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Olean, MO Warnings, Watches and Advisories

SAFETY and DATA MESSAGE

Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.

Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Olean.

Use the Radar Maps link provided to understand the trajectory of a storm.

NWS Active Alerts for MO - Map View

State: MO Total alerts: 16 Updated: May 17, 2026 9:59am CDT

Flood Warning

Area
Andrew, MO; Nodaway, MO
Flood Warning issued May 17 at 9:43AM CDT until May 18 at 10:00PM CDT by NWS Kansas City/Pleasant Hill MO

...The National Weather Service in Kansas City/Pleasant Hill has issued a Flood Warning for the following rivers in Missouri... 102 River at Maryville affecting Nodaway and Andrew Counties. 102 River at Rosendale affecting Buchanan and Andrew Counties. Platte River near Agency affecting Buchanan County. * WHAT...Minor flooding is forecast. * WHERE...102 River at Maryville. * WHEN...From this afternoon to Monday evening. * IMPACTS...At 18.0 feet, The east bank of the river floods. Water also approaches the village of Arkoe. * ADDITIONAL DETAILS... - At 9:30 AM CDT Sunday the stage was 15.0 feet. - Bankfull stage is 18.0 feet. - Forecast...The river is expected to rise above flood stage late this afternoon to a crest of 18.4 feet this evening. It will then fall below flood stage late this evening. - Flood stage is 18.0 feet. - http://www.weather.gov/safety/flood

Flood Warning

Area
Andrew, MO; Buchanan, MO
Flood Warning issued May 17 at 9:43AM CDT until May 19 at 10:00PM CDT by NWS Kansas City/Pleasant Hill MO

...The National Weather Service in Kansas City/Pleasant Hill has issued a Flood Warning for the following rivers in Missouri... 102 River at Maryville affecting Nodaway and Andrew Counties. 102 River at Rosendale affecting Buchanan and Andrew Counties. Platte River near Agency affecting Buchanan County. * WHAT...Moderate flooding is forecast. * WHERE...102 River at Rosendale. * WHEN...From late tonight to Tuesday evening. * IMPACTS...At 19.0 feet, State Route 48 on the east and west sides of Rosendale is under water. * ADDITIONAL DETAILS... - There is no current observed data. - Bankfull stage is 13.0 feet. - Forecast...The river is expected to rise above flood stage just after midnight tonight to a crest of 19.0 feet early tomorrow afternoon. It will then fall below flood stage late tomorrow evening. - Flood stage is 18.0 feet. - http://www.weather.gov/safety/flood

Flood Warning

Area
Buchanan, MO
Flood Warning issued May 17 at 9:43AM CDT until May 20 at 9:00PM CDT by NWS Kansas City/Pleasant Hill MO

...The National Weather Service in Kansas City/Pleasant Hill has issued a Flood Warning for the following rivers in Missouri... 102 River at Maryville affecting Nodaway and Andrew Counties. 102 River at Rosendale affecting Buchanan and Andrew Counties. Platte River near Agency affecting Buchanan County. * WHAT...Minor flooding is forecast. * WHERE...Platte River near Agency. * WHEN...From Monday afternoon to Wednesday evening. * ADDITIONAL DETAILS... - At 8:30 AM CDT Sunday the stage was 6.4 feet. - Bankfull stage is 20.0 feet. - Forecast...The river is expected to rise above flood stage early tomorrow afternoon to a crest of 22.0 feet early Tuesday morning. It will then fall below flood stage late Tuesday evening. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood

Hydrologic Outlook

Area
Andrew, MO; Nodaway, MO
Hydrologic Outlook issued May 17 at 9:42AM CDT by NWS Kansas City/Pleasant Hill MO

ESFEAX A Hydrologic Outlook is no longer in effect for the... 102 River at Maryville The Hydrologic Outlook for the 102 River at Maryville has been replaced by a Flood Warning. Additional weather and stream information is available at www.weather.gov/kc/.

