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Interior NW & NE Burbs 2019


gravitylover
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Just now, West Mtn NY said:

The other thing we have going for us is the lowest dews are to our North and NW not NE. It is in a position to keep pushing rather than be eroded by retreating to the NE as is often the case with highs up over Maine. It wouldn't take much of a last min tick SE to make this a 6-8 dump of snow followed by a few inches of Sleet to bulletproof the pack

I hope so.  I will be happy with only snow and sleet. 

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9 minutes ago, Brasiluvsnow said:

Everything is white here main roads my driveway everything 

Uh oh. Im at a friends house up on the hill separating nyack and valley cottage....havent peaked outside in a while. This might be a interesting drive home. 

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22/20 here 1" OTG. Looking at Uptons AFD, they mentioned that the nam has 3-4" of QPF just to the east of NYC. that could be a real mess up here if our surface temperature stays below freezing.

NEAR TERM /THROUGH SUNDAY/...
Rain/Snow line right along the south shore of NYC and Long Island
and will steadily progress northward this evening. 00Z NAM
continues to support rapid changeover from south to north
tonight.

There will likely be adjustments to advisories/warnings through
the night as the warmer air works across the region and a
strong southerly low-level jet works northward from the Mid
Atlantic states. East flow already pushing dew points to around
30 across coastal locations, a clear sign of a warming boundary
layer. HiRes models keep most coastal locations above freezing
with the exception of the Connecticut coast which may briefly
drop to around freezing with the onset of steadier precipitation.

Consensus track is right over or just east of the NYC metro by
Sunday, which will likely draw the coastal front northward up
into CT. The question is how far north does the low-level warm
air get across the Lower Hudson Valley, NE NJ, and interior SW
CT. There is no question of a snow to rain transition across the
entire area with pronounced warming aloft, but rather does a
enough low-level cold air stay in place for a prolonged period
of freezing rain across the interior.

Once a changeover occurs to rain, it will be heavy, thus the
flash flood watch for coastal and urban areas. This in
collaboration with surrounding offices. Some elevated
instability could result in heavier rain in the morning due to
convection. 18Z NAM has shifted heavy rain axis as far west
as NYC with 3 to 4 inches of rain. This is due to a feed of
subtropical moisture and steepening mid-level lapse rates,
especially along the coast. May need to expand flash flood
watch across interior portions of CT.

Temps tonight rise from SE to NW overnight, and are based on
higher resolution guidance. Temps likely remain below 32 across
far interior NW zones.

Then as expected, temps plummet Sunday afternoon as frigid air
rushes in behind this storm. The bulk of the precipitation
winds down, but any lingering precip could change back to a mix.
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