textproduct: Pendleton

KEY MESSAGES

- Warming and drier trend continues through the beginning of the week, with highs trending up towards the low to mid 80s.

- Cooler, wetter pattern possible through the later part of the week with some uncertainty with specifics.

- Light to slightly elevated diurnal winds through the week.

DISCUSSION

Dry and mostly clear to partly cloudy conditions through the area are continued to be advertised through satellite and radar. The upper level low has pushed off to the east over the Idaho/Montana region, allowing the upper level ridge to influence the pattern for the next several days. This will bring a warming trend in high temperatures through Monday/Tuesday (80-90% chance) until highs reach the low to mid 80s through most of the lower elevation areas. Winds will be generally diurnally driven with a few areas (especially along the Cascade gaps and the Columbia Basin) reaching wind gusts of 15 to 25 mph at times (10-30% chance).

The upper level pattern becomes more zonal on Tuesday as the ridge pushes off to the east and a trough/shortwave off British Columbia overtakes the pattern. Clusters struggle and diverge greatly how it wants to handle the upper level trough as we inch close to the weekend. Handling on strength of the shortwave, timing, or if it ever comes onshore is all over the place with no one clear solution. For example, by Friday afternoon, 19% of members brings a stronger trough that will enable a widespread precipitation pattern over the region. Of the 64% of members, guidance wants to delay the onshore of the trough and seclude the wetter pattern over the mountain areas. The remaining 17% completely tears the shortwave with no precip. While it does appear the vast majority (81% of members) of clusters keeps the pattern dry on Friday, confidence how the weather pattern will play out still remains fairly uncertain going into next weekend. Still plenty of time to monitor this evolving forecast, but not currently foretelling any major impacts (30-50% chance) although that can change depending on new guidance.

AVIATION /12Z TAFS THROUGH 12Z SUNDAY/

VFR conditions prevail through the period with light and variable winds through the period. May see some FEW to SCT clouds push through at some sites, but no CIG or VIS issues anticipated to come out of this period.

Preliminary Point Temps/PoPs

PDT 78 48 82 52 / 0 0 0 0 ALW 79 53 82 57 / 0 0 0 0 PSC 82 51 84 52 / 0 0 0 0 YKM 82 53 83 53 / 0 0 0 0 HRI 81 50 84 52 / 0 0 0 0 ELN 78 50 79 51 / 0 0 0 0 RDM 79 42 83 44 / 0 0 0 0 LGD 79 47 82 50 / 0 0 0 0 GCD 80 48 84 49 / 0 0 0 0 DLS 85 56 87 58 / 0 0 0 0

PDT WATCHES/WARNINGS/ADVISORIES

WA...None. OR...None.