672 FXUS65 KREV 131924 AFDREVArea Forecast Discussion National Weather Service Reno NV 1224 PM PDT Sat Sep 13 2025
.KEY MESSAGES...
* The next chance of showers returns Sunday, favoring northeast CA and far northwest NV, along with increasing breezes.
* Warmer temperatures are expected through next week along with generally dry conditions.
* Shower and thunderstorm chances may return as early as Thursday for areas south of US-50.
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.DISCUSSION...
Current visible satellite imagery has cumulus clouds developing along mountain ridges. Otherwise, there are no significant impacts today. This is all thanks to a weak upper level ridge that has just moved in. However, an upper level shortwave trough swings from the northern Pacific into the PacNW tonight.
This system will affect the Surprise Valley and northern Washoe near the Oregon border tomorrow. Increasing winds will be the main concern, especially in mountain ridges as far south as the Tahoe Basin and northern NV with gusts in the 20-30 mph range. Showers and maybe a storm or two have a 10-30% chance of developing in the Surprise Valley and northern Washoe based on the HREF. Otherwise, the rest of the area has less than 5% chance of any precipitation.
Starting on Monday, another upper ridge arrives from the west. It remains around the Great Basin through Wednesday, before it continues its eastward trajectory. Meanwhile, a slow warming trend prevails along with mostly clear skies, and light winds. Temperatures will bounce back to seasonal values by Tuesday and just above average by Wednesday.
The weather pattern changes again on Thursday with the approach of the next upper level storm system. However, models start to diverge at this point. So, we are uncertain about the details. Anyway, the observed trend for late week into the weekend indicates a slight cool down to near average temperatures, an increase in afternoon winds with a 20-40% chance of gusts exceeding 30 mph, and low chances for shower and thunderstorms returning mainly for areas south of US-50. So, impacts appear minimal at the moment, but more details to come in the next few days.
-HC
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.AVIATION...
Mostly VFR conditions expected through Sunday evening. Isolated showers and maybe a storm or two have a 10-30% chance of occurring tomorrow afternoon near the OR border leading to MVFR conditions due to VIS reductions. Fog may return to KTRK after 10Z tonight. Winds will be generally light and VRB, but become from the west 5-10 kts between 21Z-03Z both days. Minor LLWS and turbulence concerns are likely starting after 06Z, especially near area mountains.
-HC
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.REV Watches/Warnings/Advisories... NV...None. CA...None.
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NWS REV Office Area Forecast Discussion