Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Reno, NV
Issued by NWS Reno, NV
657
FNUS55 KREV 211918
FWFREV
Fire Weather Planning Forecast
National Weather Service Reno NV
1218 PM PDT Fri Aug 21 2026
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM PDT SATURDAY FOR
GUSTY WINDS AND LOW HUMIDITY...
.DISCUSSION...
Warm and dry with poor overnight recoveries on the mid-slopes and
ridges through the weekend. Plan on typical west winds in the
afternoon with gusts up to 25 mph today. Winds increase on Saturday
afternoon, with gusts of 35 to 40 mph for northwest NV and northeast CA.
Other areas in western Nevada and Mono County on Saturday may see
wind gusts of 25-30 mph, with localized elevated fire weather
conditions. Showers and isolated thunderstorms return today through
the weekend across the eastern Sierra and western NV, mostly along
and south of US-50.
Note: Thunderstorms imply gusty and erratic winds.
Note: Mixing Heights are in feet above ground level of the valley floors.
Note: Please see operating plan for detailed zone descriptions
https://www.weather.gov/wrh/fire?wfo=rev
NVZ420-221430-
Northern Sierra Front including Carson City, Douglas, Storey,
Southern Washoe, Western Lyon, and Far Southern Lassen Counties-
1218 PM PDT Fri Aug 21 2026
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM PDT SATURDAY FOR
GUSTY WINDS AND LOW HUMIDITY...
.TONIGHT...
* Sky/Weather........Mostly cloudy.
* Chance of Thunder..0%.
* Chc Wetting Rain...5%.
* Min Temperature....
* Valleys..........54-64.
* Mid Slope........58-68.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........45-55%.
* Mid Slope........34-44%.
* 24 hr trend......9% wetter.
* 20-Foot Winds......
* Valleys/Slope....West winds 9 to 14 mph with gusts to 25 mph in
the evening becoming downslope 2 to 5 mph.
* Ridge Top........Southwest winds 10 to 15 mph with gusts to 25
mph.
* Mixing Height......5100-6100 ft agl in the evening then 200-500
ft agl.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Excellent decreasing to poor after midnight.
.SATURDAY...
* Sky/Weather........Partly cloudy then becoming sunny. Slight
chance of thunderstorms in the afternoon.
* Chance of Thunder..10%.
* Chc Wetting Rain...5%.
* Max Temperature....
* Valleys..........84-94.
* Mid Slope........81-91.
* 24 hr trend......Little change.
* Min Humidity.......
* Valleys..........11-21%.
* Mid Slope........18-28%.
* 24 hr trend......4% wetter.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 13 to 20
mph with gusts to 30 mph.
* Ridge Top........Southwest winds 10 to 20 mph with gusts to 35
mph.
* Mixing Height......2200-3200 ft agl increasing to 7700-8700 ft
agl in the afternoon.
* Transport Winds....Light winds becoming southwest 15 to 25 mph in
the afternoon.
* Ventilation........Very good increasing to excellent in the
afternoon.
.SATURDAY NIGHT...
* Sky/Weather........Clear.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Min Temperature....
* Valleys..........49-59.
* Mid Slope........54-64.
* Max Humidity.......
* Valleys..........47-57%.
* Mid Slope........35-45%.
* 20-Foot Winds......
* Valleys/Slope....Southwest winds 12 to 18 mph with gusts to 30
mph becoming downslope 2 to 5 mph.
* Ridge Top........West winds 10 to 20 mph with gusts to 35 mph.
* Mixing Height......4400-5400 ft agl in the evening then 200-500
ft agl.
* Transport Winds....West 15 to 20 mph in the evening becoming
light.
* Ventilation........Excellent decreasing to poor after midnight.
.SUNDAY...
* Sky/Weather........Mostly sunny. Slight chance of showers in the
afternoon.
* Chance of Thunder..0%.
* Chc Wetting Rain...5%.
* Max Temperature....
* Valleys..........83-93.
* Mid Slope........81-91.
* Min Humidity.......
* Valleys..........10-20%.
* Mid Slope........17-27%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 7 to 12
mph with gusts to 20 mph late in the
afternoon.
* Ridge Top........Southwest winds 10 to 15 mph with gusts to 25
mph.
