THURSDAY, MAY 28, 2015
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Severe Storms are Possible This Afternoon/Evening

Severe thunderstorms are possible across Southeast South Dakota (including Sioux Falls), Southern Minnesota and Northern Iowa this afternoon and evening. The primary threat will be large hail, however, a few tornadoes are possible. Stay tuned for updates as weather develops throughout the day. 

I tweet and facebook all warnings. Follow me @ShawnCable or see tweets from our entire weather team, interactive doppler and more here: http://www.ksfy.com/weather/alert

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A Cool, Wet Week Ahead

I hope you had a chance to enjoy the fantastic weather this past weekend. As we kick off the new week, we are looking forward to a much needed change in our weather pattern. The entire week ahead will be quite a bit cooler with scattered showers likely just about every day.

Today will be cloudy with scattered showers. An isolated thunderstorm is possible along and south of I-90, but I do not expect anything severe. High temperatures will be in the upper 40s with northeasterly wind gusts to 20 or 25 mph. Scattered showers are likely tonight and again tomorrow. Overall, rain will not be terribly heavy the next couple of days. Most places will get one to two tenths of an inch. Further north where temperatures are colder, scattered showers may come in the form of snow showers, so don’t be surprised if you see some white. I don’t expect any significant accumulation.

Wednesday will be mostly cloudy with drizzle. Thursday and Friday will bring another chance of rain. This time the rain could be a bit heavier. That’s still a few days away… I’ll keep an eye on things and let you know more specifics about the late-week rain potential as we get closer.

As of now, it looks like we’ll bounce back nicely by the weekend. Saturday and Sunday will be partly cloudy with highs back in the 60s.

Rain forecast through 6 pm Monday, April 6, 2015 (6Z RPM)

Rain forecast through 6 pm Monday, April 6, 2015 (6Z RPM)

Long-range rain forecast for Thursday and Friday (as of Monday, April 6, 2015)

Long-range rain forecast for Thursday and Friday (as of Monday, April 6, 2015)

Severe Storms Possible Today

Today will be warm and windy with our first chance of strong to severe thunderstorms this season. Afternoon temps will reach the upper 70s in Sioux Falls with upper 70s to low 80s possible south and east of Sioux Falls. Wind will be from the south gusting to 30 mph, shifting to the west and eventually to the northwest by late afternoon or early evening.

A cold front moving across the region will trigger thunderstorms by mid afternoon. As of right now I think the best chance of thunderstorms will be along and east of a line that extends from Marshall, MN to Sioux Falls to Yankton to O’Neill, NE. Storms will develop by mid to late afternoon and move east across southeast South Dakota into northwest Iowa and southwest Minnesota. While an isolated tornado is possible, the dynamics with this system are much more suited for large hail and damaging straight-line wind gusts. That will be the primary threat later today into tonight.

If things happen the way I think they will right now (at 7:45 Wednesday morning) storms will develop just southeast of Sioux Falls between 4 and 6 PM. If, however, the front slows down, storms could develop right over or just northwest of Sioux Falls. Stay tuned for updates througout the day. Follow me on Twitter or check out my Twitter feed for the most immediate updates and for watches and warnings as they’re issued. http://www.twitter.com/shawncable