FXUS65 KREV 272000

AFDREV



Area Forecast Discussion

National Weather Service Reno NV

100 PM PDT Mon Oct 27 2025



.KEY MESSAGES...



* A warming and drying trend is forecast to continue through this 

  week.



* Benign weather will remain through the end of October and into the 

  beginning of November.



&&



.DISCUSSION...



As the upper trough that brought the windy weekend weather to the 

region continues to move farther east, forecast guidance shows the 

NWS Reno County Warning Area (CWA) having a northwesterly flow aloft 

with a trailing upper ridge developing over the Western CONUS. This

ridge pattern continues through Tuesday, but then a PacNW trough 

is expected to brush past north of the CWA on Wednesday which 

changes the pattern slightly. By Thursday and Friday, ensemble 

guidance shows the ridge redeveloping over the CWA. Over the 

weekend, the amplitude of the upper ridge becomes suppressed 

allowing for a more westerly zonal flow over the CWA. 



With this pattern evolution aloft, the current forecast for the CWA 

calls for dry conditions with a slight warming trend through the 

week. By Friday, the daytime highs for the western NV valleys expect 

to be in the lower to middle 70s while higher elevation communities 

in the Sierra have forecasted highs in the middle to upper 60s. 

Overnight lows in the 30s and 40s are also forecast for the CWA through

the week. With temperatures warming to well above climatological 

normals by the end of the week, it does look to be a pleasant 

week for those with outdoor Halloween activities planned. Forecast

area winds also should be significantly lighter than those 

experienced over last weekend, so the risk of outdoor holiday 

decorations blowing away appears to be low at this time.



Models do show the potential for some fog forming tonight into 

tomorrow morning within the Sierra and Martis Valleys due to the 

recent precipitation, so please use caution if traveling through 

these areas as visibilities could be reduced. Otherwise, the skies

look to be mostly sunny and clear through the first half of the 

work week. The current forecast then calls for some cloud cover to

develop on Thursday and Friday to end October. -078



&&



.AVIATION...



VFR conditions are expected through the rest of today within the 

region as any lingering cloud cover looks to diminish going through 

the afternoon. Area winds are forecast to be considerably lighter 

compared to the winds experienced over the weekend. Some models

show the potential for fog to develop overnight around 28/06-07Z 

in the Martis and Sierra Valleys. Not enough forecast confidence 

yet to add it to the KTRK TAF, but will monitor and adjust the 

forecast if needed. -078 



&&



.REV Watches/Warnings/Advisories...

NV...None.

CA...None.

&&



$$