After a several weeks of lower than average rainfall, the heavens opened up and made for a very wet 24-48 hours across a large portion of Kansas and Missouri. A slow moving upper storm system drew copious moisture from the Gulf of Mexico and Eastern Pacific, which primed the atmosphere for heavy rainfall. As an upper system moved gradually eastward from the desert southwest into the lower Mississippi Valley, deep level moisture streaming northward over a frontal system moving across the southern plains evolved into a large area of rain with embedded thundestorms.
Rain and thunderstorms developed around midnight Thursday, then expanded in areal coverage and intensity. Several bands of thunderstorms developed and tracked over the same region, setting the stage for excessive rainfall from southeast Kansas into central Missouri. By sunrise on Thursday, many locations from east central Kansas into central Missouri were reporting rainfall totals between one and two inches. Scattered reports of water innundated low water crossings began to be reported by early Thursday morning, prompting the issuance of flash flood warnings and flood advisories from east central Kansas into central Missouri. Additional rain and thunderstorm activity throughout the day on Thursday allowed these rainfall totals to climb, and by sunset Thursday, three to five inch rainfall totals were common south of a line from La Cygne, Kansas through Warrensburg, Missouri to Fayette, Missouri. Even heavier rainfall was reported across southeast Kansas and southern Missouri. A summary of these rainfall amounts can be found at the National Weather Service Springfield page.
The excessive rainfall caused several area rivers to rise at or above flood stage including: Blackwater River near Valley City and Blue Lick; Big Creek near Blairstown; South Grand River near Urich; Petite Saline near Boonville; Moniteau Creek near Fayette; Lamine River near Otterville; and Marais Des Cygnes River at Osawatomie, La Cygne and Trading Post. Most of these rivers rose or are expected to rise into moderate flood categories. Most rivers are expected to crest during the day or evening on Friday, then will start receding within their banks.
For the latest river stage information in your area, please visit the Advanced Hydrologic Prediction Service (AHPS) website.
Rainfall totals from 7 am Wednesday, October 7 through 7 am Friday, October 9th
(click on image for greater resolution image)
|Boonville 2 SE||5.77|
|Trading Post, KS||3.76|
|Blue Lick, MO||3.51|
|Rich Hill, MO||3.42|