890
FXUS66 KMFR 241501
AFDMFR

Area Forecast Discussion
National Weather Service Medford OR
801 AM PDT Sun Aug 24 2025

.DISCUSSION...The radar is already showing isolated thunderstorms
in portions of eastern Klamath and Lake county. This will be a
sign of things to come later this morning, and especially this
afternoon. Thunderstorms will only increase in time with most
centered along and east of the Cascades and northern Cal, with the
bullseye around the Trinity Horn. The low and mid level water
vapor shows a higher moisture content compared to this time
yesterday,and yesterday there were 136 lightning strikes. Most of
which were concentrated in southeast, and eastern Lake County
with a strike in south Modoc county.

There`s some evidence supporting for a few storms to come off the
terrain over the Siskiyous and drift north into the southern end
of the Rogue Valley late this afternoon into early this evening.

Afternoon temperatures could be capped off some due to the
extensive cloud cover this morning and possibly into this
afternoon and they have been adjusted lower. A few minor
adjustments to the sky cover and thunderstorm coverage for today,
otherwise the forecast is pretty much on track for today.

The weather will remain active for the next few days before things
settle down towards the middle ofthe work week. -Petrucelli


&&

.AVIATION...24/12Z TAFs...Along the coast, IFR/LIFR conditions are
impacting most coastal sites overnight. This will peel back to just
offshore later this morning and early afternoon, with local IFR
persisting along the coast. IFR/LIFR will return to coastal areas
this evening. Inland, VFR conditions continue through early this
afternoon. Then, scattered to widespread thunderstorm activity is
expected this afternoon and evening, with the focus expected to be
south of the Rogue-Umpqua Divide, east of the Cascades and across
northern California. Local MVFR conditions and strong, gusty winds
are possible with thunderstorms.


&&

.MARINE...Updated 800 AM PDT Sunday, August 24, 2025...Relatively
calm conditions conditions are expected today within 30 nm of shore,
but steep seas will continue beyond. As the thermal trough briefly
strengthens, north winds and steep seas will spread to all area
waters Sunday night into Monday, then persist through at least
Tuesday. The thermal trough will weaken and winds and seas should
ease mid to late next week. -BPN


&&

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

     Red Flag Warning from 1 PM this afternoon to 9 PM PDT this
     evening for ORZ621-623>625.

     Red Flag Warning from 2 PM to 8 PM PDT Monday for ORZ617-
     620>625.

     Heat Advisory until 8 PM PDT this evening for ORZ023-025.

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

     Red Flag Warning from 1 PM this afternoon to 9 PM PDT this
     evening for CAZ280-281-284-285.

     Red Flag Warning from 2 PM to 8 PM PDT Monday for CAZ280>282-284-
     285.

PACIFIC COASTAL WATERS...Small Craft Advisory from 5 PM this
     afternoon to 11 PM PDT Tuesday for PZZ350-356.

     Small Craft Advisory until 11 PM PDT Tuesday for PZZ370-376.

&&

$$