Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Reno, NV

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971
FNUS55 KREV 221137
FWFREV

Fire Weather Planning Forecast
National Weather Service Reno NV
437 AM PDT Fri Aug 22 2025

...THUNDERSTORM CHANCES TODAY AND SATURDAY AFTERNOON WITH ISOLATED
DRY LIGHTNING STRIKES POSSIBLE...

...HEAT ADVISORIES IN EFFECT TODAY UNTIL SUNDAY MORNING...

.DISCUSSION...

Temperatures will heat up through Saturday with Heat Advisories in
effect this weekend for portions of NE CA an NW NV. Thunderstorm
chances return this afternoon mainly south of I-80, with isolated
dry lightning strikes that could lead to new fire starts. Shower and
storm coverage will increase this weekend and continue through much
of next week. There are lower chances for dry lightning with an increased
risk for heavy rain and potential flash flooding.

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

NVZ420-230100-
Northern Sierra Front including Carson City, Douglas, Storey,
Southern Washoe, Western Lyon, and Far Southern Lassen Counties-
437 AM PDT Fri Aug 22 2025

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 9 AM PDT SUNDAY...

.TODAY...
* Sky/Weather........Sunny.
* Chance of Thunder..20%.
* Max Temperature....
*   Valleys..........88-98.
*   Mid Slope........87-97.
*   24 hr trend......3 degrees warmer
* Min Humidity.......
*   Valleys..........8-18%.
*   Mid Slope........10-18%.
*   24 hr trend......Little change.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph.
*   Ridge Top........South winds 10 to 15 mph.
* Chc Wetting Rain...5%.
* Mixing Height......1400-1900 ft agl increasing to 7900-8900 ft
                     agl in the afternoon.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Fair increasing to excellent in the afternoon.

.TONIGHT...
* Sky/Weather........Mostly cloudy then becoming partly cloudy.
* Chance of Thunder..0%.
* Min Temperature....
*   Valleys..........58-68.
*   Mid Slope........61-71.
*   24 hr trend......5 degrees warmer.
* Max Humidity.......
*   Valleys..........37-47%.
*   Mid Slope........27-37%.
*   24 hr trend......6% wetter.
* 20-Foot Winds......
*   Valleys/Slope....West winds 7 to 12 mph until early morning
                     becoming downslope 2 to 5 mph.
*   Ridge Top........Southwest winds 10 to 15 mph.
* Chc Wetting Rain...5%.
* Mixing Height......5100-6100 ft agl decreasing to 600-900 ft agl
                     after midnight.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Excellent decreasing to marginal after
                     midnight.

.SATURDAY...
* Sky/Weather........Partly cloudy. Slight chance of thunderstorms
                     in the afternoon.
* Chance of Thunder..30%.
* Max Temperature....
*   Valleys..........87-97.
*   Mid Slope........85-95.
* Min Humidity.......
*   Valleys..........11-21%.
*   Mid Slope........13-23%.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph.
*   Ridge Top........Light winds.
* Chc Wetting Rain...20%.
* Mixing Height......900-1400 ft agl increasing to 6100-7100 ft agl
                     in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Marginal increasing to excellent in the
                     afternoon.


.Extended...
.SATURDAY NIGHT...Mostly cloudy. Slight chance of thunderstorms in
the evening. Chance of showers. Lows 57-67. Southwest winds 7 to
12 mph until early morning becoming downslope 2 to 5 mph.
.SUNDAY...Mostly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 82-92. Lows 55-65. Slope winds.
.MONDAY THROUGH TUESDAY...Mostly cloudy. Chance of showers and a
slight chance of thunderstorms. Highs 79-89. Lows 52-62. Slope
winds.
.WEDNESDAY THROUGH THURSDAY...Mostly cloudy. Chance of showers and a
slight chance of thunderstorms. Highs 75-85. Lows 50-60.

$$

NVZ421-230100-
Southern Sierra Front including Alpine, Northern Mono, Southern
Lyon, and Western Mineral Counties-
437 AM PDT Fri Aug 22 2025

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 9 AM PDT SATURDAY...

