Callahan, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

031
FXUS66 KMFR 041708 AAA
AFDMFR

Area Forecast Discussion...UPDATED
National Weather Service Medford OR
900 AM PST Wed Dec 4 2024

Updated Aviation Discussion

.DISCUSSION...Low clouds and fog are present again with
visibility under a mile in the Medford area as of 3 AM.
Fog/freezing fog will continue in west side valleys and near
Klamath Falls until the late morning when improvements come. Slick
driving conditions will be possible again this morning.
Considering the conditions this afternoon, the Grants Pass area
and the Illinois Valley could have harder clearing out as well as
other valleys. The chance for better visibility will continue
through the afternoon before lowering again later in the afternoon
in similar areas as the past few days.

Temperatures as of 3 AM are in the 30s and 20s with 40s near the
Curry County coast. After, high temperatures east of the Cascades
will be in the 40s with 50s and low 60s west. With the trouble of
clearing out as well in the Grants Pass area and Illinois Valley,
highs are forecast to stay in the 30s today. More sunshine will be
found outside of the valleys with mild afternoon temperatures
continuing.

The stronger ridge present is now forecast to stay in the area for
longer into Friday, so the Air Stagnation Advisory will continue
until then. A disturbance will move through the PNW Thursday, but
this will be weakening as it moves inland. Rain chances for this
will be lighter with less than a tenth of an inch at the coast,
mainly in the waters. Forecast soundings support an inversion in
valleys Thursday night as well, so have added this to similar areas.
A better chance for precipitation will be into weekend as a trough
moves down the Canadian coast. There is more agreement that there
will be precipitation Saturday with more uncertainty on how much
lingers for Sunday. For now, the impacts will be light to moderate
precip near and west of the Cascades. Ridging will build back in
early next week  Temperatures will stay mild through the long term.
-Hermansen

&&

.AVIATION...04/18Z TAFS...Valley fog continue to linger over KRGB
and KMFR, with these LIFR conditions persisting through around 20Z
Wednesday. Conditions at these two locations are expected to briefly
improve to VFR (65% probability), but IFR/LIFR conditions are
expected to return around 00Z Thursday (75% probability). A weak
frontal system is expected to bring MVFR/IFR condition to KOTH
starting around 06Z Thursday.  Otherwise, VFR conditions under
generally clear skies through the TAF period. /42 (PQR)

&&

.MARINE...Updated 200 AM PST Wednesday, December 04, 2024...The main
update is that we have made a sizeable adjustment toward the higher
swell late Saturday night into Sunday night indicated by the 00Z run
of the Wavewatch model. Very high and very steep seas of 15 to 20
feet at 15 to 16 seconds are possible, with a peak indicated by the
model around sunrise on Sunday morning. In incorporating model bias,
and some consideration for previous model runs, we have gone with a
slightly slower and weaker solution of 13 to 18 feet peaking late
Sunday morning.

First, light to moderate north winds and relatively calm swell
dominated seas will persist this morning. Winds become southerly
this afternoon ahead of a weakening front on Thursday. West swell
dominated seas will increase slightly Thursday into Thursday night.
Another stronger front will move through Friday night into Saturday.
Advisory conditions are possible with the front, especially north of
Cape Arago. The front will be followed by the rapidly building, very
steep seas Saturday night into Sunday. Sunday night into early
Monday, diminishing seas are likely to remain high and steep.
-DW


&&

.MFR WATCHES/WARNINGS/ADVISORIES...
OR...Air Stagnation Advisory until 4 PM PST Friday for ORZ023-024-026-
     029>031.

CA...None.

PACIFIC COASTAL WATERS...None.

&&

$$