092
FNUS55 KTWC 200926
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
226 AM MST SAT DEC 20 2025
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
WARM AND DRY CONDITIONS CONTINUE INTO EARLY NEXT
WEEK. HIGHS 15 TO 20 DEGREES ABOVE NORMAL THROUGH MONDAY WITH
GRADUAL COOLING MID TO LATE NEXT WEEK. MINIMUM RELATIVE HUMIDITY
VALUES OF 12-22 PERCENT EACH DAY THROUGH EARLY NEXT WEEK. 20-FOOT
WINDS LESS THAN 15 MPH AND TERRAIN DRIVEN. A PACIFIC SYSTEM
APPROACHES THE MIDDLE OF NEXT WEEK WITH BROAD BRUSHED 10 TO 30
PERCENT SHOWER CHANCES TUESDAY NIGHT INTO FRIDAY WITH INCREASING
HUMIDITY VALUES TO 25 TO 40 PERCENT.
AZZ150-202215-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
226 AM MST SAT DEC 20 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (5-15 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........74 TO 84 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............15 TO 25 PCT.
24 HR TREND...........UP 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........WEST 25 TO 30 MPH.
* MIXING HEIGHT............4671 FT AGL.
* TRANSPORT WINDS..........SOUTH 11 KNOTS SHIFTING TO THE SOUTHWEST
10 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....GOOD (46710 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........46 TO 56 DEGS.
24 HR TREND...........UP 1 DEG.
* MAX HUMIDITY.............47 TO 57 PCT.
24 HR TREND...........UP 1 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTHEAST AROUND 10
MPH AFTER MIDNIGHT.
* 10000 FT MSL WIND........WEST 20 TO 25 MPH.
SUNDAY
* SKY/WEATHER..............MOSTLY SUNNY (10-20 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........75 TO 85 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 IN THE MORNING
BECOMING LIGHT.
* 10000 FT MSL WIND........WEST 15 TO 20 MPH.
* MIXING HEIGHT............2414 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 8 KNOTS SHIFTING TO THE
SOUTHWEST 5 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....MARGINAL (12070 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
MONDAY
PARTLY CLOUDY. LOWS 45 TO 55. HIGHS 76 TO 86. LIGHT
WINDS. MINIMUM HUMIDITY 12 TO 22 PCT.
TUESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 48 TO
58. HIGHS 73 TO 83. LIGHT WINDS. MINIMUM HUMIDITY 14 TO 24 PCT.
WEDNESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 52 TO
62. HIGHS 71 TO 81. LIGHT WINDS. MINIMUM HUMIDITY 32 TO 42 PCT.
CHRISTMAS DAY
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS 52 TO 62.
HIGHS 70 TO 80.
FRIDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 49 TO 59.
HIGHS 65 TO 75.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-202215-
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-
226 AM MST SAT DEC 20 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (5-15 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........71 TO 81 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............15 TO 25 PCT.
24 HR TREND...........UP 1 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH SHIFTING TO THE WEST
IN THE AFTERNOON.
* 10000 FT MSL WIND........WEST 25 TO 30 MPH.
* MIXING HEIGHT............4357 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 10 TO 15 KNOTS.
* VENTILATION CATEGORY.....GOOD (65355 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........42 TO 52 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............42 TO 52 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTHEAST AROUND 10
MPH AFTER MIDNIGHT.
* 10000 FT MSL WIND........WEST 15 TO 20 MPH.
SUNDAY
* SKY/WEATHER..............MOSTLY SUNNY (10-20 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........72 TO 82 DEGS.
24 HR TREND...........UP 1 DEG.
* MIN HUMIDITY.............13 TO 23 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH IN THE MORNING
BECOMING LIGHT.
* 10000 FT MSL WIND........WEST 15 TO 20 MPH.
* MIXING HEIGHT............4015 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 7 KNOTS SHIFTING TO THE
SOUTHWEST 6 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....FAIR (24090 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
MONDAY
MOSTLY CLEAR. LOWS 42 TO 52. HIGHS 74 TO 84. LIGHT
WINDS. MINIMUM HUMIDITY 11 TO 21 PCT.
TUESDAY
MOSTLY CLOUDY. LOWS 44 TO 54. HIGHS 70 TO 80. LIGHT
WINDS. MINIMUM HUMIDITY 13 TO 22 PCT.
WEDNESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 46 TO
56. HIGHS 68 TO 78. LIGHT WINDS. MINIMUM HUMIDITY 31 TO 41 PCT.
CHRISTMAS DAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS
47 TO 57. HIGHS 67 TO 77.
FRIDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 44 TO 54.
HIGHS 64 TO 74.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-202215-
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-
226 AM MST SAT DEC 20 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (10-20 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........67 TO 77 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............17 TO 27 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING WEST AROUND 10 MPH
IN THE AFTERNOON.
