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Sunday's Screaming Southeaster


CT Rain

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Hey @powderfreak, this might be the downslope winds beginning.

kgyx_20171030_0233_BV_0.4.thumb.png.94c2416842f7b00edbe9b2d960bca831.png
 

That high velocity in northern NH and western ME is not just due to the beam being elevated and into the LLJ. That is immediately downstream of the high terrain. 

So we're either sampling the downsloping (it is about 5,000 feet) or it is some kind of standing wave (which means conditions are favorable for downslope winds anyway).

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10 minutes ago, OceanStWx said:

Just heard the roof make some noise up here on the hill, sure enough RSOIS gusted to 39 knots. 

Not bad for this early.

Lahiff at BTV already gusted to 51mph on his home station on the west slopes east of the WFO.

Downslope zones will get the highest interior winds.  They looked to be mixing down the 3000ft level at times so far.

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4 minutes ago, powderfreak said:

 

Lahiff at BTV already gusted to 51mph on his home station on the west slopes east of the WFO.

Downslope zones will get the highest interior winds.  They looked to be mixing down the 3000ft level at times so far.

Amazingly light winds here.  I'm averaging 5-8mph on my Davis

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This is awesome meteorology.

Winds still fairly light in the immediate Lake Champlain region
of the valley while downslope wind gusts 40-50mph have occurred
along the western slopes of the Greens. See our latest Public
Information Statements (PNS) for the latest reports.
Mountain wave activity seen nicely on the radar base velocity
with wind speeds exceeding 50 kts. This is just a taste of
things to come. Highest resolution models have best handle on
the mountain wave phenomena as local BTV 2km, its time lag,
HiResARW, and HRRR has best handle on wind gusts which are
confined to a small area west of the mountains at the
moment. They are in general agreement that the highest winds
will occur when the low level jet maxes out between 06-12z with
the core of the jet of 90-105kt 3-5k feet. Froude numbers
running just over 1 indicative of downslope wind storms. The
Froude creeps a bit over 1 during the core of the jet so
expecting wind gusts to increase over a larger area causing an
increase in power outages by 09z.
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3 minutes ago, wxeyeNH said:

Amazingly light winds here.  I'm averaging 5-8mph on my Davis

Wind gusts so far in VT:

VERMONT

...Addison County...
   Middlebury Airport      41   535 PM 10/29  AWOS
   1 E Monkton Ridge       36   536 PM 10/29  CWOP

...Chittenden County...
   1 E Nashville           51   626 PM 10/29  NWS Employee
   1 W West Bolton         46   608 PM 10/29  CWOP
   1 ENE Underhill Cent    43   455 PM 10/29  CWOP
   2 N Hanksville          40   424 PM 10/29  CWOP
   1 E Jonesville          39   631 PM 10/29  MESOWEST

...Franklin County...
   East Berkshire          43   447 PM 10/29  MESOWEST

...Lamoille County...
   Mt. Mansfield           70   905 PM 10/29  Co-Op Observer
   2 NNE Smugglers Notc    36   819 PM 10/29  MESOWEST

...Rutland County...
   1 S Danby Four Corne    49   925 PM 10/29  MESOWEST
   1 ENE Wells             48   927 PM 10/29  MESOWEST

...Washington County...
   Montpelier Airport      37   428 PM 10/29  ASOS
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