportunity for a strong to severe
storm; however, we will have a much better idea once this current
complex roles through. Another cooler airmass moves in behind this
front but all it does is delay the warming trend that arrives later
this week as broadscale ridging begins to slowly build into the
central CONUS. The center of this ridge stalls across the Rockies
putting our CWA in the NW flow of the eastern hemisphere of the
synoptic ridge. This opens up flow to allow multiple shortwaves to
pass over the region presenting further opportunities for
precipitation later in the week. Long term guidance slowly slides
this high to the east suggesting the potential for another stretch
of hot and humid conditions next week.

&&

.AVIATION /06Z TAFS THROUGH 06Z THURSDAY/...
Issued at 1242 AM CDT Wed Aug 19 2026

RA and TSRA continues for the next couple of hours across the
terminals. Gusty winds across the south side of these storms
continue affecting IXD. Additional development behind the
initial line of storms keeps RA/TSRA around through much of the
overnight. VFR conditions return during the morning and look to
persist through much of the day. Additional TSRA is possible
north of the MO River during the late afternoon/early evening;
however, some uncertainties remain with RA forecast. Winds
become light and variable after sunset.

&&

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

&&

DISCUSSION...Pesel
AVIATION...Pesel
Hazardous weather outlook, Aug 18, 5:05 AM CDT, 22 hours 14 minutes before
Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
0505 AM CDT Tue Aug 18 2026

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-191005-
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-
0505 AM CDT Tue Aug 18 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.

The probability for widespread hazardous weather is low.

.KEY MESSAGES...

- Severe thunderstorms are possible today and tonight, with the
  most likely timing from late this evening through the
  overnight hours.

- Near-normal temperatures likely Wednesday into early next week
  with low precipitation chances, mainly early next week.

In the hours before

Local storm report, Aug 19, 1:30 AM CDT, 1 hour 49 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
130 AM CDT Wed Aug 19 2026

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

0122 AM     Hail             1 NNW Maywood           39.14N 94.81W
08/19/2026  E1.75 Inch       Wyandotte          KS   Trained Spotter

            Shared photos of several hailstones
            approximately golf ball sized. Time
            estimated from radar.

&&

SPG
Local storm report, Aug 19, 1:32 AM CDT, 1 hour 47 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
132 AM CDT Wed Aug 19 2026

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

0120 AM     Hail             2 NE Piper              39.16N 94.83W
08/19/2026  E1.75 Inch       Wyandotte          KS   Public

            Golf Ball sized hail reported by the public.
            Time estimated from radar.

&&

SPG
Local storm report, Aug 19, 1:37 AM CDT, 1 hour 42 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
137 AM CDT Wed Aug 19 2026

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

0116 AM     Hail             3 NNW Piper             39.18N 94.88W
08/19/2026  M1.75 Inch       Wyandotte          KS   Public

            Photo shared on social media of measured
            hail around golf ball sized. Time estimated
            from radar.

&&

SPG
Local storm report, Aug 19, 1:50 AM CDT, 1 hour 29 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
150 AM CDT Wed Aug 19 2026

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

0122 AM     Hail             2 NE Piper              39.16N 94.83W
08/19/2026  M1.75 Inch       Wyandotte          KS   Emergency Mngr

            Emergency manager shared photo of golf ball
            sized hail, time estimated from radar.

&&

SPG
Local storm report, Aug 19, 1:53 AM CDT, 1 hour 26 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
153 AM CDT Wed Aug 19 2026

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

0132 AM     Hail             2 E Maywood             39.13N 94.76W
08/19/2026  E1.00 Inch       Wyandotte          KS   Public

            Public reported quarter sized hail. Time
            estimated from radar.

0145 AM     Hail             1 NW Kansas City        39.11N 94.59W
08/19/2026  E1.25 Inch       Jackson            MO   Public

            Public reported half dollar sized hail. Time
            estimated from radar.

&&
Local storm report, Aug 19, 2:56 AM CDT, 23 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
256 AM CDT Wed Aug 19 2026

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

0113 AM     Tstm Wnd Dmg     2 SSE Fairmount         39.17N 94.92W
08/19/2026                   Leavenworth        KS   Emergency Mngr

            Emergency manager reports large tree down
            across the roadway with powerlines down
            alongside a camper. Time estimated from
            radar.

