With the exception of a few thunderstorms that rolled through on Monday, we have been fairly dry in central Illinois. About a week ago a large center of high pressure set up over the Atlantic coast and has dominated our weather pattern ever since.
Highs in the 70s and 80s have been the rule rather than the exception, and the high pressure has blocked any appreciable rain from affecting our area. The pattern will change as the high pressure shrinks back and out of our area and the storm system that has dumped 6-8″ of rain over areas to our south and west will spin some showers and thunderstorms up into central Illinois from the south.
Most of central Illinois will see anywhere from 1/2″ to 3/4″ of rain this afternoon and evening. Expect the precipitation to start in earnest between 11am and 1pm.
A very slow moving storm system has been dumping rain over parts of Oklahoma, Arkansas, Missouri and Kansas over the past few days. From the 19-21st, northeast Oklahoma has recorded as much as 7.9″ of rain. Southeast Kansas and southwest Missouri have recorded similar amounts, as much as 6″ in some places.
Most of the western half of Missouri is under a flood warning and that could continue as there is a chance for an additional 1″ of rain to fall through Friday afternoon. Minor flooding is occurring along the Blackwater River near Valley City, MO. Flood stage for the river at this point is 22 feet, it is currently at 23.8 feet.
Though some areas are experiencing flood conditions, the rain has been beneficial for most other areas. Parts of southern Missouri had been abnormally dry and these rains will help them return to a more favorable moisture content for Spring planting.