403
FXUS65 KREV 171935
AFDREV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
1235 PM PDT THU SEP 17 2026
KEY MESSAGES
* LIGHT RAIN WITH A LOW CHANCE OF AFTERNOON THUNDERSTORMS PERSISTS
NEAR THE OREGON BORDER TODAY. DRY AND BREEZY ELSEWHERE.
* SMOKE MAY LEAD TO PERIODS OF DEGRADED AIR QUALITY ACROSS THE
RENO AREA, TAHOE BASIN, AND EASTERN SIERRA TODAY AND FRIDAY.
* WARM AND DRY WEATHER PREVAILS FRIDAY INTO THE WEEKEND. RAIN AND
THUNDERSTORM CHANCES MAY RETURN TO THE SIERRA SOUTH OF TAHOE
EARLY NEXT WEEK.
DISCUSSION
* THE UPPER LOW SWINGS THROUGH THE AREA THIS AFTERNOON, BRINGING A
15-30% CHANCE FOR SHOWERS AND A 15% CHANCE FOR THUNDERSTORMS IN
LASSEN COUNTY, NORTHERN WASHOE COUNTY, AS WELL AS THE SURPRISE
VALLEY. THESE STORMS ARE CAPABLE OF GUSTS TO 40 MPH, INFREQUENT
LIGHTNING, AND VERY LIGHT PRECIPITATION AMOUNTS. WINDS ARE
LIGHTER TODAY, WITH TYPICAL WESTERLY WINDS THIS AFTERNOON AND
EVENING WITH GUSTS OF 20-25 MPH. WITH THE LOW PRESSURE
OVERHEAD, CURRENT TEMPERATURES ARE AROUND 5-10 DEGREES COOLER
COMPARED TO THIS TIME YESTERDAY. HIGH TEMPERATURES WILL END UP
AROUND 10 DEGREES BELOW AVERAGE FOR MID-SEPTEMBER.
* AREAS OF SMOKE AND HAZE FROM THE FLORISTON FIRE WEST OF RENO IS
STILL FORECAST TO FILTER INTO THE GREATER TAHOE/RENO AREA THIS
EVENING. ALSO, THE DOME FIRE LOCATED IN YOSEMITE NATIONAL PARK
IS FORECASTED TO SEND SMOKE INTO MONO AND MINERAL COUNTIES. THIS
SMOKE MAY IMPACT AIR QUALITY. VISIT FIRE.AIRNOW.GOV FOR MORE
INFORMATION ON AIR QUALITY.
* FOR FRIDAY, THE AFOREMENTIONED UPPER LOW WILL CONTINUE TO TRACK
INTO THE NORTHERN ROCKIES. A WEAK, DRY COLD FRONT IS STILL ON
TRACK TO MOVE THROUGH THE AREA ON FRIDAY. WE'LL MAINTAIN
TEMPERATURES THAT ARE AROUND 10 DEGREES BELOW NORMAL WITH LIGHT
EAST TO NORTHEAST WINDS. A RIDGE WILL QUICKLY MOVE THROUGH THE
AREA THIS WEEKEND. THIS WILL ALLOW FOR TEMPERATURES TO INCREASE
AROUND 5 DEGREES ON SATURDAY, AND ANOTHER FEW DEGREES HIGHER ON
SUNDAY. FOR MONDAY AND TUESDAY, ANOTHER WEAK UPPER LOW WILL
QUICKLY MOVE THROUGH THE REGION. THIS FEATURE IS ALSO DRY, AND
MUCH OF THE DISTRICT MAY NOT SEE MUCH PRECIPITATION. BUT,
OROGRAPHICS WITH ENOUGH UPPER LEVEL LIFT WILL GIVE A 15% CHANCE
OF RAIN SHOWERS IN THE EASTERN SIERRA MOSTLY SOUTH OF LAKE
TAHOE. CURRENTLY, THE ENSEMBLES ARE SHOWING A CONSIDERABLE
AMOUNT OF UNCERTAINTY FOR DAYS 4 TO 7. FOR NOW, TEMPERATURES
WILL TREND TOWARD CLIMATOLOGY, AND PRECIPITATION CHANCES ARE LOW.
-MCKELLAR
AVIATION
* LIGHT MORNING WINDS WILL BECOME W/SW SUSTAINED 10-15 KTS WITH
GUSTS OF 20-25 KTS FROM 19Z TO AROUND 03Z.
* SMOKE FROM THE FLORISTON FIRE MAY REDUCE VISIBILITIES AT KRNO
THIS AFTERNOON, BUT TO WHAT EXTENT IS DEPENDENT ON FIRE
ACTIVITY. A WIND SHIFT MAY REDIRECT SMOKE IMPACTS/VIS REDUCTIONS
AWAY FROM KRNO AND TOWARD KTRK-KTVL ON FRIDAY.
* SMOKE FROM THE DOME FIRE MAY ALSO REDUCE VISIBILITIES AT KMMH
THIS AFTERNOON.
-MCKELLAR
REV WATCHES/WARNINGS/ADVISORIES
NV...NONE.
CA...NONE.
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