* Mixing Height......200-500 ft agl then 6700-7700 ft agl in the
afternoon.
* Transport Winds....Light winds becoming southwest 10 to 15 mph in
the afternoon.
* Ventilation........Poor increasing to excellent in the afternoon.
.Extended...
.SUNDAY NIGHT...Partly cloudy. Lows 51-61. West winds 9 to 14 mph in
the evening becoming downslope 2 to 5 mph.
.MONDAY THROUGH TUESDAY...Partly cloudy. Highs 84-94. Lows 49-59.
Southwest winds 10 to 15 mph.
.WEDNESDAY...Clear. Highs 83-93. Lows 46-56. Southwest winds 10 to
15 mph.
.THURSDAY THROUGH FRIDAY...Clear. Highs 82-92. Lows 46-56.
$$
NVZ421-221430-
Southern Sierra Front including Alpine, Northern Mono, Southern
Lyon, and Western Mineral Counties-
1218 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather........Mostly cloudy then becoming partly cloudy.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Min Temperature....
* Valleys..........49-59.
* Mid Slope........60-70.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........46-56%.
* Mid Slope........32-42%.
* 24 hr trend......9% wetter.
* 20-Foot Winds......
* Valleys/Slope....Southwest winds 9 to 14 mph with gusts to 25 mph
until early morning becoming downslope 2 to 5
mph.
* Ridge Top........Southwest winds 15 to 25 mph with gusts to 35
mph.
* Mixing Height......5200-6200 ft agl decreasing to 600 ft agl
after midnight.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Excellent decreasing to poor after midnight.
.SATURDAY...
* Sky/Weather........Partly cloudy. Slight chance of thunderstorms
in the afternoon.
* Chance of Thunder..20%.
* Chc Wetting Rain...10%.
* Max Temperature....
* Valleys..........82-92.
* Mid Slope........75-85.
* 24 hr trend......Little change.
* Min Humidity.......
* Valleys..........20-30%.
* Mid Slope........20-30%.
* 24 hr trend......6% wetter.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 9 to 14
mph with gusts to 30 mph in the late morning
and afternoon.
* Ridge Top........Southwest winds 10 to 20 mph with gusts to 35
mph.
* Mixing Height......2500-3500 ft agl increasing to 8800-9800 ft
agl in the afternoon.
* Transport Winds....South 10 to 15 mph shifting to the southwest
15 to 25 mph in the afternoon.
* Ventilation........Very good increasing to excellent in the
afternoon.
.SATURDAY NIGHT...
* Sky/Weather........Clear.
* Chance of Thunder..0%.
* Chc Wetting Rain...5%.
* Min Temperature....
* Valleys..........45-55.
* Mid Slope........56-66.
* Max Humidity.......
* Valleys..........54-64%.
* Mid Slope........39-49%.
* 20-Foot Winds......
* Valleys/Slope....Southwest winds 9 to 14 mph with gusts to 30 mph
in the evening becoming downslope 2 to 5 mph.
* Ridge Top........Southwest winds 15 to 25 mph. Gusts to 40 mph
increasing to 45 mph after midnight.
* Mixing Height......4700-5700 ft agl decreasing to 600 ft agl
after midnight.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Excellent decreasing to poor after midnight.
.SUNDAY...
* Sky/Weather........Sunny then becoming partly cloudy. Slight
chance of showers in the afternoon.
* Chance of Thunder..0%.
* Chc Wetting Rain...5%.
* Max Temperature....
* Valleys..........82-92.
* Mid Slope........76-86.
* Min Humidity.......
* Valleys..........16-26%.
* Mid Slope........17-27%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 7 to 12
mph with gusts to 25 mph late in the
afternoon.
* Ridge Top........Southwest winds 10 to 15 mph with gusts to 30
mph.
* Mixing Height......600-1000 ft agl increasing to 8700-9700 ft agl
in the afternoon.
* Transport Winds....Light winds becoming southwest 10 to 15 mph in
the afternoon.
* Ventilation........Marginal increasing to excellent in the
afternoon.
.Extended...
.SUNDAY NIGHT...Partly cloudy. Lows 47-57. West winds 8 to 13 mph in
the evening becoming downslope 2 to 5 mph.
.MONDAY...Partly cloudy. Highs 82-92. Lows 46-56. Southwest winds
10 to 15 mph.