Flood Warning

Area
Grundy, MO; Livingston, MO
Flood Warning issued May 17 at 8:54AM CDT until May 18 at 9:46PM CDT by NWS Kansas City/Pleasant Hill MO

...The Flood Warning is extended for the following rivers in Missouri... Grand River near Pattonsburg affecting Daviess and Gentry Counties. Grand River near Chillicothe affecting Livingston and Linn Counties. Grand River near Sumner affecting Livingston, Linn, Chariton and Carroll Counties. Thompson River at Trenton affecting Livingston and Grundy Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Thompson River at Trenton. * WHEN...Until Monday evening. * IMPACTS...At 30.0 feet, Backwater along the Weldon River causes flooding at Northwest 22nd Avenue and Route A north of Trenton. * ADDITIONAL DETAILS... - At 6:45 AM CDT Sunday the stage was 28.1 feet. - Bankfull stage is 27.0 feet. - Forecast...The river is expected to rise to a crest of 29.4 feet this afternoon. It will then fall below flood stage late this evening. - Flood stage is 27.0 feet. - http://www.weather.gov/safety/flood

Flood Warning

Area
Daviess, MO; Gentry, MO
Flood Warning issued May 17 at 8:54AM CDT until May 18 at 10:37PM CDT by NWS Kansas City/Pleasant Hill MO

...The Flood Warning is extended for the following rivers in Missouri... Grand River near Pattonsburg affecting Daviess and Gentry Counties. Grand River near Chillicothe affecting Livingston and Linn Counties. Grand River near Sumner affecting Livingston, Linn, Chariton and Carroll Counties. Thompson River at Trenton affecting Livingston and Grundy Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Grand River near Pattonsburg. * WHEN...Until Monday evening. * IMPACTS...At 30.0 feet, Nearly all agricultural land and secondary roads in the Grand River floodplain flood. * ADDITIONAL DETAILS... - At 8:30 AM CDT Sunday the stage was 27.5 feet. - Bankfull stage is 25.0 feet. - Forecast...The river is expected to rise to a crest of 29.1 feet this afternoon. It will then fall below flood stage late this evening. - Flood stage is 25.0 feet. - http://www.weather.gov/safety/flood

Flood Warning

Area
Linn, MO; Livingston, MO
Flood Warning issued May 17 at 8:54AM CDT until May 20 at 12:51PM CDT by NWS Kansas City/Pleasant Hill MO

...The Flood Warning is extended for the following rivers in Missouri... Grand River near Pattonsburg affecting Daviess and Gentry Counties. Grand River near Chillicothe affecting Livingston and Linn Counties. Grand River near Sumner affecting Livingston, Linn, Chariton and Carroll Counties. Thompson River at Trenton affecting Livingston and Grundy Counties. * WHAT...Moderate flooding is forecast. * WHERE...Grand River near Chillicothe. * WHEN...From this morning to Wednesday afternoon. * IMPACTS...At 35.0 feet, U.S. Highway 65 south of Chillicothe is threatened by flood water. * ADDITIONAL DETAILS... - At 7:45 AM CDT Sunday the stage was 22.0 feet. - Bankfull stage is 24.0 feet. - Forecast...The river is expected to rise above flood stage this morning to a crest of 33.7 feet just after midnight tonight. It will then fall below flood stage early Tuesday afternoon. - Flood stage is 24.0 feet. - http://www.weather.gov/safety/flood

Flood Warning

Area
Carroll, MO; Chariton, MO; Linn, MO; Livingston, MO
Flood Warning issued May 17 at 8:54AM CDT until May 22 at 2:58AM CDT by NWS Kansas City/Pleasant Hill MO

