120
FNUS55 KTWC 200850
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
150 AM MST THU NOV 20 2025
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
A STORM SYSTEM WILL CONTINUE TO IMPACT SOUTHEAST
ARIZONA THIS MORNING WITH NUMEROUS SHOWERS, ISOLATED THUNDERSTORMS,
SNOWFALL TO THE MOUNTAINS ABOVE 7000 FEET AND WELL BELOW NORMAL
TEMPERATURES. MINIMUM RH VALUES WILL BE WELL ABOVE CRITICAL LEVELS
INTO THIS WEEKEND BETWEEN 35-45 PERCENT IN THE VALLEYS AND 65-75+
PERCENT IN THE MOUNTAINS. MINIMUM RH VALUES THEN DECREASE TO 25-35
PERCENT IN THE VALLEYS AND 35-50 PERCENT IN THE MOUNATINS.
AZZ150-210000-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
150 AM MST THU NOV 20 2025
TODAY
* SKY/WEATHER..............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..........55 TO 65 DEGS.
24 HR TREND...........DOWN 3 TO 7 DEGS.
* MIN HUMIDITY.............48 TO 58 PCT.
24 HR TREND...........DOWN 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH.
* 10000 FT MSL WIND........WEST 15 TO 20 MPH.
* MIXING HEIGHT............5511 FT AGL.
* TRANSPORT WINDS..........WEST 12 KNOTS.
* VENTILATION CATEGORY.....GOOD (66132 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........40 TO 50 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MAX HUMIDITY.............79 TO 89 PCT.
24 HR TREND...........DOWN 9 TO 13 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.
FRIDAY
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT). SLIGHT CHANCE
OF SHOWERS.
* CHANCE OF PRECIP.........20 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........58 TO 68 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............43 TO 53 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTH 25 TO 30 MPH.
* MIXING HEIGHT............4671 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 17 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (79407 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
SATURDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 43 TO 53. HIGHS 56 TO 66. LIGHT WINDS.
MINIMUM HUMIDITY 55 TO 65 PCT.
SUNDAY
PARTLY CLOUDY. CHANCE OF SHOWERS. LOWS 41 TO 51. HIGHS
56 TO 66. LIGHT WINDS. MINIMUM HUMIDITY 53 TO 63 PCT.
MONDAY
MOSTLY CLEAR. LOWS 39 TO 49. HIGHS 59 TO 69. LIGHT
WINDS. MINIMUM HUMIDITY 46 TO 56 PCT.
TUESDAY
MOSTLY CLEAR. LOWS 39 TO 49. HIGHS 63 TO 73.
WEDNESDAY
MOSTLY CLEAR. LOWS 40 TO 50. 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)
AZZ151-210000-
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-
150 AM MST THU NOV 20 2025
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT) THEN BECOMING
PARTLY CLOUDY (45-55 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........50 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........49 TO 59 DEGS.
24 HR TREND...........DOWN 6 TO 10 DEGS.
* MIN HUMIDITY.............55 TO 65 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........WEST 20 TO 25 MPH.
* MIXING HEIGHT............5117 FT AGL.
* TRANSPORT WINDS..........WEST 16 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (81872 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........31 TO 41 DEGS.
24 HR TREND...........DOWN 3 TO 6 DEGS.
* MAX HUMIDITY.............82 TO 92 PCT.
24 HR TREND...........DOWN 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH SHIFTING TO THE
SOUTHEAST AFTER MIDNIGHT.
* 10000 FT MSL WIND........WEST 15 TO 20 MPH.
FRIDAY
* SKY/WEATHER..............MOSTLY CLOUDY (50-60 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........56 TO 66 DEGS.
24 HR TREND...........UP 4 TO 8 DEGS.
* MIN HUMIDITY.............36 TO 46 PCT.
24 HR TREND...........DOWN 18 TO 22 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 20 TO 25 MPH.
* MIXING HEIGHT............4488 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 15 TO 16 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (71808 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
SATURDAY
SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS.
