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13 WTHR Indianapolis | Indianapolis Local News & Weather

Pattern Change Ahead This Weekend

Pattern Change Ahead This Weekend

Patience rewarded today as that overcast finally dissipated for a brighter finish and highs near 50°.

This continues the string of above average highs for the month of January... and we'll tack-on a few more this week before a significant pattern change.

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It's been the warmest January 1st-13th in Indianapolis since 2005 with the average monthly temperature nearly 12° warmer than norm. The snow season has been wimpy too... with just under 11".

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Long-range signals continue to advertise a flip in the upper pattern arriving this weekend as a trough digs southward into the eastern U.S. This allows seasonably bitter to get dislodged from the polar region and leads to a stretch of days colder than average.

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This transition carves out a winter system that moves across the Ohio Valley/Great Lakes Friday into Saturday. It's still early in the forecast game, but a period of snow/sleet remains possible in Central Indiana Friday evening before a switch to rain as rapid warming occurs once the low strengthens around the Michiana border.

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At this time we don't envision significant travel impacts, but this could change based on the storm track. Confidence is high on lows near single digits Sunday/Monday/Tuesday mornings and wind chills dipping into sub-zero territory.

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