.TUESDAY THROUGH WEDNESDAY...Clear. Highs 82-92. Lows 43-53.
Southwest winds 10 to 15 mph.
.THURSDAY THROUGH FRIDAY...Clear. Highs 81-91. Lows 43-53.
$$
CAZ272-221430-
Greater Lake Tahoe and Truckee Area-
1218 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather........Mostly cloudy.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Min Temperature....
* Valleys..........48-58.
* Mid Slope........53-63.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........64-74%.
* Mid Slope........42-52%.
* 24 hr trend......9% wetter.
* 20-Foot Winds......
* Valleys/Slope....Southwest winds 7 to 12 mph with gusts to 20 mph
in the evening becoming downslope 2 to 5 mph.
* Ridge Top........Southwest winds 10 to 20 mph with gusts to 40
mph.
* Mixing Height......2600-3600 ft agl decreasing to 600 ft agl
after midnight.
* Transport Winds....Southwest 15 to 25 mph decreasing to 10 to 15
mph after midnight.
* Ventilation........Excellent decreasing to poor after midnight.
.SATURDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Max Temperature....
* Valleys..........72-82.
* Mid Slope........70-80.
* 24 hr trend......Little change.
* Min Humidity.......
* Valleys..........25-35%.
* Mid Slope........27-37%.
* 24 hr trend......4% wetter.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 9 to 14
mph with gusts to 30 mph in the late morning
and afternoon.
* Ridge Top........Southwest winds 10 to 20 mph with gusts to 40
mph.
* Mixing Height......2100-3100 ft agl increasing to 5600-6600 ft
agl in the afternoon.
* Transport Winds....Southwest 15 to 25 mph.
* Ventilation........Very good increasing to excellent in the
afternoon.
.SATURDAY NIGHT...
* Sky/Weather........Clear.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Min Temperature....
* Valleys..........45-55.
* Mid Slope........49-59.
* Max Humidity.......
* Valleys..........72-82%.
* Mid Slope........45-55%.
* 20-Foot Winds......
* Valleys/Slope....Southwest winds 9 to 14 mph with gusts to 25 mph
in the evening becoming downslope 2 to 5 mph.
* Ridge Top........Southwest winds 10 to 20 mph with gusts to 40
mph increasing to 20 to 30 mph with gusts to
45 mph after midnight.
* Mixing Height......2900-3900 ft agl in the evening then 200-500
ft agl.
* Transport Winds....Southwest 15 to 25 mph in the evening becoming
light.
* Ventilation........Excellent decreasing to poor after midnight.
.SUNDAY...
* Sky/Weather........Partly cloudy then becoming sunny.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Max Temperature....
* Valleys..........72-82.
* Mid Slope........70-80.
* Min Humidity.......
* Valleys..........24-34%.
* Mid Slope........25-35%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 7 to 12
mph with gusts to 20 mph late in the
afternoon.
* Ridge Top........Southwest winds 15 to 25 mph with gusts to 35
mph.
* Mixing Height......700 ft agl increasing to 6300-7300 ft agl in
the afternoon.
* Transport Winds....Light winds becoming southwest 15 to 20 mph in
the afternoon.
* Ventilation........Poor increasing to excellent in the afternoon.
.Extended...
.SUNDAY NIGHT...Partly cloudy. Lows 46-56. Southwest winds 7 to
12 mph in the evening becoming downslope 2 to 5 mph.
.MONDAY THROUGH WEDNESDAY...Partly cloudy. Highs 72-82. Lows 41-51.
Slope winds.
.THURSDAY THROUGH FRIDAY...Clear. Highs 71-81. Lows 41-51.
$$
NVZ423-221430-
West Humboldt Basin in Pershing County-
1218 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather........Mostly cloudy.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Min Temperature....
* Valleys..........61-70.
* Mid Slope........63-71.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........32-42%.
* Mid Slope........27-37%.
* 24 hr trend......8% wetter.
* 20-Foot Winds......
* Valleys/Slope....Downslope 2 to 5 mph.
* Ridge Top........Light winds. Gusts to 20 mph in the evening.
* Mixing Height......5000-6000 ft agl in the evening then 200-500
ft agl.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Excellent decreasing to poor after midnight.
