Alert archive / Missouri / Flash Flood Warnings in 2026
Flash Flood Warning 37, NWS Kansas City, MO
NWS Kansas City, MO issued this flash flood warning at Jun 11, 2026, 8:45 AM CDT for 4 counties in Missouri. It was in force for 3 hr. 2 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
- Jun 11, 2026, 8:45 AM CDT (13:45 UTC)
- Expired
- Jun 11, 2026, 11:45 AM CDT
- In force
- 3 hr
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Grundy County, MO, Mercer County, MO, Putnam County, MO, Sullivan County, MO
The radar
The Des Moines radar (KDMX), 152 km from the middle of the area, began a volume at 13:50 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 |
|---|---|---|---|
| Jun 11, 9:45 AM CDT | FLASH FLOOD | 3 Ne Unionville, MO | Route 129 closed from flooding. Time estimated from radar. |
| Jun 11, 10:44 AM CDT | FLASH FLOOD | 4 N Green Castle, MO | Route D closed due to flooding. |
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 2 storm reports to this flash flood warning; the first came 60 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
Davenport, (KDVN), launched 12:00Z, 1.8 hours before the alert went out and 260 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
- 11 J/kg
- Mixed-layer CIN
- -285 J/kg
- Mixed-layer LCL
- 1008 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- -15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
952
WGUS53 KEAX 111345
FFWEAX
MOC079-129-171-211-111645-
/O.NEW.KEAX.FF.W.0037.260611T1345Z-260611T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
845 AM CDT Thu Jun 11 2026
The National Weather Service in Pleasant Hill has issued a
* Flash Flood Warning for...
Northeastern Grundy County in north central Missouri...
Eastern Mercer County in north central Missouri...
Putnam County in north central Missouri...
Northern Sullivan County in north central Missouri...
* Until 1145 AM CDT.
* At 845 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. The expected rainfall rate is 1
to 3 inches in 1 hour. 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...
Unionville, Green City, Greencastle, Newtown, Pollock, Lucerne,
Harris, Powersville, Lemons and Green Castle.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4022 9351 4058 9349 4058 9325 4059 9302
4059 9285 4040 9286 4022 9286
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR
$$1 follow-up statement
020
WGUS73 KEAX 111644
FFSEAX
Flash Flood Statement
National Weather Service Kansas City/Pleasant Hill MO
1144 AM CDT Thu Jun 11 2026
MOC079-129-171-211-111654-
/O.EXP.KEAX.FF.W.0037.000000T0000Z-260611T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Grundy MO-Mercer MO-Putnam MO-Sullivan MO-
1144 AM CDT Thu Jun 11 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 1145 AM CDT THIS MORNING FOR
NORTHEASTERN GRUNDY, EASTERN MERCER, PUTNAM AND NORTHERN SULLIVAN
COUNTIES...
The heavy rain has ended. However, additional thunderstorms are
possible this afternoon. A flood warning remains in effect for the
area through 1030 PM tonight. Please continue to heed remaining road
closures.
&&
LAT...LON 4022 9351 4058 9349 4058 9325 4059 9302
4059 9285 4040 9286 4022 9286
$$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 Jun 11, 6:53 AM CDT, 1 hour 52 minutes earlier. Its key messages:
- * Enhanced Risk (level 3 of 5) for severe weather today as a cold front slides through the area. All severe hazards remain possible. * Additional severe weather looks possible for Saturday.
Area forecast discussion, Jun 11, 6:53 AM CDT, 1 hour 52 minutes before
Area Forecast Discussion National Weather Service Kansas City/Pleasant Hill MO 653 AM CDT Thu Jun 11 2026 .KEY MESSAGES... * Enhanced Risk (level 3 of 5) for severe weather today as a cold front slides through the area. All severe hazards remain possible. * Additional severe weather looks possible for Saturday. && .SHORT TERM /THROUGH FRIDAY/... Issued at 349 AM CDT Thu Jun 11 2026 Thunderstorms are beginning to develop across southern NE as the main shortwave trough approaches from the High Plains. Ample moisture advection northward on a 55 kt LLJ will foster additional storm development for the next few hours across southern and eastern NE. As time progresses, supercells will congeal into an MCS while approaching Iowa and far northern MO. Large hail is the primary threat now, but as the transition to an MCS occurs, damaging winds will also become a concern. The highest threat is expected to remain mostly across central and southern IA, but the southern end of the line appears likely to graze far northern MO. Some supercellular characteristics may prevail