Surges of cold air will engulf the central and eastern states this week as a dip in the jet stream dominates to the east of the Rockies.
As a result, we will see a widespread area of below-average temperatures spreading south and east during the week ahead. We have the details on this late-October chill, including where we could see a frost, freeze and even some snow.
(MAP: Current Temperatures)
Late-October Chill
Wednesday's Highs
Thursday's Highs
Friday's Highs
The change to a colder weather pattern began with an initial blast of chilly air that moved into the Upper Midwest and Great Lakes this past weekend.
Now another shot of even colder air is diving south, which has dropped temperatures 10 to 20 degrees below average across most of the Midwest. This latest blast of cold air will also surge into the southern and eastern states by Wednesday. By late week, another reinforcing shot of cold air will take over the central and eastern states. The three temperature forecast maps to the right illustrate the falling temperatures from the start to the end of the week.
In the Midwest, highs in the 40s will keep Chicago and Minneapolis shivering throughout the new work week.
Portions of North Dakota, northern Minnesota, northern Wisconsin and northern Michigan will not get out of the 30s at times through Thursday.
In the South, afternoon temperatures in the 50s are possible Wednesday and Friday in parts of Tennessee, northern Arkansas, northern Mississippi, northern Alabama, northern Georgia and North Carolina.
The Northeast will see highs in the 40s and 50s for the second half of the week. This is around 5 to 15 degrees below average for late October.
Of course, morning temperatures will be even colder. Many locations in the Midwest will see lows in the 20s and low 30s at times through the week ahead. By late week, lows in the 30s are possible as far south as northern Georgia and northern Alabama.
Some cities will see their first frost or freeze of the season this week, particularly from the southern Great Lakes to the Ohio Valley, middle Mississippi Valley, middle Missouri Valley and the Tennessee Valley. This includes Indianapolis, Ind., Louisville, Ky. and Nashville, Tenn. On Tuesday morning,Chicago recorded its first official freeze of the season.
(MAP: Frost/Freeze Alerts)
Snowflakes Flying in the Midwest, Great Lakes
Wednesday's Forecast
Thursday's Forecast
With the cold air in place, we've seen some snowflakes flying through the air near the Canadian border the past two days.
International Falls, Minn. saw its first measurable snow of the season this past weekend. Snowflakes were also observed inFargo, N.D. and Duluth, Minn.
On Tuesday morning parts of northern Iowa, including Cedar Rapids and Waterloo, saw their first snow of season. Very light snow also fell in the western suburbs of Chicago early Tuesday afternoon.
Tuesday night, a few wet snowflakes could mix in with the rain over parts of northern Indiana, but accumulations are not expected.
(MORE: 48-Hour Snowfall Forecast)
By Wednesday and Thursday, we will see some bouts of lake-effect rain and snow showers downwind of the Great Lakes. The best chance of snow and possible accumulations will be in the higher elevations.
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