310 FXUS65 KVEF 081145 AFDVEF Area Forecast Discussion National Weather Service Las Vegas NV 445 AM PDT Tue Jul 8 2025 .KEY MESSAGES... * Dry conditions and strong winds will result in critical fire weather conditions across portions of southern Nevada today and tomorrow. * Temperatures across the region will continue to increase each day through mid-week as high pressure builds over the area. An Extreme Heat Warning is in effect for southern Mohave County and the Colorado River Valley on Wednesday as temperatures peak in the eastern portions of our forecast area. && .DISCUSSION...through this weekend. The combination of dry fuels, low humidity, and breezy southerly- to-southwesterly winds will result in critical fire weather conditions across portions of southern Nevada today and tomorrow. A Red Flag Warning is in effect for Nye and Esmeralda counties today and a Fire Weather Watch is in effect for portions of Lincoln County tomorrow. For more details, see the FIRE WEATHER section below. Temperatures will continue to increase as a high pressure ridge builds over the area. By tomorrow, southern Mohave County and the Colorado River Valley will see widespread Major (Level 3 of 4) HeatRisk. As such, the Extreme Heat Watch has been upgraded to an Extreme Heat Warning. A shortwave trough will swing through the Great Basin on Wednesday, which will result in temperatures cooling a slightly from Wednesday to Thursday. In response to the shortwave moving though to our north, we will see the ridge axis shift over the western half of our forecast area on Thursday. This will allow for temperatures across our western zones to increase as we head into the weekend. Meanwhile, our far southeastern zones will see temperatures "cool" back down to near normal as we head into the weekend before heating back up as we head into next week. && .AVIATION...For Harry Reid...For the 12Z Forecast Package...Light winds this morning will gradually veer to the southeast by late morning, and to the south- southwest by early afternoon through the end of the period. Gusts to around 18-20KT are expected during the afternoon and early evening, diminishing thereafter. VFR conditions will prevail with passing mid and high clouds this afternoon and tonight, and temperatures expected to exceed 100F between 19Z-04Z, peaking at 107 around 01Z. For the rest of southern Nevada, northwest Arizona and southeast California...For the 12Z Forecast Package...Light winds will shift to the south and southwest, with gusts to 15-25KT expected, though winds across the Western Mojave will maintain more of a westerly direction through the forecast period. Gusts will not be as prevalent across the Lower Colorado River Valley, though intermittent gusts to 10-15KT are possible during the afternoon. VFR conditions will prevail with mid and high clouds this afternoon onward. && .FIRE WEATHER...15 to 25 mph southerly-to-southwesterly winds with gusts to 30 mph will pick up across Nye and Esmeralda counties this afternoon as we continue to find our selves sandwiched between low pressure to our west and high pressure building in from the east. These winds combined with afternoon relative humidities less than 15% and dry fuels will result in critical fire weather conditions for Nye and Esmeralda counties this afternoon. As such, a Red Flag Warning is in effect for the aforementioned areas from 11:00 am PDT to 8:00 pm PDT today. Dry conditions will continue with winds shifting into Lincoln County on Wednesday. Low humidity combined with 15 to 20 mph southwesterly winds gusting up to 30 mph will result in elevated fire weather danger across NV fire weather zone 460 on Wednesday. As such, a Fire Weather Watch has been issued for this zone on Wednesday. Recreation with sparks and outdoor burning is not recommended as any fires that start will develop and spread quickly. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ DISCUSSION...Stessman AVIATION...Phillipson For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter