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Rain Threat | Southern Plains to Great Lakes

Cold front to trigger weak thunderstorms across Central U.S.


Staff Writers

Wednesday, November 15, 2017, 9:46 - A Colorado Low will be the late-week focus for some active weather through the eastern half of the country, bringing with it the potential for everything from showers and weak thunderstorms to snow.

An active storm pattern sets up over the nation's midsection this week, sending several shots of wet weather east of the Mississippi as the week progresses, with the strongest system showing up to see the week out.

See when rainy weather may impact your plans as we take a look at the week ahead.


Behind the Weather: How the Great Lakes contribute to dangerous winter conditions


Weather Highlights:

  • Wednesday system brings showers from the mid-Mississippi Valley through the Great Lakes
  • Risk of snow on the back edge of this system Wednesday into Thursday for the Upper Midwest/Michigan UP
  • Stronger system moves from the Plains on Friday
  • Locally heavy rainfall along a cold front stretching from Texas to the Canadian border
  • Potential for some weak, isolated thunderstorms from the Ark-La-Tex to the Ohio Valley
  • Slight chance of mixed precipitation ahead of the system into northern New England, along with some wraparound lake-effect snow after the system passes

A low passing by in central Canada will send a cold front cutting through the mid-Mississippi Valley and Great Lakes region, spreading rain showers from northern Wisconsin to northern Arkansas on Wednesday. The strong surge of mild air from the Gulf of Mexico preceding the front will push Wednesday's high temperatures into the low 50s as far north as Chicago - much more in line with seasonal temperatures than the deep freeze of last weekend.

Click play to watch below: Storm track and timing



This also means that, for the most part, this system brings rain rather than snow as it sweeps eastward into New England on Thursday, though the Upper Midwest may see a brief shot of snow on the back edge of the front, particularly close to the Great Lakes, as winds from the north bring cold air back south in the wake of the low. Ahead of the system, a few snow showers or some wintry mix are also possible for the Adirondacks and higher elevations of northern New England.

The stronger system moves in to end the week, as a strong low develops out of the Plains and becomes a double-barreled system with a low moving through southern Canada. This system brings with it the risk of heavier showers (isolated weak thunderstorms) for parts of the Midwest and Mississippi Valley for Friday.

Precipitaion forecast through Saturday. Courtesy: QPF/WPC/NWS


STORM TOOL KIT: Be prepared for severe weather with The Weather Network's online essentials: ALERTS | LIVE RADAR | UPLOAD PHOTOS/VIDEOS | LATEST NEWS | FOLLOW ON TWITTER | HIGHWAY FORECAST | AIRPORT FORECAST


Early forecast model indications are a band of strong thunderstorms will develop along and ahead of the front from the Ark-La-Tex through the Ohio Valley, with the main threat from these storms being damaging winds -- although as the week progresses, it's looking less an less likely that there will be any. Flash flooding is also a concern as locally heavy rainfall pours down on already-saturated ground.

Click play to watch below: Temperature pattern



Stay with us here at The Weather Network as we refine the details of these active weather systems as the week goes on. Weather advisories can be monitored on our ALERTS page, here

Details on the extended lake-effect snow event, can be found here.



Watch below: Your long range forecast



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