.SATURDAY...
* Sky/Weather........Partly cloudy then becoming sunny.
* Chance of Thunder..0%.
* Chc Wetting Rain...5%.
* Max Temperature....
* Valleys..........91-97.
* Mid Slope........86-96.
* 24 hr trend......Little change.
* Min Humidity.......
* Valleys..........15-20%.
* Mid Slope........16-22%.
* 24 hr trend......4% wetter.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 9 to 17
mph with gusts to 25 mph in the afternoon.
* Ridge Top........Southwest winds 10 to 20 mph.
* Mixing Height......1900-2900 ft agl increasing to 9600-10600 ft
agl in the afternoon.
* Transport Winds....Light winds becoming southwest 15 to 25 mph in
the afternoon.
* Ventilation........Good increasing to excellent in the afternoon.
.SATURDAY NIGHT...
* Sky/Weather........Partly cloudy then becoming clear. Slight
chance of showers in the evening.
* Chance of Thunder..0%.
* Chc Wetting Rain...5%.
* Min Temperature....
* Valleys..........57-67.
* Mid Slope........59-68.
* Max Humidity.......
* Valleys..........37-47%.
* Mid Slope........26-36%.
* 20-Foot Winds......
* Valleys/Slope....Southwest winds 10 to 17 mph with gusts to 25
mph becoming downslope 2 to 5 mph.
* Ridge Top........West winds 10 to 15 mph with gusts to 30 mph.
* Mixing Height......5200-6200 ft agl in the evening then 200-500
ft agl.
* Transport Winds....West 10 to 20 mph.
* Ventilation........Excellent decreasing to marginal after
midnight.
.SUNDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Max Temperature....
* Valleys..........90-96.
* Mid Slope........85-95.
* Min Humidity.......
* Valleys..........14-20%.
* Mid Slope........14-20%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 5 to 10
mph late in the afternoon.
* Ridge Top........West winds 10 to 15 mph.
* Mixing Height......200-500 ft agl then 6900-7900 ft agl in the
afternoon.
* Transport Winds....Light winds becoming southwest 10 to 15 mph in
the afternoon.
* Ventilation........Poor increasing to excellent in the afternoon.
.Extended...
.SUNDAY NIGHT...Partly cloudy in the evening then becoming mostly
cloudy. Slight chance of showers in the evening. Lows 59-69.
Southwest winds 7 to 12 mph in the evening becoming downslope 2 to
5 mph.
.MONDAY THROUGH WEDNESDAY...Partly cloudy. Highs 89-96. Lows 55-65.
West winds 8 to 13 mph.
.THURSDAY THROUGH FRIDAY...Clear. Highs 87-94. Lows 54-64.
$$
NVZ429-221430-
Lahontan Basin including Churchill and Eastern Mineral Counties-
1218 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather........Mostly cloudy.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Min Temperature....
* Valleys..........59-69.
* Mid Slope........63-73.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........38-48%.
* Mid Slope........29-39%.
* 24 hr trend......7% wetter.
* 20-Foot Winds......
* Valleys/Slope....West winds 8 to 13 mph until early morning
becoming downslope 2 to 5 mph.
* Ridge Top........West winds 10 to 15 mph.
* Mixing Height......5600-6600 ft agl in the evening then 200-500
ft agl.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Excellent decreasing to poor after midnight.
.SATURDAY...
* Sky/Weather........Partly cloudy then becoming sunny. Slight
chance of thunderstorms in the afternoon.
* Chance of Thunder..10%.
* Chc Wetting Rain...5%.
* Max Temperature....
* Valleys..........88-98.
* Mid Slope........84-94.
* 24 hr trend......Little change.
* Min Humidity.......
* Valleys..........14-24%.
* Mid Slope........15-24%.
* 24 hr trend......4% wetter.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 9 to 14
mph in the afternoon.
* Ridge Top........Southwest winds 10 to 15 mph. Gusts to 25 mph
late in the afternoon.
* Mixing Height......1900-2900 ft agl increasing to 9600-10600 ft
agl in the afternoon.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Fair increasing to excellent in the afternoon.
.SATURDAY NIGHT...
* Sky/Weather........Partly cloudy then becoming clear. Slight
chance of showers in the evening.
* Chance of Thunder..0%.