LOWS 37 TO 47. HIGHS 55 TO 65. SOUTHEAST WIND AROUND 15 MPH.
MINIMUM HUMIDITY 50 TO 60 PCT.
SUNDAY
PARTLY CLOUDY. CHANCE OF SHOWERS. LOWS 34 TO 44. HIGHS
51 TO 61. LIGHT WINDS. MINIMUM HUMIDITY 56 TO 66 PCT.
MONDAY
MOSTLY CLEAR. LOWS 32 TO 42. HIGHS 56 TO 66. LIGHT
WINDS. MINIMUM HUMIDITY 45 TO 55 PCT.
TUESDAY
MOSTLY CLEAR. LOWS 33 TO 43. HIGHS 62 TO 72.
WEDNESDAY
MOSTLY CLEAR. LOWS 35 TO 45. HIGHS 63 TO 73.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-210000-
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-
150 AM MST THU NOV 20 2025
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (50-60 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........60 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........49 TO 59 DEGS.
24 HR TREND...........DOWN 8 TO 12 DEGS.
* MIN HUMIDITY.............64 TO 74 PCT.
24 HR TREND...........UP 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..WEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 30 MPH BECOMING WEST
AROUND 20 MPH IN THE AFTERNOON.
* MIXING HEIGHT............3617 FT AGL.
* TRANSPORT WINDS..........WEST 18 KNOTS.
* VENTILATION CATEGORY.....GOOD (65106 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........29 TO 39 DEGS.
24 HR TREND...........DOWN 6 TO 10 DEGS.
* MAX HUMIDITY.............82 TO 92 PCT.
24 HR TREND...........DOWN 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..WEST AROUND 10 MPH IN THE EVENING
BECOMING LIGHT.
* 10000 FT MSL WIND........WEST 15 TO 20 MPH.
FRIDAY
* SKY/WEATHER..............PARTLY CLOUDY (45-55 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........54 TO 64 DEGS.
24 HR TREND...........UP 3 TO 7 DEGS.
* MIN HUMIDITY.............43 TO 53 PCT.
24 HR TREND...........DOWN 17 TO 21 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 20 TO 25 MPH.
* MIXING HEIGHT............4745 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 11 TO 14 KNOTS.
* VENTILATION CATEGORY.....GOOD (66430 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
SATURDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 35 TO 45. HIGHS 55 TO 65. SOUTHEAST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 42 TO 52 PCT.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS 34 TO 44. HIGHS
50 TO 60. LIGHT WINDS. MINIMUM HUMIDITY 56 TO 66 PCT.
MONDAY
MOSTLY CLEAR. LOWS 31 TO 41. HIGHS 55 TO 65. LIGHT
WINDS. MINIMUM HUMIDITY 44 TO 54 PCT.
TUESDAY
MOSTLY CLEAR. LOWS 32 TO 42. HIGHS 59 TO 69.
WEDNESDAY
MOSTLY CLEAR. LOWS 33 TO 43. HIGHS 59 TO 69.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-210000-
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-
150 AM MST THU NOV 20 2025
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (55-65 PCT). SHOWERS WITH
POSSIBLE SNOW SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........80 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........38 TO 48 DEGS.
24 HR TREND...........DOWN 6 TO 10 DEGS.
* MIN HUMIDITY.............75 TO 85 PCT.
24 HR TREND...........UP 8 TO 12 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 15 TO 20 MPH.
* MIXING HEIGHT............2757 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 14 TO 15 KNOTS.
* VENTILATION CATEGORY.....GOOD (41355 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (45-55 PCT) THEN BECOMING
PARTLY CLOUDY (35-45 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........24 TO 34 DEGS.
24 HR TREND...........DOWN 6 TO 10 DEGS.
* MAX HUMIDITY.............82 TO 92 PCT.
24 HR TREND...........DOWN 4 TO 8 PCT.
* WIND (20 FT/10-MIN AVG)..WEST AROUND 10 MPH IN THE EVENING
BECOMING LIGHT.
