855 FXUS65 KREV 050738 AFDREVArea Forecast Discussion National Weather Service Reno NV 1238 AM PDT Fri Sep 5 2025
.KEY MESSAGES...
* Afternoon thunderstorms with localized flash flooding potential remain through today before chances diminish for the weekend.
* Smoke from nearby wildfires will continue to filter into the region, producing hazy skies and air quality impacts.
* Hints of fall make an appearance next week with much cooler temperatures, breezy winds, and increased shower and storm chances.
&&
.DISCUSSION... An upper level trough off the Pacific Northwest coast will bring about notable changes in the weather through the weekend into next week. If you`ve been patiently waiting for that sweater weather, then next week is looking like your best bet. Let`s take a look at today through the weekend before we get too excited about the upcoming fall-like conditions next week.
Looks like we will have one last day of thunderstorms with the best potential for showers and storms east of Highway 95, south of Highway 50 and also along the NV/OR border. Localized flooding still remains a real possibility with sufficient moisture remaining across the region. Smoke and haze, unfortunately, continue to be a concern going into the end of the work week. Nearby wildfires, mainly the Garnet fire, continue to produce smoke that is impacting air quality and visibility for portions of the Eastern Sierra each day. Keep an eye on the air quality at fire.airnow.gov
As previously mentioned, an upper level trough will slowly make its trek toward the Sierra and western Nevada this weekend. It`s arrival will allow for an uptick in mid slope and ridge level winds, especially by Saturday and Sunday. Surface wind gusts may pick up each afternoon, but peak wind gusts will be marginal (around 30 mph). The strongest winds may arrive on Monday with gusts 40 mph possible (35% chance Mammoth Lakes, 45% chance Reno). The increase in winds will only be a marginal for fire weather, since it does appear that humidity values will come up enough to mitigate those concerns. As the trough passes by, temperatures will drop below average region-wide with potential for some overnight freezing temperatures for the High Sierra and Sierra communities midweek. With the drop in temperatures and the return of showers, we`re seeing hints for some high elevation flurries. There are 15-30% chances for a trace of snow for the high Sierra, including Mammoth Mountain, Sonora Pass, Tioga Pass from Wednesday PM into Thursday.
-Edan
&&
.AVIATION... KTRK will see another round of fog this morning with it breaking up around 15-17z.
Afternoon showers and thunderstorms will form again between 19z-01Z. KMMH/KNFL/KLOL have a 15% chance of a storm, while KRNO/KCXP/KMEV/KTRK/KTVL will be at 5% chances. Drier conditions will limit storm development over the weekend.
Smoke from nearby wildfires will continue to impact slantwise visibilities each morning and evening into the weekend.
-Edan
&&
.REV Watches/Warnings/Advisories... NV...None. CA...None. &&
$$
NWS REV Office Area Forecast Discussion