in this section of the line with the large hail threat continuing into the mid morning hours. Depending how far south the line reaches will determine whether the ongoing flooding across northern MO is exacerbated. The Flood Watch was cancelled with the thought the hardest hit areas will be missed from this morning's activity. The MCS will continue tracking east to northern IL by early afternoon. The low pressure center will be located over central/eastern IA midday with a cold front extending southwest into far northwest MO and eastern KS. Additional thunderstorm development will take place along the front mid afternoon, likely stretching from west central to northeast MO. Northwestern MO and northeast KS may be skipped by the second round. The extensive squall line will be capable of all severe weather hazards. Some slightly backed low level flow toward northeast MO may aid with a better tornado threat there, otherwise large hail and damaging winds will be the primary hazards through late afternoon. The front will clear to the southeast by early evening and the thunderstorm risk will end. Much cooler and drier air arrives with the frontal passage and lows tonight will drop into the 50s. Clear skies and pleasant conditions for Friday. && .LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/... Issued at 349 AM CDT Thu Jun 11 2026 High pressure will slide east late Friday and return flow will begin Friday night. Low pressure over the central Plains and steepening mid level lapse rates will facilitate the redevelopment of showers and thunderstorms as another cold front sinks south. Supercells will be possible initially Saturday before congealing into clusters or complexes and continuing into Saturday night. All severe weather hazards are possible, including flash flooding. The cold front will pass through and exit to the south by Sunday. Cooler and drier air will usher in with a large trough across the northern and eastern U.S. Weak shortwaves could bring occasional low chances for showers and thunderstorms, but nothing looks too significant at this time. && .AVIATION /12Z TAFS THROUGH 12Z FRIDAY/... Issued at 646 AM CDT Thu Jun 11 2026 Gusty conditions expected for the duration of the period. Winds gust around 25-30 knots this morning. A cold front moves through the area around midday which shifts winds from SW to NW. Gusts around 30 to intermittent 40 knots are expected. SHRA and TSRA are expected to develop as the front moves through the KC metro; however, better probabilities are expected east of the terminals. Winds dissipate during the overnight. && .EAX WATCHES/WARNINGS/ADVISORIES... MO...None. KS...None. && SHORT TERM...Borghoff LONG TERM...Borghoff AVIATION...Pesel
Hazardous weather outlook, Jun 11, 5:05 AM CDT, 3 hours 40 minutes before
Hazardous Weather Outlook National Weather Service Kansas City/Pleasant Hill MO 0505 AM CDT Thu Jun 11 2026 KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040- 043>046-053-054-121005- 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 Thu Jun 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. Please go to https://weather.gov/media/eax/DssPacket.pdf for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Please go to https://weather.gov/media/eax/DssPacket.pdf for more information on potential weather hazards. .KEY MESSAGES... * Enhanced Risk (level 3 of 5) for severe weather today as a cold front slides through the area. All severe hazards remain possible. * Additional severe weather looks possible for Saturday.
In the hours before
Local storm report, Jun 11, 8:21 AM CDT, 24 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
821 AM CDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0815 AM Tstm Wnd Gst Mercer 40.51N 93.53W
06/11/2026 E65 MPH Mercer MO Emergency Mngr
Estimated 60 to 65 mph gusts in Mercer.
&&
BMWLocal storm report, Jun 11, 8:38 AM CDT, 7 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
838 AM CDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0825 AM Hail 2 SW Bethany 40.25N 94.06W
06/11/2026 E1.50 Inch Harrison MO Emergency Mngr
Ping pong ball sized hail reported at the
junction of US 136 and US 69.
&&
BMWLocal storm report, Jun 11, 8:40 AM CDT, 5 minutes before
Preliminary Local Storm Report
National Weather Service Kansas City/Pleasant HIll MO
840 AM CDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0826 AM Hail Bethany 40.26N 94.03W
06/11/2026 E1.00 Inch Harrison MO Public
Quarter sized hail reported in Bethany.
&&
BMWThe office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 7:04 PM CDT | Severe Thunderstorm Warning | EAX | Grundy, Harrison, Mercer | 41 min |