* Chc Wetting Rain...5%.
* Min Temperature....
* Valleys..........55-65.
* Mid Slope........59-69.
* Max Humidity.......
* Valleys..........48-58%.
* Mid Slope........35-45%.
* 20-Foot Winds......
* Valleys/Slope....West winds 9 to 14 mph in the evening becoming
downslope 2 to 5 mph.
* Ridge Top........Light winds becoming west 10 to 15 mph after
midnight. Gusts to 25 mph in the evening.
* Mixing Height......4900-5900 ft agl in the evening then 200-500
ft agl.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Excellent decreasing to poor after midnight.
.SUNDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Chc Wetting Rain...5%.
* Max Temperature....
* Valleys..........87-97.
* Mid Slope........83-93.
* Min Humidity.......
* Valleys..........14-24%.
* Mid Slope........16-22%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph.
* Ridge Top........West winds 10 to 15 mph.
* Mixing Height......600 ft agl increasing to 7300-8300 ft agl in
the afternoon.
* Transport Winds....Light winds.
* Ventilation........Poor increasing to excellent in the afternoon.
.Extended...
.SUNDAY NIGHT...Mostly cloudy. Slight chance of showers in the
evening. Lows 56-66. West winds 5 to 10 mph in the evening becoming
downslope 2 to 5 mph.
.MONDAY...Partly cloudy. Highs 87-97. Lows 55-65. Slope winds.
.TUESDAY...Clear. Highs 87-97. Lows 55-65. Slope winds.
.WEDNESDAY...Clear. Highs 87-97. Lows 53-63. West winds 10 to
15 mph.
.THURSDAY...Clear. Highs 86-96. Lows 53-63.
.FRIDAY...Partly cloudy. Highs 84-94.
$$
CAZ270-278-NVZ458-221430-
Surprise Valley California-Eastern Lassen County-
Northern Washoe County-
1218 PM PDT Fri Aug 21 2026
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM PDT SATURDAY FOR
GUSTY WINDS AND LOW HUMIDITY...
.TONIGHT...
* Sky/Weather........Mostly cloudy.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Min Temperature....
* Valleys..........49-59.
* Mid Slope........56-66.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........41-51%.
* Mid Slope........33-43%.
* 24 hr trend......9% wetter.
* 20-Foot Winds......
* Valleys/Slope....West winds 9 to 16 mph with gusts to 25 mph in
the evening becoming downslope 2 to 5 mph.
* Ridge Top........Southwest winds 10 to 15 mph.
* Mixing Height......5200-6200 ft agl in the evening then 200-500
ft agl.
* Transport Winds....Southwest 10 to 20 mph.
* Ventilation........Excellent decreasing to poor after midnight.
.SATURDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Max Temperature....
* Valleys..........85-95.
* Mid Slope........82-90.
* 24 hr trend......Little change.
* Min Humidity.......
* Valleys..........11-21%.
* Mid Slope........12-20%.
* 24 hr trend......Little change.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 15 to 25
mph with gusts to 35 mph.
* Ridge Top........Southwest winds 20 to 30 mph. Gusts to 40 mph.
* Mixing Height......2100-3100 ft agl increasing to 9300-10300 ft
agl in the afternoon.
* Transport Winds....Southwest 10 to 15 mph increasing to 25 to 30
mph in the afternoon.
* Ventilation........Excellent.
.SATURDAY NIGHT...
* Sky/Weather........Clear.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Min Temperature....
* Valleys..........42-52.
* Mid Slope........51-61.
* Max Humidity.......
* Valleys..........33-43%.
* Mid Slope........25-35%.
* 20-Foot Winds......
* Valleys/Slope....Southwest winds 15 to 25 mph with gusts to 35
mph becoming downslope 2 to 5 mph.
* Ridge Top........West winds 10 to 20 mph. Gusts to 40 mph.
* Mixing Height......5000-6000 ft agl in the evening then 200-500
ft agl.
* Transport Winds....Southwest 15 to 25 mph shifting to the west 10
to 15 mph after midnight.
* Ventilation........Excellent decreasing to poor after midnight.
.SUNDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Max Temperature....
* Valleys..........84-94.
* Mid Slope........81-89.
* Min Humidity.......
* Valleys..........10-20%.