* 10000 FT MSL WIND........WEST 10 TO 15 MPH.
FRIDAY
* SKY/WEATHER..............MOSTLY CLOUDY (55-65 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........43 TO 53 DEGS.
24 HR TREND...........UP 3 TO 7 DEGS.
* MIN HUMIDITY.............42 TO 52 PCT.
24 HR TREND...........DOWN 29 TO 33 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........SOUTHWEST 10 TO 15 MPH.
* MIXING HEIGHT............2782 FT AGL.
* TRANSPORT WINDS..........EAST 10 KNOTS SHIFTING TO THE SOUTHEAST
IN THE AFTERNOON.
* VENTILATION CATEGORY.....FAIR (27820 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
SATURDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 31 TO 41. HIGHS 46 TO 56. EAST WIND AROUND
15 MPH. MINIMUM HUMIDITY 43 TO 53 PCT.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS
30 TO 40. HIGHS 39 TO 49. LIGHT WINDS. MINIMUM HUMIDITY 71 TO
81 PCT.
MONDAY
MOSTLY CLEAR. LOWS 27 TO 37. HIGHS 48 TO 58. LIGHT
WINDS. MINIMUM HUMIDITY 43 TO 53 PCT.
TUESDAY
MOSTLY CLEAR. LOWS 27 TO 37. HIGHS 51 TO 61.
WEDNESDAY
MOSTLY CLEAR. LOWS 27 TO 37. HIGHS 51 TO 61.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-210000-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
150 AM MST THU NOV 20 2025
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (50-60 PCT). CHANCE OF
SHOWERS, SNOW SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS.
* CHANCE OF PRECIP.........50 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........39 TO 49 DEGS.
24 HR TREND...........DOWN 7 TO 11 DEGS.
* MIN HUMIDITY.............65 TO 75 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 15 TO 20 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 30 MPH BECOMING WEST
AROUND 20 MPH IN THE AFTERNOON.
* MIXING HEIGHT............4538 FT AGL.
* TRANSPORT WINDS..........WEST 19 TO 20 KNOTS.
* VENTILATION CATEGORY.....VERY GOOD (88491 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........28 TO 38 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MAX HUMIDITY.............82 TO 92 PCT.
24 HR TREND...........DOWN 7 TO 11 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 15 MPH SHIFTING TO THE
SOUTH AFTER MIDNIGHT.
* 10000 FT MSL WIND........WEST 15 TO 20 MPH.
FRIDAY
* SKY/WEATHER..............PARTLY CLOUDY (45-55 PCT) THEN BECOMING
MOSTLY CLOUDY (45-55 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........46 TO 56 DEGS.
24 HR TREND...........UP 3 TO 7 DEGS.
* MIN HUMIDITY.............46 TO 56 PCT.
24 HR TREND...........DOWN 23 TO 27 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 20 TO 25 MPH.
* MIXING HEIGHT............4298 FT AGL.
* TRANSPORT WINDS..........SOUTH 13 TO 16 KNOTS.
* VENTILATION CATEGORY.....GOOD (62321 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
SATURDAY
SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS.
LOWS 35 TO 45. HIGHS 46 TO 56. SOUTHEAST WIND AROUND 15 MPH.
MINIMUM HUMIDITY 50 TO 60 PCT.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS 32 TO 42. HIGHS
41 TO 51. LIGHT WINDS. MINIMUM HUMIDITY 67 TO 77 PCT.
MONDAY
MOSTLY CLEAR. LOWS 29 TO 39. HIGHS 47 TO 57. LIGHT
WINDS. MINIMUM HUMIDITY 52 TO 62 PCT.
TUESDAY
MOSTLY CLEAR. LOWS 31 TO 41. HIGHS 53 TO 63.
WEDNESDAY
MOSTLY CLEAR. LOWS 33 TO 43. HIGHS 53 TO 63.
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE
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