985
FNUS55 KTWC 190936
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
236 AM MST FRI DEC 19 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 MODEST
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, INCREASING HUMIDITY VALUES TO 25 TO 40 PERCENT
AND BRING SLIGHT CHANCES FOR SHOWERS STARTING TUESDAY NIGHT.
AZZ150-192345-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
236 AM MST FRI DEC 19 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........76 TO 86 DEGS.
24 HR TREND...........UP 3 TO 6 DEGS.
* MIN HUMIDITY.............14 TO 24 PCT.
24 HR TREND...........DOWN 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..EAST AROUND 10 MPH IN THE MORNING
BECOMING LIGHT.
* 10000 FT MSL WIND........WEST 15 TO 20 MPH.
* MIXING HEIGHT............3384 FT AGL.
* TRANSPORT WINDS..........EAST 8 KNOTS SHIFTING TO THE SOUTHWEST
IN THE AFTERNOON.
* VENTILATION CATEGORY.....FAIR (27072 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.............43 TO 53 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH.
* 10000 FT MSL WIND........WEST 25 TO 30 MPH.
SATURDAY
* 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 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........WEST 30 TO 35 MPH.
* MIXING HEIGHT............3595 FT AGL.
* TRANSPORT WINDS..........SOUTH 10 KNOTS SHIFTING TO THE SOUTHWEST
IN THE AFTERNOON.
* VENTILATION CATEGORY.....FAIR (35950 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
SUNDAY
MOSTLY CLEAR. LOWS 46 TO 56. HIGHS 75 TO 85. LIGHT
WINDS. MINIMUM HUMIDITY 14 TO 24 PCT.
MONDAY
MOSTLY CLEAR. LOWS 46 TO 56. HIGHS 76 TO 86. LIGHT
WINDS. MINIMUM HUMIDITY 12 TO 22 PCT.
TUESDAY
MOSTLY CLOUDY. LOWS 49 TO 59. HIGHS 73 TO 83. LIGHT
WINDS. MINIMUM HUMIDITY 15 TO 25 PCT.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 51 TO
61. HIGHS 70 TO 80.
CHRISTMAS DAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS
50 TO 60. HIGHS 69 TO 79.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-192345-
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-
236 AM MST FRI DEC 19 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........73 TO 83 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MIN HUMIDITY.............14 TO 24 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........NORTHWEST 15 TO 20 MPH.
* MIXING HEIGHT............4960 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 7 KNOTS SHIFTING TO THE WEST
IN THE AFTERNOON.
* VENTILATION CATEGORY.....GOOD (59520 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (10-20 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...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH.
* 10000 FT MSL WIND........WEST 25 TO 30 MPH.
SATURDAY
* 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.............13 TO 23 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........WEST 30 TO 35 MPH.
* MIXING HEIGHT............4120 FT AGL.
* TRANSPORT WINDS..........SOUTH 10 KNOTS SHIFTING TO THE WEST 14
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....GOOD (57680 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
SUNDAY
MOSTLY CLEAR. LOWS 42 TO 52. HIGHS 72 TO 82. LIGHT
WINDS. MINIMUM HUMIDITY 12 TO 22 PCT.
MONDAY
MOSTLY CLEAR. LOWS 42 TO 52. HIGHS 73 TO 83. LIGHT
WINDS. MINIMUM HUMIDITY 11 TO 20 PCT.
TUESDAY
MOSTLY CLOUDY. LOWS 45 TO 55. HIGHS 70 TO 80. LIGHT
WINDS. MINIMUM HUMIDITY 13 TO 21 PCT.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 45 TO
55. HIGHS 66 TO 76.
CHRISTMAS DAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS
44 TO 54. HIGHS 67 TO 77.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-192345-
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-
236 AM MST FRI DEC 19 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........69 TO 79 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............16 TO 26 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........NORTHWEST 20 TO 25 MPH.
* MIXING HEIGHT............3511 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 6 KNOTS SHIFTING TO THE WEST
IN THE AFTERNOON.
* VENTILATION CATEGORY.....FAIR (38621 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.............47 TO 57 PCT.
24 HR TREND...........UP 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........WEST 30 TO 35 MPH.
SATURDAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 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.............15 TO 25 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............3695 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 8 TO 16 KNOTS.
