SUNDAY, MAY 28, 2017

Category: Daily Weather Discussion

More Cold… A Winter Storm by Late Week

The bitter cold continues and we continue to monitor a winter storm system that could bring significant snowfall to our region late this week into this weekend. A Winter Storm Watch has been issued for much of the region including the Sioux Falls area. There is a lot going on in the weather today.

I’ll start with the cold. Frigid temperatures continue to impact most of our region this morning. While most places are actually above zero, strong northwesterly wind gusts have kept the windchill factor below zero for most of the night. Today will be mostly sunny with afternoon high temps in the single digits. Northwesterly wind gusts to 25 mph will keep the wind chill factor below zero for most of the day. Tonight will be clear and cold with lows dropping below zero. A Wind Chill Advisory is in effect for parts of eastern South Dakota and western Minnesota tonight for wind chill values dropping to -20° to -30°.

Now the snow: A Winter Storm Watch has been issued for Friday and Saturday and includes much of central and southern South Dakota and southwestern Minnesota. We will start with a brief, initial shot of snow – up to an inch in a few places – during the day on Thursday. The main event will roll into western South Dakota late Thursday night and move east by Friday morning. Moderate to heavy snow will fall through the day Friday and into Saturday. While it is still a little early to get specific, as of right now I think we could see a band of at least 5 to 8 inches along and north of I-90.

While the snow will end on Saturday, strong northwesterly wind gusts will create blowing snow on Saturday and Saturday night. Keep in mind, temperatures throughout this event will be very cold, so the snow will be light and fluffy and easily blown around.

By Sunday morning, temperatures will drop to near record lows. Sioux Falls could fall to -25° while parts of northern South Dakota get close to -30°. That’s actual temperature, not windchill. The good news is that it does look like we will warm up a bit next week.

Stay tuned for the very latest on this developing winter storm system. I will have updates and get more specific with snow totals and the track of the storm as new information rolls in.

Cold Continues… Snow Possible Late this Week

Bitterly cold temperatures will continue to plague the region over the next several days. Today will be mostly sunny with highs ranging from the low teens in Sioux Falls to the mid teens across central South Dakota. Temperatures will stay well below average through most of the week and then they will warm up slightly ahead of our next system.

Our next weather system has the potential to trump the cold as our big weather story of the week. Snow will develop late Thursday and Thursday night and continue through Friday and into Saturday. Several inches of accumulation will be possible followed by strong wind and blowing snow. While it is way too early to get specific with the snow accumulation forecast, I think that some parts of our KSFY coverage area could get at least 4 to 6 inches. Some models are suggesting even more. Again, that is very preliminary and there is a lot that could change throughout the week. Stay tuned. I’ll have updates as the system develops.

After that system passes, we’re going to get even colder! By Sunday morning, parts of northern South Dakota could drop to near 30 below zero.

Hang on… It’s going to be an interesting week!

Rain & Snow Today… A Warm, Sunny Weekend AheaD

The rain, freezing rain and snow has ended in most places. Everything is still wet though, and with temperatures hanging around the freezing mark, there will be slippery roads and sidewalks this morning. Take your time and be careful.

Today will be cloudy and cool with highs in the mid to upper 30s. Thanksgiving day will be cloudy and slightly warmer with a chance of light rain and snow in the afternoon and evening. We could get a little (less than a half inch) sloppy wet snow in Sioux Falls. Parts of northern South Dakota into southwestern Minnesota could get an inch or more.

Black Friday and the weekend will be sunny and warmer. High temps will reach the mid to upper 40s on Friday, Saturday and Sunday. Parts of central South Dakota will warm into the 50s. Another system will roll in late Sunday, bringing rain Sunday afternoon followed by rain and snow Sunday night, Monday and Tuesday. If you are going to be traveling this weekend and plan to return on Sunday, keep an eye on the weather because roads could get icy by late Sunday afternoon.

Strong Storms with Heavy Rain Today

Heavy rain is falling across parts of south central and southeastern South Dakota this morning. A Flash Flood Watch remains in effect for parts of southeastern South Dakota and southern Minnesota through this morning. Thunderstorms will continue to produce rainfall amounts of 1 to 3 inches with locally higher amounts of 4 or more inches.

Rain will exit from west to east by mid morning, but showers and thunderstorms will continue to be a possibility later today, tonight and again tomorrow. More heavy rain will be possible with the additional threat of a few strong to severe thunderstorms later today into tonight.

The weather will calm down late Wednesday and leave us with a mostly sunny and mild day Thursday. Scattered showers and thunderstorms will return late Thursday night and Friday. As of right now, I think the weekend will be mostly sunny with high temps in the 70s.

Hot & Humid… Strong Storms Later Today & Tonight

Today is going to be hot and humid. High temperatures will range from the upper 80s to low 90s with the dew point hovering somewhere in the upper 60s. That will take the heat index into the mid to upper 90s this afternoon.

A powerful cold front is rolling into the very northwestern corner of South Dakota this morning. That front will blast across the Dakotas and into Iowa and Minnesota late today and tonight, bringing good chance of showers and thunderstorms. Storms will develop across central and northern South Dakota late this afternoon into this evening and move east through the night. Our latest models are suggesting that storms will approach the Sioux Falls area by mid to late evening. Some storms could be severe with large hail and damaging straight-line wind gusts being the main threat. The tornado threat is relatively low however, an isolated tornado or two is possible. Timing on storms could change, so stay with me throughout the day for updates. Some places could get heavy rain. One-half inch to an inch or more is possible through tomorrow night.

Tomorrow will be mostly cloudy and cooler with scattered showers and thunderstorms likely. The best chance of severe weather tomorrow will be across Nebraska, Iowa and south central to southeastern Minnesota.

The rain should be out of here by the weekend. Saturday and Sunday will be partly cloudy to mostly sunny and quite a bit cooler. Highs will only reach the upper 60s to low 70s on Saturday, warming to the mid 70s on Sunday. The cooler weather will not last long, we will bounce back into the 80s by Monday and stay there through most of next week.