Area Forecast Discussion
Issued by NWS Spokane, WA

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000 FXUS66 KOTX 190948 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 248 AM PDT Mon Apr 19 2021 .SYNOPSIS... Much cooler temperatures will settle in across the Inland Northwest to start the week. Dry and warming temperatures return through at least Wednesday. Then additional precipitation chances arrive Thursday into next weekend. && .DISCUSSION... Monday and Tuesday: Satellite imagery shows our cold front racing to the southwest very nicely as the leading edge of gusty winds has made it into northern Oregon early this morning and speeds have begun to taper off. Some of the peak winds observed were 45 - 55 mph with a select location or two reaching into the 60 mph range in far south-central Washington. Today will feature cooler temperatures than we saw the past few days, thanks to the sharp cold advection with the cold front. Temperatures will top out just below seasonal normal (upper 50s) and about 15-20F cooler than we saw on Saturday and Sunday. A drying trend in place under dry, cool, northwest flow will keep temperatures cool to start the week before a gradual warming trend takes place through midweek. In between our departing trough and a longwave trough in the Gulf of Alaska, we will keep northerly flow in place for several days and mostly clear skies as well. A brief break in the weather will keep us in more of a Spring-like weather pattern and not so much Summer-like (temperature-wise). /Dewey Wednesday through Sunday: Initially longwave axis remains off the coast allowing a northerly flow void of significant shortwaves to influence sensible weather over Eastern Washington and North Idaho. The ridge influence is weakened after Wednesday and may allow a weather disturbance to drop down from the north Thursday/Friday with enough intensity to merit a chance of thunderstorms. This disturbance might also result in gusty north/northeast winds. A followup disturbance is expected to approach with a warmer trajectory from the west Saturday/Sunday. Therefore the forecast is marked not only with a cooling trend after temps peak on Wednesday but also an increase in cloud cover and pops peaking over the weekend with a persistent rain shadow of varying size over the Columbia Basin and nearby lowlands. /Pelatti && .AVIATION... 12Z TAFS: The strong northeast winds have begun to taper off early this morning and will continue the trend through mid-day Monday. Northeast winds 10 to 15 mph with gusts 25 to 30 mph will be possible through 14z - 17z. Clearing skies will be present along with light northeast breezes through Monday night under VFR conditions. /Dewey && .PRELIMINARY POINT TEMPS/POPS... Spokane 58 34 63 35 69 43 / 0 0 0 0 0 0 Coeur d`Alene 56 31 62 33 66 41 / 0 0 0 0 0 0 Pullman 56 33 62 33 65 40 / 0 0 0 0 0 0 Lewiston 64 37 67 38 71 44 / 0 0 0 0 0 0 Colville 61 31 67 34 72 40 / 0 0 0 0 0 0 Sandpoint 55 32 60 32 65 40 / 0 0 0 0 0 10 Kellogg 51 33 57 34 63 42 / 0 0 0 0 0 0 Moses Lake 65 33 70 36 75 45 / 0 0 0 0 0 0 Wenatchee 63 40 68 43 74 48 / 0 0 0 0 0 0 Omak 66 38 70 39 76 45 / 0 0 0 0 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... ID...None. WA...None. && $$

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