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FXUS65 KREV 092120 AFDREV

Area Forecast Discussion National Weather Service Reno NV 120 PM PST Sat Dec 9 2023

SYNOPSIS

A quiet pattern will be in store over the next week as high pressure maintains valley inversions, light winds, and dry conditions. Only a few light showers will be possible across far NE CA and NW Nevada late Sunday into Monday but overall dry conditions are expected into the start of next weekend.

DISCUSSION

A rather uneventful weather pattern will remain in place over the next week as dry conditions and near seasonable temperatures remain in place. For this weekend, high pressure along the west coast will strengthening and lead to some warming for Sunday and Monday with high temperatures warming 5-10 degrees above season averages. The main impact with this high in place will be strengthening inversions and light winds, particularly on Sunday, which may lead to potential degraded air quality as particulates remain trapped in valley areas.

However, there could be at least some increasing ventilation late Sunday into Monday as a shortwave trough brushes northern Nevada and provides a slight increase to northwest/northerly winds.
Along with the breezes will be 15-30% chance of light showers across the Surprise Valley and far northern Washoe/Lassen counties late Sunday into Monday.

Behind the trough, temperatures will cool but will still remain within a few degrees of season averages up through next weekend.
Overall, dry conditions will continue through much of next week with ensembles showing a larger scale trough developing across the eastern Pacific Basin towards next weekend. However, timing and potential precipitation amounts are quiet low confidence at this time as the trough is showing a potential to cut-off and slow down as it approaches the west coast. Fuentes

AVIATION

VFR conditions will prevail through the weekend aside from patchy areas of FZFG at KTRK overnight. Light winds and strong valley inversions may lead to hazy conditions down in lower valleys with only minor reductions to slantwise visibility expected.

A weak low pressure system brushing by to the north of the Sierra may increase Sierra ridgetop winds Sunday into Monday with gusts up to 45 knots possible by Sunday evening. This may yield areas of turbulence along the Sierra. Fuentes

REV Watches/Warnings/Advisories
NV...None.
CA...None.

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