Area Forecast Discussion
Issued by NWS Medford, OR

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000
FXUS66 KMFR 270959
AFDMFR

Area Forecast Discussion
National Weather Service Medford OR
259 AM PDT Mon Mar 27 2017

.DISCUSSION...Showers will intensify this morning again as an
upper level trough moves across the region with a unseasonably
cold air mass aloft. this will bring another round of higher
elevation snow that will cause possible slippery driving
conditions with road surface temperatures cooling overnight with
both the dark and snow showers. These showers will taper off this
afternoon as an upper level ridge builds into the region,
remaining in place through most of Tuesday. The next in the long
series of systems we have been experiencing this winter into the
spring moves in Wednesday morning as the ridge flattens. However,
the jet is now showing to be even farther north, near Vancouver
island, and the main bulk of the moisture doesn`t move into the
area until the right entrance region of the jet migrates south
Wednesday afternoon into the evening. Snow levels will be high
with the increased southerly flow, although gradients are not
looking to increase enough to have any wind advisories. This
system shifts east as the deep upper level trough shifts east
Thursday. Thursday night an upper ridge builds into the region
again, bringing a break in the action into the weekend. Sven


&&

.AVIATION...27/06Z TAF CYCLE...A cold front is moving east of the
Cascades tonight with another disturbance following through Monday
morning. This will continue widespread rain and snow showers with
mountain obscuration and freezing levels falling from around 5000
feet this evening down to 4000 feet MSL on Monday morning.
There will be local IFR (mainly near the coast) and local VFR
(mainly on the east side) ceilings but MVFR and mountain obscuration
for a majority of the area through Monday morning. Conditions will
begin to improve Monday afternoon with diminishing showers and
mostly VFR conditions expected. SK/FB

&&

.MARINE...Updated 200 AM PDT Monday 27 March 2017...West winds will
continue today as weak low pressure remains north of the waters, but
they will remain below advisory criteria. However higher west swell
will move into the waters late this morning through this afternoon
bringing higher seas. The higher seas should remain beyond 10 nm
from shore this morning, but as the higher swell comes in, the inner
waters will then get impacted by small craft conditions. Meanwhile
the outer waters could reach hazardous seas warning criteria with
seas expected to be very steep around 15 feet. Steep seas could
linger through at least Thursday morning. -Petrucelli


&&

.MFR WATCHES/WARNINGS/ADVISORIES...
OR...Winter Weather Advisory until 11 AM PDT this morning for
     ORZ027-028.

CA...None.

Pacific Coastal Waters...Small Craft Advisory for hazardous seas from 11 AM this morning
     to 11 AM PDT Thursday for PZZ350-356.
     Hazardous Seas Warning from 11 AM this morning to 11 PM PDT this
     evening for PZZ370-376.
     Small Craft Advisory for hazardous seas until 11 AM PDT Thursday
     for PZZ370-376.

$$

SBN/SBN/SBN


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