421
FNUS55 KTWC 180742
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
1240 AM MST SUN JAN 18 2026
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
HIGH PRESSURE ALOFT WILL RESULT IN ABOVE NORMAL HIGH
TEMPERATURES AND DRY CONDITIONS THROUGH AT LEAST THE MIDDLE OF THE
WEEK. 20-FOOT WINDS WILL BE LESS THAN 15 MPH AND TERRAIN DRIVEN.
MINIMUM RHS WILL BE IN THE 12-20 PERCENT AT ALL ELEVATIONS THROUGH
MONDAY, WITH AN INCREASE OF 5-10 PERCENT ACROSS THE EASTERN HALF OF
SOUTHEAST ARIZONA TUESDAY THROUGH THURSDAY OF NEXT WEEK. A LOW
PRESSURE SYSTEM MOVING INTO SOUTHEAST ARIZONA FROM THE EASTERN
PACIFIC WILL RESULT IN A SLIGHT CHANCE OF VALLEY RAIN AND MOUNTAIN
SNOW ACROSS SOUTHEAST ARIZONA NEXT WEEKEND, ALONG WITH INCREASING
MINIMUM RHS.
AZZ150-182215-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
1240 AM MST SUN JAN 18 2026
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 DEG.
* MIN HUMIDITY.............10 TO 20 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..NORTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........NORTH 10 TO 15 MPH.
* MIXING HEIGHT............3083 FT AGL.
* TRANSPORT WINDS..........NORTHEAST 8 KNOTS.
* VENTILATION CATEGORY.....FAIR (24664 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........41 TO 51 DEGS.
24 HR TREND...........UP 1 DEG.
* MAX HUMIDITY.............34 TO 44 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........NORTHWEST 15 TO 20 MPH.
MARTIN LUTHER KING JR DAY
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........68 TO 78 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............11 TO 20 PCT.
24 HR TREND...........UP 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............3175 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 6 KNOTS SHIFTING TO THE
NORTHWEST IN THE AFTERNOON.
* VENTILATION CATEGORY.....MARGINAL (19050 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
TUESDAY
MOSTLY CLEAR. LOWS 39 TO 49. HIGHS 67 TO 77. LIGHT
WINDS. MINIMUM HUMIDITY 13 TO 23 PCT.
WEDNESDAY
MOSTLY CLEAR. LOWS 39 TO 49. HIGHS 67 TO 77. LIGHT
WINDS. MINIMUM HUMIDITY 12 TO 20 PCT.
THURSDAY
PARTLY CLOUDY. LOWS 39 TO 49. HIGHS 68 TO 78. LIGHT
WINDS. MINIMUM HUMIDITY 11 TO 19 PCT.
FRIDAY
PARTLY CLOUDY. LOWS 43 TO 53. HIGHS 65 TO 75.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 43 TO
53. HIGHS 63 TO 73.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-182215-
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-
1240 AM MST SUN JAN 18 2026
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 1 DEG.
* MIN HUMIDITY.............11 TO 21 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..EAST AROUND 10 MPH.
* 10000 FT MSL WIND........NORTH 10 TO 15 MPH.
* MIXING HEIGHT............2838 FT AGL.
* TRANSPORT WINDS..........EAST 6 TO 9 KNOTS.
* VENTILATION CATEGORY.....FAIR (25542 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........37 TO 47 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MAX HUMIDITY.............35 TO 45 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........NORTHWEST 10 TO 15 MPH.
MARTIN LUTHER KING JR DAY
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........65 TO 75 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............12 TO 22 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 20 TO 25 MPH.
* MIXING HEIGHT............3414 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 5 KNOTS SHIFTING TO THE WEST 8
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....FAIR (27312 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
TUESDAY
MOSTLY CLEAR. LOWS 35 TO 45. HIGHS 62 TO 72. LIGHT
WINDS. MINIMUM HUMIDITY 16 TO 26 PCT.
WEDNESDAY
MOSTLY CLEAR. LOWS 34 TO 44. HIGHS 63 TO 73. LIGHT
WINDS. MINIMUM HUMIDITY 12 TO 22 PCT.
THURSDAY
PARTLY CLOUDY. LOWS 35 TO 45. HIGHS 64 TO 74. LIGHT
WINDS. MINIMUM HUMIDITY 12 TO 22 PCT.
FRIDAY
PARTLY CLOUDY. LOWS 38 TO 48. HIGHS 60 TO 70.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 37 TO
47. HIGHS 57 TO 67.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-182215-
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-
1240 AM MST SUN JAN 18 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (10-20 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........58 TO 68 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............13 TO 23 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..EAST AROUND 10 MPH.
* 10000 FT MSL WIND........NORTHWEST 10 TO 15 MPH.
* MIXING HEIGHT............1957 FT AGL.
* TRANSPORT WINDS..........EAST 5 TO 7 KNOTS.
* VENTILATION CATEGORY.....MARGINAL (13699 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........33 TO 43 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MAX HUMIDITY.............39 TO 49 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........NORTHWEST AROUND 10 MPH INCREASING TO
WEST AROUND 20 MPH AFTER MIDNIGHT.