| Jun 10, 7:07 PM CDT | Severe Thunderstorm Warning | EAX | Adair, Putnam, Sullivan | 53 min |
| Jun 10, 7:10 PM CDT | Severe Thunderstorm Warning | EAX | Andrew, Holt | 65 min |
| Jun 10, 7:29 PM CDT | Severe Thunderstorm Warning | EAX | Grundy, Mercer, Putnam, Sullivan | 46 min |
| Jun 10, 7:44 PM CDT | Areal Flood Advisory | EAX | Gentry, Grundy, Harrison, Mercer, Nodaway, Putnam and 1 more | 6 hr |
| Jun 10, 8:01 PM CDT | Severe Thunderstorm Warning | EAX | Daviess, Grundy, Harrison, Linn, Sullivan | 44 min |
| Jun 10, 8:10 PM CDT | Flash Flood Warning | EAX | Adair, Grundy, Mercer, Putnam, Schuyler, Sullivan | 6 hr |
| Jun 10, 8:51 PM CDT | Flash Flood Warning | EAX | Adair, Schuyler | 5 hr |
| Jun 10, 9:47 PM CDT | Flash Flood Warning | EAX | Gentry, Harrison, Nodaway, Worth | 3 hr |
| Jun 10, 11:00 PM CDT | Flash Flood Warning | EAX | Adair, Grundy, Linn, Livingston, Macon, Sullivan | 3 hr |
| Jun 10, 11:57 PM CDT | River Flood Warning | EAX | Grundy, Livingston | 11 hr |
| Jun 10, 11:58 PM CDT | River Flood Warning | EAX | Adair, Macon, Putnam, Schuyler | 14 hr |
| Jun 11, 1:49 AM CDT | Areal Flood Warning | EAX | Adair, Daviess, DeKalb, Gentry, Grundy, Harrison and 7 more | 9 hr |
| Jun 11, 4:48 AM CDT | Severe Thunderstorm Warning | EAX | Atchison | 15 min |
| Jun 11, 6:12 AM CDT | Severe Thunderstorm Warning | EAX | Grundy, Mercer | 25 min |
| Jun 11, 6:32 AM CDT | Severe Thunderstorm Warning | EAX | Nodaway, Worth | 43 min |
| Jun 11, 6:57 AM CDT | Severe Thunderstorm Warning | EAX | Putnam, Schuyler, Sullivan | 48 min |
| Jun 11, 7:06 AM CDT | Severe Thunderstorm Warning | EAX | Gentry, Harrison, Mercer, Worth | 54 min |
| Jun 11, 7:55 AM CDT | Severe Thunderstorm Warning | EAX | Gentry, Grundy, Harrison, Mercer, Putnam, Worth | 50 min |
| Jun 11, 8:02 AM CDT | Flash Flood Warning | EAX | Gentry, Grundy, Harrison, Mercer, Worth | 3 hr |
| Jun 11, 8:28 AM CDT | Severe Thunderstorm Warning | EAX | Daviess, Grundy, Harrison, Mercer, Putnam, Schuyler and 1 more | 47 min |
| Jun 11, 8:58 AM CDT | River Flood Warning | EAX | Atchison, Holt | 25 hr |
| Jun 11, 9:06 AM CDT | Severe Thunderstorm Warning | EAX | Adair, Grundy, Linn, Macon, Mercer, Putnam and 2 more | 54 min |
| Jun 11, 9:36 AM CDT | Tornado Warning | EAX | Putnam, Schuyler | 22 min |
| Jun 11, 9:56 AM CDT | Severe Thunderstorm Warning | EAX | Adair, Linn, Macon, Putnam, Schuyler, Sullivan | 64 min |
| Jun 11, 10:40 AM CDT | Areal Flood Warning | EAX | Adair, Chariton, Daviess, DeKalb, Gentry, Grundy and 10 more | 36 hr |
| Jun 11, 1:42 PM CDT | River Flood Warning | EAX | Andrew, Buchanan | 50 hr |
| Jun 11, 1:52 PM CDT | Severe Thunderstorm Warning | EAX | Grundy, Mercer, Putnam, Schuyler, Sullivan | 53 min |
| Jun 11, 2:23 PM CDT | River Flood Warning | EAX | Andrew, Nodaway | 39 hr |
| Jun 11, 2:42 PM CDT | Severe Thunderstorm Warning | EAX | Adair, Putnam, Schuyler, Sullivan | 63 min |
| Jun 11, 3:03 PM CDT | River Flood Warning | EAX | Grundy, Livingston | 30 hr |
| Jun 11, 3:04 PM CDT | Severe Thunderstorm Warning | EAX | Linn, Macon | 56 min |
| Jun 11, 3:08 PM CDT | Severe Thunderstorm Warning | EAX | Carroll, Saline | 52 min |
| Jun 11, 3:21 PM CDT | Tornado Warning | EAX | Adair, Schuyler | 25 min |
| Jun 11, 3:43 PM CDT | Flash Flood Warning | EAX | Adair, Putnam, Schuyler | 3 hr |
| Jun 11, 3:43 PM CDT | Severe Thunderstorm Warning | EAX | Adair, Macon | 47 min |
| Jun 11, 3:50 PM CDT | Severe Thunderstorm Warning | EAX | Macon | 40 min |
| Jun 11, 3:51 PM CDT | Tornado Warning | EAX | Macon | 27 min |
| Jun 11, 3:56 PM CDT | Special Weather Statement | EAX | Carroll | 34 min |
| Jun 11, 4:16 PM CDT | Severe Thunderstorm Warning | EAX | Carroll, Chariton, Howard, Saline | 44 min |
| Jun 11, 4:26 PM CDT | Severe Thunderstorm Warning | EAX | Macon | 49 min |
| Jun 11, 4:36 PM CDT | Flash Flood Warning | EAX | Macon | 3 hr |
| Jun 11, 4:38 PM CDT | Severe Thunderstorm Warning | EAX | Bates, Cass, Henry | 67 min |
| Jun 11, 4:49 PM CDT | Severe Thunderstorm Warning | EAX | Johnson | 41 min |
| Jun 11, 4:49 PM CDT | Severe Thunderstorm Warning | EAX | Chariton, Howard, Randolph, Saline | 56 min |
| Jun 11, 5:03 PM CDT | Severe Thunderstorm Warning | EAX | Cooper, Howard, Pettis, Saline | 57 min |
| Jun 11, 5:41 PM CDT | Severe Thunderstorm Warning | EAX | Henry | 49 min |
| Jun 11, 5:44 PM CDT | Severe Thunderstorm Warning | EAX | Howard | 31 min |
| Jun 11, 5:55 PM CDT | Severe Thunderstorm Warning | EAX | Cooper, Howard, Pettis | 50 min |
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.