Monday, September20, 2021
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Marine Weather and Tides
Reno, NV

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:43AMSunset 7:02PM Sunday September 19, 2021 9:29 PM PDT (04:29 UTC) Moonrise 6:54PMMoonset 5:10AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Reno, NV
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location: 39.47, -119.78     debug


Area Discussion for - Reno, NV
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FXUS65 KREV 191917 AFDREV

Area Forecast Discussion National Weather Service Reno NV 1217 PM PDT Sun Sep 19 2021

SYNOPSIS.

After a cool start Monday with frosts and freezes in some valleys, high pressure will control our weather much of this week. This means warming temperatures with dry conditions persisting. Gusty winds are possible at times, such as on Wednesday, however no strong wind events are expected this week. There is a chance of showers next weekend however confidence remains quite low.

DISCUSSION.

* TEMPERATURES: Ensemble guidance generally showing ridging to be the dominant weather driver this week. As such after a cool start Monday into Tuesday morning, we should see daytime temps warming to just above normal mid to late this week. Near- freezing temps are likely in rural and suburban valleys Monday morning, with just isolated spots of that Tuesday morning.

* WINDS: Cold front rolling through today will keep W/NW winds breezy into this evening, with lake recreation and localized road travel impacts. Gusts on the order of 30-40 MPH possible across the E Sierra, for example. NE flow takes effect Monday with some breezy periods on Tahoe and along the Sierra crest, otherwise no impact. We'll likely see an increase in W/SW winds of 25-35 MPH gusts on Wednesday as quick little upper wave passes by, with some spots of critical fire weather and road travel impacts. Roughly 40% of ECMWF EPS members showing stronger gusts over 35 MPH along Sierra Front, so worth keeping an eye on. Behind that wave, a period of E/NE winds is likely Thursday-Friday.

* SMOKE: With a turn to more N/NE winds, we're smoke free on the east side through Monday night per latest HRRR Smoke models. Starting Tuesday NAM3km guidance showing a light W/SW flow kicking in over the Sierra, and that could be enough to send smoke that's bottled up on the west slopes over to our region. Mammoth has the highest risk of seeing appreciable smoke impacts but can't rule out haze over Tahoe, W Nevada either. That may persist into Wednesday as well but this far out confidence is quite limited.

* ANOTHER WEEKEND STORM? There are several ensemble members showing potential for light precipitation next weekend, as a weak upper trough develops off the CA coastline. Basically a 50/50 split in the ensemble clusters showing a trough outcome versus the ridging holding on over CA/NV. To that point NBM QPF guidance along the Sierra crest from Mammoth to Donner Pass ranges from zero to 0.5" of precipitation Saturday-Sunday. Anyways, just like this past storm don't count on anything meaningful rainfall-wise, but don't count it out either. NBM guidance also showing a small chance of t-storms over E Sierra. Not a big wind pattern with less than 10% of ensembles showing appreciable wind gusts over 35 MPH next weekend.

-Chris

AVIATION.

Cold front moving through will continue the breezy W/NW winds through this evening, especially over the Eastern Sierra near MMH and eastward to around BIH, HTH, and TPH. Gusts on the order of 30-35 knots possible with rough rides likely. Sierra crest observations near Mammoth earlier showing 65-70 kt gusts.

Winds will subside and turn more N/NE tonight and into Monday. East of the Sierra into Nevada this pattern isn't generally significant for wind impacts, with just some low-end 20kt gusts here and there.

With that NE flow smoke and haze are not expected for the E Sierra and W Nevada through at least Monday night. However that could change stating Tuesday as flow over the mountains turns light SW. That could bring any smoke bottled up on the west slopes over onto our side. MMH has highest risk of MVFR or worse in smoke/haze Tuesday but can't rule out some haze for TVL, TRK, and even into RNO, CXP, MEV, and NFL.

-Chris

FIRE WEATHER.

Winds remain breezy this afternoon behind the cold front, but are corresponding with higher humidity. The greatest areas of concern through this evening will be the lower elevations of the Eastern Sierra and Mineral County, which tend to funnel the northwest winds efficiently and also will have min RH values in the 12-20% range.

Winds will turn NE-E overnight and will be gusty for the Sierra crest and into western slopes where our neighboring offices have Red Flag Warnings in effect.

After a couple of cooler days, a warming and drying trend will begin Tuesday onward. A weak passing system may enhance westerly winds on Wednesday, but at this point it appears critical conditions will remain isolated. -Dawn

REV Watches/Warnings/Advisories. NV . Lake Wind Advisory until 11 PM PDT this evening for Pyramid Lake in NVZ004.

Lake Wind Advisory until 5 PM PDT this afternoon for Lake Tahoe in NVZ002.

CA . Lake Wind Advisory until 5 PM PDT this afternoon for Lake Tahoe in CAZ072.



For more information from the National Weather Service visit . http://weather.gov/reno


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Reno, Reno Tahoe International Airport, NV3 mi34 minN 910.00 miA Few Clouds59°F31°F35%1018.7 hPa
Reno/Stead, NV15 mi34 minN 010.00 miFair54°F27°F35%1023.7 hPa
Carson City Airport, NV19 mi39 minVar 610.00 miFair61°F30°F31%1022.3 hPa
Truckee-Tahoe, CA22 mi51 minN 010.00 miFair48°F27°F43%1023.4 hPa

Link to 5 minute data for KRNO

Wind History from RNO (wind in knots)
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Last 24hrSW11
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1 day agoNW5CalmSE3CalmS3CalmCalmS4NW5CalmCalmNE3SW10S16
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2 days agoW3W5SW5CalmS4CalmCalmCalm3S3S3CalmCalmCalmCalmCalmSW54SE4W14W13
G19
NW8W8W3

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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