Will a tropical storm affect Las Vegas this week?
Summary
Tropical Storm Mario, developing off Mexico’s Pacific coast, could push moisture into the Desert Southwest later this week, increasing the chances of showers and thunderstorms across the Las Vegas Valley. The National Weather Service notes rainfall totals remain highly uncertain. Temperatures are expected to stay in the high 80s to mid 90s early in the week, with a slight uptick in rain chances by Thursday and Friday.
Key Points
- Mario is a tropical storm off the western Mexican coast; its moisture may reach the Desert Southwest late in the week.
- The National Weather Service warns of increased chances of showers and thunderstorms, but rainfall amounts are uncertain at this stage.
- Las Vegas has had a very dry monsoon season so far — the fourth-driest on record at the airport.
- Forecast highlights: mid to high 90s early in the week; Thursday and Friday show about a 30% chance of rain with highs near the low 90s.
- Past tropical remnants (for example Hurricane Hilary in 2023) produced significant local flooding, so any incoming moisture is monitored closely.
Content summary
The National Weather Service posted that moisture from Tropical Storm Mario will likely move into the Desert Southwest late in the week, raising the probability of showers and thunderstorms in Las Vegas. Mario has fluctuated between tropical storm and tropical depression status in recent days. Meteorologists caution that exact rainfall totals are unpredictable right now. So far in 2025 the airport has recorded only 2.05 inches of rain, making this the fourth-driest monsoon season on record. Short-range forecasts show highs in the 90s with roughly a 30% chance of rain on Thursday and Friday.
Context and relevance
Even modest tropical moisture can generate strong thunderstorms and flash flooding in desert terrain, so a shift in Mario’s track or strength could matter locally. This is relevant for residents, event planners and anyone with outdoor plans late this week — and it ties into a broader pattern of an unusually dry 2025 monsoon season for Southern Nevada.
Why should I read this?
Quick and casual: if you’ve got outdoor plans, travel or events later this week, it’s worth keeping an eye on the forecast. It probably won’t be a washout, but Mario could bring a few wet surprises — and we’ve skimmed the key bits so you don’t have to stare at weather maps all day.
Author style
Punchy: short, direct and focused. This is a watch — not yet a warning — but if the storm track tightens the detail will matter more.
