Category: Arctic Cold

Another Bout Of Rush Hour Wintry Mix; Longer Range Talk…

We think we’re dealing with another round of light freezing drizzle and a wintry mix for the Thursday morning commute.  Plan to allow extra travel time.

Forecast radar Thursday morning suggests freezing drizzle and a light wintry mix is in play across central Indiana.

Forecast radar Thursday morning suggests freezing drizzle and a light wintry mix is in play across central Indiana.

There’s some longer term data that’s in stark contrast from what a positive PNA should produce (yet alone a strong positive PNA).  Typical positive PNA pattern should promote an eastern trough and associated colder than normal pattern as drawn below:

PositivePNA

Needless to say, we disagree strongly with the NAEFS and GFS ensembles:

2014120312_054@007_E1_north@america_I_NAEFS@TEMPERATURE_anomaly@probability@combined@week2_186

Regardless, the future will tell!  

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Tuesday Morning Wintry Mix….

Our high resolution models continue to be rather aggressive on the idea of a wintry mixture of snow, sleet, and freezing rain falling across central Indiana Tuesday morning. The HRRR…

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Challenging Pattern…

Mon.

Tue.

Wed.

Thr.

Fri.

Sat.

Sun.

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Wintry Mix For Some…Recall we mentioned last week that we’d have to keep close tabs on the week 1 (this week) situation as the pattern looked to present challenges (cold highs to the north and an active storm track south).  That’s certainly the case as today is a perfect example of model data struggling on the northern extent of the precipitation and the associated combination with colder air moving south.  This morning we’ve had reports of sleet in the Avon and Fortville communities.

We’ll forecast cloudy skies today with best chances of light wintry mix impacting the I-70 corridor and points south.  Another little “ripple” of energy will move along the frontal boundary south of the region and provide the chance of a wintry mix this afternoon into tonight.

Tuesday and Wednesday will turn quieter after the chance of morning flurries Tuesday morning.

Late Week System…We’ll keep close eyes on another storm system Thursday.  Once again, the fine line between liquid, freezing, and frozen precipitation forms will lie across our immediate region.  For now we’ll simply forecast a wintry mix of snow, sleet, and rain Thursday afternoon switching over to a cold rain Friday.  Stay tuned.  And deviation south or north will have an impact on precipitation type.

Half And Half…The opening to the new weekend looks to be a wet one as an active storm track continues.  We’ll then introduce drier air Sunday.

Upcoming 7-Day Precipitation Forecast:

  • 7-Day Rainfall Forecast: 0.50″ – 0.75″
  • 7-Day Snowfall Forecast: Dusting 

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Catching Up And Looking Ahead…

From the IndyWx.com family to yours, we wish you a very happy Thanksgiving! Thank you for taking the time to read our content daily and for all of your support…

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Happy Thanksgiving; Important Travel Weekend…

A nor’easter is making a mess of travel (in the air and on the road) up and down the east coast. Also note the clipper system digging through the mid…

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