Area Forecast Discussion
Issued by NWS Portland, ME

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
FXUS61 KGYX 181212 CCA

Area Forecast Discussion...CORRECTED
National Weather Service Gray ME
712 AM EST Thu Jan 18 2018

A weak ridge of high pressure will bring quiet and seasonable
weather to the area today. A warm front will lift north across the
area late tonight and early Friday with clouds and a few mountain
snow showers. A milder flow and above normal temperatures follow
this front late Friday into the upcoming weekend. A storm system
may affect the region early next week with mixed precipitation and



550 AM...Minor ESTF update to reflect the current mesonet in
near term grids.

Prev disc...
Weak ridging will take center stage today...with lingering clouds
and scattered flurries confined to the higher terrain in upslope
flow. Temperatures will be seasonable with highs ranging from the
mid 20s to lower 30s across the forecast area.


For tonight...a shortwave impulse will ride east from the Great
Lakes and across New England. We`ll see a band of warm air
advection clouds overnight with this feature and perhaps a few
snow showers across the higher terrain. Lows tonight will be
mainly in the teens. On Friday...the shortwave impulse slips
offshore in the morning while the surface warm front and clouds
lift to our north. Outside of a few mountain snow`ll
be a dry day with morning clouds giving way to sunshine across
southern and coastal sections. Highs will be a bit milder than
today with readings ranging from the upper 20s to mid 30s.


A fast moving and moisture starved system will pass well to our
north Friday night into Saturday. Passing short wave may bring a
couple scattered snow showers to far northern areas. Otherwise, it
will remain relatively dry. 850 mb temperatures above zero
Celsius and good mixing may allow for readings to reach the 40s on
Saturday, well above normal for this time of the year.

A cold front will cross the region Sunday, before stalling and
dissipating just south of our region. Nevertheless, temperatures
will once again reach the lower 40s over far southern areas with
30s elsewhere.

All models in agreement with high pressure building into New
England behind this front on Monday. As an intense area of low
pressure moves over the Great Lakes region, a secondary area of
low pressure may form along a slow moving cold front near the
Mid Atlantic region. This system may allow for a brief period of
strong gusty southerly winds along the coastline as well as
mixed precipitation to move quickly through the region. Ice jams
will need to be monitored closely with this mixed precipitation.


Short Term /through Friday/...VFR with lcl MVFR psb in mtn

Long Term...Possible MVFR conditions Friday night into Saturday
with scattered snow showers across northern areas, otherwise
VFR. Ceilings and visibilities will be lowering Monday night
into Tuesday as low pressure forms along the Mid Atlantic region
and moves north.


Short Term /through Friday/...Marginal SCA for seas remains in
effect for the ocean waters through this morning. Otherwise...expect
winds and seas to remain below SCA threshold the remainder of the

Long Term...Gusty southwesterly winds becoming westerly by
Saturday. Winds may touch gale force. A strong gale may develop
next Tuesday as low pressure develops to our west.


River flood warning for the Kennebec continues as the river
fluctuates near flood stage because of tidal influence near the
ice jam.


MARINE...Small Craft Advisory for hazardous seas until 5 PM EST this
     afternoon for ANZ150-152-154.



ES is the U.S. government's official web portal to all federal, state and local government web resources and services.