692
FXUS65 KREV 060917
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
217 AM PDT THU AUG 6 2026
KEY MESSAGES
* A PROLONGED PERIOD OF TRIPLE-DIGIT HEAT ACROSS WESTERN NV AND
EASTERN CA VALLEYS WILL BRING US INTO THE WEEKEND.
* SMOKE AND HAZE FROM REGIONAL WILDFIRES COULD BRING PERIODS OF
REDUCED AIR QUALITY AT TIMES THROUGH THIS WEEK, ALTHOUGH SHOULD BE
LIGHTER THE NEXT COUPLE DAYS.
* DRY CONDITIONS PERSIST IN MOST AREAS, BUT LOW-END ISOLATED
AFTERNOON SHOWER AND THUNDER CHANCES MAY RETURN FRIDAY THROUGH
EARLY NEXT WEEK FOR PARTS OF THE EASTERN SIERRA AND WESTERN NV.
DISCUSSION
THESE AFTERNOONS WILL BE HOT, SO MAKE SURE TO LIMIT STRENUOUS
ACTIVITIES TO THE EARLY MORNING OR LATE EVENING HOURS, LIMITING
EXPOSURE TIME DURING THE HOTTEST HOURS OF THE DAY. IF YOUR PLANS
BRING YOU OUT INTO THE 100+ DEGREE HEAT, MAKE SURE TO TAKE FREQUENT
BREAKS IN SHADE AND/OR AIR CONDITIONING AND KEEP HYDRATED. THE MUCH
ADVERTISED HEATING TREND IS HERE TO STAY WITH US THROUGH EARLY NEXT
WEEK, AND FOR LOCATIONS ACROSS WESTERN NEVADA, WIDESPREAD MODERATE
TO MAJOR HEATRISK ALONG WITH ISOLATED POCKETS OF EXTREME HEATRISK
EMERGE FOR FRIDAY MORNING THROUGH MONDAY MORNING. THIS HAS PROMPTED
THE ISSUANCE OF AN EXTREME HEAT WARNING OVER THE WEEKEND FOR
THE BASIN AND RANGE OF WESTERN NEVADA. ELSEWHERE, HEAT ADVISORIES
STAND THROUGH MONDAY MORNING TO ACCOMMODATE FOR THE HOT DAYTIME
READINGS AND LACK OF APPRECIABLE OVERNIGHT COOLING DURING THIS
PROLONGED PERIOD.
WINDS WILL RESIDE IN THE TYPICAL SUMMERTIME ZEPHYR REGIME OF
BEHAVIORS, WITH WESTERLY AFTERNOON GUSTS OF UP TO 25 MPH ARE
POSSIBLE EACH DAY. THE SMOKE WE HAVE RECENTLY SEEN ON THE HORIZON
HAS BEEN SHOWN BY GUIDANCE TO BECOME LIGHTER OVER THE NEXT COUPLE
DAYS, BUT SMOKE FORECASTING CAN BE TRICKY BECAUSE IT IS NOT ONLY
DEPENDENT ON WINDS, BUT ALSO FIRE BEHAVIORS. GIVEN THE WIND
DIRECTION OF MOSTLY W-SW, THE LOCATION AND RECENT FIRE BEHAVIOR OF
THE GANN FIRE, WE CANNOT RULE OUT PERIODS OF HAZY SKIES UNTIL
THE FIRE IS UNDER CONTAINMENT.
WE WILL ALSO START TO SEE THE INFLUENCE FROM A REESTABLISHED
MONSOONAL MOISTURE TAP STARTING TODAY WITH CUMULUS BUILDUPS AND EVEN
A 5% CHANCE FOR SHOWERS IN SOUTHERN MONO AND MINERAL COUNTIES.
SIMILAR CHANCES ARE SLATED FOR THE SAME AREAS FOR FRIDAY. CHANCES
INCREASE TO 20-30% FOR SATURDAY OVER THE SAME AREA. THEN, SUNDAY
CHANCES NUDGE EVEN HIGHER TO 30-35% FOR THAT FAVORED MONO/MINERAL
AREA. WE CANNOT RULE OUT A SHOWER CREEPING NORTH OF US-50 FOR
SATURDAY ONWARD. THESE SHOWER CHANCES WILL STICK AROUND INTO AT
LEAST MID WEEK NEXT WEEK. HRICH
AVIATION
* W-SW GUSTS OF 20-25 KTS TODAY BETWEEN 21Z-03Z WILL BE THE MAIN
CONCERN UNDER VFR CONDITIONS. OTHER CONCERNS WILL BE LIMITED
SLANTWISE VISIBILITY DUE TO REGIONAL SMOKE FROM AREA FIRES, AS
WELL AS DENSITY ALTITUDE CONCERNS DUE TO HOT DAYTIME
TEMPERATURES. HRICH
REV WATCHES/WARNINGS/ADVISORIES
NV...HEAT ADVISORY UNTIL 8 AM PDT MONDAY NVZ001-003-005.
HEAT ADVISORY UNTIL 8 AM PDT FRIDAY NVZ004.
EXTREME HEAT WARNING FROM 8 AM FRIDAY TO 8 AM PDT MONDAY NVZ004.
CA...HEAT ADVISORY UNTIL 8 AM PDT MONDAY CAZ070-071.
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