.TODAY...
* Sky/Weather........Sunny then becoming mostly cloudy. Slight
                     chance of thunderstorms in the afternoon.
* Chance of Thunder..20%.
* Max Temperature....
*   Valleys..........87-97.
*   Mid Slope........80-90.
*   24 hr trend......3 degrees warmer.
* Min Humidity.......
*   Valleys..........9-19%.
*   Mid Slope........10-20%.
*   24 hr trend......6% wetter.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph becoming northwest 7 to 12
                     mph in the afternoon.
*   Ridge Top........Light winds becoming southwest 10 to 15 mph in
                     the late morning and afternoon.
* Chc Wetting Rain...10%.
* Mixing Height......2300-3300 ft agl increasing to 9400-10400 ft
                     agl in the afternoon.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Good increasing to excellent in the afternoon.

.TONIGHT...
* Sky/Weather........Mostly cloudy then becoming clear. Slight
                     chance of showers in the evening.
* Chance of Thunder..0%.
* Min Temperature....
*   Valleys..........49-59.
*   Mid Slope........62-72.
*   24 hr trend......4 degrees warmer.
* Max Humidity.......
*   Valleys..........47-57%.
*   Mid Slope........32-42%.
*   24 hr trend......14% wetter.
* 20-Foot Winds......
*   Valleys/Slope....Southwest winds 8 to 13 mph until early morning
                     becoming downslope 2 to 5 mph.
*   Ridge Top........Southwest winds 10 to 15 mph.
* Chc Wetting Rain...5%.
* Mixing Height......3000-4000 ft agl decreasing to 600-900 ft agl
                     after midnight.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Excellent decreasing to marginal after
                     midnight.

.SATURDAY...
* Sky/Weather........Partly cloudy. Showers likely and a slight
                     chance of thunderstorms in the afternoon.
* Chance of Thunder..20%.
* Max Temperature....
*   Valleys..........83-93.
*   Mid Slope........76-86.
* Min Humidity.......
*   Valleys..........14-24%.
*   Mid Slope........16-26%.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph.
*   Ridge Top........Southwest winds 10 to 15 mph.
* Chc Wetting Rain...35%.
* Mixing Height......1200-1700 ft agl increasing to 3900-4900 ft
                     agl in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Marginal increasing to very good in the
                     afternoon.


.Extended...
.SATURDAY NIGHT...Mostly cloudy. Slight chance of thunderstorms in
the evening. Chance of showers. Lows 47-57. Southwest winds 7 to
12 mph until early morning becoming downslope 2 to 5 mph.
.SUNDAY...Showers likely and a slight chance of thunderstorms. Highs
80-90. Lows 46-56. Slope winds.
.MONDAY...Mostly cloudy. Chance of thunderstorms. Highs 77-87. Lows
44-54. Slope winds.
.TUESDAY...Mostly cloudy. Slight chance of thunderstorms. Highs
75-85. Lows 43-53. Slope winds.
.WEDNESDAY...Showers likely and a slight chance of thunderstorms.
Highs 73-83. Lows 40-50.
.THURSDAY...Partly cloudy. Slight chance of thunderstorms. Highs
73-83.

$$

CAZ272-230100-
Greater Lake Tahoe and Truckee Area-
437 AM PDT Fri Aug 22 2025

.TODAY...
* Sky/Weather........Sunny then becoming partly cloudy.
* Chance of Thunder..0%.
* Max Temperature....
*   Valleys..........79-89.
*   Mid Slope........78-88.
*   24 hr trend......Little change.
* Min Humidity.......
*   Valleys..........15-25%.
*   Mid Slope........14-24%.
*   24 hr trend......5% wetter.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph.
*   Ridge Top........Light winds becoming southwest 10 to 15 mph in
                     the afternoon.
* Chc Wetting Rain...5%.
* Mixing Height......1600-2100 ft agl increasing to 6800-7800 ft
                     agl in the afternoon.
* Transport Winds....South 10 to 15 mph.
* Ventilation........Fair increasing to excellent in the afternoon.

