Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 240951
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
251 AM PDT Mon Jul 24 2017

.SHORT TERM...Today through Wednesday night. Scattered showers and
thunderstorms developed over southern Oregon yesterday evening.
The cloud shield associated with this precipitation has been
moving across the eastern portion of the forecast area overnight
and will be exiting later this morning. Aside from this cloudiness
it will be mostly sunny today and a little cooler. Highs will be
about 3-6 degrees cooler than Sunday with northerly winds. The
upper low responsible for yesterdays precipitation will remain
nearly stationary along the northern California coast today. Any
showers or thunderstorms that develop will be along the southern
edge of the forecast area from the Cascades across Bend/Redmond to
the John Day highlands later this afternoon and evening. Little
change to the pattern Tuesday as the low moves slowly into
northern California. Another day with a chance of showers and
storms over southern and central Oregon and mostly sunny further
north. Highs will be in the 90s. The upper low weakens and finally
moves northeast across the region Wednesday. This will bring more
cloudiness through the area and spread the precipitation a bit
further north as well. 94

.LONG TERM...Thursday through Sunday...Above normal high
temperatures will yield hot and dry conditions from Thursday
through Sunday. Southwest flow aloft persists with a weak
disturbance bringing mid level moisture and elevated instability to
the Blue Mountains for a slight chance of thunderstorms Friday
afternoon into the evening. Otherwise, will keep looking for any
potential of monsoon moisture to creep northward into central and
NE Oregon over the weekend. Polan

.FIRE WEATHER...Moisture will increase Monday/Monday night, and
with sufficient instability, think scattered thunderstorms will
prevail across the Central Oregon plateau and highlands. Thus, a
Red Flag Warning for abundant lightning is in effect for zones
611, most of 642, and the southern portion of 640 Monday afternoon
and evening. Expect additional thunderstorms Tuesday, but it
looks like the coverage will remain isolated. For Wednesday, the
upper low will open up as an upper trough moves across the eastern
OR mountains for a slight chance of thunderstorms. Ridging is
expected to rebuild over the area for late week into next weekend
for dry and hot conditions typical of mid summer.

&&

.AVIATION...12Z TAFs...Except for a possible thunderstorm or two
this evening, and again Monday in Central Oregon affecting TAF sites
KRDM and KBDN, VFR conditions are expected to persist during the
next 24 hours with just some mid and high clouds. Increased winds
this afternoon and evening are expected to become light overnight
and remain light on Monday.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  92  59  95  62 /  10   0   0   0
ALW  94  63  96  65 /  10   0   0   0
PSC  96  58  98  62 /   0   0   0   0
YKM  94  60  96  62 /   0   0   0   0
HRI  95  59  98  62 /   0   0   0   0
ELN  91  57  93  60 /   0   0   0   0
RDM  90  54  92  56 /  20  20  10  10
LGD  90  53  91  54 /  10  10  10  10
GCD  93  57  92  57 /  30  30  10  10
DLS  95  62  96  64 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...Red Flag Warning from 2 PM this afternoon to 11 PM PDT this
     evening for ORZ611-640-642.

WA...None.
&&

$$

94/99/99



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