* Mid Slope........10-18%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 8 to 13
mph with gusts to 25 mph late in the
afternoon.
* Ridge Top........West winds 10 to 20 mph with gusts to 30 mph.
* Mixing Height......200-500 ft agl then 6300-7300 ft agl in the
afternoon.
* Transport Winds....Light winds becoming southwest 15 to 20 mph in
the afternoon.
* Ventilation........Poor increasing to excellent in the afternoon.
.Extended...
.SUNDAY NIGHT...Partly cloudy. Lows 47-57. West winds 9 to 16 mph in
the evening becoming downslope 2 to 5 mph.
.MONDAY THROUGH TUESDAY...Partly cloudy. Highs 84-94. Lows 44-54.
Southwest winds 10 to 15 mph.
.WEDNESDAY...Clear. Highs 84-94. Lows 42-52. Southwest winds 10 to
15 mph.
.THURSDAY THROUGH FRIDAY...Clear. Highs 84-94. Lows 42-52.
$$
CAZ271-221430-
Western Lassen, Eastern Plumas, and Eastern Sierra Counties-
1218 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather........Mostly cloudy then becoming partly cloudy.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Min Temperature....
* Valleys..........41-51.
* Mid Slope........52-62.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........56-66%.
* Mid Slope........37-47%.
* 24 hr trend......12% wetter.
* 20-Foot Winds......
* Valleys/Slope....Southwest winds 9 to 14 mph with gusts to 25 mph
in the evening becoming downslope 2 to 5 mph.
* Ridge Top........South winds 10 to 15 mph with gusts to 30 mph.
* Mixing Height......3600-4600 ft agl in the evening then 200-500
ft agl.
* Transport Winds....Southwest 10 to 20 mph.
* Ventilation........Excellent decreasing to poor after midnight.
.SATURDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Max Temperature....
* Valleys..........79-89.
* Mid Slope........76-86.
* 24 hr trend......Little change.
* Min Humidity.......
* Valleys..........12-22%.
* Mid Slope........11-21%.
* 24 hr trend......Little change.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 9 to 16
mph with gusts to 30 mph in the late morning
and afternoon.
* Ridge Top........Southwest winds 10 to 20 mph with gusts to 35
mph.
* Mixing Height......2000-3000 ft agl increasing to 7200-8200 ft
agl in the afternoon.
* Transport Winds....South 10 to 15 mph increasing to southwest 20
to 30 mph in the afternoon.
* Ventilation........Very good increasing to excellent in the
afternoon.
.SATURDAY NIGHT...
* Sky/Weather........Clear then becoming partly cloudy.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Min Temperature....
* Valleys..........38-48.
* Mid Slope........50-60.
* Max Humidity.......
* Valleys..........51-61%.
* Mid Slope........29-39%.
* 20-Foot Winds......
* Valleys/Slope....Southwest winds 9 to 15 mph with gusts to 30 mph
becoming downslope 2 to 5 mph.
* Ridge Top........Southwest winds 15 to 25 mph with gusts to 35
mph.
* Mixing Height......3400-4400 ft agl in the evening then 200-500
ft agl.
* Transport Winds....Southwest 15 to 25 mph in the evening becoming
light.
* Ventilation........Excellent decreasing to poor after midnight.
.SUNDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Max Temperature....
* Valleys..........80-90.
* Mid Slope........77-87.
* Min Humidity.......
* Valleys..........12-22%.
* Mid Slope........12-22%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 8 to 13
mph with gusts to 25 mph late in the
afternoon.
* Ridge Top........Southwest winds 10 to 20 mph with gusts to 30
mph.
* Mixing Height......200-500 ft agl then 6700-7700 ft agl in the
afternoon.
* Transport Winds....Light winds becoming southwest 10 to 20 mph in
the afternoon.
* Ventilation........Poor increasing to excellent in the afternoon.
.Extended...
.SUNDAY NIGHT...Clear in the evening then becoming partly cloudy.
Lows 41-51. Southwest winds 9 to 14 mph in the evening becoming
downslope 2 to 5 mph.
.MONDAY...Clear. Highs 79-89. Lows 40-50. South winds 10 to 15 mph.
.TUESDAY...Partly cloudy. Highs 79-89. Lows 37-47. Southwest winds
10 to 15 mph.
