Area Forecast Discussion
Issued by NWS Spokane, WA
Issued by NWS Spokane, WA
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129 FXUS66 KOTX 252357 AFDOTX Area Forecast Discussion National Weather Service Spokane WA 457 PM PDT Wed Sep 25 2024 .SYNOPSIS... Strong winds accompany a cold front passage through the late evening. Areas of blowing dust along with showers and thunderstorms will be possible with the frontal passage. Temperatures return to near normal by Thursday with another cold front passage Friday. Above average temperatures return Saturday into early next week, with Saturday the warmest day of the weekend. Some freezing overnight lows are possible again heading into next week. && .DISCUSSION... Tonight through Thursday: The evening will start active with the cold front pushing through the region. Winds will continue to be main concern. Isolated thunderstorms embedded along the front will be sporadic lightning and gusty outflow winds. Wind speeds will 20-30 MPH sustained with gusts near 40 MPH. By 11 PM, the cold front will mainly be impacting extreme Eastern Washington and the Idaho Panhandle. By early Thursday morning, the thunderstorms are expected to be no longer occurring. Winds will begin to decline as a zonal flow pattern begins to take hold and the gradient loosens through the day. Afternoon winds are expected to be breezy through the Okanogan Valley with sustained 10-20 MPH and gusts near 35 possible. On the plus side, temperatures are expected to decrease by 10-15 degrees from Wednesday highs. The highs across the region are expected to be in the 60s to low 70s. Overnight lows will be in the upper 40s and 50s. /JDC Friday through Wednesday: Expect zonal flow late in the week, with generally dry conditions returning and daytime temps near to slightly above daily normals. Synoptic outlook turns murkier early next week with occasional shortwaves likely to push through the progressive weather pattern. Have introduced slight chances for showers Tuesday/Wednesday, but these are mostly confined to the mountains for now...something to watch. Frost/freezing conditions possible next Monday and Tuesday as well in our northern sheltered valleys. In all, not much reason to stray from near normal daytime temps through the end of the extended forecast. /KD && .AVIATION... 00Z TAFS: Most of the region is behind the front. Areas to the West of Spokane and Pullman should have VFR condtions through the TAF period. GEG-SFF-COE_PUW-LWS should have MVFR with improving to VFR by 04Z. Winds will continue to be breezy with 10-20 sustained and gusts near 30MPH. FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Moderate confidence in MVFR to VFR conditions. VFR conditions could happen quicker than expected. && .PRELIMINARY POINT TEMPS/POPS... Spokane 46 68 50 75 46 79 / 40 0 0 0 0 0 Coeur d`Alene 46 67 47 74 47 77 / 50 0 0 0 0 0 Pullman 44 65 45 72 46 77 / 50 0 0 0 0 0 Lewiston 54 73 53 80 54 83 / 70 0 0 0 0 0 Colville 36 68 39 74 36 75 / 60 0 10 0 0 0 Sandpoint 44 64 44 72 43 72 / 60 0 10 0 0 0 Kellogg 48 64 51 70 51 78 / 90 0 0 0 0 0 Moses Lake 43 70 47 77 44 77 / 30 0 0 0 0 0 Wenatchee 48 70 54 74 50 74 / 20 0 10 0 0 0 Omak 43 70 49 77 47 77 / 20 10 10 0 0 0 && .OTX WATCHES/WARNINGS/ADVISORIES... ID...Wind Advisory until 11 PM PDT this evening for Central Panhandle Mountains-Coeur d`Alene Area-Idaho Palouse-Lewiston Area- Northern Panhandle. WA...Wind Advisory until 11 PM PDT this evening for Lower Garfield and Asotin Counties-Northeast Blue Mountains-Northeast Mountains-Okanogan Highlands-Okanogan Valley-Wenatchee Area. Blowing Dust Advisory until 11 PM PDT this evening for Moses Lake Area-Spokane Area-Upper Columbia Basin-Washington Palouse-Waterville Plateau. && $$