...The Flood Warning is extended for the following rivers in Missouri... Grand River near Pattonsburg affecting Daviess and Gentry Counties. Grand River near Chillicothe affecting Livingston and Linn Counties. Grand River near Sumner affecting Livingston, Linn, Chariton and Carroll Counties. Thompson River at Trenton affecting Livingston and Grundy Counties. * WHAT...Moderate flooding is forecast. * WHERE...Grand River near Sumner. * WHEN...Until late Thursday night. * ADDITIONAL DETAILS... - At 7:45 AM CDT Sunday the stage was 19.1 feet. - Bankfull stage is 23.0 feet. - Forecast...The river is expected to rise above flood stage late this morning to a crest of 34.9 feet tomorrow evening. It will then fall below flood stage early Thursday morning. - Flood stage is 26.0 feet. - http://www.weather.gov/safety/flood

Hydrologic Outlook

Area
Carroll, MO; Chariton, MO
Hydrologic Outlook issued May 17 at 8:44AM CDT by NWS Kansas City/Pleasant Hill MO

ESFEAX Grand River near Brunswick This hydrologic outlook is based on the forecast rainfall for the next 24 hours and estimated runoff from earlier rainfall. Crests may vary if actual rainfall or runoff is greater or less than anticipated. Location: Grand River near Brunswick Flood stage: 19.0 feet Maximum Forecast Stage: 19.6 feet at 7 PM Wednesday May 20 Fld Obs Forecasts Location Stg Stg Day/Time Sun Mon Tue 1pm 1pm 1pm Grand River Brunswick 19.0 MSG MSG 6.0 14.8 17.8 Later statements, possibly warnings, may be issued as additional information becomes available.

Flood Warning

Area
Daviess, MO; Livingston, MO
Flood Warning issued May 17 at 8:43AM CDT until May 19 at 4:00PM CDT by NWS Kansas City/Pleasant Hill MO

...The National Weather Service in Kansas City/Pleasant Hill has issued a Flood Warning for the following rivers in Missouri... Grand River near Gallatin affecting Daviess and Livingston Counties. * WHAT...Minor flooding is forecast. * WHERE...Grand River near Gallatin. * WHEN...Until Tuesday afternoon. * ADDITIONAL DETAILS... - At 7:45 AM CDT Sunday the stage was 21.9 feet. - Bankfull stage is 23.0 feet. - Forecast...The river is expected to rise above flood stage late this morning to a crest of 30.8 feet this evening. It will then fall below flood stage tomorrow afternoon. - Flood stage is 26.0 feet. - http://www.weather.gov/safety/flood

Hydrologic Outlook

Area
Andrew, MO; Nodaway, MO
Hydrologic Outlook issued May 17 at 4:42AM CDT by NWS Kansas City/Pleasant Hill MO

ESFEAX 102 River at Maryville This hydrologic outlook is based on the forecast rainfall for the next 24 hours and estimated runoff from earlier rainfall. Crests may vary if actual rainfall or runoff is greater or less than anticipated. Location: 102 River at Maryville Flood stage: 18.0 feet Latest stage: 10.6 feet at 4 AM Sunday Maximum Forecast Stage: 18.1 feet at 7 PM Sunday May 17 Fld Obs Forecasts Location Stg Stg Day/Time Sun Mon Tue 7am 7am 7am 102 River Maryville 18.0 10.6 Sun 4am 10.9 17.1 10.7 Later statements, possibly warnings, may be issued as additional information becomes available.

Flood Watch

Area
Atchison; Nodaway; Worth; Gentry; Harrison; Mercer; Putnam; Holt; Andrew; De Kalb; Daviess; Grundy; Sullivan; Livingston; Linn
Flood Watch issued May 17 at 3:34AM CDT until May 19 at 10:00AM CDT by NWS Kansas City/Pleasant Hill MO

