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
1400 PST Tue Sep 15 2026
Official Sunrise Wednesday 527 PST
Official Sunset Wednesday 1750 PST
Forecaster: J Callanan
.Forecast Summary...As an upstream low continues to progress towards the operating area. Winds will remain elevated tonight, Wednesday, and Thursday. Due to the lack of moisture associated with the pressure system, this will primarily be a wind event. Although temperatures will decrease and increase with the progression of the system, temperatures will remain relatively steady. Beginning Friday, more favorable weather will briefly return to the area as ridging builds overhead. Starting Monday, a secondary low-pressure system will develop off the coast of central California.
---For The Nevada National Security Site---
.Tonight...Clear. Southwest winds 10 to 25 mph gusting to 39 mph, becoming Southwest 10 to 20 mph overnight. Low temperatures 49 to 56 on the mesas, 50 to 54 on the dry lakes, 55 to 62 at the lower elevations, 69 at Mercury.
.Wednesday...Partly cloudy. Southerly winds 10 to 25 mph gusting to 42 mph. High temperatures 73 to 80 on the mesas, 84 to 91 at the lower elevations, 88 at Mercury.
.Wednesday Night...Partly cloudy. Southerly winds 10 to 25 mph gusting to 37 mph becoming southerly 10 to 22 mph overnight. Low temperatures 45 to 52 on the mesas, 46 to 50 on the dry lakes, 52 to 59 at the lower elevations, 66 at Mercury. High temperatures 73 to 80 on the mesas, 84 to 91 at the lower elevations, 88 at Mercury.
.Thursday...Mostly sunny. Southerly winds 10 to 25 mph gusting to 40 mph. High temperatures 73 to 80 on the mesas, 84 to 91 at the lower elevations, 88 at Mercury.
.Friday...Sunny. Southerly winds 10 to 25 mph. Low temperatures 45 to 52 on the mesas, 45 to 49 on the dry lakes, 52 to 59 at the lower elevations, 65 at Mercury. High temperatures 76 to 83 on the mesas, 86 to 93 at the lower elevations, 90 at Mercury.
.Saturday...Sunny. Southerly winds 10 to 25 mph. Low temperatures 47 to 54 on the mesas, 47 to 51 on the dry lakes, 53 to 60 at the lower elevations, 66 at Mercury. High temperatures 77 to 84 on the mesas, 87 to 94 at the lower elevations, 91 at Mercury.
.Sunday...Partly cloudy. Southerly winds 10 to 25 mph. Low temperatures 48 to 55 on the mesas, 49 to 53 on the dry lakes, 55 to 62 at the lower elevations, 68 at Mercury. High temperatures 77 to 84 on the mesas, 88 to 95 at the lower elevations, 92 at Mercury.
.Monday...Partly cloudy with a slight chance for rain showers and thunderstorms. Southerly winds 10 to 25 mph with gusts up to 32mph. Low temperatures 45 to 52 on the mesas, 46 to 50 on the dry lakes, 52 to 59 at the lower elevations, 65 at Mercury. High temperatures 73 to 80 on the mesas, 84 to 91 at the lower elevations, 89 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
1400 PST Tue Sep 15 2026
Official Sunrise Wednesday 527 PST
Official Sunset Wednesday 1750 PST
Forecaster: J Callanan
NNSS Forecast Weather Threat Matrix
Wed 9/16
Thu 9/17
Fri 9/18
Sat 9/19
Sun 9/20
Mon 9/21
Wind
Wind
None
None
None
Wind / Rain
Threat/Impacts Legend
None/Low
Minor
Moderate
Major
.Forecast Summary...As an upstream low continues to progress towards the operating area. Winds will remain elevated tonight, Wednesday, and Thursday. Due to the lack of moisture associated with the pressure system, this will primarily be a wind event. Although temperatures will decrease and increase with the progression of the system, temperatures will remain relatively steady. Beginning Friday, more favorable weather will briefly return to the area as ridging builds overhead. Starting Monday, a secondary low-pressure system will develop off the coast of central California.
---For The Nevada National Security Site---
.Tonight...Clear. Southwest winds 10 to 25 mph gusting to 39 mph, becoming Southwest 10 to 20 mph overnight. Low temperatures 49 to 56 on the mesas, 50 to 54 on the dry lakes, 55 to 62 at the lower elevations, 69 at Mercury.
.Wednesday...Partly cloudy. Southerly winds 10 to 25 mph gusting to 42 mph. High temperatures 73 to 80 on the mesas, 84 to 91 at the lower elevations, 88 at Mercury.
.Wednesday Night...Partly cloudy. Southerly winds 10 to 25 mph gusting to 37 mph becoming southerly 10 to 22 mph overnight. Low temperatures 45 to 52 on the mesas, 46 to 50 on the dry lakes, 52 to 59 at the lower elevations, 66 at Mercury. High temperatures 73 to 80 on the mesas, 84 to 91 at the lower elevations, 88 at Mercury.
.Thursday...Mostly sunny. Southerly winds 10 to 25 mph gusting to 40 mph. High temperatures 73 to 80 on the mesas, 84 to 91 at the lower elevations, 88 at Mercury.
.Friday...Sunny. Southerly winds 10 to 25 mph. Low temperatures 45 to 52 on the mesas, 45 to 49 on the dry lakes, 52 to 59 at the lower elevations, 65 at Mercury. High temperatures 76 to 83 on the mesas, 86 to 93 at the lower elevations, 90 at Mercury.
.Saturday...Sunny. Southerly winds 10 to 25 mph. Low temperatures 47 to 54 on the mesas, 47 to 51 on the dry lakes, 53 to 60 at the lower elevations, 66 at Mercury. High temperatures 77 to 84 on the mesas, 87 to 94 at the lower elevations, 91 at Mercury.
.Sunday...Partly cloudy. Southerly winds 10 to 25 mph. Low temperatures 48 to 55 on the mesas, 49 to 53 on the dry lakes, 55 to 62 at the lower elevations, 68 at Mercury. High temperatures 77 to 84 on the mesas, 88 to 95 at the lower elevations, 92 at Mercury.
.Monday...Partly cloudy with a slight chance for rain showers and thunderstorms. Southerly winds 10 to 25 mph with gusts up to 32mph. Low temperatures 45 to 52 on the mesas, 46 to 50 on the dry lakes, 52 to 59 at the lower elevations, 65 at Mercury. High temperatures 73 to 80 on the mesas, 84 to 91 at the lower elevations, 89 at Mercury.
-End Forecast---J Callanan
Weather questions or reports should be directed to the Duty Forecaster at 5-1255.