textproduct: Pendleton

DISCUSSION

Regional satellite and radar showed cirrus overspreading the Oregon Cascades into central Oregon. A stable layer impinging on the Upper Cascade crest of Washington was still allowing high elevations snow in Kittitas county, where the HREF continued to hint at light snow accumulations. Road cams and mesonet observations indicated reduced visibility to under 1 miles in the upper slopes in Kittitas County, but no discernible impacts as the roads were all wet though the pass level. Some of that downsloping adiabatic warming will be lost by Saturday as winds slack off over much of the entire region. Sunny and spring like 50s will make a pleasant weekend, while mountain slopes and higher elevations are relegated to the 40s.

Surface wind gusts both This Afternoon and Friday will remain breezy/gusty with the 75th percentile of the NBM wind gust in the falling in the 30+ mph range. The west to southwesterly flow east of the Cascades will lead to a warming temperatures in the afternoon Friday as highs approach 60 degrees across the Lower Columbia Basin. The next appreciable chances for precipitation return across the central Oregon Cascade slopes This Weekend with profiles supporting rain or rain/snow in those zones, before drying out region wide for Monday and Tuesday. High probabilities for rain or snow, (70-90%) return by early Wednesday, depending on elevation levels across the higher terrain.

AVIATION /00Z TAFS THROUGH 00Z SATURDAY/

VFR conditions will continue prevailing for all sites. Latest guidance still depicts southwest sustained winds for KPDT/KPSC and northwest winds for KDLS around 12-15kts this afternoon into early evening. KDLS/KPSC are currently gusting at 20-25kts and may continue through 03Z, with a 30-40% probability on the timing/extent. Winds for those sites should decrease during the evening hours. However, KPDT/KALW might have sustained winds of 12-15kts around 17-18Z Friday morning, but confidence is low (15-30%). Feaster/97

Preliminary Point Temps/PoPs

PDT 31 57 32 51 / 0 0 0 0 ALW 35 55 35 51 / 0 0 0 0 PSC 32 58 31 53 / 0 0 0 0 YKM 29 55 30 52 / 0 0 0 0 HRI 32 58 31 52 / 0 0 0 0 ELN 30 47 30 48 / 0 0 0 0 RDM 24 57 27 56 / 0 0 0 10 LGD 29 56 31 56 / 0 0 0 0 GCD 27 54 31 57 / 0 0 0 10 DLS 33 55 34 53 / 0 0 0 0

PDT WATCHES/WARNINGS/ADVISORIES

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