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of north central and northwest Missouri, including the following areas, in north central Missouri, Daviess, Grundy, Harrison, Linn, Livingston, Mercer, Putnam and Sullivan. In northwest Missouri, Andrew, Atchison, De Kalb, Gentry, Holt, Nodaway, and Worth. * WHEN...Through Tuesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Low-water crossings may be flooded. Extensive street flooding and flooding of creeks and rivers are possible. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - Excessive rainfall has occurred in portions of the watch area Saturday evening and night. Additional rounds of storms are expected Sunday night and Monday night, with locally heavy rainfall possible once again. With saturated soils in many areas, any additional heavy rainfall may quickly lead to excess runoff and flash flooding. - http://www.weather.gov/safety/flood

Flood Warning

Area
Daviess, MO; Grundy, MO
Flood Warning issued May 17 at 3:28AM CDT until May 17 at 12:00PM CDT by NWS Kansas City/Pleasant Hill MO

* WHAT...Flooding caused by excessive rainfall is occurring. * WHERE...Northern Daviess County in north central Missouri... Southern Grundy County in north central Missouri... * WHEN...Until noon CDT Sunday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 326 AM CDT, local law enforcement reported extensive flooding across the warned area. Many roads are closed. Use extreme caution traveling across the warning area this morning. Between 3 and 9 inches of rain have fallen. - Some locations that will experience flooding include... Trenton, Gilman City, Pattonsburg, Galt, Laredo, Coffey, Jameson, Mcfall, Tindall and Brimson. - http://www.weather.gov/safety/flood

Flood Warning

Area
Linn, MO; Sullivan, MO
Flood Warning issued May 17 at 1:23AM CDT until May 17 at 12:00PM CDT by NWS Kansas City/Pleasant Hill MO

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Northern Linn County in north central Missouri... Sullivan County in north central Missouri... * WHEN...Until noon CDT Sunday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 120 AM CDT, Doppler radar indicated between 2 and 7 inches of rain have fallen in much of Sullivan and northern Linn counties. Flooding is ongoing or expected to begin shortly in the warned area. - Some locations that will experience flooding include... Milan, Green City, Linneus, Greencastle, Browning, Purdin, Newtown, Humphreys, Pollock, Harris, Osgood, Reger, Winigan, Green Castle and New Boston. - http://www.weather.gov/safety/flood

Flood Warning

Area
Daviess, MO; Gentry, MO; Grundy, MO; Harrison, MO; Mercer, MO
Flood Warning issued May 17 at 1:14AM CDT until May 17 at 12:00PM CDT by NWS Kansas City/Pleasant Hill MO

* WHAT...Flooding caused by excessive rainfall is occurring. * WHERE...Northwestern Daviess County in north central Missouri... Northern Grundy County in north central Missouri... Southern Harrison County in north central Missouri... Southern Mercer County in north central Missouri... Gentry County in northwestern Missouri... * WHEN...Until noon CDT Sunday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 109 AM CDT, the public reported flooding in the warned area. Widespread rainfall totals of 3 to 8 inches have occurred, leading to numerous reports of flooding, especially in Harrison and Grundy counties. Several rural roads have been closed. Please use extreme caution traveling in the warned area this morning. - Some locations that will experience flooding include... Bethany, Albany, Stanberry, King City, Gilman City, New Hampton, Spickard, Darlington, Mcfall, Mount Moriah, Tindall, Modena, Mill Grove and Ford City. - http://www.weather.gov/safety/flood

Lake Wind Advisory

Area
Jefferson; Franklin; Williamson; Wayne
Lake Wind Advisory issued May 16 at 11:42PM CDT until May 17 at 5:00PM CDT by NWS Paducah KY

* WHAT...South winds 13 to 17 mph with gusts up to 25 mph expected on Lake Wappapello, Crab Orchard Lake, and Rend Lake. * WHERE...Crab Orchard and Rend Lake in Franklin, Jefferson, and Williamson County, Illinois and Lake Wappapello in Wayne County, MO. In Illinois, Franklin, Jefferson, and Williamson Counties. In Missouri, Wayne County. * WHEN...From noon to 5 PM CDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft.

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