Rain will continue to move in from west to east tonight as temperatures cool to the 30s to lower 40s.
Continued incoming cooler air on Monday means even cooler afternoon highs, only reaching the 40s to 50s under a cloudy to mostly cloudy sky as rain keeps moving west to east tomorrow. Rain amounts should be light for central and east KELOLAND as broad brush rain amounts are well under a quarter inch, just a few hundredths are projected for east KELOLAND. But the west could see upwards of a quarter to half inch with locally higher amounts.
The weather pattern changes a bit on Tuesday. We’ll still be cool and cloudy but an area of low pressure will move through the southern Midwest and it’s going to bring some showers and thunderstorms to the central US. Severe weather and flooding is likely to our south but because we will stay on the north side of the low, we are looking at a broad area of rain to move through.
It looks like the rain will begin to move in Tuesday and will last through Wednesday night, exiting most of the area Thursday morning but western SD may still have some lingering precipitation. The rain will come from the southwest so the farther north you are in KELOLAND, the later in the day on Tuesday, you’ll see the rain arrive.
Rain amounts from now through Thursday will be quite impressive with the most rain falling in the southeast. Right now, computer model rainfall projections give the south-central and southeast regions upwards of one to one and a half inches of rain with locally higher amounts. The west would see about a half inch to a little over an inch, and the north would see the least amount, at around a quarter to half inch.
Temperatures through this event will be cool for early May, only topping out in the 40s and 50s, cool enough snow would be likely in western SD and the Black Hills. But next Friday and the weekend brings back the warmer 50s to 60s and dry skies.