348
FNUS55 KTWC 250906
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
206 AM MST TUE AUG 25 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 THROUGH WEDNESDAY, THOUGH SLIGHTLY HIGHER
CHANCES ALONG THE IMMEDIATE INT'L BORDER AND WHITE MOUNTAIN REGION.
THEREAFTER, STORM CHANCES NUDGE HIGHER TO AROUND 10 TO 30 PERCENT
THURSDAY AND TO MORE TYPICAL LEVELS OF 20 TO 60 PERCENT FRIDAY INTO
EARLY NEXT WEEK. 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 30 PERCENT FRIDAY IN VALLEYS AND
30-50 PERCENT IN THE MOUNTAINS, WITH EVEN HIGHER LEVELS OF 30 TO 40
PERCENT IN VALLEYS AND 40 TO 50 PERCENT IN THE MOUNTAINS. WINDS WILL
GENERALLY REMAIN LESS THAN 15 MPH AND TERRAIN DRIVEN THROUGH THE
WEEK.
AZZ150-252215-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
206 AM MST TUE AUG 25 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT) THEN BECOMING
PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........102 TO 112 DEGS.
24 HR TREND...........UP 3 TO 6 DEGS.
* MIN HUMIDITY.............13 TO 23 PCT.
24 HR TREND...........DOWN 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING NORTHWEST AROUND 10
MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........EAST 5 TO 10 MPH.
* MIXING HEIGHT............13196 FT AGL.
* TRANSPORT WINDS..........NORTH 6 TO 9 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (118764 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........77 TO 87 DEGS.
24 HR TREND...........UP 1 DEG.
* MAX HUMIDITY.............34 TO 44 PCT.
24 HR TREND...........DOWN 9 TO 13 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST AROUND 10 MPH IN THE EVENING
BECOMING LIGHT.
* 10000 FT MSL WIND........NORTHEAST 10 TO 15 MPH.
WEDNESDAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT) THEN BECOMING
PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........103 TO 113 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............11 TO 21 PCT.
24 HR TREND...........DOWN 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING WEST AROUND 10 MPH
IN THE AFTERNOON.
* 10000 FT MSL WIND........EAST 15 TO 20 MPH.
* MIXING HEIGHT............13897 FT AGL.
* TRANSPORT WINDS..........SOUTH 10 KNOTS SHIFTING TO THE WEST 8
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (111176 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
MOSTLY CLEAR. LOWS 77 TO 87. HIGHS 102 TO 112. LIGHT
WINDS. MINIMUM HUMIDITY 12 TO 22 PCT.
FRIDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 77 TO 87. HIGHS 101 TO 111. LIGHT WINDS.
MINIMUM HUMIDITY 15 TO 24 PCT.
SATURDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 76 TO 86. HIGHS 99 TO 109. LIGHT WINDS.
MINIMUM HUMIDITY 18 TO 27 PCT.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 74 TO 84. HIGHS 95 TO 105.
MONDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 71 TO 81. HIGHS 92 TO 102.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-252215-
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-
206 AM MST TUE AUG 25 2026
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........96 TO 106 DEGS.
24 HR TREND...........UP 3 TO 6 DEGS.
* MIN HUMIDITY.............15 TO 25 PCT.
24 HR TREND...........DOWN 6 TO 10 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING NORTH AROUND 10 MPH
IN THE AFTERNOON.
* 10000 FT MSL WIND........EAST 10 TO 15 MPH.
* MIXING HEIGHT............12342 FT AGL.
* TRANSPORT WINDS..........NORTH 7 KNOTS SHIFTING TO THE EAST 8
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....VERY GOOD (98736 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........68 TO 78 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MAX HUMIDITY.............42 TO 52 PCT.
24 HR TREND...........DOWN 7 TO 11 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST AROUND 10 MPH.
* 10000 FT MSL WIND........NORTHEAST 5 TO 10 MPH.
WEDNESDAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT) THEN BECOMING
PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........97 TO 107 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............13 TO 23 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTHWEST AROUND 10
MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........EAST 10 TO 15 MPH.
* MIXING HEIGHT............12349 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 8 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (98792 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 69 TO 79. HIGHS 96 TO 106. LIGHT WINDS.
MINIMUM HUMIDITY 15 TO 25 PCT.
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 69 TO 79. HIGHS 95 TO 105. LIGHT WINDS. MINIMUM HUMIDITY
18 TO 28 PCT.
SATURDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 67 TO 77. HIGHS 92 TO 102. LIGHT WINDS. MINIMUM HUMIDITY
22 TO 32 PCT.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 66 TO 76. HIGHS 88 TO 98.
MONDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 63 TO 73. HIGHS 85 TO 95.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-252215-
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-
206 AM MST TUE AUG 25 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (20-30 PCT) THEN BECOMING
PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........98 TO 108 DEGS.
