976 FXUS65 KREV 052020 AFDREV Area Forecast Discussion National Weather Service Reno NV 120 PM PDT Fri Jun 5 2026 .KEY MESSAGES... * Warm and dry conditions continue today, with highs above normal and areas of Moderate HeatRisk across lower valleys. * Increasing westerly breezes and low relative humidity today bring elevated fire concerns. Stronger winds and higher fire risks are expected Saturday. * Some cooling returns this weekend, with temperatures near or slightly below early June averages Sunday through much of next week. Gusty winds and shower chances may also return next week. && .DISCUSSION... Increasing westerly winds are approaching the region today, with gusts across portions of northeastern California and western Nevada of up to 30 mph today. Several area lakes will see choppy waves, while the water may seem tempting with all the recent warmth, it is advised to stay dry and find another way to cool off. With all the heat building under the ridge that got us to the mid to upper 90s across western Nevada, a Minor to Moderate HeatRisk will be present today into Saturday. Along with the warm windy conditions comes the drying of fuels due to low relative humidities, which has initiated a few hours of elevated fire weather risk for today. This set up will lead us into tomorrow's Red Flag Warning as poor overnight humidity recoveries and increasing winds arrive with an upper level trough for Saturday. With the upper jet performing its northward migration for the summer months, the main upper steering for low pressure systems will reside to our north for the foreseeable future. Tomorrow, for example, a trough will glide along the jet positioned along the Canadian border, which will bring increasing winds. Gusts tomorrow will reach 40+ mph across portions of northeastern California, into western Nevada. Blowing dust (especially over the Basin and Range) and choppy lakes are two impacts that may concern travelers and recreational interests. As mentioned above, the dry fuels, low relative humidities, and gusty winds have led to the issuance of a Red Flag Warning over much of northwestern Nevada and portions of northeastern California, details in the Fire Weather discussion section below. The gusty winds have also prompted a Lake Wind Advisory over many area lakes. Cooler air will follow this introduction of frontal passage, bringing temperatures back toward seasonal averages this weekend. Our weather theme changes into the weekend as the cooler air settles in behind the frontal passage. Then, yet another low swoops in from the Aleutian Islands and drops toward the Pacific Northwest, delivering a one-two- reinforcing shot of cooler air for early next week. Showers are accompanying this particular frontal passage for Monday, although the best chances will be along the Oregon border (30-60%) and into the northern Sierra (20-50%, better chances along higher terrain). These opportunities for showers linger, but lessen slightly into Tuesday, where the same areas summon chances of 20-40% along the Oregon border and 30-50% chances over the northern Sierra. Showers look to clear out ahead of daybreak on Wednesday, leaving behind cool northerly breezes. For Thursday, the trough position seems to hint at easterly winds kicking up some gusts along the Sierra, but details on speeds are to be determined as the forecast draws nearer. With the recent moisture deposited from the aforementioned showers, relative humidities should remain a bit higher, which lessens the concern for fire weather conditions. Friday will usher in warming temperatures under a ridge of high pressure that will advance eastward from the Pacific. HRICH && .AVIATION... VFR conditions will maintain across the region today and Saturday, however increasing westerly winds will bring gusts to 30 kts today, and up to 40+ kts for Saturday. Some areas of turbulence and LLWS can be expected for Saturday for terminals in the Tahoe Basin and along the Sierra front. Justin/HRICH && .FIRE WEATHER... Elevated to brief periods of near critical conditions are expected today, where westerly gusts of 30-40 mph and low relative humidities with poor recoveries overlap receptive fuels over western NV and portions of northeastern California. Saturday remains the primary concern as the strongest winds arrive after several days of warming and drying. Westerly gusts over 40 mph are likely across much of western NV and portions of northeastern CA, with minimum RH ranging 9-16% in lower valleys. Longer critical wind/RH overlap supports up to 9-10 hours of Red Flag conditions across western NV and into eastern Lassen County. A Red Flag Warning has been issued for Saturday from 11 AM to 11 PM. Ohter areas such as lower Mono County valleys, to include the Chalfant Valley will also see a couple hours of elevated fire weather conditions for Saturday. Justin/HRICH && .REV Watches/Warnings/Advisories... NV...Red Flag Warning from 11 AM to 11 PM PDT Saturday NVZ420-423-429- 458. Lake Wind Advisory from 11 AM to 11 PM PDT Saturday NVZ001-004. Lake Wind Advisory from 8 AM to 11 PM PDT Saturday NVZ003. CA...Red Flag Warning from 11 AM to 11 PM PDT Saturday CAZ278. Lake Wind Advisory from 11 AM to 11 PM PDT Saturday CAZ073. && $$