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 May 26 2026
Official Sunrise Wednesday 428 PST
Official Sunset Wednesday 1855 PST
Forecaster: J Callanan
.Forecast Summary...A cut-off low along the California/Nevada border will bring gusty winds tonight and tomorrow. As the low pressure moves closer to the site, rain showers will become more likely. Cooler temperatures will arrive on Wednesday and Thursday. A warming trend will begin on Friday and persist into the weekend. Another bout of gusty winds is expected on Sunday as a trough moves over the site. Thunderstorm probability is elevated over the weekend for the mesa.
---For The Nevada National Security Site---
.Tonight...Partly cloudy. Southwest winds 20 to 30 mph with gusts to 48 mph becoming 5 to 15 mph tonight. Low temperatures 39 to 46 on the mesas, 42 to 49 on the dry lakes, 61 to 69 at the lower elevations, 67 at Mercury.
.Wednesday...Partly cloudy. Southwest winds 15 to 20 mph with gusts to 35 mph. Isolated rain showers over the mesas. High temperatures 54 to 61 on the mesas, 66 to 73 at the lower elevations, 70 at Mercury.
.Wednesday Night...Partly cloudy. Northeast winds 5 to 10 mph. Low temperatures 38 to 45 on the mesas, 40 to 47 on the dry lakes, 54 to 61 at the lower elevations, 60 at Mercury.
.Thursday...Mostly cloudy. Southwest winds 15 to 25 mph. Low temperatures 39 to 46 on the mesas, 41 to 48 on the dry lakes, 55 to 62 at the lower elevations, 61 at Mercury. High temperatures 55 to 62 on the mesas, 67 to 74 at the lower elevations, 71 at Mercury.
.Friday...Mostly cloudy. Southwest winds 10 to 20 mph. Isolated rain showers. Low temperatures 44 to 51 on the mesas, 44 to 51 on the dry lakes, 59 to 66 at the lower elevations, 65 at Mercury. High temperatures 62 to 69 on the mesas, 73 to 80 at the lower elevations, 76 at Mercury.
.Saturday...Partly cloudy. Southwest winds 10 to 20 mph. Slight chance for isolated thunderstorms over the Mesas. Low temperatures 49 to 56 on the mesas, 49 to 56 on the dry lakes, 63 to 70 at the lower elevations, 68 at Mercury. High temperatures 69 to 76 on the mesas, 81 to 88 at the lower elevations, 84 at Mercury.
.Sunday...Partly cloudy. Southwest winds 15 to 30 mph. Chance for isolated thunderstorms over the Mesas. Low temperatures 51 to 58 on the mesas, 51 to 58 on the dry lakes, 65 to 72 at the lower elevations, 70 at Mercury. High temperatures 73 to 80 on the mesas, 86 to 93 at the lower elevations, 89 at Mercury.
.Monday...Mostly sunny. Southwest winds 10 to 20 mph. Low temperatures 54 to 61 on the mesas, 54 to 61 on the dry lakes, 69 to 76 at the lower elevations, 74 at Mercury. High temperatures 77 to 84 on the mesas, 89 to 96 at the lower elevations, 92 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 May 26 2026
Official Sunrise Wednesday 428 PST
Official Sunset Wednesday 1855 PST
Forecaster: J Callanan
NNSS Forecast Weather Threat Matrix
Wed 5/27
Thu 5/28
Fri 5/29
Sat 5/30
Sun 5/31
Mon 6/01
Wind
None
None
Thunderstorms
Wind / Thunderstorms
None
Threat/Impacts Legend
None/Low
Minor
Moderate
Major
.Forecast Summary...A cut-off low along the California/Nevada border will bring gusty winds tonight and tomorrow. As the low pressure moves closer to the site, rain showers will become more likely. Cooler temperatures will arrive on Wednesday and Thursday. A warming trend will begin on Friday and persist into the weekend. Another bout of gusty winds is expected on Sunday as a trough moves over the site. Thunderstorm probability is elevated over the weekend for the mesa.
---For The Nevada National Security Site---
.Tonight...Partly cloudy. Southwest winds 20 to 30 mph with gusts to 48 mph becoming 5 to 15 mph tonight. Low temperatures 39 to 46 on the mesas, 42 to 49 on the dry lakes, 61 to 69 at the lower elevations, 67 at Mercury.
.Wednesday...Partly cloudy. Southwest winds 15 to 20 mph with gusts to 35 mph. Isolated rain showers over the mesas. High temperatures 54 to 61 on the mesas, 66 to 73 at the lower elevations, 70 at Mercury.
.Wednesday Night...Partly cloudy. Northeast winds 5 to 10 mph. Low temperatures 38 to 45 on the mesas, 40 to 47 on the dry lakes, 54 to 61 at the lower elevations, 60 at Mercury.
.Thursday...Mostly cloudy. Southwest winds 15 to 25 mph. Low temperatures 39 to 46 on the mesas, 41 to 48 on the dry lakes, 55 to 62 at the lower elevations, 61 at Mercury. High temperatures 55 to 62 on the mesas, 67 to 74 at the lower elevations, 71 at Mercury.
.Friday...Mostly cloudy. Southwest winds 10 to 20 mph. Isolated rain showers. Low temperatures 44 to 51 on the mesas, 44 to 51 on the dry lakes, 59 to 66 at the lower elevations, 65 at Mercury. High temperatures 62 to 69 on the mesas, 73 to 80 at the lower elevations, 76 at Mercury.
.Saturday...Partly cloudy. Southwest winds 10 to 20 mph. Slight chance for isolated thunderstorms over the Mesas. Low temperatures 49 to 56 on the mesas, 49 to 56 on the dry lakes, 63 to 70 at the lower elevations, 68 at Mercury. High temperatures 69 to 76 on the mesas, 81 to 88 at the lower elevations, 84 at Mercury.
.Sunday...Partly cloudy. Southwest winds 15 to 30 mph. Chance for isolated thunderstorms over the Mesas. Low temperatures 51 to 58 on the mesas, 51 to 58 on the dry lakes, 65 to 72 at the lower elevations, 70 at Mercury. High temperatures 73 to 80 on the mesas, 86 to 93 at the lower elevations, 89 at Mercury.
.Monday...Mostly sunny. Southwest winds 10 to 20 mph. Low temperatures 54 to 61 on the mesas, 54 to 61 on the dry lakes, 69 to 76 at the lower elevations, 74 at Mercury. High temperatures 77 to 84 on the mesas, 89 to 96 at the lower elevations, 92 at Mercury.
-End Forecast---J Callanan
Weather questions or reports should be directed to the Duty Forecaster at 5-1255.