Bordertown, Nevada Weather Forecast Discussion

337
FXUS65 KREV 070917
AFDREV
Area Forecast Discussion
National Weather Service Reno NV
217 AM PDT Sun Sep 7 2025
.KEY MESSAGES...
* Warm and dry weather along with breezy afternoon winds prevail
  again today.
* Increasing winds peak on Monday when travel and recreation impacts
  will be most likely.
* Fall-like weather arrives this week with well below normal
  temperatures, and increased shower and storm chances.
&&
.DISCUSSION...
For today, forecast guidance shows the CWA between an upper air
low over the Pacific and an upper air ridge over the Rocky
Mountains yielding a generally west-southwesterly flow aloft. At
the surface, the region looks to see slightly cooler temperatures
today compared to yesterday as well as another day of dry
conditions. Daytime high temperatures for the western NV valleys
will range between the lower to middle 80s while Sierra
communities expect highs in the upper 60s to middle 70s range.
Breezy winds out of the west/southwest gusting up to around 20-25
mph are in the forecast once again today with the Sierra ridgetops
seeing gusts potentially up to around 40 mph. These winds will
allow for some elevated fire weather concerns today especially in
the Sierra Front with minimum relative humidity values in the
upper teens. The region continues to see some smoke and haze
filter in from the Garnet Fire today particularly down in Mono and
Mineral Counties, so please continue to monitor the air quality
at airnow.gov if you have outdoor plans and are sensitive to
smoke. Low temperatures for tonight cool to the middle 40s to
middle 50s in valley areas while the higher elevations of the
Sierra have the middle 30s to middle 40s in the forecast.
On Monday, model guidance shows the Pacific low reaching the U.S.
coast around OR and northern CA during the day which will bring back
precipitation chances to the CWA. The Northeastern CA portions of
the CWA see a 20-40% chance for showers and isolated thunderstorms
on Monday evening with the Tahoe Basin and Northern Washoe County
seeing a 10-15% chance in the latest run of the NBM. Not
anticipating much QPF with this precipitation (up to a few
hundredths of an inch), but the remainder of the CWA looks to stay
mostly dry. However, the area winds expect to increase a bit
compared to Sunday with southwesterly/westerly winds gusting up to
around 25-30 mph in the forecast and the Sierra ridges seeing
gusts up to around 45 mph possible. There may be the potential for
some travel and recreation impacts with these winds on Monday, so
please watch for forecast updates as they become available. As
for area temperatures on Monday, the forecast calls for daytime
highs around 2-4 degrees cooler than those seen on Sunday.
Going through the middle of the work week, the upper low is
projected to reside over the Northwestern CONUS for the duration
allowing for shower and thunderstorm chances to spread more across
the CWA on Tuesday. Precipitation chances then look to increase to
around 40-60% on Wednesday and Thursday. Upon looking at the current
QPF amounts, Wednesday looks to potentially be the wetter of the two
days (just barely) with 24-hr QPF values between a trace and 0.3
inches while Thursday`s forecasted upper limit is around 0.2 inches.
Will be monitoring for a potential flood threat with back to back
days of increased precipitation chances though flooding chances
look to be on the low side at this time. Also worth mentioning is
that the highest elevations of the Sierra could see a dusting of
snow on these days. While area winds look to decrease midweek, so
do the area temperatures as the cooling trend continues. Sierra
communities have around a 40-70% chance of hitting the freezing
mark particularly on Wednesday and Thursday nights according to
the latest NBM probabilities while western NV lows range in the
40s to the lower 50s. Going into next weekend, a pattern change is
seen in the extended forecast as the low is projected to leave
the region allowing temperatures to warm and conditions to mostly
dry out. -078
&&
.AVIATION...
VFR conditions are expected once again today at all area TAF sites
with dry conditions and westerly surface winds gusting up to around
20-25 kts in the forecast. Smoke and haze continue to filter into
the region from the Garnet Fire in CA which will impact slantwise
visibilities especially at KMMH, but not anticipating a reduction in
flight rules at this time. Increased winds are in the forecast on
Monday with some precipitation chances returning that increase and
become more widespread by midweek. -078
&&
.REV Watches/Warnings/Advisories...
NV...None.
CA...None.
&&
$$

NWS REV Office Area Forecast Discussion