textproduct: Pendleton
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
- Warming temperatures through midweek.
- Dry conditions for much of the week, with the potential for mainly mountain showers and thunderstorms around midweek.
DISCUSSION
A more zonal flow is expected to develop over the region as an upper low over the northern Rockies moves northeast. By Sunday, a weak upper low will move over the area, but is expected to be dry. This low will then help carve out a broader trough that will shift eastward with the upper low moving to northern Montana/southern Canada by Monday night. Can't rule out a passing shower with the low, especially over the mountains, but overall chances are low (<20 percent).
As this low spins to the northeast, weak ridging will build in for Tuesday. A weak trough and some shortwave energy will then move across the region Wednesday into Thursday. With this feature will come the best chances for precipitation and thunderstorms in the next 7 days. Thunderstorm chances, although low (<20 percent) look to be highest over the mountains of central and eastern Oregon).
Dry and a bit cooler weather returns for Thursday and Friday. By Saturday, precipitation may start to return, especially to the Cascades as an upper low off the coast approaches the region. There is still some uncertainty with the timing of this system, and we are a week away but it will bear watching. Additionally, depending on the track and timing, winds may begin to increase as early as Friday, or into Saturday across portions of the area.
AVIATION /00Z TAFS THROUGH 00Z MONDAY/
VFR conditions will persist through the forecast period for all sites. Winds will remain elevated between 10-15 kts gusts to 20-27 kts at DLS/PDT/RDM/BDN/YKM through 7-8Z and then settling to below 12 kts. Winds for the remaining sites will remain 12 kts and below while area wide CIGs of mostly 25kft to SKC.
Preliminary Point Temps/PoPs
PDT 42 71 44 76 / 0 0 0 0 ALW 47 72 49 77 / 0 0 0 0 PSC 43 77 47 81 / 0 0 0 0 YKM 42 77 47 80 / 0 0 0 0 HRI 43 74 46 80 / 0 0 0 0 ELN 39 71 44 75 / 0 0 0 0 RDM 29 66 34 73 / 0 0 0 0 LGD 37 68 39 73 / 0 0 0 0 GCD 34 69 37 75 / 0 0 0 0 DLS 45 76 49 82 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...None. OR...None.
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