MARTIN LUTHER KING JR DAY
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........61 TO 71 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MIN HUMIDITY.............14 TO 24 PCT.
24 HR TREND...........UP 1 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........WEST 20 TO 25 MPH.
* MIXING HEIGHT............3242 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 4 KNOTS SHIFTING TO THE WEST 7
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....FAIR (22694 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
TUESDAY
MOSTLY CLEAR. LOWS 30 TO 40. HIGHS 56 TO 66. EAST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 19 TO 29 PCT.
WEDNESDAY
MOSTLY CLEAR. LOWS 30 TO 40. HIGHS 59 TO 69. LIGHT
WINDS. MINIMUM HUMIDITY 13 TO 23 PCT.
THURSDAY
PARTLY CLOUDY. LOWS 32 TO 42. HIGHS 60 TO 70. LIGHT
WINDS. MINIMUM HUMIDITY 14 TO 22 PCT.
FRIDAY
PARTLY CLOUDY. LOWS 35 TO 45. HIGHS 58 TO 68.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 35 TO
45. HIGHS 56 TO 66.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-182215-
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-
1240 AM MST SUN JAN 18 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (10-20 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........52 TO 62 DEGS.
24 HR TREND...........UP 3 TO 6 DEGS.
* MIN HUMIDITY.............15 TO 23 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........NORTHWEST 10 TO 15 MPH.
* MIXING HEIGHT............2601 FT AGL.
* TRANSPORT WINDS..........NORTHEAST 6 KNOTS SHIFTING TO THE WEST 5
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....MARGINAL (13005 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........31 TO 41 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MAX HUMIDITY.............35 TO 45 PCT.
24 HR TREND...........UP 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........NORTHWEST AROUND 15 MPH INCREASING TO
WEST AROUND 25 MPH AFTER MIDNIGHT.
MARTIN LUTHER KING JR DAY
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT) THEN BECOMING
MOSTLY SUNNY (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........53 TO 63 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............15 TO 22 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........WEST AROUND 30 MPH BECOMING NORTHWEST
AROUND 20 MPH IN THE AFTERNOON.
* MIXING HEIGHT............3255 FT AGL.
* TRANSPORT WINDS..........NORTH 7 KNOTS SHIFTING TO THE WEST IN
THE AFTERNOON.
* VENTILATION CATEGORY.....FAIR (39060 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
TUESDAY
MOSTLY CLEAR. LOWS 27 TO 37. HIGHS 50 TO 60. LIGHT
WINDS. MINIMUM HUMIDITY 19 TO 28 PCT.
WEDNESDAY
CLEAR. LOWS 26 TO 36. HIGHS 53 TO 63. LIGHT WINDS.
MINIMUM HUMIDITY 11 TO 21 PCT.
THURSDAY
PARTLY CLOUDY. LOWS 29 TO 39. HIGHS 52 TO 62. LIGHT
WINDS. MINIMUM HUMIDITY 13 TO 21 PCT.
FRIDAY
PARTLY CLOUDY. LOWS 31 TO 41. HIGHS 49 TO 59.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS. LOWS 30 TO 40. HIGHS 47 TO 57.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-182215-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
1240 AM MST SUN JAN 18 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (10-20 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........54 TO 64 DEGS.
24 HR TREND...........UP 1 DEG.
* MIN HUMIDITY.............14 TO 24 PCT.
24 HR TREND...........UP 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..EAST AROUND 10 MPH.
* 10000 FT MSL WIND........NORTHWEST 10 TO 15 MPH.
* MIXING HEIGHT............2899 FT AGL.
* TRANSPORT WINDS..........NORTHEAST 5 TO 9 KNOTS.
* VENTILATION CATEGORY.....FAIR (20293 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...........UP 2 TO 5 DEGS.
* MAX HUMIDITY.............27 TO 37 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS.
* 10000 FT MSL WIND........NORTHWEST 10 TO 15 MPH.
MARTIN LUTHER KING JR DAY
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........56 TO 66 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............13 TO 23 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 20 TO 25 MPH.
* MIXING HEIGHT............4118 FT AGL.
* TRANSPORT WINDS..........WEST 9 TO 14 KNOTS.
* VENTILATION CATEGORY.....GOOD (47357 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
TUESDAY
MOSTLY CLEAR. LOWS 32 TO 42. HIGHS 51 TO 61. EAST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 20 TO 30 PCT.
WEDNESDAY
MOSTLY CLEAR. LOWS 32 TO 42. HIGHS 53 TO 63. LIGHT
WINDS. MINIMUM HUMIDITY 15 TO 25 PCT.
THURSDAY
PARTLY CLOUDY. LOWS 33 TO 43. HIGHS 54 TO 64. LIGHT
WINDS. MINIMUM HUMIDITY 14 TO 24 PCT.
FRIDAY
PARTLY CLOUDY. LOWS 36 TO 46. HIGHS 51 TO 61.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS. LOWS 35 TO 45. HIGHS 48 TO 58.
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE
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