Even Colder Temperatures are Ahead This Week in the Midwest, East

Linda Lam
Published: December 11, 2017

If you think it's cold now, just wait.

Even colder temperatures are expected in the week ahead.

A notable pattern change took hold of the U.S. last week and will continue to dominate the weather across the country the next several days. Some areas may experience their coldest temperatures of the season so far.

(MORE: Winter Storm Central)

This upper-level weather pattern features a southward dip in the jet stream, or upper-level trough, over the eastern U.S., while a northward bulge in the jet stream, or upper-level ridge, has become established over the West.

The coldest temperatures are indicated by the purple contours.

This southward dip in the jet stream will allow rounds of cold temperatures to slide southward into portions of the eastern half of the U.S. at times during the week ahead.

The cold blasts this week are anticipated to be colder than last week, possibly helped by an increase in light snow cover in portions of southern Canada, the Midwest and the Northeast.

(MORE: When is the Coldest Time of Year?)

Cities that may see the coldest conditions so far this season during the week ahead include:

  • Milwaukee: coldest temperature of the season so far was 16 degrees on Nov. 10. The temperature could drop near or a few degrees below that mark on Tuesday or Wednesday morning.
  • Chicago: dropped to 18 degrees on Nov. 10, but lows in the mid-teens are anticipated Wednesday morning.
  • Indianapolis: temperatures dipped to 23 degrees on Nov. 22, and lows in the mid-teens are expected Wednesday morning.
  • Pittsburgh: coldest temperature so far this season was 17 degrees on Nov. 11, and temperatures may drop to the lower teens Wednesday morning.
  • Philadelphia: the low temperature dropped to 23 degrees on Nov. 11, and lows may drop to near 20 degrees later this week.
  • Boston: the coldest temperature so far has been 22 degrees on Nov. 28, but lows in the mid-teens are currently anticipated by late this week.

Forecast Lows

Overall, lows in the teens and 20s will be widespread across the Midwest and into the Northeast, with lows in the single-digits and even subzero at times this week near the Canadian border.

(MAPS: 10-Day High- and Low-Temperature Forecast)

High temperatures will also be colder than average from the Midwest to the East at times this week. This translates to highs struggling to reach the 20s and 30s, with teens at times in the upper Mississippi Valley, upstate New York and northern New England. 

Keep in mind that the wind will make it feel even colder than what the thermometer indicates.

(MORE: What Does Wind Chill Really Mean?)

Forecast Highs

Chilly conditions will continue to be felt in the South, as well. Much of the South will see highs only in the 40s and 50s this week. Some spots in the higher terrain of Georgia, Tennessee and the Carolinas may not get out of the 30s.

Even Florida will feel the chill, with highs Wednesday only in the 50s in central Florida and the 60s in southern Florida.

(MORE: Winter Storm Benji, a Recap)

Temperatures will drop below the freezing mark at times this week through the Southeast and into the Florida Panhandle. Lows in the 40s may reach as far south as Miami Tuesday and Thursday mornings.

Forecast Lows

With the cold air in place, there will be chances for wintry precipitation over the week ahead. This includes several rounds of lake-effect snow near the Great Lakes.

(MAPS: Weekly Planner)

In addition, snow will sweep through parts of the Northeast and Appalachians early this week.

The good news is: many of these areas that are shivering this week will get a brief respite from the cold this weekend as milder temperatures overspread the Midwest, South and parts of the East.

(MORE: Pattern Change to Bring Milder Temperatures to Midwest, South by the Weekend)

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