Area Forecast Discussion
Issued by NWS Las Vegas, NV
Issued by NWS Las Vegas, NV
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528 FXUS65 KVEF 171014 AFDVEF Area Forecast Discussion National Weather Service Las Vegas NV 314 AM PDT Mon Aug 17 2026 .KEY MESSAGES... * Temperatures will peak on Wednesday and Thursday, with above- normal afternoon highs and near-record morning lows. * Monsoon moisture increases late-week into the weekend, returning chances of showers and thunderstorms to the region. && .DISCUSSION...Today through Sunday. The region is drying out this week as a ridge of high pressure builds over the Desert Southwest. That said, some moisture still remains over the region today, so expect partly cloudy skies this afternoon across the Mojave Desert and southern Great Basin. A few of these clouds may (0 to 10 percent chance) build into light showers, with a very slight (0 to 5 percent) chance of a lightning strike. Otherwise, temperatures will peak on Wednesday and Thursday as afternoon highs climb to 5 to 7 degrees above-normal and overnight/morning lows approach daily records. Though these afternoon temperatures are not incredibly impressive by August standards, many locations will experience overnight lows in the upper 80s to low 90s. This type of heat exhausts both people and infrastructure that rely on sufficient overnight cooling. Particularly vulnerable populations include those without functioning air conditioning, those working outdoors, and those who are unhoused. Moisture will return to the region late-week, which will initially make the heat feel more oppressive before heights fall and temperatures decrease over the weekend. Late-week into the weekend, a Pacific trough will push the aforementioned area of high pressure eastward, which will return the funnel of monsoonal moisture from northern Mexico into the Desert Southwest. The extent to which the high pressure pushes east will impact timing and placement of precipitation chances, so stay tuned to the forecast if you have weekend outdoor plans. && .AVIATION...For Harry Reid...For the 06Z Forecast Package...Winds will follow typical daily directional patterns with speeds of less than 10 knots throughout the forecast period. FEW to SCT mid and high clouds remain in the area with bases at or above 10kft. Temperatures increase to 100 degrees or greater between 19Z Monday morning and 04Z in the evening. For the rest of southern Nevada, northwest Arizona and southeast California...For the 06Z Forecast Package...Winds follow typical daily directional patterns with speeds of less than 10 knots for most terminals over the next 24 hours. Exceptions include KBIH where gusty southeasterly winds pick up in the afternoon, and KDAG where gusty westerly winds persist tonight and return tomorrow evening. FEW to SCT mid and high clouds remain in the area, with bases at or above 10kft. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ DISCUSSION...Soulat AVIATION...Meltzer For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter