National Weather Service Text Product
AFOS product AFDPDT
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: AFDPDT
Product Timestamp: 2019-12-11 10:48 UTC
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913 FXUS66 KPDT 111048 AFDPDT Area Forecast Discussion National Weather Service Pendleton OR 248 AM PST Wed Dec 11 2019 .SHORT TERM...Today through Friday. Short wave will be exiting the region this morning. Rain and snow will be tapering off. Inversion and light winds remain over the Columbia basin and valleys with fog continuing through the morning. Satellite indicating a short break before the next system moves into the Pacific northwest by afternoon. This system is a large upper low with a strong westerly jet which will impact the region through Friday. The initial front will move through later this afternoon and evening with a period of rain and higher elevation snow. For tonight through Friday a strong mid level westerly flow will bring heavy precipitation to the Cascades. Models indicate several short waves in the flow moving across the region over the next few days. This will result in periods of rain and mountain snow for the remainder of the forecast area as well. The northeast Oregon mountains will have a fairly good upslope component and will also receive a decent amount of precipitation. Snow levels will be around 4-5000 feet today and Thursday lowering to 3-4000 feet by Friday. Surface winds will be increasing from the southwest Thu into Fri. This will help mix out the fog in the lower elevations. 94 .LONG TERM...Friday night through Wednesday...A shortwave trough is forecast to move across the area Friday night and Saturday with a chance for mainly mountain snow showers. Snow levels will be 2-3 thousand feet. There will be a lingering slight chance for mountain snow showers on Sunday. Otherwise A ridge of high pressure will build over the region for Monday and Tuesday for mostly dry conditions. Temperatures will be close to normal for this time of year. On Wednesday an upper level low will undercut the ridge and turn the upper flow southerly. This will increase moisture and result in a chance of showers and mountain snow showers with snow levels 1500-3000 feet. As of now the models are not depicting any major storms during this forecast period. 78 && .AVIATION...12Z TAFS...Widespread MVFR and IFR conditions are expected through the forecast period due to low CIGS and VSBYS in -RA and BR. Rain has tapered off early this morning but will redevelop this afternoon spreading west to east this evening and overnight. Winds will be light at KPDT...KYKM...KDLS and KPSC. At KRDM...KBDN...and KALW winds will increase by tonight to 10-15 kt. 78 && .PRELIMINARY POINT TEMPS/POPS... PDT 42 37 50 38 / 30 70 50 50 ALW 43 38 50 40 / 30 70 60 60 PSC 41 37 50 38 / 30 60 40 30 YKM 39 31 46 30 / 40 70 50 30 HRI 42 36 51 38 / 30 60 40 40 ELN 37 31 43 30 / 50 70 50 40 RDM 45 35 47 31 / 40 60 70 60 LGD 42 36 45 34 / 30 70 70 60 GCD 44 35 45 32 / 30 80 70 60 DLS 44 37 48 37 / 60 80 70 50 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. && $$ 94/78/78