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The week ahead: Calm start, finish -- tumultuous middle

Jason Samenow @ 8:30 AM

The week will begin with beautiful sunshine. But a very strong cold front will bring rain, wind and the threat of frost late in the work week before conditions settle for the weekend.

Today - Columbus Day

Nice Day StampPicture perfect. High pressure will promote full sunshine and very pleasant temperatures. High temperatures will range from 75 to 80 degrees with light northwesterly winds. Tonight, it will be clear with lows 45-52 (suburbs to city).

Week at a Glance

Warmest Day: Today (High of 79)
Coolest Day: Friday (High of 55)
Dry Periods: Monday-Wednesday morning and Friday afternoon-Sunday.
Rain Chances: Wednesday morning through Friday morning (intermittently)
The Week's Wild Card: Thursday's forecast. There are uncertainties about the timing of an intense frontal passage, the probability of strong thunderstorms and then how much temperatures will drop and the amount of post frontal precipitation.
Climatological Average High/Low: 71-68/52-49


Forecast Confidence: High-Very HighSunny and warm. Despite the passage of weak cold front early in the morning, it will remain on the mild side. Skies should be partly to mostly sunny with highs in the mid to upper 70s. Tuesday night will be clear, with lows 47-53 (suburbs-city).


Forecast Confidence: MediumIncreasing clouds, mild. Slight shower risk. A warm front will move through the area ahead of the strong cold front in the Midwest. A period of showers is possible (30% chance) during the day, although the timing is not certain. High temperatures should be mild -- in the low to mid 70s. Overnight, there may be another period of showers as the cold front draws nearer (50%), with lows in the low 60s.


Forecast Confidence: MediumShowers and thunderstorms, then colder. The cold front will move through the region -- most likely during the afternoon hours -- triggering showers and thunderstorms. High temperatures should be 65-70, but will fall quickly in the wake of the front Thursday night. Overnight Thursday, there may be some post frontal chilly rain, with temperatures falling into the 40s.


Forecast Confidence: Medium-HighBreezy and cool. Frost at night? In the wake of Thursday's front, the chilliest air of the season will move in. Expect partly sunny skies, breezy northwest winds and highs in the mid 50s. Overnight, the season's first frost is possible in the suburbs, with lows 32-39. Downtown, lows should be around 40.

The Weekend

Forecast Confidence: Medium-HighModerating temperatures. High pressure building in from the southwest will allow temperatures to warm a bit each day. On Saturday, we should have mostly sunny skies, with highs in the low 60s. Saturday night will be crisp -- with lows 36-44 (suburbs to city). On Sunday, as high pressure moves to our east and winds turn southerly, we may near 70 degrees for an afternoon high.

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