385
FNUS55 KTWC 161012
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
312 AM MST WED SEP 16 2026
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
AN ACTIVE WEEK CONTINUES WITH DAILY CHANCES OF
SHOWERS AND STORMS CAPABLE OF PRODUCING HEAVY RAINFALL. HIGH
TEMPERATURES WILL FLUCTUATE BETWEEN NEAR NORMAL AND A FEW DEGREES
BELOW NORMAL. MIN RH VALUES MAINLY 20 TO 45 PERCENT IN THE VALLEYS
AND 35 TO 65 PERCENT IN THE MOUNTAINS OVER THE NEXT WEEK. RH
RECOVERIES WILL CONTINUE TO BE EXCELLENT OVERNIGHT. WINDS WILL
GENERALLY REMAIN LESS THAN 15 MPH AND TERRAIN DRIVEN. GUSTY AND
ERRATIC WINDS WILL ACCOMPANY THUNDERSTORMS.
AZZ150-162200-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
312 AM MST WED SEP 16 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (65-75 PCT). SHOWERS AND
CHANCE OF THUNDERSTORMS.
* CHANCE OF PRECIP.........80 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........80 TO 90 DEGS.
24 HR TREND...........DOWN 7 TO 11 DEGS.
* MIN HUMIDITY.............53 TO 63 PCT.
24 HR TREND...........UP 23 TO 27 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
* MIXING HEIGHT............5026 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 13 TO 14 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (70364 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........70 PCT.
* CHANCE OF THUNDER........50 PCT.
* MIN TEMPERATURE..........65 TO 75 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MAX HUMIDITY.............81 TO 91 PCT.
24 HR TREND...........UP 8 TO 12 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
THURSDAY
* 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 3 TO 7 DEGS.
* MIN HUMIDITY.............35 TO 45 PCT.
24 HR TREND...........DOWN 12 TO 16 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........SOUTHWEST 10 TO 15 MPH.
* MIXING HEIGHT............5614 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 7 TO 10 KNOTS.
* VENTILATION CATEGORY.....GOOD (56140 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
FRIDAY
MOSTLY CLEAR. LOWS 66 TO 76. HIGHS 90 TO 100. LIGHT
WINDS. MINIMUM HUMIDITY 24 TO 34 PCT.
SATURDAY
CLEAR. LOWS 68 TO 78. HIGHS 92 TO 102. LIGHT WINDS.
MINIMUM HUMIDITY 20 TO 30 PCT.
SUNDAY
MOSTLY CLEAR. LOWS 67 TO 77. HIGHS 91 TO 101. LIGHT
WINDS. MINIMUM HUMIDITY 19 TO 29 PCT.
MONDAY
MOSTLY CLEAR. LOWS 68 TO 78. HIGHS 90 TO 100.
TUESDAY
MOSTLY CLEAR. LOWS 66 TO 76. HIGHS 90 TO 100.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-162200-
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-
312 AM MST WED SEP 16 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (70-80 PCT). CHANCE OF
THUNDERSTORMS AND SLIGHT CHANCE OF
SHOWERS.
* CHANCE OF PRECIP.........80 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........74 TO 84 DEGS.
24 HR TREND...........DOWN 3 TO 6 DEGS.
* MIN HUMIDITY.............61 TO 71 PCT.
24 HR TREND...........UP 8 TO 12 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
* MIXING HEIGHT............4140 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 10 TO 11 KNOTS.
* VENTILATION CATEGORY.....GOOD (45540 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........70 PCT.
* CHANCE OF THUNDER........50 PCT.
* MIN TEMPERATURE..........58 TO 68 DEGS.
24 HR TREND...........DOWN 3 TO 6 DEGS.
* MAX HUMIDITY.............88 TO 98 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 20 TO 25 MPH.
THURSDAY
* SKY/WEATHER..............MOSTLY CLOUDY (50-60 PCT) THEN BECOMING
PARTLY CLOUDY (35-45 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........80 TO 90 DEGS.
24 HR TREND...........UP 3 TO 6 DEGS.
* MIN HUMIDITY.............43 TO 53 PCT.
24 HR TREND...........DOWN 15 TO 19 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH IN THE MORNING
BECOMING LIGHT.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............5850 FT AGL.
* TRANSPORT WINDS..........SOUTH 6 TO 8 KNOTS.
* VENTILATION CATEGORY.....GOOD (46800 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
FRIDAY
MOSTLY CLEAR. LOWS 60 TO 70. HIGHS 83 TO 93. LIGHT
WINDS. MINIMUM HUMIDITY 34 TO 44 PCT.
SATURDAY
CLEAR. LOWS 61 TO 71. HIGHS 84 TO 94. LIGHT WINDS.
MINIMUM HUMIDITY 28 TO 38 PCT.
SUNDAY
MOSTLY CLEAR. LOWS 60 TO 70. HIGHS 83 TO 93. LIGHT
WINDS. MINIMUM HUMIDITY 27 TO 37 PCT.
MONDAY
PARTLY CLOUDY. LOWS 60 TO 70. HIGHS 82 TO 92.
TUESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 59 TO 69. HIGHS 82 TO 92.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-162200-
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-
312 AM MST WED SEP 16 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (70-80 PCT). CHANCE OF
THUNDERSTORMS AND SLIGHT CHANCE OF
SHOWERS.
* CHANCE OF PRECIP.........80 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........76 TO 86 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............58 TO 68 PCT.
24 HR TREND...........UP 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
* MIXING HEIGHT............4556 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 10 TO 11 KNOTS.
* VENTILATION CATEGORY.....GOOD (50116 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (65-75 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........70 PCT.
* CHANCE OF THUNDER........50 PCT.
