880
FXUS66 KMFR 142148
AFDMFR

Area Forecast Discussion
National Weather Service Medford OR
248 PM PDT Mon Jul 14 2025

.DISCUSSION...It will be another warm afternoon with locations
reaching 95-101 degrees. Taking the warmer morning and the
expected highs into consideration, more locations are under an
elevated risk today. This will impact anyone that does not have
effective cooling and/or adequate hydration. An Extreme Heat
Warning and Heat Advisory is in effect through Tuesday evening for
this heat risk. Details can be found in NPWMFR.

There will be another 10-20% chance of thunderstorms this
afternoon as another shortwave passes through. This will be
concentrated in Siskiyou, Modoc and Lake counties. Tuesday`s
temperatures will be similar to today, but conditions are forecast
to stay dry.

In terms of overnight temperatures, forecast lows will be in the
50s and low 60s for more locations. The northerly flow we`ll have
the next few days will bring low concentrations of near surface
smoke to southern Oregon. Higher concentrations of smoke from the
Butler Fire is forecast in Siskiyou County and for Modoc County
from the Green Fire Tuesday afternoon because of a more westerly
flow there. Smoke higher in the atmosphere will create hazy skies
for more parts of southern Oregon the next few afternoons.

Areas east of the Cascades will likely not be under the risk for the
heat after the current time frame through Tuesday evening, so the
Heat Advisory for east side will be finished then. The main
change in the forecast has been to add a Heat Advisory for west
side valleys on Wednesday due to a 80-95% chance for the Rogue and
Illinois valleys and portions of the Klamath River Valley to see
100 degrees. Either way, precautions need to be made to protect
yourself from the heat. Drink plenty of water, avoid peak heating
between 10 AM and 4 PM, and stay in an air- conditioned room as
much as possible.


Long Term...Thursday through Sunday...Ridging continues through the
rest of the work week with temperatures 5-10 degrees above normal
for this time of year. After, a low starts to develop into western
Canada Thursday into Friday. This will help "cool" temperatures
back to below the 98-101 degree mark for more west side locations.
Looking to still favor drier conditions next weekend and the week
after will have cooler temperatures back to near normal.


&&

.AVIATION...14/18Z TAFs...The marine layer is starting to
burn off this morning. Inland TAF sites will likely see plenty of
sunshine today with VFR conditions dominating much of the region,
but a small chance of thunderstorms today could impact northern
California and south central Oregon. Blow off clouds from these
thunderstorms could impact KLMT, but it should be noted there is a
10% chance Klamath terminal could see an isolated thunderstorm.

&&

.MARINE...Updated 200 PM PDT Monday, July 14, 2025...Our thermal
trough pattern will continue through Wednesday. This will maintain
strong north winds and steep to very steep wind-driven seas across
all waters. Gales are expected in the afternoons/evenings mainly
south of Port Orford and beyond 5 nm from shore. Conditions will
begin to improve around mid-week as we transition away from wind-
driven seas. However, steep seas will be found in all areas Tuesday
evening through Thursday morning. -Hermansen

&&

.FIRE WEATHER...Thunderstorms remain the main fire weather
headline this afternoon and early evening. Read the discussion
above for more details on that. Otherwise, a well defined thermal
trough shown by inverted MSLP and 850mb heights on top of
1000-500mb thickness values spread north into western Oregon.
During this time, light east breezes around 10 to perhaps 15 mph
will cover the Cascades. We continued to keep recoveries moderate
on the western mid slopes of the Cascades and about 10% below
guidance. Overall, fire weather risk is limited through the
forecast period as wind and rh combinations remain below red flag
criteria.

We were interested in wind and rh fire weather conditions Thursday
earlier, although newer data seems to squashed those concerns east
of the Cascades. The one thing to note is ECMWF ENS along with the
GFS is predicting some thunderstorms east of the Cascades Thursday
evening. Again, these storms appears to be on the drier side with a
0.7 PWAT based on the 12Z GFS forecast sounding.

Otherwise, hot and dry weather will persist through this week, but
temperatures do trend a bit lower by the weekend with temperatures
near normal by Sunday.

&&

.MFR WATCHES/WARNINGS/ADVISORIES...
OR...Extreme Heat Warning until 8 PM PDT Tuesday for ORZ024-026.

     Heat Advisory from 8 PM Tuesday to 8 PM PDT Wednesday for
     ORZ023>026-029>031.

CA...Extreme Heat Warning until 8 PM PDT Tuesday for CAZ080-081.

     Heat Advisory from 8 PM Tuesday to 8 PM PDT Wednesday for
     CAZ080>085.

PACIFIC COASTAL WATERS...Gale Warning until 11 PM PDT Tuesday for
     PZZ356-376.

     Small Craft Advisory from 11 PM Tuesday to 5 AM PDT Thursday for
     PZZ350-356-370-376.

&&

$$