532
FNUS55 KTWC 210823
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
123 AM MST TUE APR 21 2026
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
WARM AND DRY INTO THE WEEKEND. MINIMUM RHS WILL
GENERALLY BE IN THE 10-20 PERCENT AREAWIDE THROUGH SATURDAY,
THEN INCREASE TO 10-25 PERCENT IN THE VALLEYS AND 25-35 PERCENT
IN MOUNTAINS SUNDAY AS WEATHER DISTURBANCE MOVES INTO THE AREA.
PASSING SYSTEMS TO THE NORTH THIS WEEK WILL KEEP SOUTHEAST
ARIZONA DRY, WITH BREEZY WEST WINDS THE SECOND HALF OF THE WEEK
INTO NEXT WEEKEND. THERE IS A 20-40 PERCENT PROBABILITY THAT
AREAS TUCSON EASTWARD WILL REACH ELEVATED TO NEAR CRITICAL FIRE
WEATHER CONDITIONS WEDNESDAY, WITH ELEVATED TO NEAR CRITICAL
CONDITIONS PERSISTING THROUGH THE SATURDAY.
AZZ150-212215-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
123 AM MST TUE APR 21 2026
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT) THEN BECOMING
MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........84 TO 94 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............8 TO 16 PCT.
24 HR TREND...........UP 1 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH WITH GUSTS TO 25
MPH.
* 10000 FT MSL WIND........SOUTH 20 TO 25 MPH.
* MIXING HEIGHT............11971 FT AGL.
* TRANSPORT WINDS..........SOUTH 17 TO 18 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (215478 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........50 TO 60 DEGS.
24 HR TREND...........DOWN 4 TO 8 DEGS.
* MAX HUMIDITY.............33 TO 43 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 20 TO 25 MPH.
WEDNESDAY
* SKY/WEATHER..............MOSTLY SUNNY (10-20 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........80 TO 90 DEGS.
24 HR TREND...........DOWN 4 TO 8 DEGS.
* MIN HUMIDITY.............9 TO 18 PCT.
24 HR TREND...........UP 1 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST TO WEST 10 TO 15 MPH WITH
GUSTS TO 30 MPH.
* 10000 FT MSL WIND........SOUTHWEST 20 TO 25 MPH.
* MIXING HEIGHT............10574 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 10 TO 16 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (169184 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
MOSTLY CLEAR. LOWS 50 TO 60. HIGHS 79 TO 89.
SOUTHWEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 9 TO 14 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 50 TO 60. HIGHS 81 TO 91. SOUTHWEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 8 TO 16 PCT.
SATURDAY
PARTLY CLOUDY. LOWS 52 TO 62. HIGHS 79 TO 89. SOUTH
WIND AROUND 20 MPH. MINIMUM HUMIDITY 13 TO 23 PCT.
SUNDAY
MOSTLY CLEAR. LOWS 49 TO 59. HIGHS 73 TO 83.
MONDAY
CLEAR. LOWS 46 TO 56. HIGHS 78 TO 88.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-212215-
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-
123 AM MST TUE APR 21 2026
..ELEVATED TO NEAR CRITICAL FIRE WEATHER CONDITIONS WEDNESDAY
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (45-55 PCT) THEN BECOMING
MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........79 TO 89 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............11 TO 19 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH WITH GUSTS TO
20-25 MPH.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
* MIXING HEIGHT............9264 FT AGL.
* TRANSPORT WINDS..........SOUTH 15 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (138960 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........45 TO 55 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MAX HUMIDITY.............38 TO 48 PCT.
24 HR TREND...........DOWN 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 15 MPH INCREASING TO
AROUND 25 MPH AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........76 TO 86 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............10 TO 17 PCT.
24 HR TREND...........DOWN 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 15 TO 20 MPH WITH GUSTS TO 35
MPH.
* 10000 FT MSL WIND........SOUTHWEST 20 TO 25 MPH.