* VENTILATION CATEGORY.....GOOD (59120 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
SUNDAY
MOSTLY CLEAR. LOWS 38 TO 48. HIGHS 68 TO 78. LIGHT
WINDS. MINIMUM HUMIDITY 14 TO 23 PCT.
MONDAY
MOSTLY CLEAR. LOWS 38 TO 48. HIGHS 69 TO 79. LIGHT
WINDS. MINIMUM HUMIDITY 13 TO 23 PCT.
TUESDAY
MOSTLY CLOUDY. LOWS 41 TO 51. HIGHS 67 TO 77. LIGHT
WINDS. MINIMUM HUMIDITY 14 TO 21 PCT.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 42 TO
52. HIGHS 64 TO 74.
CHRISTMAS DAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS
42 TO 52. HIGHS 65 TO 75.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-192345-
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-
236 AM MST FRI DEC 19 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...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............16 TO 25 PCT.
24 HR TREND...........UP 1 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST AROUND 10 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........WEST 25 TO 30 MPH.
* MIXING HEIGHT............3886 FT AGL.
* TRANSPORT WINDS..........NORTH 8 KNOTS INCREASING TO WEST 19
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....VERY GOOD (73834 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........36 TO 46 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............38 TO 48 PCT.
24 HR TREND...........DOWN 4 TO 8 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST AROUND 10 MPH.
* 10000 FT MSL WIND........WEST 40 TO 45 MPH.
SATURDAY
* SKY/WEATHER..............MOSTLY SUNNY (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........58 TO 68 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............16 TO 26 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..WEST AROUND 10 MPH.
* 10000 FT MSL WIND........WEST 30 TO 35 MPH.
* MIXING HEIGHT............3517 FT AGL.
* TRANSPORT WINDS..........WEST 13 TO 20 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (70340 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
SUNDAY
MOSTLY CLEAR. LOWS 35 TO 45. HIGHS 60 TO 70. LIGHT
WINDS. MINIMUM HUMIDITY 18 TO 28 PCT.
MONDAY
MOSTLY CLEAR. LOWS 35 TO 45. HIGHS 62 TO 72. LIGHT
WINDS. MINIMUM HUMIDITY 13 TO 22 PCT.
TUESDAY
MOSTLY CLOUDY. LOWS 37 TO 47. HIGHS 59 TO 69. LIGHT
WINDS. MINIMUM HUMIDITY 14 TO 21 PCT.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 38 TO 48. HIGHS 53 TO 63.
CHRISTMAS DAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 38 TO 48. HIGHS 54 TO 64.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-192345-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
236 AM MST FRI DEC 19 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........64 TO 74 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MIN HUMIDITY.............16 TO 26 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH SHIFTING TO THE
WEST IN THE AFTERNOON.
* 10000 FT MSL WIND........NORTHWEST 15 TO 20 MPH.
* MIXING HEIGHT............4464 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 6 KNOTS SHIFTING TO THE WEST
13 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....GOOD (58032 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (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.............33 TO 43 PCT.
24 HR TREND...........UP 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..WEST AROUND 10 MPH.
* 10000 FT MSL WIND........WEST 30 TO 35 MPH.
SATURDAY
* SKY/WEATHER..............MOSTLY SUNNY (5-15 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........61 TO 71 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............15 TO 25 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH.
* 10000 FT MSL WIND........WEST 30 TO 35 MPH.
* MIXING HEIGHT............3937 FT AGL.
* TRANSPORT WINDS..........WEST 13 TO 18 KNOTS.
* VENTILATION CATEGORY.....GOOD (61023 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
SUNDAY
MOSTLY CLEAR. LOWS 41 TO 51. HIGHS 62 TO 72. LIGHT
WINDS. MINIMUM HUMIDITY 15 TO 25 PCT.
MONDAY
MOSTLY CLEAR. LOWS 40 TO 50. HIGHS 63 TO 73. LIGHT
WINDS. MINIMUM HUMIDITY 14 TO 24 PCT.
TUESDAY
MOSTLY CLOUDY. LOWS 43 TO 53. HIGHS 61 TO 71. LIGHT
WINDS. MINIMUM HUMIDITY 13 TO 23 PCT.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 44 TO
54. HIGHS 57 TO 67.
CHRISTMAS DAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS
42 TO 52. HIGHS 58 TO 68.
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
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page