24 HR TREND...........UP 3 TO 6 DEGS.
* MIN HUMIDITY.............10 TO 20 PCT.
24 HR TREND...........DOWN 4 TO 8 PCT.
* WIND (20 FT/10-MIN AVG)..NORTH AROUND 10 MPH SHIFTING TO THE
SOUTHEAST IN THE AFTERNOON.
* 10000 FT MSL WIND........EAST 5 TO 10 MPH.
* MIXING HEIGHT............12738 FT AGL.
* TRANSPORT WINDS..........NORTH 8 KNOTS SHIFTING TO THE SOUTHEAST
9 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (114642 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........68 TO 78 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MAX HUMIDITY.............36 TO 46 PCT.
24 HR TREND...........DOWN 4 TO 8 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHEAST 5 TO 10 MPH.
WEDNESDAY
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........98 TO 108 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............9 TO 19 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTHEAST 5 TO 10 MPH.
* MIXING HEIGHT............13206 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 8 TO 9 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (118854 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 69 TO 79. HIGHS 97 TO 107. LIGHT WINDS.
MINIMUM HUMIDITY 11 TO 21 PCT.
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 68 TO 78. HIGHS 95 TO 105. 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.
MONDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 63 TO 73. HIGHS 86 TO 96.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-252215-
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-
206 AM MST TUE AUG 25 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..........87 TO 97 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............13 TO 23 PCT.
24 HR TREND...........DOWN 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........NORTHEAST AROUND 5 MPH SHIFTING TO THE
SOUTH IN THE AFTERNOON.
* MIXING HEIGHT............13943 FT AGL.
* TRANSPORT WINDS..........NORTHEAST 10 KNOTS SHIFTING TO THE SOUTH
8 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (111544 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........61 TO 71 DEGS.
24 HR TREND...........UP 1 DEG.
* MAX HUMIDITY.............37 TO 47 PCT.
24 HR TREND...........DOWN 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST AROUND 15 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
* 10000 FT MSL WIND........WEST AROUND 5 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........87 TO 97 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............13 TO 23 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..EAST AROUND 10 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 5 TO 10 MPH.
* MIXING HEIGHT............14343 FT AGL.
* TRANSPORT WINDS..........EAST 10 KNOTS SHIFTING TO THE SOUTHWEST
IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (143430 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 61 TO 71. HIGHS 85 TO 95. NORTHEAST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 16 TO 26 PCT.
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 61 TO 71. HIGHS 84 TO 94. LIGHT WINDS. MINIMUM HUMIDITY
18 TO 28 PCT.
SATURDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 60 TO 70. HIGHS 83 TO 93. LIGHT WINDS. MINIMUM HUMIDITY
22 TO 32 PCT.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 59 TO 69. HIGHS 79 TO 89.
MONDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 56 TO 66. HIGHS 77 TO 87.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-252215-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
206 AM MST TUE AUG 25 2026
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........86 TO 96 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MIN HUMIDITY.............17 TO 27 PCT.
24 HR TREND...........UP 1 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........EAST 10 TO 15 MPH.
* MIXING HEIGHT............14380 FT AGL.
* TRANSPORT WINDS..........NORTHEAST 9 KNOTS SHIFTING TO THE
SOUTHEAST 10 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (143800 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........64 TO 74 DEGS.
24 HR TREND...........UP 1 DEG.
* MAX HUMIDITY.............35 TO 45 PCT.
24 HR TREND...........DOWN 8 TO 12 PCT.
* WIND (20 FT/10-MIN AVG)..NORTH 10 TO 15 MPH.
* 10000 FT MSL WIND........EAST 5 TO 10 MPH.
WEDNESDAY
* SKY/WEATHER..............MOSTLY SUNNY (20-30 PCT) THEN BECOMING
PARTLY CLOUDY (30-40 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.............14 TO 24 PCT.
24 HR TREND...........DOWN 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..EAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTHEAST 5 TO 10 MPH.
* MIXING HEIGHT............14921 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 8 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (119368 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 64 TO 74. HIGHS 86 TO 96. LIGHT WINDS.
MINIMUM HUMIDITY 16 TO 26 PCT.
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
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 62 TO 72. HIGHS 82 TO 92. LIGHT WINDS. MINIMUM HUMIDITY
25 TO 35 PCT.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 60 TO 70. HIGHS 78 TO 88.
MONDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 58 TO 68. HIGHS 75 TO 85.
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE
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