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October 2012 Observations & Discussions


earthlight

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Has a low of 36 degrees. Much cooler than forecast.

Was going to post this - my forecast low was 45 as of last night, ended up at 37.3F this morning with scattered frost on the ground. That makes 3 consecutive mornings in the 30s here. Should really hasten foliage change.

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Didn't break 50 here in Astoria.

Down to 47 here. The weak winds from earlier in the night helped out, finally. They've stayed up like every other night and that in combination with the wind of the river, Long Island Sound has kept my temps higher than they should be.

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The 12z NAM has an embedded low-topped squall line moving through NYC area, with the warm front, during rush hour tomorrow morning. Also a decent LLJ, hitting the shores:

That should be fun to drive in tomorrow. Though we've had luck lately with decent commutes on days that hosted a lot of rain.

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It looks like that as we head into November on the 12z GFS, a pretty strong cool shot comes in after the the mid range warm spell. The GEFS agree with the Operational on such an occurance (though less anomalous and smoothed out).

The Mid Range Warm Up:

http://raleighwx.americanwx.com/models/gfs/12zGFS6-10day850mbTempAnomalyNA.gif

The Long Range Cool Down:

http://raleighwx.americanwx.com/models/gfs/12zGFS11-15day850mbTempAnomalyNA.gif

The GEFS in agreement with the Operational on such a cool down:

http://raleighwx.americanwx.com/models/gfsensemble/12zENS11-15day850mbTempAnomalyNA.gif

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I posted my thoughts about the pattern going forward, and I think we're looking fairly mild through early November. Some signs of a cold outbreak once into the first week of November, but the MJO may not make phase 2 (or be strong amplitude in that phase). Also, the PNA is negative and is more strongly correlated to our weather at this time of year as I illustrated here.This pattern wouldn't be bad a couple months from now; only problem is, can we keep the blocking until then? Not so sure about that one yet..

http://www.nymetrowe...tinue/#more-936

http://www.lightinthestorm.com/

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The Western Atlantic Ridge has been the dominant player for us this fall so far.

Maybe we can capitalize on the warmer SSTs by providing more fuel for low formation off the coast. If still there in a couple months that should produce a nice baroclinic zone.

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