.TONIGHT...
* Sky/Weather........Partly cloudy.
* Chance of Thunder..0%.
* Min Temperature....
*   Valleys..........52-62.
*   Mid Slope........55-65.
*   24 hr trend......4 degrees warmer.
* Max Humidity.......
*   Valleys..........60-70%.
*   Mid Slope........38-48%.
*   24 hr trend......7% wetter.
* 20-Foot Winds......
*   Valleys/Slope....Downslope 2 to 5 mph.
*   Ridge Top........Light winds becoming southwest 10 to 15 mph in
                     the morning.
* Chc Wetting Rain...5%.
* Mixing Height......3100-4100 ft agl decreasing to 600-800 ft agl
                     after midnight.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Very good decreasing to marginal after
                     midnight.

.SATURDAY...
* Sky/Weather........Partly cloudy then becoming mostly cloudy.
                     Chance of showers and a slight chance of
                     thunderstorms in the afternoon.
* Chance of Thunder..20%.
* Max Temperature....
*   Valleys..........77-87.
*   Mid Slope........76-86.
* Min Humidity.......
*   Valleys..........21-31%.
*   Mid Slope........21-31%.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph.
*   Ridge Top........Southwest winds 10 to 15 mph.
* Chc Wetting Rain...10%.
* Mixing Height......900-1400 ft agl increasing to 5300-6300 ft agl
                     in the afternoon.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Marginal increasing to excellent in the
                     afternoon.


.Extended...
.SATURDAY NIGHT...Mostly cloudy. Slight chance of thunderstorms in
the evening. Chance of showers. Lows 49-59. Downslope 2 to 5 mph.
.SUNDAY...Partly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 74-84. Lows 47-57. Slope winds.
.MONDAY...Partly cloudy. Chance of thunderstorms. Highs 72-82. Lows
46-56. Slope winds.
.TUESDAY...Mostly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 70-80. Lows 44-54. Slope winds.
.WEDNESDAY...Mostly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 67-77. Lows 42-52.
.THURSDAY...Partly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 67-77.

$$

NVZ423-230100-
West Humboldt Basin in Pershing County-
437 AM PDT Fri Aug 22 2025

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 9 AM PDT SUNDAY...

.TODAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
*   Valleys..........96-102.
*   Mid Slope........91-101.
*   24 hr trend......Little change.
* Min Humidity.......
*   Valleys..........8-13%.
*   Mid Slope........9-14%.
*   24 hr trend......Little change.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph.
*   Ridge Top........Northeast winds 10 to 15 mph in the morning
                     becoming light.
* Chc Wetting Rain...0%.
* Mixing Height......1100-1600 ft agl increasing to 8400-9400 ft
                     agl in the afternoon.
* Transport Winds....Northeast 10 to 15 mph in the morning becoming
                     light.
* Ventilation........Fair increasing to excellent in the afternoon.

.TONIGHT...
* Sky/Weather........Mostly cloudy then becoming partly cloudy.
* Chance of Thunder..0%.
* Min Temperature....
*   Valleys..........61-71.
*   Mid Slope........64-73.
*   24 hr trend......4 degrees warmer.
* Max Humidity.......
*   Valleys..........23-33%.
*   Mid Slope........19-29%.
*   24 hr trend......Little change.
* 20-Foot Winds......
*   Valleys/Slope....Downslope 2 to 5 mph.
*   Ridge Top........Light winds.
* Chc Wetting Rain...0%.
* Mixing Height......5700-6700 ft agl decreasing to 600-800 ft agl
                     after midnight.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Very good decreasing to marginal after
                     midnight.

.SATURDAY...
* Sky/Weather........Sunny then becoming partly cloudy.
* Chance of Thunder..0%.
* Max Temperature....
*   Valleys..........95-103.
*   Mid Slope........91-101.
* Min Humidity.......
*   Valleys..........10-15%.
*   Mid Slope........10-15%.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph.
*   Ridge Top........Northwest winds 10 to 15 mph.
* Chc Wetting Rain...5%.
* Mixing Height......700-1200 ft agl increasing to 6800-7800 ft agl
                     in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Marginal increasing to very good in the
                     afternoon.