* MIN TEMPERATURE..........59 TO 69 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MAX HUMIDITY.............85 TO 95 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 20 TO 25 MPH.
THURSDAY
* SKY/WEATHER..............MOSTLY CLOUDY (45-55 PCT) THEN BECOMING
PARTLY CLOUDY (35-45 PCT). SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........10 PCT.
* MAX TEMPERATURE..........80 TO 90 DEGS.
24 HR TREND...........UP 3 TO 6 DEGS.
* MIN HUMIDITY.............45 TO 55 PCT.
24 HR TREND...........DOWN 6 TO 10 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............5931 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 9 TO 10 KNOTS.
* VENTILATION CATEGORY.....GOOD (59310 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
FRIDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 60 TO 70. HIGHS 82 TO 92. LIGHT WINDS.
MINIMUM HUMIDITY 35 TO 45 PCT.
SATURDAY
MOSTLY CLEAR. LOWS 60 TO 70. HIGHS 83 TO 93. LIGHT
WINDS. MINIMUM HUMIDITY 30 TO 40 PCT.
SUNDAY
MOSTLY CLEAR. LOWS 59 TO 69. HIGHS 82 TO 92. LIGHT
WINDS. MINIMUM HUMIDITY 25 TO 35 PCT.
MONDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 59 TO 69. HIGHS 81 TO 91.
TUESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 59 TO 69. HIGHS 80 TO 90.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-162200-
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-
312 AM MST WED SEP 16 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (75-85 PCT). THUNDERSTORMS
LIKELY AND SLIGHT CHANCE OF SHOWERS.
* CHANCE OF PRECIP.........80 PCT.
* CHANCE OF THUNDER........70 PCT.
* MAX TEMPERATURE..........67 TO 77 DEGS.
24 HR TREND...........DOWN 3 TO 7 DEGS.
* MIN HUMIDITY.............62 TO 72 PCT.
24 HR TREND...........UP 10 TO 14 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
* MIXING HEIGHT............3745 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 11 TO 12 KNOTS.
* VENTILATION CATEGORY.....GOOD (44940 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (80-90 PCT). SHOWERS AND
CHANCE OF THUNDERSTORMS.
* CHANCE OF PRECIP.........90 PCT.
* CHANCE OF THUNDER........50 PCT.
* MIN TEMPERATURE..........53 TO 63 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MAX HUMIDITY.............83 TO 93 PCT.
24 HR TREND...........UP 18 TO 22 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 20 TO 25 MPH.
THURSDAY
* SKY/WEATHER..............MOSTLY CLOUDY (65-75 PCT) THEN BECOMING
PARTLY CLOUDY (45-55 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........30 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........69 TO 79 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MIN HUMIDITY.............50 TO 60 PCT.
24 HR TREND...........DOWN 6 TO 10 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH AROUND 25 MPH DECREASING TO AROUND
15 MPH IN THE AFTERNOON.
* MIXING HEIGHT............4961 FT AGL.
* TRANSPORT WINDS..........SOUTH 13 KNOTS.
* VENTILATION CATEGORY.....GOOD (64493 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 52 TO 62. HIGHS 72 TO 82. LIGHT WINDS.
MINIMUM HUMIDITY 40 TO 50 PCT.
SATURDAY
MOSTLY CLEAR. LOWS 52 TO 62. HIGHS 73 TO 83. LIGHT
WINDS. MINIMUM HUMIDITY 33 TO 43 PCT.
SUNDAY
MOSTLY CLEAR. LOWS 50 TO 60. HIGHS 72 TO 82. LIGHT
WINDS. MINIMUM HUMIDITY 25 TO 35 PCT.
MONDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 50 TO 60. HIGHS 71 TO 81.
TUESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 51 TO 61. HIGHS 69 TO 79.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-162200-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
312 AM MST WED SEP 16 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (70-80 PCT). CHANCE OF
THUNDERSTORMS AND SLIGHT CHANCE OF
SHOWERS.
* CHANCE OF PRECIP.........80 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........65 TO 75 DEGS.
24 HR TREND...........DOWN 5 TO 9 DEGS.
* MIN HUMIDITY.............67 TO 77 PCT.
24 HR TREND...........UP 10 TO 14 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
* MIXING HEIGHT............5581 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 10 TO 12 KNOTS.
* VENTILATION CATEGORY.....GOOD (61391 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........60 PCT.
* CHANCE OF THUNDER........50 PCT.
* MIN TEMPERATURE..........53 TO 63 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MAX HUMIDITY.............87 TO 97 PCT.
24 HR TREND...........UP 10 TO 14 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 20 TO 25 MPH.
THURSDAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........69 TO 79 DEGS.
24 HR TREND...........UP 4 TO 8 DEGS.
* MIN HUMIDITY.............57 TO 67 PCT.
24 HR TREND...........DOWN 19 TO 23 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............7785 FT AGL.
* TRANSPORT WINDS..........SOUTH 9 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (70065 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
FRIDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 55 TO 65. HIGHS 72 TO 82. LIGHT WINDS.
MINIMUM HUMIDITY 44 TO 54 PCT.
SATURDAY
MOSTLY CLEAR. LOWS 56 TO 66. HIGHS 73 TO 83. LIGHT
WINDS. MINIMUM HUMIDITY 37 TO 47 PCT.
SUNDAY
MOSTLY CLEAR. LOWS 55 TO 65. HIGHS 71 TO 81. LIGHT
WINDS. MINIMUM HUMIDITY 33 TO 43 PCT.
MONDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 55 TO 65. HIGHS 71 TO 81.
TUESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 54 TO 64. HIGHS 70 TO 80.
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE
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