A late season storm will bring rain and snow on Monday night and Tuesday morning.
Accumulations will mostly be limited to the northern Black Hills, the Big Horns, and the Bear Lodge Mountains. That's the best chance of seeing 2-6" with elevations playing a big part in how much snow sticks. Northwestern South Dakota and southeastern Montana could also see 1-3" in some of the higher terrain. A change in the forecast by a couple of degrees could make a big change in accumulations. Whether it falls as rain or snow, there's plenty of moisture to work with. Parts of NW South Dakota could see 1/2" to 1" of welcomed moisture. We'll see much south of I-90.
Snow isn't the only issue... as winds gusting up to 50mph will reduce visibility at times. Rapid City will see some of the strongest winds, but with much less snow. That area has a WIND ADVISORY posted. The area just north and west of there where snow will be heaviest is under the gun for a WINTER WEATHER ADVISORY.
Most of the showers will end on Tuesday morning with the Black Hills area dry by at least the afternoon. Behind this late season winter storm, temps will be relegated mostly to the 40s... leaving the day far and away the coolest of the week.
Warmer and drier air builds in for the remainder of the week. Remember when we were excited to see 60s in the forecast last week? Those 60s don't look as nice as the multiple 70s populating the extended forecast this week. Saturday will see temps make a run at 80 just east of the Black Hills.
Rapid City Airport
Normal High: 61°
Normal Low: 34°
Precipitation for Today: 0.06" (by 6pm)
Precipitation for April: 1.42" (+0.20")
Precipitation for 2018: 3.71" (+0.84")
Snowfall Today: 0.0"
Snowfall for April: 17.1" (+10.5")
Snowfall Since July: 60.1" (+21.4")
Sunrise: 5:56 a.m.
Sunset: 7:46 p.m.
Old Records for Tuesday, April 24th
Rapid City Airport
High: 89° (1962)
Low: 22° (2013)