0128 AM     Hail             1 NNE Maywood           39.15N 94.79W
08/19/2026  M1.50 Inch       Wyandotte          KS   Public

            Public shared photo of hailstone on social
            media. Time estimated from radar.

0144 AM     Hail             1 NW North Kansas City  39.15N 94.58W
08/19/2026  E1.25 Inch       Clay               MO   Public

            Public shared report via social media of
            several hailstones approximately half dollar
            sized. Time estimated from radar.

0150 AM     Hail             1 SSE North Kansas City 39.11N 94.56W
08/19/2026  E1.75 Inch       Jackson            MO   Public

            Public shared photo on social media of many
            large hailstones, with the largest
            approximately golf ball sized. Time
            estimated from radar.

0150 AM     Hail             Independence            39.09N 94.41W
08/19/2026  E1.25 Inch       Jackson            MO   Public

            Public shared photo of hail approximately
            half dollar sized. Time estimated from
            radar.

0156 AM     Hail             2 W Sugar Creek         39.10N 94.48W
08/19/2026  E1.75 Inch       Jackson            MO   Public

            Social media shared a photo of hail
            approximately golf ball sized. Time
            estimated from radar.

0156 AM     Hail             Sugar Creek             39.11N 94.45W
08/19/2026  M1.00 Inch       Jackson            MO   Public

            Public shared photo of quarter sized hail.
            Time estimated from radar.

0201 AM     Hail             1 SW Independence       39.08N 94.43W
08/19/2026  M1.50 Inch       Jackson            MO   Public

            Social media shared report of hail
            approximately ping pong in size. Time
            estimated from radar.

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 9:37 PM CDTSevere Thunderstorm WarningEAXAtchison38 min
Aug 18, 10:10 PM CDTSevere Thunderstorm WarningEAXAtchison, Leavenworth, Wyandotte36 min
Aug 18, 10:33 PM CDTSevere Thunderstorm Warning Considerable damage threatEAXJohnson, Leavenworth, Wyandotte42 min
Aug 18, 11:09 PM CDTSevere Thunderstorm WarningEAXJohnson, Wyandotte36 min
Aug 19, 12:38 AM CDTSevere Thunderstorm WarningEAXLeavenworth, Wyandotte37 min
Aug 19, 1:00 AM CDTSevere Thunderstorm WarningEAXWyandotte45 min
Aug 19, 1:12 AM CDTSevere Thunderstorm WarningEAXLeavenworth, Wyandotte23 min
Aug 19, 1:26 AM CDTAreal Flood AdvisoryEAXLeavenworth, Wyandotte3 hr
Aug 19, 1:40 AM CDTSevere Thunderstorm Warning Considerable damage threatEAXWyandotte50 min
Aug 19, 3:39 PM CDTSevere Thunderstorm WarningEAXDoniphan66 min
Aug 19, 4:18 PM CDTSevere Thunderstorm WarningEAXDoniphan42 min
Aug 19, 4:35 PM CDTSevere Thunderstorm WarningEAXAtchison25 min
Aug 19, 4:56 PM CDTSevere Thunderstorm WarningEAXDoniphan49 min
Aug 19, 4:29 AM CDTSpecial Weather StatementEAXJohnson31 min
Aug 19, 2:19 PM CDTSevere Thunderstorm WarningEAXAtchison41 min
Aug 19, 3:05 PM CDTSevere Thunderstorm WarningEAXAtchison55 min
Aug 19, 3:58 PM CDTSevere Thunderstorm WarningEAXAtchison, Nodaway21 min
Aug 19, 5:07 PM CDTSpecial Weather StatementEAXBuchanan, Clinton, Platte38 min
Aug 19, 5:27 PM CDTSevere Thunderstorm WarningEAXBuchanan, Caldwell, Clinton, Daviess, DeKalb, Gentry and 2 more48 min
Aug 19, 5:53 PM CDTSevere Thunderstorm WarningEAXCaldwell, Carroll, Clinton, Daviess, Livingston, Ray52 min
Aug 19, 6:28 PM CDTSpecial Weather StatementEAXLivingston32 min

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.