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Jan
07

Saying So Long To Snowpack This Week

By · January 7, 2013 at 12:47 pm

For now central Indiana remains covered in nearly 3″ of snow.  But an impressive January thaw this week will produce major melting.  This morning lows were the coldest they’ll be for sometime.

In fact, Terre Haute and Columbus briefly dropped into the single digits.  The combination of a clear sky, light wind and moisture from melted snow this weekend produced localized areas of freezing fog.  Enough in some communities to prompt school delays.

You can see the haze left behind in Greenfield in the picture above.  It will be neat to contrast this particular WeatherBug site with later this week as the snow melts away.

1km visible satellite imagery this morning clearly shows the snow field draped across Indiana and Ohio.

The snowpack will keep daytime highs seasonably cold in the mid 30s this afternoon, despite brilliant sunshine.

Lows tonight will drop into the lower 20s around Indianapolis, and upper teens in east-central Indiana.  Moisture from melted snow could help create new areas of freezing fog by Tuesday morning.

Highs Tuesday will be near 40 areawide, and should eclipse that mark in southern Indiana.

This is all part of major pattern shift for the eastern U.S., as unseasonably warm air builds underneath ridging in the upper levels.  Temperature anomalies Friday and Saturday will be some 25° above normal… and highs will make a serious charge at 60°+ Saturday!  The trade-off will be several waves of rain, and possibly thunder.

The first wave of low pressure/moisture arrives during the second-half of Thursday.  A second, and perhaps stronger, system arrives Saturday.  Combined the two have 1″-2″+ rainfall potential… so we’ll watch river levels closely with the expected snow melt.

Quite a week as temps go from the teens this morning to near 60° Saturday.  Sunday highs will occur prior to sunrise, and progressively fall as a frontal system moves through the state.  Have a great day and thanks for reading the blog.

Sean Ash – Twitter and Facebook

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