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
0630 PST Fri May 29 2026
Official Sunset Friday 1856 PST
Official Sunrise Saturday 427 PST
Forecaster: J Callanan
.Forecast Summary...Low pressure will influence the site today. Isolated rain showers will develop this afternoon, primarily over the mesas. Winds will carry a westerly component on the backside of the low and remain well below advisory criteria. As the system moves east, dry and favorable conditions will return to the site. A warming trend will begin Saturday, and winds will return to a more typical pattern. Temperatures will continue to climb into next week.
---For The Nevada National Security Site---
.Today...Mostly cloudy. Southwest winds 10 to 20 mph. Isolated rain showers. High temperatures 59 to 66 on the mesas, 70 to 77 at the lower elevations, 73 at Mercury.
.Tonight...Mostly clear. Northeast winds 5 to 15 mph. Low temperatures 44 to 51 on the mesas, 44 to 51 on the dry lakes, 49 to 56 at the lower elevations, 54 at Mercury.
.Saturday...Partly cloudy. Southwest winds 10 to 25 mph. High temperatures 67 to 75 on the mesas, 78 to 85 at the lower elevations, 82 at Mercury.
.Saturday Night...Mostly clear. Northeast winds 5 to 15 mph. Low temperatures 48 to 55 on the mesas, 48 to 55 on the dry lakes, 53 to 60 at the lower elevations, 58 at Mercury.
.Sunday...Sunny. Southwest winds 10 to 25 mph. Low temperatures 51 to 58 on the mesas, 54 to 61 on the dry lakes, 58 to 65 at the lower elevations, 63 at Mercury. High temperatures 72 to 79 on the mesas, 84 to 91 at the lower elevations, 87 at Mercury.
.Monday...Sunny. Southwest winds 10 to 20 mph. Low temperatures 54 to 61 on the mesas, 56 to 63 on the dry lakes, 60 to 67 at the lower elevations, 66 at Mercury. High temperatures 76 to 83 on the mesas, 88 to 95 at the lower elevations, 92 at Mercury.
.Tuesday...Sunny. Southwest winds 10 to 20 mph. Low temperatures 55 to 62 on the mesas, 58 to 65 on the dry lakes, 63 to 70 at the lower elevations, 68 at Mercury. High temperatures 79 to 86 on the mesas, 91 to 98 at the lower elevations, 95 at Mercury.
.Wednesday...Sunny. Southwest winds 10 to 20 mph. Low temperatures 57 to 64 on the mesas, 59 to 66 on the dry lakes, 64 to 71 at the lower elevations, 69 at Mercury. High temperatures 80 to 87 on the mesas, 92 to 99 at the lower elevations, 96 at Mercury.
.Thursday...Sunny. Southwest winds 10 to 20 mph. Low temperatures 58 to 65 on the mesas, 60 to 67 on the dry lakes, 65 to 72 at the lower elevations, 70 at Mercury. High temperatures 81 to 88 on the mesas, 93 to 100 at the lower elevations, 97 at Mercury.
-End Forecast---J Callanan
Weather questions or reports should be directed to the Duty Forecaster at 5-1255.
Air Resources Laboratory/Special Operations and Research Division
0630 PST Fri May 29 2026
Official Sunset Friday 1856 PST
Official Sunrise Saturday 427 PST
Forecaster: J Callanan
NNSS Forecast Weather Threat Matrix
Fri 5/29
Sat 5/30
Sun 5/31
Mon 6/01
Tue 6/02
Wed 6/03
Thu 6/04
None
None
None
None
None
None
None
Threat/Impacts Legend
None/Low
Minor
Moderate
Major
.Forecast Summary...Low pressure will influence the site today. Isolated rain showers will develop this afternoon, primarily over the mesas. Winds will carry a westerly component on the backside of the low and remain well below advisory criteria. As the system moves east, dry and favorable conditions will return to the site. A warming trend will begin Saturday, and winds will return to a more typical pattern. Temperatures will continue to climb into next week.
---For The Nevada National Security Site---
.Today...Mostly cloudy. Southwest winds 10 to 20 mph. Isolated rain showers. High temperatures 59 to 66 on the mesas, 70 to 77 at the lower elevations, 73 at Mercury.
.Tonight...Mostly clear. Northeast winds 5 to 15 mph. Low temperatures 44 to 51 on the mesas, 44 to 51 on the dry lakes, 49 to 56 at the lower elevations, 54 at Mercury.
.Saturday...Partly cloudy. Southwest winds 10 to 25 mph. High temperatures 67 to 75 on the mesas, 78 to 85 at the lower elevations, 82 at Mercury.
.Saturday Night...Mostly clear. Northeast winds 5 to 15 mph. Low temperatures 48 to 55 on the mesas, 48 to 55 on the dry lakes, 53 to 60 at the lower elevations, 58 at Mercury.
.Sunday...Sunny. Southwest winds 10 to 25 mph. Low temperatures 51 to 58 on the mesas, 54 to 61 on the dry lakes, 58 to 65 at the lower elevations, 63 at Mercury. High temperatures 72 to 79 on the mesas, 84 to 91 at the lower elevations, 87 at Mercury.
.Monday...Sunny. Southwest winds 10 to 20 mph. Low temperatures 54 to 61 on the mesas, 56 to 63 on the dry lakes, 60 to 67 at the lower elevations, 66 at Mercury. High temperatures 76 to 83 on the mesas, 88 to 95 at the lower elevations, 92 at Mercury.
.Tuesday...Sunny. Southwest winds 10 to 20 mph. Low temperatures 55 to 62 on the mesas, 58 to 65 on the dry lakes, 63 to 70 at the lower elevations, 68 at Mercury. High temperatures 79 to 86 on the mesas, 91 to 98 at the lower elevations, 95 at Mercury.
.Wednesday...Sunny. Southwest winds 10 to 20 mph. Low temperatures 57 to 64 on the mesas, 59 to 66 on the dry lakes, 64 to 71 at the lower elevations, 69 at Mercury. High temperatures 80 to 87 on the mesas, 92 to 99 at the lower elevations, 96 at Mercury.
.Thursday...Sunny. Southwest winds 10 to 20 mph. Low temperatures 58 to 65 on the mesas, 60 to 67 on the dry lakes, 65 to 72 at the lower elevations, 70 at Mercury. High temperatures 81 to 88 on the mesas, 93 to 100 at the lower elevations, 97 at Mercury.
-End Forecast---J Callanan
Weather questions or reports should be directed to the Duty Forecaster at 5-1255.