.Extended...
.SATURDAY NIGHT...Cloudy. Chance of showers. Lows 64-74. Southwest
winds 7 to 12 mph.
.SUNDAY...Mostly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 87-95. Lows 58-68. Slope winds.
.MONDAY...Mostly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 88-94. Lows 57-67. Slope winds.
.TUESDAY...Mostly cloudy. Chance of showers. Highs 86-92. Lows
57-67. Slope winds.
.WEDNESDAY THROUGH THURSDAY...Mostly cloudy. Chance of showers and a
slight chance of thunderstorms. Highs 82-88. Lows 54-64.

$$

NVZ429-230100-
Lahontan Basin including Churchill and Eastern Mineral Counties-
437 AM PDT Fri Aug 22 2025

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 9 AM PDT SUNDAY...

.TODAY...
* Sky/Weather........Sunny then becoming partly cloudy.
* Chance of Thunder..0%.
* Max Temperature....
*   Valleys..........93-103.
*   Mid Slope........88-98.
*   24 hr trend......Little change.
* Min Humidity.......
*   Valleys..........8-16%.
*   Mid Slope........9-15%.
*   24 hr trend......Little change.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph becoming west 5 to 10 mph
                     late in the afternoon.
*   Ridge Top........Light winds.
* Chc Wetting Rain...5%.
* Mixing Height......1400-1900 ft agl increasing to 8600-9600 ft
                     agl in the afternoon.
* Transport Winds....Light winds becoming southwest 10 to 15 mph in
                     the afternoon.
* Ventilation........Fair increasing to excellent in the afternoon.

.TONIGHT...
* Sky/Weather........Mostly cloudy then becoming partly cloudy.
* Chance of Thunder..0%.
* Min Temperature....
*   Valleys..........60-70.
*   Mid Slope........65-75.
*   24 hr trend......4 degrees warmer.
* Max Humidity.......
*   Valleys..........34-44%.
*   Mid Slope........22-32%.
*   24 hr trend......10% wetter.
* 20-Foot Winds......
*   Valleys/Slope....West winds 7 to 12 mph until early morning
                     becoming downslope 2 to 5 mph.
*   Ridge Top........West winds 10 to 15 mph.
* Chc Wetting Rain...5%.
* Mixing Height......5000-6000 ft agl decreasing to 600-800 ft agl
                     after midnight.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Excellent decreasing to marginal after
                     midnight.

.SATURDAY...
* Sky/Weather........Partly cloudy then becoming mostly cloudy.
                     Chance of showers and a slight chance of
                     thunderstorms in the afternoon.
* Chance of Thunder..20%.
* Max Temperature....
*   Valleys..........91-101.
*   Mid Slope........86-96.
* Min Humidity.......
*   Valleys..........10-20%.
*   Mid Slope........10-20%.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph.
*   Ridge Top........West winds 10 to 15 mph.
* Chc Wetting Rain...10%.
* Mixing Height......800-1300 ft agl increasing to 6300-7300 ft agl
                     in the afternoon.
* Transport Winds....Light winds.
* Ventilation........Marginal increasing to excellent in the
                     afternoon.


.Extended...
.SATURDAY NIGHT...Mostly cloudy. Slight chance of thunderstorms in
the evening. Chance of showers. Lows 60-70. Southwest winds 8 to
13 mph.
.SUNDAY...Mostly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 87-97. Lows 58-68. Slope winds.
.MONDAY THROUGH TUESDAY...Mostly cloudy. Chance of showers and a
slight chance of thunderstorms. Highs 83-93. Lows 56-66. Slope
winds.
.WEDNESDAY THROUGH THURSDAY...Mostly cloudy. Chance of showers and a
slight chance of thunderstorms. Highs 79-89. Lows 54-64.

$$

CAZ278-NVZ458-230100-
Eastern Lassen County-Northern Washoe County-
437 AM PDT Fri Aug 22 2025

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 9 AM PDT SUNDAY...

.TODAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
*   Valleys..........91-101.
*   Mid Slope........88-96.
*   24 hr trend......4 degrees warmer.
* Min Humidity.......
*   Valleys..........8-15%.
*   Mid Slope........10-15%.
*   24 hr trend......Little change.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph becoming southeast 8 to 13
                     mph with gusts to 20 mph in the late morning
                     and afternoon.
*   Ridge Top........Southeast winds 10 to 15 mph.
* Chc Wetting Rain...0%.
* Mixing Height......1200-1700 ft agl increasing to 8700-9700 ft
                     agl in the afternoon.
* Transport Winds....Southeast 10 to 15 mph.
* Ventilation........Fair increasing to excellent in the afternoon.

.TONIGHT...
* Sky/Weather........Partly cloudy.
* Chance of Thunder..0%.
* Min Temperature....
*   Valleys..........56-66.
*   Mid Slope........60-70.
*   24 hr trend......6 degrees warmer.
* Max Humidity.......
*   Valleys..........30-40%.
*   Mid Slope........23-33%.
*   24 hr trend......Little change.
* 20-Foot Winds......
*   Valleys/Slope....West winds 7 to 12 mph with gusts to 20 mph
                     until early morning becoming downslope 2 to 5
                     mph.
*   Ridge Top........West winds 10 to 15 mph.
* Chc Wetting Rain...0%.
* Mixing Height......5500-6500 ft agl decreasing to 600-700 ft agl
                     after midnight.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Excellent decreasing to marginal after
                     midnight.

.SATURDAY...
* Sky/Weather........Partly cloudy.Slight chance of showers in the
 afternoon.
* Chance of Thunder..0%.
* Max Temperature....
*   Valleys..........91-101.
*   Mid Slope........87-95.
* Min Humidity.......
*   Valleys..........11-20%.
*   Mid Slope........12-17%.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph becoming southwest 5 to 10
                     mph late in the afternoon.
*   Ridge Top........Southwest winds 10 to 15 mph.
* Chc Wetting Rain...5%.
* Mixing Height......700-1200 ft agl increasing to 7100-8100 ft agl
                     in the afternoon.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Marginal increasing to excellent in the
                     afternoon.


.Extended...
.SATURDAY NIGHT...Mostly cloudy. Slight chance of showers. Lows
56-66. West winds 8 to 13 mph until early morning becoming downslope
2 to 5 mph.
.SUNDAY...Mostly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 84-94. Lows 53-63. Slope winds.
.MONDAY THROUGH TUESDAY...Mostly cloudy. Chance of showers and a
slight chance of thunderstorms. Highs 82-92. Lows 51-61. Slope
winds.
.WEDNESDAY THROUGH THURSDAY...Mostly cloudy. Chance of showers and a
slight chance of thunderstorms. Highs 78-88. Lows 49-59.

$$

CAZ270-230100-
Surprise Valley California-
437 AM PDT Fri Aug 22 2025

.TODAY...
* Sky/Weather........Sunny.
* Chance of Thunder..0%.
* Max Temperature....
*   Valleys..........94-99.
*   Mid Slope........89-94.
*   24 hr trend......5 degrees warmer.
* Min Humidity.......
*   Valleys..........11-16%.
*   Mid Slope........11-16%.
*   24 hr trend......Little change.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph becoming south 8 to 13 mph
                     with gusts to 20 mph in the afternoon.
* Chc Wetting Rain...0%.
* Mixing Height......1500-2000 ft agl increasing to 11000-12000 ft
                     agl in the afternoon.
* Transport Winds....Southeast 10 to 15 mph.
* Ventilation........Fair increasing to excellent in the afternoon.

