FNUS55 KTWC 230912 FWFTWC Fire Weather Planning Forecast for Southeast Arizona National Weather Service Tucson AZ 212 AM MST Sun Aug 23 2026 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY TERRAIN DRIVEN WINDS +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ .DISCUSSION...Isolated to scattered thunderstorms expected through Monday, with the exception of along the NM border where mainly dry conditions are expected. Thereafter, reduced chances for thunderstorm activity for most of southeast Arizona for the rest of the work week, though some isolated storms will continue along the immediate Int'l border and White Mountain region. Temperatures will remain well above normal through most of the week with Monday being the coolest day of the period. Drier conditions will return in the middle of the week with minimum relative humidity values mainly 10- 18 percent in the valleys and 20-30 percent. Winds will generally remain less than 15 mph and terrain driven through the week. AZZ150-232215- Arizona Fire Weather Zone 150 Sonoran FDRA-Most of Pima County-South Central Pinal County- Tohono O'odham Nation-Tucson Metropolitan area-TDC- 212 AM MST Sun Aug 23 2026 .TODAY... * Sky/Weather..............Partly cloudy (35-45 pct). Slight chance of showers and thunderstorms. * Chance of Precip.........10 pct. * Chance of Thunder........10 pct. * Max Temperature..........100 to 110 degs. 24 hr Trend...........Down 1 deg. * Min Humidity.............17 to 27 pct. 24 hr Trend...........Up 2 to 5 pct. * Wind (20 ft/10-min avg)..South around 10 mph shifting to the west in the afternoon. * 10000 ft MSL Wind........Southeast 5 to 10 mph. * Mixing height............12923 ft AGL. * Transport winds..........Southwest 8 to 10 knots. * Ventilation Category.....Excellent (129230 knot-ft). .TONIGHT... * Sky/Weather..............Partly cloudy (40-50 pct) then becoming mostly cloudy (45-55 pct). Slight chance of showers and thunderstorms. * Chance of Precip.........30 pct. * Chance of Thunder........20 pct. * Min Temperature..........74 to 84 degs. 24 hr Trend...........Down 2 to 5 degs. * Max Humidity.............59 to 69 pct. 24 hr Trend...........Up 19 to 23 pct. * Wind (20 ft/10-min avg)..Southwest around 15 mph shifting to the south after midnight. * 10000 ft MSL Wind........Northeast 10 to 15 mph. .MONDAY... * Sky/Weather..............Partly cloudy (40-50 pct) then becoming mostly sunny (20-30 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Max Temperature..........97 to 107 degs. 24 hr Trend...........Down 1 to 4 degs. * Min Humidity.............23 to 33 pct. 24 hr Trend...........Up 3 to 7 pct. * Wind (20 ft/10-min avg)..Light winds becoming northwest around 10 mph in the afternoon. * 10000 ft MSL Wind........East 10 to 15 mph. * Mixing height............9411 ft AGL. * Transport winds..........Southwest 11 knots shifting to the northwest 8 knots in the afternoon. * Ventilation Category.....Very good (75288 knot-ft). .Forecast days 3 through 7...... Winds in Days 3 through 5 are surface 20 ft/10-min avg .TUESDAY...Mostly clear. Lows 75 to 85. Highs 101 to 111. Light winds. Minimum Humidity 14 to 21 pct. .WEDNESDAY...Mostly clear. Lows 77 to 87. Highs 102 to 112. Light winds. Minimum Humidity 12 to 22 pct. .THURSDAY...Mostly clear. Lows 78 to 88. Highs 103 to 113. Light winds. Minimum Humidity 12 to 22 pct. .FRIDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows 77 to 87. Highs 103 to 113. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 78 to 88. Highs 103 to 113. NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT LOCATION (2550 MSL) $$ AZZ151-232215- Arizona Fire Weather Zone 151 Western half Desert Grasslands FDRA including elevations up to 5500 feet in Southeast corner of Pinal County- Extreme Eastern Pima County-Western third of Cochise County- Santa Cruz County-TDC- 212 AM MST Sun Aug 23 2026 .TODAY... * Sky/Weather..............Partly cloudy (40-50 pct). Slight chance of showers and thunderstorms. * Chance of Precip.........10 pct. * Chance of Thunder........10 pct. * Max Temperature..........94 to 104 degs. 24 hr Trend...........Down 1 to 4 degs. * Min Humidity.............18 to 28 pct. 24 hr Trend...........Down 3 to 6 pct. * Wind (20 ft/10-min avg)..Southeast around 10 mph shifting to the southwest in the afternoon. * 10000 ft MSL Wind........East 5 to 10 mph. * Mixing height............11717 ft AGL. * Transport winds..........Southeast 7 to 10 knots. * Ventilation Category.....Excellent (117170 knot-ft). .TONIGHT... * Sky/Weather..............Partly cloudy (40-50 pct) then becoming mostly cloudy (45-55 