Winter Thread 2017-18 (Northern Hemisphere) (snowing, warm, ice, recorded)

[Cambium]

Originally Posted by speagles84

Winter weather advisory posted for the entire Pittsburgh metropolitan area. 3-5" expected for me, and 4-7" in the mountains north and east. It's starting to snow now

Yup...Front end arrived in PA. Center of Clipper north of Chicago right now.


11am-3pm loop as the sun goes down

[Cambium]

[Cambium]

High ratio event tonight.

Maybe 3-4" for NYC and Long island? Less Northward. All on such little moisture.

Maybe a Shadow effect?

Area Forecast Discussion
National Weather Service New York NY
340 PM EST Wed Dec 13 2017

.SYNOPSIS...
Strong low pressure continues moving into the Canadian
Maritimes tonight as a Clipper low approaches from the west.
This low quickly moves south of Long Island Thursday morning and
offshore Thursday afternoon.

Winds will be subsiding this evening has the pressure gradient
weakens between low pressure systems. Mostly clear skies will
start the night, but will quickly become mostly cloudy to
overcast as the clipper low fast approaches from the west.
Already beginning to see light echoes in western PA as warm
advection commences there. This warm advection is progged to
to start in the middle levels after 03z west of the Hudson River
and 05-06z east of the Hudson River. Light snow will overspread
the region from west to east with this warm advection. Main vort
max associated with the clipper will swing around the base of
the mean upper trough and enhance lift, especially 09z-12z. The
surface low translates south of the area during this time,
which could help to enhance snowfall on Long Island. These
features quickly translate east as the upper trough, vort max,
and surface low move offshore 13-15z. Lift all also be
maximized in the dendritic growth zone between 750 and 900 mb
from around 09z to 13z across eastern Long Island.

Models have continued to come into better agreement with the
above scenario with the biggest uncertainty lies within the
mesoscale details, mainly across Long Island. Latest thinking is
for around a tenth of an inch of liquid across the interior,
increasing to around two tenths across Long Island. There may be
a shadow effect over NYC and NE NJ as the surface low moves
downslope of the higher terrain to the west.

For snowfall accumulation, 2 to 3 inches are forecast in the
advisory area across Long Island with 1 to 2 inches elsewhere.
There could be locally higher amounts with any enhancement or
banding on Long Island, so it would not be surprising if a few
spots reach closer to 4 inches. SREF plumes, NAM, NAM-3km, and
HRRR all support this forecast thinking. The snow should be a
higher ratio, powdery snow, potentially around 15:1 near the
coast and 17-18:1 across the interior.

The snow ends on the east end around 15z with skies quickly
clearing from west to east. It will become breezy as high
pressure builds in from the west Thursday afternoon. Highs well
below normal in the upper 20s and lower 30s are forecast

[FirebirdCamaro1220]

24.4°C with a dewpoint of -12.8°C at 3pm Mountain Time

[NortheasternBound]

Currently here in Aurora, ME...22F Degrees, Wind Chill 17F Degrees, Winds WNW12mph..Cloudy and snowing a bit!
Drove home in snow during yesterday's communte...4" accumulation...Awoke this morning to a THAW (Well, 34F Degrees)!
As we drove to work this morning we experienced black ice and slush under our wheels...From above we experienced Freezing rain and snow throughout Route 9 and Route 178! When we went through Amherst the temperature dropped to 32F Degrees.
It was such a lovely drive home...(though there was black ice), beheld the lovely candles/lights in the windows of those who chose to shine! Such a delightful display of Christmas Lights and Lawn Ornaments cheered us on to Birch Meadows!

[FirebirdCamaro1220]

Today's high temp was 25°C, 5.6°C above average; and this mornings low was 7.8°C, which is normal.

Currently 23.3°C with a dewpoint of -12.2°C at 5pm Mountain Time

[Shalop]

Originally Posted by Shalop

Today will possibly be our first ice day. Let's see if the max stays below 32F. I hope it will

Max was 31F. Bit earlier than average for our first ice day

[rpvan]

Originally Posted by Warszawa

Hopefully you guys will see some snowflakes too soon wasn't last winter really cold? I know Portland had one of the coldest ones on record


Fresh snow makes it feel really cozy. The first time it happens in a year is when it feels really special

Last winter was the coldest since 1992-93, but nowhere near the coldest on record.

[Isleofpalms85]

No Dammit, the weather models better shape up, and start producing more precipitation than they are right now, the latest GFS model shows practically no precipitation whatsoever for Indianapolis and for much of the Midwest, glad I am on my way to Dallas, coz I cannot process the possibility of a winter that is Super-Ultra Cold and bone dry

[Cambium]

Todays Min-Max temps.


NYC: 20/31
Philly: 21/31
Bridgeport: 21/33
Hartford: 18/27
Boston: 22/36
Buffalo: 10/20