.WEDNESDAY...Clear. Highs 79-89. Lows 36-46. Southwest winds 10 to
15 mph.
.THURSDAY THROUGH FRIDAY...Clear. Highs 79-89. Lows 36-46.
$$
CAZ274-221430-
Southern Mono County-
1218 PM PDT Fri Aug 21 2026
.TONIGHT...
* Sky/Weather........Mostly cloudy then becoming partly cloudy.
* Chance of Thunder..0%.
* Chc Wetting Rain...0%.
* Min Temperature....
* Valleys..........48-58.
* Mid Slope........50-60.
* 24 hr trend......Little change.
* Max Humidity.......
* Valleys..........55-65%.
* Mid Slope........39-49%.
* 24 hr trend......9% wetter.
* 20-Foot Winds......
* Valleys/Slope....Southwest winds 9 to 15 mph with gusts to 30 mph
becoming downslope 2 to 5 mph.
* Ridge Top........Southwest winds 10 to 15 mph with gusts to 30
mph.
* Mixing Height......4800-5800 ft agl decreasing to 600 ft agl
after midnight.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Excellent decreasing to poor after midnight.
.SATURDAY...
* Sky/Weather........Partly cloudy then becoming sunny. Slight
chance of thunderstorms in the afternoon.
* Chance of Thunder..10%.
* Chc Wetting Rain...5%.
* Max Temperature....
* Valleys..........77-87.
* Mid Slope........74-84.
* 24 hr trend......Little change.
* Min Humidity.......
* Valleys..........18-28%.
* Mid Slope........21-31%.
* 24 hr trend......4% wetter.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 9 to 16
mph with gusts to 30 mph in the afternoon.
* Ridge Top........Southwest winds 10 to 20 mph with gusts to 30
mph.
* Mixing Height......2400-3400 ft agl increasing to 9000-10000 ft
agl in the afternoon.
* Transport Winds....Southwest 10 to 20 mph.
* Ventilation........Very good increasing to excellent in the
afternoon.
.SATURDAY NIGHT...
* Sky/Weather........Clear.
* Chance of Thunder..0%.
* Chc Wetting Rain...5%.
* Min Temperature....
* Valleys..........44-54.
* Mid Slope........47-57.
* Max Humidity.......
* Valleys..........60-70%.
* Mid Slope........44-54%.
* 20-Foot Winds......
* Valleys/Slope....Southwest winds 9 to 15 mph with gusts to 30 mph
until early morning becoming downslope 2 to 5
mph.
* Ridge Top........West winds 10 to 15 mph with gusts to 30 mph.
* Mixing Height......4300-5300 ft agl decreasing to 600 ft agl
after midnight.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Excellent decreasing to poor after midnight.
.SUNDAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Chc Wetting Rain...5%.
* Max Temperature....
* Valleys..........77-87.
* Mid Slope........74-84.
* Min Humidity.......
* Valleys..........15-25%.
* Mid Slope........16-26%.
* 20-Foot Winds......
* Valleys/Slope....Upslope 4 to 8 mph becoming southwest 9 to 14
mph with gusts to 25 mph late in the
afternoon.
* Ridge Top........Southwest winds 10 to 20 mph with gusts to 30
mph.
* Mixing Height......600-1100 ft agl increasing to 8000-9000 ft agl
in the afternoon.
* Transport Winds....Light winds becoming south 10 to 15 mph in the
afternoon.
* Ventilation........Marginal increasing to excellent in the
afternoon.
.Extended...
.SUNDAY NIGHT...Partly cloudy. Lows 45-55. Southwest winds 9 to
15 mph in the evening becoming downslope 2 to 5 mph.
.MONDAY...Partly cloudy. Highs 76-86. Lows 44-54. Southwest winds
10 to 15 mph.
.TUESDAY THROUGH WEDNESDAY...Clear. Highs 77-87. Lows 43-53.
Southwest winds 10 to 15 mph.
.THURSDAY...Clear. Highs 77-87. Lows 43-53.
.FRIDAY...Partly cloudy. Highs 76-86.
$$
.8 to 14 day outlook for (Sat Aug 29 through Fri Sep 4)
Above normal temperatures and Near normal precipitation.
=
$$
http://weather.gov/reno