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  Forecast Discussion for Southern Oregon and Northern California  

Forecast: Forecast Discussion | 7 Day Forecast

Forecast Discussion for MFR NWS Office

FXUS66 KMFR 221020

Area Forecast Discussion
National Weather Service Medford OR
320 AM PDT Thu Jun 22 2017

.DISCUSSION...The heat is on. Very hot temperatures will impact
areas from west to east over the next several days, starting with
a heat advisory for the Chetco area of the Curry County coast
today. Highs will likely reach 90 or above in Brookings again
today, following lows this morning in the mid to upper 70s. The
thermal trough will strengthen and begin to slide inland this
weekend. While this will mean relief for the southern coast, where
south winds will bring a surge of clouds and cooler temperatures
late Friday into Saturday, the inland areas will continue to warm
significantly. Triple digit highs will likely be common Saturday
and perhaps SUnday as well for the West Side, with all inland
areas seeing highs 20 to 25 degrees above normal for this time of
year. With overnight lows this weekend remaining relatively warm
as well, heat headlines may be necessary for the Rogue and
Illinois Valleys, as well as the valleys of Siskiyou County.

Relief for the rest of the forecast area will arrive late in the
weekend, as an upper level trough slowly pushes into the coast.
Shortwaves in the flow ahead of the trough may be enough to kick
off convection over much of the area Sunday afternoon through
Monday evening, but the timing and location of these storms is
still uncertain. Whether or not thunderstorms do develop,
temperatures will see a marked cooling trend early next week,
dropping to near normal values for the rest of the forecast term.


.AVIATION...22/06Z TAF CYCLE...Mostly VFR across the area tonight
into Thursday evening, except patchy coastal valley fog/stratus
north of Cape Blanco early Thursday morning, but these should go
away quickly by 16z. Strong northerly winds are expected again
Thursday at KOTH with wind gusts of 35-40 kt developing in the
afternoon/evening. -Spilde


.MARINE...Updated 3:00 AM Thursday, 22 June 2017...The thermal
trough along the coast will continue to strengthen and persist for
the next several days, causing steep, wind driven seas. The steepest
seas will occur south of Cape Blanco... but even the northern
portion of the waters will still hit gale and haz seas criteria.
Pressure offshore will begin dropping Friday night... causing the
pressure gradient along the coast to lessen thus causing winds to
diminish Saturday... transitioning to southerly flow and fog
Saturday night into Sunday. -Sven


OR...Heat Advisory from 11 AM this morning to 9 PM PDT this evening
     for ORZ022.


Pacific Coastal Waters...Small Craft Advisory until midnight PDT Friday night for
     Gale Warning until midnight PDT Friday night for PZZ356-376.
     Hazardous Seas Warning until midnight PDT Friday night for
     Gale Warning until 5 AM PDT early this morning for PZZ350-370.



NWS MFR Office Area Forecast Discussion