Marine Weather and Tides
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 5:29AM||Sunset 8:31PM||Monday June 21, 2021 12:18 AM PDT (07:18 UTC)||Moonrise 5:16PM||Moonset 2:59AM||Illumination 86%|
7 Day Forecast for Marine Location Near Spanish Springs, NVHourly EDIT Help
Area Discussion for - Reno, NV  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KREV 210347 AFDREV
Area Forecast Discussion National Weather Service Reno NV 847 PM PDT Sun Jun 20 2021
Confidence in the threat of isolated to scattered thunderstorms Monday night through early Tuesday morning for northeast California and far northwestern Nevada continues to increase. Models project a negatively tilted trough to begin pushing into the California coast Monday afternoon. Height contours will tighten aloft and simulations show a 500mb jet forming over northeastern California Monday night creating enough mid level forcing to kick off some nocturnal thunderstorms. Steering level winds will be 20+ mph resulting in storm motions that promote dry lightning. The best chances for thunderstorms will be located over northern Lassen, eastern Modoc, and northern Washoe counties. Given the recent record heat, very dry timber, curing finer fuels, and potential for dry lightning, a Fire Weather Watch has been issued.
PREVIOUS DISCUSSION. /Issued 258 PM PDT Sun Jun 20 2021/
Hot temperatures continue today with a few degrees of cooling by Monday. Daytime heat impacts are likely across the lower valleys of western Nevada. Breezy winds are expected the first half of this coming week, with temperatures cooling to near normal by midweek. Another heatwave with chances for thunderstorms is possible going into next weekend.
The biggest change to the forecast was to introduce a chance for nocturnal thunderstorms as far south as Donner Summit Monday night into early Tuesday as the trough pushes into the West.
Smoke from regional wildfires continues to bring haze to northeast California and western Nevada with a reduction in slantwise visibility. Some of the denser particulates may reduce the air quality for some areas across Plumas, Lassen, and northern Washoe counties into this evening. However, with the trough approaching the West Coast Monday, wind speeds and mixing will increase, which will help to migrate the haze and smoke out away from our area.
The heat continues this afternoon for much of the region, with some record highs possible, before a gradual cooling occurs through the middle of the week. The Heat Advisory over the Greater Reno-Sparks- Carson City-Minden area will expire this evening at 8 PM PDT. With the ridge axis beginning to move eastward overnight, heat impacts will still be expected across the lower valleys of the Basin and Range of western Nevada Monday. Therefore, we will keep the Heat Advisory for these areas through its expiration at 8 PM PDT Monday. Temperatures will return to just above normal by the middle of the week as a trough moves into northern California and Oregon Monday into Tuesday. Upper 80s to low 90s are expected in western Nevada valleys with 70s to around 80s possible for Sierra valley locations.
As the trough makes landfall over northern California and Oregon Monday night into Tuesday, southwest to west winds will increase across the area and so will thunderstorm chances. Heightened fire weather concerns are expected early this week, especially after the past week of heat which dehydrated the fuels across the region even further. Please see the fire weather section below for more information on the winds and thunderstorm potential Monday night into the middle of the week.
The trough will fill and eject northeast by mid-to-late week, with another strong area of high pressure becoming increasingly likely to build over our region next weekend. There is remarkable agreement between the global ensembles regarding this occurring. Triple-digit heat looks to make a return to the lower valleys of western Nevada, with more record heat possible for locations regionwide with 500 hPa heights reaching near 594 dm over the Sierra and far western Nevada. Thunderstorm chances should increase as the surface heating builds into the latter half of the weekend.
Density altitude concerns will continue into Monday as hot temperatures linger. A cooling trend will start Tuesday into Thursday with temperatures getting closer to normal.
Typical zephyr breezes are expected the rest of this afternoon and evening with gusts to 20-25 kts. A trough approaches the West Coast Monday into Tuesday, which will increase breezes to 25-30 kts, with locally higher winds expected over the Basin and Range of western Nevada late Monday afternoon/evening and the Eastern Sierra Tuesday. Some light turbulence is possible near and east of the Sierra Monday into Tuesday.
Chances for showers and thunderstorms increase Monday into Tuesday as the trough approaches the West Coast. The best chances will be from the Tahoe Basin/Sierra Front northward into Oregon beginning Monday evening and lasting into Tuesday morning. These storms look to be moving relatively fast, with the main impacts being gusty and erratic outflow winds, cloud-to-ground lightning, and small hail/localized heavy rainfall.
FIRE WEATHER .
* Hot and dry with late day winds through this evening. Stable conditions will limit thunderstorm development today.
* Breezy and Dry - - A low pressure system will approach Monday- Tuesday bringing enhanced zephyr winds, primarily north of Highway 50 Monday afternoon/evening. Gusts 30-35 mph will be common, locally to 40 mph in favored windprone spots particularly on Monday. The winds will be strongest between 4pm and 7pm along the Sierra Front, stretching from Carson City to Doyle and then moving east in a line from Gerlach-Trinity Junction-Fallon. The duration of the winds will be the limiting factor for Monday afternoon, with localized areas exceeding 30-35 mph for a handful of hours. While the winds will still be breezy on Tuesday, the gusts will drop down into the 20 to 30 mph range. It will certainly continue to be very dry with humidity levels into the single digits and lower teens with poor-moderate at best nighttime recoveries.
* Dry Thunderstorms and Lightning Potential - - Thunderstorms are possible Monday evening into early Tuesday morning from Tahoe Basin/Sierra Front northward to the Oregon border. The best potential and coverage will be north of Portola and Gerlach. These storms will be elevated and fast-moving due to increasing south flow aloft. Low levels will remain very dry with poor to moderate recoveries, only limited precipitation and gusty outflow winds. Any lightning will result in an increased risk of new fire starts. Coverage still looks isolated for now, but if the low track changes then the potential for storms will also change. Thunderstorm potential will stick around through the week as the low tracks across the Sierra and western Nevada.
REV Watches/Warnings/Advisories. NV . Heat Advisory until 8 PM PDT Monday NVZ001-004-005.
Fire Weather Watch from Monday evening through Tuesday morning NVZ458.
CA . Fire Weather Watch from Monday evening through Tuesday morning CAZ270-271-278.
For more information from the National Weather Service visit . http://weather.gov/reno
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|Reno, Reno Tahoe International Airport, NV||17 mi||23 min||N 5||10.00 mi||Fair||79°F||30°F||17%||1010.5 hPa|
|Reno/Stead, NV||18 mi||23 min||NW 5||10.00 mi||Fair||73°F||25°F||16%||1019.3 hPa|
Link to 5 minute data for KRNO
Wind History from RNO (wind in knots)
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|2 days ago||Calm||S||W||Calm||W||SW||W||N||SE||SE||Calm||Calm||NE||W||W||W|
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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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