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
1330 PST Wed Jul 16 2025
Official Sunrise Thursday 438 PST
Official Sunset Thursday 1902 PST
Forecaster: J Wood
.Forecast Summary...Limited monsoon moisture has made it as far north as Clark County this afternoon where a few high based showers have developed. It will continue to head northwest tonight and overspread the site through Friday. This will lead to increasing chances for thunderstorms. Initially, the main threats will be lightning and locally strong winds tomorrow. By Friday, storms will be capable of heavy rain. Drier air will spread in from the west this weekend ending the chance of thunderstorms by Sunday. High temperatures will be seasonably hot today then cool to below normal on Friday. Looking ahead to next week, monsoon moisture may make a return mid-week.
---For The Nevada National Security Site---
.Tonight...Partly cloudy. Evening southwest winds 10 to 25 mph becoming variable 5 to 15 mph overnight. Low temperatures 60 to 68 on the mesas, 65 to 70 on the dry lakes, 71 to 79 at the lower elevations, 77 in Mercury.
.Thursday...Partly cloudy with isolated afternoon thunderstorms. Variable winds to 10 mph in the morning becoming southeast 10 to 25 mph in the afternoon. Higher gusts near thunderstorms. High temperatures 78 to 85 on the mesas, 91 to 99 at the lower elevations, 94 in Mercury.
.Thursday Night...Partly cloudy with a slight chance of thunderstorms. Evening southwest winds 10 to 25 mph becoming variable 5 to 15 mph overnight. Low temperatures 58 to 65 on the mesas, 65 to 70 on the dry lakes, 68 to 75 at the lower elevations, 74 in Mercury.
.Friday...Mostly cloudy with widely scattered thunderstorms. Southeast winds 10 to 25 mph. Higher gusts near thunderstorms. High temperatures 75 to 83 on the mesas, 90 to 97 at the lower elevations, 92 in Mercury.
.Saturday...Partly cloudy with isolated afternoon thunderstorms. Southwest winds 10 to 25 mph. Low temperatures 58 to 65 on the mesas, 62 to 69 on the dry lakes, 70 to 77 at the lower elevations, 75 in Mercury. High temperatures 80 to 87 on the mesas, 93 to 101 at the lower elevations, 96 in Mercury.
.Sunday...Partly cloudy. Southwest winds 10 to 25 mph. Low temperatures 58 to 65 on the mesas, 62 to 69 on the dry lakes, 70 to 77 at the lower elevations, 76 in Mercury. High temperatures 82 to 88 on the mesas, 94 to 102 at the lower elevations, 98 in Mercury.
.Monday...Mostly sunny. Southwest winds 10 to 25 mph. Low temperatures 60 to 67 on the mesas, 62 to 69 on the dry lakes, 71 to 79 at the lower elevations, 79 in Mercury. High temperatures 84 to 91 on the mesas, 98 to 105 at the lower elevations, 100 in Mercury.
.Tuesday...Partly cloudy with a slight chance of thunderstorms. South winds 10 to 25 mph. Low temperatures 60 to 67 on the mesas, 65 to 70 on the dry lakes, 71 to 79 at the lower elevations, 78 in Mercury. High temperatures 80 to 88 on the mesas, 95 to 102 at the lower elevations, 97 in 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
1330 PST Wed Jul 16 2025
Official Sunrise Thursday 438 PST
Official Sunset Thursday 1902 PST
Forecaster: J Wood
NNSS Forecast Weather Threat Matrix
Thu 7/17
Fri 7/18
Sat 7/19
Sun 7/20
Mon 7/21
Tue 7/22
Thunderstorms.
Thunderstorms.
Thunderstorms.
Heat.
Heat.
Thunderstorms.
Threat/Impacts Legend
None/Low
Minor
Moderate
Major
.Forecast Summary...Limited monsoon moisture has made it as far north as Clark County this afternoon where a few high based showers have developed. It will continue to head northwest tonight and overspread the site through Friday. This will lead to increasing chances for thunderstorms. Initially, the main threats will be lightning and locally strong winds tomorrow. By Friday, storms will be capable of heavy rain. Drier air will spread in from the west this weekend ending the chance of thunderstorms by Sunday. High temperatures will be seasonably hot today then cool to below normal on Friday. Looking ahead to next week, monsoon moisture may make a return mid-week.
---For The Nevada National Security Site---
.Tonight...Partly cloudy. Evening southwest winds 10 to 25 mph becoming variable 5 to 15 mph overnight. Low temperatures 60 to 68 on the mesas, 65 to 70 on the dry lakes, 71 to 79 at the lower elevations, 77 in Mercury.
.Thursday...Partly cloudy with isolated afternoon thunderstorms. Variable winds to 10 mph in the morning becoming southeast 10 to 25 mph in the afternoon. Higher gusts near thunderstorms. High temperatures 78 to 85 on the mesas, 91 to 99 at the lower elevations, 94 in Mercury.
.Thursday Night...Partly cloudy with a slight chance of thunderstorms. Evening southwest winds 10 to 25 mph becoming variable 5 to 15 mph overnight. Low temperatures 58 to 65 on the mesas, 65 to 70 on the dry lakes, 68 to 75 at the lower elevations, 74 in Mercury.
.Friday...Mostly cloudy with widely scattered thunderstorms. Southeast winds 10 to 25 mph. Higher gusts near thunderstorms. High temperatures 75 to 83 on the mesas, 90 to 97 at the lower elevations, 92 in Mercury.
.Saturday...Partly cloudy with isolated afternoon thunderstorms. Southwest winds 10 to 25 mph. Low temperatures 58 to 65 on the mesas, 62 to 69 on the dry lakes, 70 to 77 at the lower elevations, 75 in Mercury. High temperatures 80 to 87 on the mesas, 93 to 101 at the lower elevations, 96 in Mercury.
.Sunday...Partly cloudy. Southwest winds 10 to 25 mph. Low temperatures 58 to 65 on the mesas, 62 to 69 on the dry lakes, 70 to 77 at the lower elevations, 76 in Mercury. High temperatures 82 to 88 on the mesas, 94 to 102 at the lower elevations, 98 in Mercury.
.Monday...Mostly sunny. Southwest winds 10 to 25 mph. Low temperatures 60 to 67 on the mesas, 62 to 69 on the dry lakes, 71 to 79 at the lower elevations, 79 in Mercury. High temperatures 84 to 91 on the mesas, 98 to 105 at the lower elevations, 100 in Mercury.
.Tuesday...Partly cloudy with a slight chance of thunderstorms. South winds 10 to 25 mph. Low temperatures 60 to 67 on the mesas, 65 to 70 on the dry lakes, 71 to 79 at the lower elevations, 78 in Mercury. High temperatures 80 to 88 on the mesas, 95 to 102 at the lower elevations, 97 in Mercury.
-End Forecast---J Wood
Weather questions or reports should be directed to the Duty Forecaster at 5-1255.