Following Sunday’s heavy rain in the Upper Midwest and with more significant precipitation in the forecast, the National Weather Service in St. Louis has issued a flood warning for locations along the Mississippi River, including Hannibal, Louisiana and Clarksville. However, as of now only minor flooding is anticipated.

Following Sunday’s heavy rain in the Upper Midwest and with more significant precipitation in the forecast, the National Weather Service in St. Louis has issued a flood warning for locations along the Mississippi River, including Hannibal, Louisiana and Clarksville. However, as of now only minor flooding is anticipated.

According to the NWS, the flood warning takes into account rainfall that’s already fallen and an additional 1 to 2 inches of rain that is expected across the river basin by Monday night. As of 4:15 p.m. Monday, the river in Hannibal stood at 16.45 feet. Technical flood stage is 16 feet. The river, which has been slowly rising in recent weeks, was initially forecast to crest at 18.1 feet by early Thursday afternoon. However, by late Monday morning, the NWS had scaled back the expected crest in Hannibal to 17.2 feet Wednesday night. At 17 feet, the John Hay Recreation Area on the east side of the Mississippi River, inside the Sny Levee, begins to flood. No significant flood preparation is anticipated in Hannibal based on a 17.2-foot crest. At 18 feet, the city’s gate wells will be shut down to prevent sewers from backing up. Also, at that level pumps are set to standby. Unless the predicted crest goes higher, none of the city’s five flood gates will need to be installed. When a crest prediction of 20.5 feet or more is forecast, the gates on Hill and Center streets go in. The remaining three gates - two on Broadway and one on South Main - are placed when the crest is forecast at 21.5 or more. Hannibal is not the only river community that will experience minor flooding in the days ahead. Projected crests by the National Weather Service are:

• Canton, 14.3 feet Thursday (14 flood stage).

• Quincy, Ill., 17.1 feet Thursday (17 flood stage).

• Saverton 16.1 feet Thursday (16 flood stage).

• Louisiana 16.1 feet Thursday (15 flood stage).

• Clarksville 26.5 feet Thursday (25 flood stage).

All those crests are less than had been projected on Sunday.

Other area rivers are not expected to leave their banks. The North River at Palmyra hit a crest of 9.82 feet early Monday and is now falling. Flood stage is 13 feet. The North Fabius River near Ewing is predicted to crest at 8.7 feet at 1 a.m. Monday. Flood stage is 11 feet. The South Fabius River near Taylor is predicted to crest at 5.9 feet at 1 p.m. Tuesday. Flood stage is 9.5 feet. The Salt River at New London reached a crest of 6.67 feet at 5:15 p.m. Friday and has since dropped to below 4 feet. Flood stage is 19 feet. 

Rainfall totals in Northeast Missouri over the past 24 hours ranged from around 0.50 of an inch to almost 2 inches. Through early Monday morning the NWS reported the following totals: Canton, 1.92; Louisiana, 1.50; Bowling Green, 1.39; Monroe City, 1.34; Clarksville, 1.13; Steffenville, 0.95; Shelbina, 0.92; Saverton, 0.90; Hannibal, 0.88; Edina, 0.87; Vandalia, 0.67; Clarence Cannon Dam, 0.60.

In West Central Illinois, Lock and Dam 21 at Quincy logged 2.38 inches of rain as of 6 a.m. Monday.