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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
- Windy conditions this afternoon in the Kittitas Valley
- Warm and dry weather persists all week
- Precipitation chances return This Weekend
DISCUSSION
Warm and dry conditions are anticipated extending through the end of the week. A cold front will make noticeably cooler temperatures both for afternoon highs Today and Wednesday, and also for the overnight lows, which are likely (60 to 90%) to dip back into the 30s both Wednesday and Thursday morning across the Valleys, and leaning towards maintaining more mild 40s in the Columbia River Gorge and Lower Columbia Basin.
The cold front will bring gutsy surface winds especially for the Kittitas Valley This afternoon, where a wind advisory is in effect. HREF provides about a 50% chance for wind gusts in excess of 40 mph across Ellensburg area, and higher (60-90%) across the I-90 corridor eastward through Renslow.
Temperatures will probably rebound heading into Friday as surface winds return to light as a confluent flow/split flow aloft becomes the prime synoptic influence. Lows trend back up into the 40 and highs in the 70s across the lowlands.
By Friday Night, slight precipitation chances (15-30%) return, primarily to the mountains, before increasing to likely (60-75 percent) across the mountain with scattered showers (33% coverage over the lowlands from Saturday into Sunday. Fairly light QPF totals over the latter half of the weekend as the NBM mean shows about up to 0.3 whole portions of the Northern Blue Mountains ad push one inch of QPF. By Sunday night snow levels fall to as low as 3500 Cascades, to 4200 ft AGL across the Blues, limiting impacts. Russell/71
AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/
A cold front will influence the region Today and Tonight, developing a west to northwest surface wind with variable gust potential across the terminals. The more gusty terminals will be DLS followed by ALW and PDT. Beside of the diurnal gust potential, VFR category is expected as only high cirrus is anticipated.
Preliminary Point Temps/PoPs
PDT 67 37 67 39 / 0 0 0 0 ALW 66 41 66 43 / 0 0 0 0 PSC 70 37 70 39 / 0 0 0 0 YKM 67 36 67 38 / 0 0 0 0 HRI 70 37 70 39 / 0 0 0 0 ELN 57 32 63 36 / 0 0 0 0 RDM 69 32 70 36 / 0 0 0 0 LGD 66 35 67 38 / 0 0 0 0 GCD 68 36 67 39 / 0 0 0 10 DLS 66 40 70 43 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
WA...Wind Advisory until 5 PM PDT this afternoon for WAZ026. OR...None.
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