Weather:
A monsoon tempest compartment emits lightning implicit the confederate portion of the Las Vegas vale Friday, July 20, 2018. The National Weather Service's Las Vegas bureau issued its play upwind outlook Monday, July 13, 2026, noting that monsoon moisture volition stay entrenched crossed the portion passim this week. Photo by: Sam Morris/Las Vegas News Bureau
By Las Vegas Sun Staff (contact)
Monday, July 13, 2026 | 9:30 a.m.
Las Vegas and the portion are entering an progressive agelong of monsoon upwind this week, with regular thunderstorm chances forecast done Sunday and the imaginable for localized flash flooding, unsafe lightning and gusty winds, forecasters say.
The National Weather Service Las Vegas bureau issued its play upwind outlook Monday, noting that monsoon moisture volition stay entrenched crossed the portion passim this week, bringing what pb forecaster Chris Outler described arsenic adaptable but persistent tempest activity.
“Monsoon moisture volition stay successful spot done the week, bringing regular chances of showers and thunderstorms,” Outler said. “Thunderstorms could nutrient localized areas of flash flooding on with beardown gusty winds and unsafe lightning.”
The upwind service’s hazard outlook shows thunderstorm imaginable crossed Clark, Lincoln, Nye and Esmeralda counties successful Nevada, arsenic good arsenic Mohave County successful Arizona and Inyo and San Bernardino counties successful California, on with the Colorado River Valley. All transportation a “minor” hazard level, the second-lowest classification, for each time of the week.
Outler cautioned that regular hazard designations bash not mean storms volition onslaught everyplace simultaneously.
“Don’t beryllium deceived — we’re not expecting thunderstorms each time successful each location,” helium said successful the NWS play webinar. “Certain days volition beryllium busier than others, and we expect to spot regular variations successful the sum and strength of storms. Nonetheless, each time does transportation the hazard of astatine slightest isolated thunderstorm activity.”
High temperatures this week are expected to stay adjacent — and perchance somewhat supra — mean for mid-July. Las Vegas is forecast to scope 105 degrees Monday earlier climbing to 108 by Wednesday and cooling somewhat into the weekend. Desert communities specified arsenic Furnace Creek successful Death Valley volition spot highs ranging from 113 to 120 degrees done the week. Higher elevations specified arsenic Mount Charleston are expected to scope the debased to precocious 70s.
Overnight lows volition supply little alleviation than usual. Outler attributed that to the operation of accrued unreality screen and elevated humidity associated with the monsoon. Las Vegas overnight lows are projected to hover adjacent 89-93 degrees done the week — lukewarm adjacent by summertime standards.
“We’re not expecting arsenic overmuch overnight alleviation arsenic we often spot during those blistery summertime days,” Outler said.
The excessive rainfall outlook from the National Weather Service’s Weather Prediction Center shows the top flash-flooding hazard contiguous concentrated crossed the Mojave Desert and northwestern Arizona, with a marginal hazard designation — meaning astatine slightest a 5% probability of excessive rainfall starring to flooding. By Tuesday and into midweek, that hazard expands northward to see Inyo County and the Sierra region. Wednesday and Thursday amusement elevated flash-flood probabilities focused connected eastbound portions of the forecast zone.
Storms this week transportation the imaginable to nutrient dense rainfall and localized flash flooding successful usually adust washes, flood channels and low-water crossings; abrupt gusty winds exceeding 40 mph; unsafe lightning; and rapidly deteriorating boating conditions connected country lakes and rivers owed to erratic winds, lightning and enhanced waves.
Wind gusts associated with thunderstorm enactment could beryllium particularly pronounced on the Colorado River Valley, wherever the upwind work is monitoring for gusts successful the 30-40 mph scope during day and evening tempest hours.
Friday appears to transportation the highest wide probability of thunderstorm sum during the week, though isolated enactment is imaginable each day. Precipitation probabilities for the Las Vegas country scope from 20% to 45% done the week, peaking Friday.
Looking ahead, the NWS 6-10 time outlook — valid July 17-21 — calls for continued above-normal temperatures crossed overmuch of the West and a continued progressive monsoon pattern, with above-normal precipitation favored crossed the Southwest done mid-to-late July.
North American monsoon play successful Southern Nevada officially runs from June 15 done Sept. 30. Outler said earlier this summertime that the play appears connected way to beryllium much progressive than successful caller years.
“We person a batch of factors moving successful our favor, truthful we expect a small much of an progressive play than what we’ve seen implicit the past fewer years,” Outler said.
Officials passim the portion person urged residents to travel the longstanding guidance: Never thrust done flooded roadways, enactment wide of washes and detention basins during storms and stay alert adjacent connected days with lone flimsy tempest chances.
“Even if it’s lone a tiny accidental of thunderstorms — possibly a 10% oregon 20% accidental — don’t discount that arsenic meaning nothing,” Outler has said. “It could inactive happen, and it could inactive hap beauteous quickly, truthful ever beryllium prepared.”
Residents tin show conditions done wireless exigency alerts, upwind apps and the National Weather Service’s online resources astatine weather.gov/lasvegas.
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