* 10000 FT MSL WIND........WEST 35 TO 40 MPH.
* MIXING HEIGHT............4876 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 9 TO 17 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (82892 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........39 TO 49 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)..LIGHT WINDS.
* 10000 FT MSL WIND........WEST 20 TO 25 MPH.
SUNDAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........68 TO 78 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............16 TO 26 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........WEST 15 TO 20 MPH.
* MIXING HEIGHT............2933 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 6 KNOTS SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* VENTILATION CATEGORY.....MARGINAL (17598 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
MONDAY
MOSTLY CLEAR. LOWS 38 TO 48. HIGHS 69 TO 79. LIGHT
WINDS. MINIMUM HUMIDITY 13 TO 23 PCT.
TUESDAY
MOSTLY CLOUDY. LOWS 40 TO 50. HIGHS 68 TO 78. LIGHT
WINDS. MINIMUM HUMIDITY 14 TO 21 PCT.
WEDNESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 43 TO
53. HIGHS 66 TO 76. LIGHT WINDS. MINIMUM HUMIDITY 28 TO 38 PCT.
CHRISTMAS DAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS
44 TO 54. HIGHS 66 TO 76.
FRIDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 43 TO 53.
HIGHS 63 TO 73.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-202215-
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-
226 AM MST SAT DEC 20 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........58 TO 68 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............18 TO 28 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..WEST AROUND 10 MPH.
* 10000 FT MSL WIND........WEST AROUND 40 MPH DECREASING TO AROUND
30 MPH IN THE AFTERNOON.
* MIXING HEIGHT............3911 FT AGL.
* TRANSPORT WINDS..........WEST 15 TO 21 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (82131 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........36 TO 46 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............40 TO 50 PCT.
24 HR TREND...........UP 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST AROUND 10 MPH IN THE EVENING
BECOMING LIGHT.
* 10000 FT MSL WIND........WEST 20 TO 25 MPH.
SUNDAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........60 TO 70 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............18 TO 28 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........WEST 20 TO 25 MPH.
* MIXING HEIGHT............3780 FT AGL.
* TRANSPORT WINDS..........NORTH 8 KNOTS SHIFTING TO THE SOUTHWEST
IN THE AFTERNOON.
* VENTILATION CATEGORY.....GOOD (49140 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
MONDAY
MOSTLY CLEAR. LOWS 36 TO 46. HIGHS 62 TO 72. LIGHT
WINDS. MINIMUM HUMIDITY 15 TO 22 PCT.
TUESDAY
MOSTLY CLOUDY. LOWS 37 TO 47. HIGHS 59 TO 69. LIGHT
WINDS. MINIMUM HUMIDITY 13 TO 20 PCT.
WEDNESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 38 TO
48. HIGHS 55 TO 65. LIGHT WINDS. MINIMUM HUMIDITY 31 TO 41 PCT.
CHRISTMAS DAY
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS 40 TO 50.
HIGHS 55 TO 65.
FRIDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS 38 TO 48. HIGHS
52 TO 62.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-202215-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
226 AM MST SAT DEC 20 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........61 TO 71 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............17 TO 27 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..WEST AROUND 10 MPH.
* 10000 FT MSL WIND........WEST 30 TO 35 MPH.
* MIXING HEIGHT............5147 FT AGL.
* TRANSPORT WINDS..........WEST 14 TO 18 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (82352 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........42 TO 52 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............32 TO 42 PCT.
24 HR TREND...........DOWN 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..WEST AROUND 10 MPH.
* 10000 FT MSL WIND........WEST 20 TO 25 MPH.
SUNDAY
* SKY/WEATHER..............MOSTLY SUNNY (5-15 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........62 TO 72 DEGS.
24 HR TREND...........UP 1 DEG.
* MIN HUMIDITY.............15 TO 25 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH IN THE MORNING
BECOMING LIGHT.
* 10000 FT MSL WIND........WEST 15 TO 20 MPH.
* MIXING HEIGHT............4408 FT AGL.
* TRANSPORT WINDS..........SOUTH 7 KNOTS SHIFTING TO THE SOUTHWEST
8 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....FAIR (35264 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
MONDAY
MOSTLY CLEAR. LOWS 42 TO 52. HIGHS 64 TO 74. LIGHT
WINDS. MINIMUM HUMIDITY 14 TO 24 PCT.
TUESDAY
MOSTLY CLOUDY. LOWS 43 TO 53. HIGHS 61 TO 71. SOUTH
WIND AROUND 15 MPH. MINIMUM HUMIDITY 13 TO 23 PCT.
WEDNESDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 45 TO
55. HIGHS 59 TO 69. LIGHT WINDS. MINIMUM HUMIDITY 29 TO 39 PCT.
CHRISTMAS DAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS
44 TO 54. HIGHS 58 TO 68.
FRIDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 43 TO 53.
HIGHS 56 TO 66.
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE
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