Air Resources Laboratory / Special Operations And Research Division (SORD)
Weather Advisories:
Nevada National Security Site Weather Forecast
Air Resources Laboratory/Special Operations and Research Division
1430 PST Fri Dec 19 2025
Official Sunrise Saturday 653 PST
Official Sunset Saturday 1631 PST
Forecaster: J Wood
.Forecast Summary...Weakening high pressure will be over our area through this weekend. It will keep the storm track to the north as several Pacific storms move into northern California. The Sierra Nevada will intercept most of their moisture leaving our area dry with variable amounts of clouds. There will also be a modest increase in afternoon winds. Looking ahead to next week, the storm track is forecast to drop southward and be aimed more at southern California into Nevada by mid-week. It will direct a significant Pacific storm through our area bringing widespread precipitation and gusty winds with it. This storm looks fairly mild so precipitation will be in the form of rain for all but the highest elevations. Unsettled conditions then look to continue through the end of the week.
---For The Nevada National Security Site---
.Tonight...Partly cloudy. Variable winds 5 to 15 mph. Low temperatures 34 to 41 on the mesas, 30 to 35 on the dry lakes, 39 to 46 at the lower elevations, 45 at Mercury.
.Saturday...Mostly cloudy. Northeast winds 5 to 15 mph in the morning becoming southwest 10 to 25 mph in the afternoon. High temperatures 48 to 55 on the mesas, 60 to 67 at the lower elevations, 63 at Mercury.
.Saturday Night...Partly cloudy. Southeast winds 5 to 15 mph. Low temperatures 36 to 43 on the mesas, 35 to 40 on the dry lakes, 40 to 48 at the lower elevations, 48 at Mercury.
.Sunday...Partly cloudy. South winds 10 to 25 mph. High temperatures 48 to 55 on the mesas, 60 to 67 at the lower elevations, 64 at Mercury.
.Monday...Mostly cloudy. South winds 15 to 30 mph. Low temperatures 33 to 40 on the mesas, 40 to 45 on the dry lakes, 41 to 49 at the lower elevations, 48 at Mercury. High temperatures 48 to 55 on the mesas, 59 to 66 at the lower elevations, 62 at Mercury.
.Tuesday...Mostly cloudy and windy. Southeast winds 20 to 35 mph. Low temperatures 32 to 39 on the mesas, 45 to 50 on the dry lakes, 43 to 50 at the lower elevations, 50 at Mercury. High temperatures 45 to 52 on the mesas, 57 to 65 at the lower elevations, 62 at Mercury.
.Wednesday...Showers likely and windy. Southeast winds 20 to 35 mph. Low temperatures 32 to 39 on the mesas, 42 to 47 on the dry lakes, 43 to 50 at the lower elevations, 48 at Mercury. High temperatures 40 to 47 on the mesas, 52 to 58 at the lower elevations, 54 at Mercury.
.Thursday...Showers likely and windy. South winds 20 to 35 mph. Low temperatures 32 to 39 on the mesas, 42 to 47 on the dry lakes, 41 to 48 at the lower elevations, 46 at Mercury. High temperatures 35 to 42 on the mesas, 47 to 54 at the lower elevations, 51 at Mercury.
-End Forecast---J Wood
Weather questions or reports should be directed to the Duty Forecaster at 5-1255.
Air Resources Laboratory/Special Operations and Research Division
1430 PST Fri Dec 19 2025
Official Sunrise Saturday 653 PST
Official Sunset Saturday 1631 PST
Forecaster: J Wood
NNSS Forecast Weather Threat Matrix
Sat 12/20
Sun 12/21
Mon 12/22
Tue 12/23
Wed 12/24
Thu 12/25
None.
Wind.
Wind.
Wind.
Wind/Rain.
Wind/Rain.
Threat/Impacts Legend
None/Low
Minor
Moderate
Major
.Forecast Summary...Weakening high pressure will be over our area through this weekend. It will keep the storm track to the north as several Pacific storms move into northern California. The Sierra Nevada will intercept most of their moisture leaving our area dry with variable amounts of clouds. There will also be a modest increase in afternoon winds. Looking ahead to next week, the storm track is forecast to drop southward and be aimed more at southern California into Nevada by mid-week. It will direct a significant Pacific storm through our area bringing widespread precipitation and gusty winds with it. This storm looks fairly mild so precipitation will be in the form of rain for all but the highest elevations. Unsettled conditions then look to continue through the end of the week.
---For The Nevada National Security Site---
.Tonight...Partly cloudy. Variable winds 5 to 15 mph. Low temperatures 34 to 41 on the mesas, 30 to 35 on the dry lakes, 39 to 46 at the lower elevations, 45 at Mercury.
.Saturday...Mostly cloudy. Northeast winds 5 to 15 mph in the morning becoming southwest 10 to 25 mph in the afternoon. High temperatures 48 to 55 on the mesas, 60 to 67 at the lower elevations, 63 at Mercury.
.Saturday Night...Partly cloudy. Southeast winds 5 to 15 mph. Low temperatures 36 to 43 on the mesas, 35 to 40 on the dry lakes, 40 to 48 at the lower elevations, 48 at Mercury.
.Sunday...Partly cloudy. South winds 10 to 25 mph. High temperatures 48 to 55 on the mesas, 60 to 67 at the lower elevations, 64 at Mercury.
.Monday...Mostly cloudy. South winds 15 to 30 mph. Low temperatures 33 to 40 on the mesas, 40 to 45 on the dry lakes, 41 to 49 at the lower elevations, 48 at Mercury. High temperatures 48 to 55 on the mesas, 59 to 66 at the lower elevations, 62 at Mercury.
.Tuesday...Mostly cloudy and windy. Southeast winds 20 to 35 mph. Low temperatures 32 to 39 on the mesas, 45 to 50 on the dry lakes, 43 to 50 at the lower elevations, 50 at Mercury. High temperatures 45 to 52 on the mesas, 57 to 65 at the lower elevations, 62 at Mercury.
.Wednesday...Showers likely and windy. Southeast winds 20 to 35 mph. Low temperatures 32 to 39 on the mesas, 42 to 47 on the dry lakes, 43 to 50 at the lower elevations, 48 at Mercury. High temperatures 40 to 47 on the mesas, 52 to 58 at the lower elevations, 54 at Mercury.
.Thursday...Showers likely and windy. South winds 20 to 35 mph. Low temperatures 32 to 39 on the mesas, 42 to 47 on the dry lakes, 41 to 48 at the lower elevations, 46 at Mercury. High temperatures 35 to 42 on the mesas, 47 to 54 at the lower elevations, 51 at Mercury.
-End Forecast---J Wood
Weather questions or reports should be directed to the Duty Forecaster at 5-1255.