Out The Window - Caldor Fire smoke, meet Dixie Fire smoke. Views east from the NWS Reno office Monday evening - Mammoth Lakes ...
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Out The Window
Caldor Fire smoke, meet Dixie Fire smoke.
Views east from the NWS Reno office Monday evening.
Reno National Weather Service
Forecasting for the Sierra and western Nevada since 1905
What You Need to Know Up-Front Updated 9/1/21 @ 830 AM PDT
Key Points
●One More Day of Gusty W/SW Winds: Areas of critical fire weather conditions, but not as widespread nor long
duration as yesterday. Mainly looking at the Sierra Front for those winds over 30 MPH + low humidity. Winds
lessen a bit starting Thursday and becoming light & variable over the holiday weekend. It will remain fairly dry
however with limited humidity recoveries especially above valley floors through the weekend.
●Smoke - Nothing New Here: Expect to be dealing with degraded air quality into the weekend, especially
downwind (E/NE) of larger fires. Worst conditions South Lake-Carson City-Carson Valley-Virginia City and
Lassen/Plumas east across northern Washoe Co. Detailed smoke models only go out 36-48 hours.
●Any Moisture? Anything? Even in past active autumns, we haven’t see our first legit Pacific storm until mid to
late September, and am not seeing anything right now. However our simulations are showing potential for a
few t-storms early to mid next week. TBD on potential impacts and/or chance of beneficial rains.
Important Changes
● No real changes overnight. Improving signals for some form of thunderstorms at various times next week.
Reno National Weather Service
2 Forecasting for the Sierra and western Nevada since 1905
Situational Awareness - When Should I Freak Out?
NWS Reno’s 7-14 Day Scan for Upcoming Weather across the Eastern Sierra and Western Nevada
Wed 9/1 Thu 9/2 Fri 9/3 Sat 9/4 Sun 9/5 Mon 9/6 Tues 9/7 W2 9/8-14
Choppy lakes,
Light W/NW zephyr breezes each day, 15-20 mph. Brief Light and variable winds, 10-15 mph. A mix of E/NE and
Wind isolated road
period of light east winds Friday morning/early afternoon. W/NW wind directions.
travel impact.
Could see isolated t-storms E Sierra, No big wind
mainly Alpine and Mono Counties. scenarios but
Thunderstorms Nothing. 10-20% chance each day. Can’t rule also no large
out a storm or two up into Tahoe & W scale wetting
Nevada. rains either.
T-storms possible
Flooding No concerns. Wed-Fri next
week.
2-4 hours of
critical winds & Not nearly as much wind, but remaining dry with poor humidity recoveries Still light winds, slightly higher
Fire Weather
low RH, esp especially in mid-slope areas. humidity.
Sierra Front.
Easing back to near average temps. Favoring near
Unusual Temps Warming slightly, but only a few degrees above normal.
Could get somewhat cool Thurs & Fri AM - Sierra valleys freeze. normal temps.
Dense smoke immediately downwind Smoke/haze in the region but TBD depending on fire
Smoke TBD. TBD.
on major fires. Variable AQ elsewhere. activity. Lighter winds make smoke prediction less certain.
What Does This
Mean? Integrates Low Moderate High
No worries Really bad
impacts and freakoutness freakoutness freakoutness
confidence Reno National Weather Service
3 Forecasting for the Sierra and western Nevada since 1905
Still Gusty But More Localized Versus Yesterday
W/SW winds gusting on the
order of 25-35 MPH for this
afternoon-evening. More
short-lived localized critical
conditions, primarily along
Sierra Front but also wind
prone locations in other
areas including Tahoe, NE
California.
Critical conditions will
certainly be a factor for
significant ongoing wildfires.
Winds coming from the SW-W Reno National Weather Service
4 Forecasting for the Sierra and western Nevada since 1905
Air Quality Update - Wednesday AM
Link to this map and more data: fire.airnow.gov
Reno National Weather Service
5 Forecasting for the Sierra and western Nevada since 1905
Smoke Outlook: Today and Tonight
Diffuse smoke
region wide early
this morning.
Increased SW-W
wind speeds will
focus the densest
smoke immediately
downwind of
ongoing wildfires
with clearing
elsewhere this
afternoon.
Reno National Weather Service
6 Forecasting for the Sierra and western Nevada since 1905
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