.TONIGHT...
* Sky/Weather........Partly cloudy.
* Chance of Thunder..0%.
* Min Temperature....
*   Valleys..........58-65.
*   Mid Slope........59-64.
*   24 hr trend......6 degrees warmer.
* Max Humidity.......
*   Valleys..........27-37%.
*   Mid Slope........24-34%.
*   24 hr trend......7% drier.
* 20-Foot Winds......
*   Valleys/Slope....Southwest winds 8 to 13 mph with gusts to 20 mph
                     in the evening becoming downslope 2 to 5 mph.
* Chc Wetting Rain...0%.
* Mixing Height......6600-7600 ft agl decreasing to 700-1200 ft agl
                     after midnight.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Excellent decreasing to marginal after
                     midnight.

.SATURDAY...
* Sky/Weather........Partly cloudy.
* Chance of Thunder..0%.
* Max Temperature....
*   Valleys..........92-99.
*   Mid Slope........88-93.
* Min Humidity.......
*   Valleys..........14-19%.
*   Mid Slope........15-20%.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph becoming southwest 6 to 11
                     mph late in the afternoon.
* Chc Wetting Rain...5%.
* Mixing Height......1000-1500 ft agl increasing to 7700-8700 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...
.SATURDAY NIGHT...Mostly cloudy. Lows 61-66. West winds 6 to 11 mph
in the evening becoming downslope 2 to 5 mph.
.SUNDAY...Mostly cloudy. Chance of thunderstorms. Highs 86-92. Lows
57-66. Slope winds.
.MONDAY THROUGH TUESDAY...Mostly cloudy. Chance of showers and a
slight chance of thunderstorms. Highs 83-91. Lows 55-61. Slope
winds.
.WEDNESDAY...Mostly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 80-86. Lows 52-60.
.THURSDAY...Partly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 78-85.

$$

CAZ271-230100-
Western Lassen, Eastern Plumas, and Eastern Sierra Counties-
437 AM PDT Fri Aug 22 2025

.TODAY...
* Sky/Weather........Sunny then becoming partly cloudy.
* Chance of Thunder..0%.
* Max Temperature....
*   Valleys..........88-98.
*   Mid Slope........85-95.
*   24 hr trend......Little change.
* Min Humidity.......
*   Valleys..........11-17%.
*   Mid Slope........11-17%.
*   24 hr trend......Little change.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph becoming southwest 8 to 13
                     mph with gusts to 20 mph in the afternoon.
*   Ridge Top........South winds 10 to 15 mph.
* Chc Wetting Rain...0%.
* Mixing Height......1400-1900 ft agl increasing to 8700-9700 ft
                     agl in the afternoon.
* Transport Winds....South 10 to 15 mph.
* Ventilation........Fair increasing to excellent in the afternoon.

.TONIGHT...
* Sky/Weather........Partly cloudy.
* Chance of Thunder..0%.
* Min Temperature....
*   Valleys..........49-59.
*   Mid Slope........57-67.
*   24 hr trend......6 degrees warmer.
* Max Humidity.......
*   Valleys..........42-52%.
*   Mid Slope........30-40%.
*   24 hr trend......Little change.
* 20-Foot Winds......
*   Valleys/Slope....West winds 8 to 13 mph with gusts to 25 mph in
                     the evening becoming downslope 2 to 5 mph.
*   Ridge Top........Light winds.
* Chc Wetting Rain...0%.
* Mixing Height......4200-5200 ft agl decreasing to 600-700 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..10%.
* Max Temperature....
*   Valleys..........86-96.
*   Mid Slope........84-94.
* Min Humidity.......
*   Valleys..........14-24%.
*   Mid Slope........15-23%.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph.
*   Ridge Top........Southwest winds 10 to 15 mph. Gusts to 20 mph in
                     the morning.
* Chc Wetting Rain...5%.
* Mixing Height......800-1300 ft agl increasing to 7300-8300 ft agl
                     in the afternoon.
* Transport Winds....South 10 to 15 mph.
* Ventilation........Marginal increasing to excellent in the
                     afternoon.


.Extended...
.SATURDAY NIGHT...Partly cloudy. Slight chance of thunderstorms in
the evening. Slight chance of showers after midnight. Lows 48-58.
West winds 5 to 10 mph in the evening becoming downslope 2 to 5 mph.
.SUNDAY...Partly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 83-93. Lows 45-55. Slope winds.
.MONDAY THROUGH TUESDAY...Partly cloudy. Chance of showers and a
slight chance of thunderstorms. Highs 80-90. Lows 43-53. Slope
winds.
.WEDNESDAY...Mostly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 76-86. Lows 41-51.
.THURSDAY...Partly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 75-85.

$$

CAZ274-230100-
Southern Mono County-
437 AM PDT Fri Aug 22 2025

.TODAY...
* Sky/Weather........Partly cloudy then becoming mostly cloudy.
                     Chance of showers and a slight chance of
                     thunderstorms in the afternoon.
* Chance of Thunder..20%.
* Max Temperature....
*   Valleys..........81-91.
*   Mid Slope........78-88.
*   24 hr trend......Little change.
* Min Humidity.......
*   Valleys..........13-23%.
*   Mid Slope........15-25%.
*   24 hr trend......11% wetter.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph becoming south 7 to 12 mph
                     with gusts to 20 mph in the afternoon.
*   Ridge Top........South winds 10 to 15 mph.
* Chc Wetting Rain...10%.
* Mixing Height......2600-3600 ft agl increasing to 8900-9900 ft
                     agl in the afternoon.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Very good increasing to excellent in the
                     afternoon.

.TONIGHT...
* Sky/Weather........Mostly cloudy then becoming clear. Slight
                     chance of showers in the evening.
* Chance of Thunder..20%.
* Min Temperature....
*   Valleys..........48-58.
*   Mid Slope........51-61.
*   24 hr trend......Little change.
* Max Humidity.......
*   Valleys..........55-65%.
*   Mid Slope........41-51%.
*   24 hr trend......15% wetter.
* 20-Foot Winds......
*   Valleys/Slope....West winds 5 to 10 mph with gusts to 20 mph in
                     the evening becoming downslope 2 to 5 mph.
*   Ridge Top........Light winds.
* Chc Wetting Rain...5%.
* Mixing Height......3000-4000 ft agl decreasing to 600-1000 ft agl
                     after midnight.
* Transport Winds....West 10 to 15 mph.
* Ventilation........Very good decreasing to marginal after
                     midnight.

.SATURDAY...
* Sky/Weather........Partly cloudy. Slight chance of showers in the
                     morning, then showers likely and a chance of
                     thunderstorms in the afternoon.
* Chance of Thunder..30%.
* Max Temperature....
*   Valleys..........77-87.
*   Mid Slope........74-84.
* Min Humidity.......
*   Valleys..........19-29%.
*   Mid Slope........21-31%.
* 20-Foot Winds......
*   Valleys/Slope....Upslope 4 to 8 mph becoming south 5 to 10 mph
                     with gusts to 20 mph late in the afternoon.
*   Ridge Top........South winds 10 to 15 mph.
* Chc Wetting Rain...40%.
* Mixing Height......1200-1700 ft agl increasing to 3900-4900 ft
                     agl in the afternoon.
* Transport Winds....Southwest 10 to 15 mph.
* Ventilation........Fair increasing to very good in the afternoon.


.Extended...
.SATURDAY NIGHT...Mostly cloudy. Slight chance of thunderstorms in
the evening. Chance of showers. Lows 45-55. West winds 5 to 10 mph
in the evening becoming downslope 2 to 5 mph.
.SUNDAY...Showers likely and a chance of thunderstorms. Highs 75-85.
Lows 45-55. Slope winds.
.MONDAY...Mostly cloudy. Slight chance of thunderstorms. Highs
72-82. Lows 43-53. Slope winds.
.TUESDAY...Showers likely and a slight chance of thunderstorms.
Highs 70-80. Lows 42-52. Slope winds.
.WEDNESDAY...Mostly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 69-79. Lows 40-50.
.THURSDAY...Partly cloudy. Chance of showers and a slight chance of
thunderstorms. Highs 69-79.

$$


.8 to 14 day outlook for (Fri Aug 29 through Thu Sep 4)
Near normal temperatures and Above normal precipitation.

=
$$

http://weather.gov/reno