Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 302106
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
206 PM PDT MON MAY 30 2016

.SHORT TERM...Tonight through Thursday...Ridge of high pressure will
build over the region Tuesday and Wednesday with warmer temperatures
each day. By Wednesday high temperatures will be in the 80s to lower
90s. By late Wednesday the ridge will begin to flatten as a weather
system moves into western Canada. This will allow for some
increasing westerly winds late Wednesday and continuing into
Thursday and slightly cooler temperatures on Thursday. There will be
some weak instability over far northeast Oregon Wednesday afternoon
and evening for a slight chance of convective showers and or a
thunderstorm.

.LONG TERM...Thursday night through Monday...A flat but very warm
westerly flow will be in place Thursday evening, but will start to
shift to a more southerly flow on Friday, as a four corners high
pressure system will set up for the extended.  This will provide hot
and dry conditions for the weekend.  High temperatures will be
staring off Friday afternoon in the upper 80s to lower 90s across
the lower elevations.  Models are on their second day of consistency
indicating that Saturday, Sunday, and Monday high temperatures will
be in the upper 90s to lower 100`s across the lower elevations.
Sunday expected to be the hottest of the days.

While this high pressure sets up over the west, there will be a
disturbance to the south off the California coast.  This will
provide impacts to the area as early as Saturday.  Although, it
looks more favorable that impacts will be Sunday into early next
week.  Mid level moisture transport on Saturday will lead to
unstable conditions, mainly over central and portions of northeast
Oregon. But it looks like there will be enough of a cap to keep
thunderstorms form developing.  The story changes a little be on
Sunday as some areas across central Oregon may not be capped, and
there could be some forcing from the disturbance to aid in the
thunderstorm development. These storms will likely be high based and
possibly low precipitation.  The forcing looks to move across the
forecast area through the night on Sunday, therefore nocturnal
thunderstorms have been introduced.  As we move into Monday, expect
another hot day, but with more moisture available, the chances of
getting storms to develop diurnally become more favorable. Weber


&&

.AVIATION...00Z TAFS...VFR conditions will prevail over the next 24
hours with mostly clear skies and winds less than 10KTS. Weber


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  47  82  51  89 /   0   0   0   0
ALW  51  83  55  89 /   0   0   0   0
PSC  48  85  52  93 /   0   0   0   0
YKM  45  84  52  90 /   0   0   0   0
HRI  46  84  50  92 /   0   0   0   0
ELN  43  82  51  87 /   0   0   0   0
RDM  39  83  47  87 /   0   0   0   0
LGD  44  77  48  85 /   0   0   0  20
GCD  41  81  49  87 /   0   0   0  10
DLS  53  89  57  92 /   0   0   0   0

&&

.PDT Watches/Warnings/Advisories...
OR...None.
WA...None.
&&

$$

91/89/89


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