pct). Slight chance of showers and thunderstorms. * Chance of Precip.........10 pct. * Chance of Thunder........10 pct. * Min Temperature..........66 to 76 degs. 24 hr Trend...........Down 1 to 4 degs. * Max Humidity.............65 to 75 pct. 24 hr Trend...........Up 36 to 40 pct. * Wind (20 ft/10-min avg)..West 10 to 15 mph. * 10000 ft MSL Wind........Northeast 10 to 15 mph. .MONDAY... * Sky/Weather..............Partly cloudy (30-40 pct). * Chance of Precip.........10 pct. * Chance of Thunder........0 pct. * Max Temperature..........92 to 102 degs. 24 hr Trend...........Down 1 to 4 degs. * Min Humidity.............24 to 34 pct. 24 hr Trend...........Up 7 to 11 pct. * Wind (20 ft/10-min avg)..Light winds becoming northwest around 10 mph in the afternoon. * 10000 ft MSL Wind........East 10 to 15 mph. * Mixing height............9150 ft AGL. * Transport winds..........West 7 knots shifting to the east 9 knots in the afternoon. * Ventilation Category.....Very good (82350 knot-ft). .Forecast days 3 through 7...... Winds in Days 3 through 5 are surface 20 ft/10-min avg .TUESDAY...Mostly clear. Lows 67 to 77. Highs 95 to 105. Light winds. Minimum Humidity 16 to 26 pct. .WEDNESDAY...Mostly clear. Lows 69 to 79. Highs 96 to 106. Light winds. Minimum Humidity 15 to 25 pct. .THURSDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 69 to 79. Highs 97 to 107. Light winds. Minimum Humidity 14 to 24 pct. .FRIDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows 69 to 79. Highs 97 to 107. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 70 to 80. Highs 97 to 107. NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION (3500 MSL) $$ AZZ152-232215- Arizona Fire Weather Zone 152 Eastern half Desert Grasslands FDRA including elevations up to 5500 feet in Southwest Graham County and Eastern two thirds of Cochise County-Southern San Carlos Reservation- Southern Greenlee County below 5000 feet-TDC- 212 AM MST Sun Aug 23 2026 .TODAY... * Sky/Weather..............Partly cloudy (30-40 pct). * Chance of Precip.........10 pct. * Chance of Thunder........0 pct. * Max Temperature..........96 to 106 degs. 24 hr Trend...........Down 1 to 4 degs. * Min Humidity.............11 to 21 pct. 24 hr Trend...........Down 1 to 4 pct. * Wind (20 ft/10-min avg)..Southeast around 10 mph. * 10000 ft MSL Wind........Southeast 10 to 15 mph. * Mixing height............11849 ft AGL. * Transport winds..........Southeast 9 knots. * Ventilation Category.....Excellent (106641 knot-ft). .TONIGHT... * Sky/Weather..............Partly cloudy (35-45 pct). * Chance of Precip.........10 pct. * Chance of Thunder........0 pct. * Min Temperature..........66 to 76 degs. 24 hr Trend...........Down 1 to 4 degs. * Max Humidity.............51 to 61 pct. 24 hr Trend...........Down 1 to 4 pct. * Wind (20 ft/10-min avg)..Southwest around 15 mph shifting to the northwest after midnight. * 10000 ft MSL Wind........Southeast 10 to 15 mph. .MONDAY... * Sky/Weather..............Partly cloudy (35-45 pct). * Chance of Precip.........10 pct. * Chance of Thunder........0 pct. * Max Temperature..........95 to 105 degs. 24 hr Trend...........Little change. * Min Humidity.............15 to 25 pct. 24 hr Trend...........Down 1 to 4 pct. * Wind (20 ft/10-min avg)..Light winds becoming northwest around 10 mph in the afternoon. * 10000 ft MSL Wind........Southeast 10 to 15 mph. * Mixing height............11567 ft AGL. * Transport winds..........Northwest 7 knots shifting to the southeast 8 knots in the afternoon. * Ventilation Category.....Very good (92536 knot-ft). .Forecast days 3 through 7...... Winds in Days 3 through 5 are surface 20 ft/10-min avg .TUESDAY...Mostly clear. Lows 67 to 77. Highs 97 to 107. North wind around 15 mph. Minimum Humidity 11 to 21 pct. .WEDNESDAY...Mostly clear. Lows 68 to 78. Highs 97 to 107. Northeast wind around 15 mph. Minimum Humidity 10 to 20 pct. .THURSDAY...Partly cloudy. Lows 69 to 79. Highs 97 to 107. Light winds. Minimum Humidity 10 to 20 pct. .FRIDAY...Mostly clear. Lows 68 to 78. Highs 97 to 107. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 69 to 79. Highs 97 to 107. NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL) $$ AZZ153-232215- Arizona Fire Weather Zone 153 Northern Graham County-Northern Greenlee County- White and Gila Mountains-Apache Sitgreaves NF- Southern San Carlos Reservation above 5000 feet-SDC- 212 AM MST Sun Aug 23 2026 .TODAY... * Sky/Weather..............Partly cloudy (35-45 pct). * Chance of Precip.........10 pct. * Chance of Thunder........0 pct. * Max Temperature..........85 to 95 degs. 24 hr Trend...........Little change. * Min Humidity.............16 to 26 pct. 24 hr Trend...........Down 2 to 5 pct. * Wind (20 ft/10-min avg)..East around 10 mph shifting to the south in the afternoon. * 10000 ft MSL Wind........South 5 to 10 mph. * Mixing height............12844 ft AGL. * Transport winds..........East 8 knots shifting to the south 9 knots in the afternoon. * Ventilation Category.....Excellent (115596 knot-ft). .TONIGHT... * Sky/Weather..............Partly cloudy (35-45 pct). * Chance of Precip.........10 pct. * Chance of Thunder........0 pct. * Min Temperature..........59 to 69 degs. 24 hr Trend...........Little change. * Max Humidity.............45 to 55 pct. 24 hr Trend...........Down 1 to 4 pct. * Wind (20 ft/10-min avg)..Southeast around 15 mph shifting to the north after midnight. * 10000 ft MSL Wind........South 5 to 10 mph. .MONDAY... * Sky/Weather..............Partly cloudy (40-50 pct). Slight chance of showers and thunderstorms.* Chance of Precip.........10 pct. * Chance of Thunder........10 pct. * Max Temperature..........85 to 95 degs. 24 hr Trend...........Little change. * Min Humidity.............15 to 25 pct. 24 hr Trend...........Up 1 to 4 pct. * Wind (20 ft/10-min avg)..Northeast around 10 mph shifting to the southwest in the afternoon. * 10000 ft MSL Wind........Southeast 5 to 10 mph. * Mixing height............12396 ft AGL. * Transport winds..........Northeast 8 knots shifting to the south 9 knots in the afternoon. * Ventilation Category.....Excellent (111564 knot-ft). .Forecast days 3 through 7...... Winds in Days 3 through 5 are surface 20 ft/10-min avg .TUESDAY...Partly cloudy. Lows 60 to 70. Highs 86 to 96. North wind around 15 mph. Minimum Humidity 15 to 25 pct. .WEDNESDAY...Partly cloudy. Lows 60 to 70. Highs 87 to 97. North wind around 15 mph. Minimum Humidity 14 to 24 pct. .THURSDAY...Partly cloudy. Lows 60 to 70. Highs 86 to 96. North wind around 15 mph. Minimum Humidity 16 to 26 pct. .FRIDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 60 to 70. Highs 87 to 97. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 61 to 71. Highs 87 to 97. NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL) $$ AZZ154-232215- Arizona Fire Weather Zone 154 Forest Woodlands FDRA including the Sky Islands of Southeast Arizona above 5500 feet-Coronado NF-TDC- 212 AM MST Sun Aug 23 2026 .TODAY... * Sky/Weather..............Partly cloudy (35-45 pct). * Chance of Precip.........10 pct. * Chance of Thunder........0 pct. * Max Temperature..........84 to 94 degs. 24 hr Trend...........Down 1 deg. * Min Humidity.............17 to 27 pct. 24 hr Trend...........Down 1 to 4 pct. * Wind (20 ft/10-min avg)..East around 10 mph. * 10000 ft MSL Wind........East 5 to 10 mph. * Mixing height............13103 ft AGL. * Transport winds..........East 9 to 10 knots. * Ventilation Category.....Excellent (124478 knot-ft). .TONIGHT... * Sky/Weather..............Partly cloudy (35-45 pct) then becoming mostly cloudy (45-55 pct). Slight chance of showers and thunderstorms. * Chance of Precip.........10 pct. * Chance of Thunder........10 pct. * Min Temperature..........61 to 71 degs. 24 hr Trend...........Down 2 to 5 degs. * Max Humidity.............52 to 62 pct. 24 hr Trend...........Up 9 to 13 pct. * Wind (20 ft/10-min avg)..Southwest around 15 mph shifting to the northwest after midnight. * 10000 ft MSL Wind........East 10 to 15 mph. .MONDAY... * Sky/Weather..............Partly cloudy (35-45 pct). * Chance of Precip.........10 pct. * Chance of Thunder........0 pct. * Max Temperature..........83 to 93 degs. 24 hr Trend...........Down 1 deg. * Min Humidity.............24 to 34 pct. 24 hr Trend...........Up 1 pct. * Wind (20 ft/10-min avg)..North around 10 mph. * 10000 ft MSL Wind........East 10 to 15 mph. * Mixing height............13120 ft AGL. * Transport winds..........North 7 knots shifting to the southeast 8 knots in the afternoon. * Ventilation Category.....Excellent (104960 knot-ft). .Forecast days 3 through 7...... Winds in Days 3 through 5 are surface 20 ft/10-min avg .TUESDAY...Mostly clear. Lows 62 to 72. Highs 85 to 95. North wind around 15 mph. Minimum Humidity 18 to 28 pct. .WEDNESDAY...Partly cloudy. Lows 63 to 73. Highs 86 to 96. North wind around 15 mph. Minimum Humidity 16 to 26 pct. .THURSDAY...Partly cloudy. Lows 64 to 74. Highs 86 to 96. Light winds. Minimum Humidity 16 to 26 pct. .FRIDAY...Partlycloudy. Slight chance of showers and thunderstorms. Lows 64 to 74. Highs 86 to 96. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 64 to 74. Highs 86 to 96. NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson