789
FNUS55 KTWC 260908
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
208 AM MST WED AUG 26 2026
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
VERY ISOLATED THUNDERSTORMS (10 PERCENT OR LESS
CHANCE) FOR MOST LOCALES TODAY. STORM CHANCES NUDGE HIGHER TO AROUND
10 TO 30 PERCENT THURSDAY, WITH A MORE ACTIVE PATTERN TAKING HOLD AS
EARLY AS FRIDAY BUT ESPECIALLY THIS WEEKEND THROUGH MONDAY (30 TO 60
PERCENT DAILY CHANCE). TEMPERATURES WILL REMAIN WELL ABOVE NORMAL
THROUGH MOST OF THE WEEK WITH A COOLING TREND THIS WEEKEND INTO
EARLY NEXT WEEK. MINIMUM RELATIVE HUMIDITY VALUES MAINLY 10 TO 20
PERCENT IN THE VALLEYS AND 20 TO 30 PERCENT IN THE MOUNTAINS THROUGH
FRIDAY. MINIMUM RH VALUES INCREASE TO 20 TO 40 PERCENT STARTING
SATURDAY IN VALLEYS AND 30 TO 50 PERCENT IN THE MOUNTAINS. WINDS
WILL GENERALLY REMAIN LESS THAN 15 MPH AND TERRAIN DRIVEN THROUGH
THE WEEK.
AZZ150-262215-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
208 AM MST WED AUG 26 2026
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........103 TO 113 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MIN HUMIDITY.............12 TO 22 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH IN THE MORNING
BECOMING LIGHT.
* 10000 FT MSL WIND........EAST 10 TO 15 MPH.
* MIXING HEIGHT............14506 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 8 TO 9 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (130554 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (45-55 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........76 TO 86 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MAX HUMIDITY.............41 TO 51 PCT.
24 HR TREND...........UP 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH.
* 10000 FT MSL WIND........EAST 15 TO 20 MPH.
THURSDAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........102 TO 112 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............15 TO 25 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH IN THE MORNING
BECOMING LIGHT.
* 10000 FT MSL WIND........SOUTHEAST 10 TO 15 MPH.
* MIXING HEIGHT............14453 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 9 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (130077 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
FRIDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 76 TO 86. HIGHS 102 TO 112. LIGHT WINDS.
MINIMUM HUMIDITY 14 TO 23 PCT.
SATURDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 76 TO 86. HIGHS 99 TO 109. LIGHT WINDS.
MINIMUM HUMIDITY 19 TO 29 PCT.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 74 TO 84. HIGHS 95 TO 105. LIGHT WINDS.
MINIMUM HUMIDITY 26 TO 36 PCT.
MONDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 71 TO 81. HIGHS 92 TO 102.
TUESDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 71 TO 81. HIGHS 94 TO 104.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-262215-
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-
208 AM MST WED AUG 26 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (10-20 PCT) THEN BECOMING
PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........98 TO 108 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............13 TO 23 PCT.
24 HR TREND...........DOWN 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTH AROUND 10 MPH
IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTHEAST 10 TO 15 MPH.
* MIXING HEIGHT............11729 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 7 TO 12 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (140748 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........69 TO 79 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............45 TO 55 PCT.
24 HR TREND...........DOWN 8 TO 12 PCT.
* WIND (20 FT/10-MIN AVG)..WEST AROUND 10 MPH IN THE EVENING
BECOMING LIGHT.
* 10000 FT MSL WIND........EAST 10 TO 15 MPH.
THURSDAY
* 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..........97 TO 107 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............16 TO 26 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTHWEST AROUND 10
MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTHEAST 5 TO 10 MPH.
* MIXING HEIGHT............13795 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 7 TO 8 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (110360 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 69 TO 79. HIGHS 95 TO 105. LIGHT WINDS. MINIMUM HUMIDITY
19 TO 29 PCT.
SATURDAY
SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS. LOWS
67 TO 77. HIGHS 92 TO 102. LIGHT WINDS. MINIMUM HUMIDITY 24 TO
34 PCT.
SUNDAY
SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS. LOWS 65 TO
75. HIGHS 87 TO 97. LIGHT WINDS. MINIMUM HUMIDITY 34 TO 44 PCT.
MONDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 63 TO 73. HIGHS 85 TO 95.
TUESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 63 TO 73. HIGHS 86 TO 96.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-262215-
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-
208 AM MST WED AUG 26 2026
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........99 TO 109 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............8 TO 17 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTHEAST 10 TO 15 MPH.
* MIXING HEIGHT............12476 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 9 TO 11 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (137236 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........68 TO 78 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............33 TO 43 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..EAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTHEAST 10 TO 15 MPH.
THURSDAY
* SKY/WEATHER..............PARTLY CLOUDY (35-45 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.............10 TO 20 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTH 5 TO 10 MPH.
* MIXING HEIGHT............12989 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 9 TO 12 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (155868 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 68 TO 78. HIGHS 96 TO 106. LIGHT WINDS. MINIMUM HUMIDITY
14 TO 24 PCT.
SATURDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 67 TO 77. HIGHS 93 TO 103. LIGHT WINDS. MINIMUM HUMIDITY
18 TO 28 PCT.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 66 TO 76. HIGHS 89 TO 99. WEST WIND AROUND 15 MPH. MINIMUM
HUMIDITY 27 TO 37 PCT.
MONDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 63 TO 73. HIGHS 86 TO 96.
TUESDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 63 TO 73. HIGHS 88 TO 98.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-262215-
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-
208 AM MST WED AUG 26 2026
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........87 TO 97 DEGS.
24 HR TREND...........UP 1 DEG.
* MIN HUMIDITY.............12 TO 22 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..EAST AROUND 10 MPH SHIFTING TO THE SOUTH
IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............14846 FT AGL.
* TRANSPORT WINDS..........EAST 10 KNOTS SHIFTING TO THE SOUTH 9
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (133614 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT) THEN BECOMING
MOSTLY CLOUDY (45-55 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........62 TO 72 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MAX HUMIDITY.............35 TO 45 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHEAST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
THURSDAY
* SKY/WEATHER..............MOSTLY CLOUDY (45-55 PCT) THEN BECOMING
PARTLY CLOUDY (40-50 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........86 TO 96 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............15 TO 25 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..EAST AROUND 10 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTHWEST 5 TO 10 MPH.
* MIXING HEIGHT............13793 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 9 TO 11 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (151723 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 62 TO 72. HIGHS 84 TO 94. LIGHT WINDS. MINIMUM HUMIDITY
18 TO 28 PCT.
SATURDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 61 TO 71. HIGHS 82 TO 92. LIGHT WINDS. MINIMUM HUMIDITY
22 TO 32 PCT.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 59 TO 69. HIGHS 79 TO 89. LIGHT WINDS. MINIMUM HUMIDITY
29 TO 39 PCT.
MONDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 57 TO 67. HIGHS 77 TO 87.
TUESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 56 TO 66. HIGHS 78 TO 88.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-262215-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
208 AM MST WED AUG 26 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT) THEN BECOMING
PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........88 TO 98 DEGS.
24 HR TREND...........UP 1 DEG.
* MIN HUMIDITY.............14 TO 24 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTHEAST 10 TO 15 MPH.
* MIXING HEIGHT............14731 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 8 TO 13 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (154675 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........64 TO 74 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MAX HUMIDITY.............34 TO 44 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH SHIFTING TO THE EAST
AFTER MIDNIGHT.
* 10000 FT MSL WIND........SOUTHEAST 10 TO 15 MPH.
THURSDAY
* 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..........86 TO 96 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............18 TO 28 PCT.
24 HR TREND...........UP 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTHEAST 5 TO 10 MPH.
* MIXING HEIGHT............15159 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 7 TO 9 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (121272 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 63 TO 73. HIGHS 84 TO 94. LIGHT WINDS. MINIMUM HUMIDITY
20 TO 30 PCT.
SATURDAY
PARTLY CLOUDY. CHANCE OF THUNDERSTORMS AND SLIGHT
CHANCE OF SHOWERS. LOWS 62 TO 72. HIGHS 82 TO 92. LIGHT WINDS.
MINIMUM HUMIDITY 26 TO 36 PCT.
SUNDAY
SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS. LOWS 60 TO
70. HIGHS 77 TO 87. LIGHT WINDS. MINIMUM HUMIDITY 38 TO 48 PCT.
MONDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 58 TO 68. HIGHS 75 TO 85.
TUESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 58 TO 68. HIGHS 76 TO 86.
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE
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