* MIXING HEIGHT............8243 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 14 TO 20 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (164860 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
MOSTLY CLEAR. LOWS 43 TO 53. HIGHS 74 TO 84.
SOUTHWEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 10 TO 16 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 44 TO 54. HIGHS 76 TO 86. SOUTHWEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 9 TO 16 PCT.
SATURDAY
PARTLY CLOUDY. LOWS 45 TO 55. HIGHS 75 TO 85.
SOUTHWEST WIND AROUND 20 MPH. MINIMUM HUMIDITY 12 TO 20 PCT.
SUNDAY
MOSTLY CLEAR. LOWS 44 TO 54. HIGHS 69 TO 79.
MONDAY
MOSTLY CLEAR. LOWS 39 TO 49. HIGHS 74 TO 84.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-212215-
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-
123 AM MST TUE APR 21 2026
..ELEVATED TO NEAR CRITICAL FIRE WEATHER CONDITIONS WEDNESDAY
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT) THEN BECOMING
MOSTLY SUNNY (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........79 TO 89 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............9 TO 18 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH WITH GUSTS TO
20-25 MPH.
* 10000 FT MSL WIND........SOUTHWEST 10 TO 15 MPH.
* MIXING HEIGHT............11254 FT AGL.
* TRANSPORT WINDS..........SOUTH 11 TO 14 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (157556 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........46 TO 56 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............36 TO 46 PCT.
24 HR TREND...........DOWN 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..WEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 15 MPH INCREASING TO
AROUND 25 MPH AFTER MIDNIGHT.
WEDNESDAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........77 TO 87 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............8 TO 17 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 15 TO 20 MPH WITH GUSTS TO 35
MPH.
* 10000 FT MSL WIND........SOUTHWEST 25 TO 30 MPH.
* MIXING HEIGHT............10170 FT AGL.
* TRANSPORT WINDS..........WEST 14 TO 22 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (223740 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
MOSTLY CLEAR. LOWS 44 TO 54. HIGHS 74 TO 84. WEST
WIND AROUND 20 MPH. MINIMUM HUMIDITY 9 TO 16 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 42 TO 52. HIGHS 76 TO 86. WEST WIND
AROUND 20 MPH. MINIMUM HUMIDITY 8 TO 15 PCT.
SATURDAY
PARTLY CLOUDY. LOWS 44 TO 54. HIGHS 75 TO 85.
SOUTHWEST WIND AROUND 20 MPH. MINIMUM HUMIDITY 10 TO 18 PCT.
SUNDAY
MOSTLY CLEAR. LOWS 44 TO 54. HIGHS 71 TO 81.
MONDAY
MOSTLY CLEAR. LOWS 40 TO 50. HIGHS 73 TO 83.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-212215-
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-
123 AM MST TUE APR 21 2026
..ELEVATED TO NEAR CRITICAL FIRE WEATHER CONDITIONS WEDNESDAY
TODAY
* 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...........UP 3 TO 6 DEGS.
* MIN HUMIDITY.............11 TO 20 PCT.
24 HR TREND...........DOWN 4 TO 8 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10-15 MPH WITH GUSTS TO 20-25
MPH.
* 10000 FT MSL WIND........SOUTHWEST 15 TO 20.
* MIXING HEIGHT............10366 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 11 KNOTS SHIFTING TO THE SOUTH
15 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (155490 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........41 TO 51 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MAX HUMIDITY.............31 TO 41 PCT.
24 HR TREND...........DOWN 8 TO 12 PCT.
* WIND (20 FT/10-MIN AVG)..WEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 20 TO 25 MPH.
WEDNESDAY
* 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...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............10 TO 18 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 15 TO 20 MPH WITH GUSTS TO 35
MPH.
* 10000 FT MSL WIND........SOUTHWEST 25 TO 30 MPH.
* MIXING HEIGHT............7375 FT AGL.
* TRANSPORT WINDS..........WEST 20 TO 26 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (191750 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
MOSTLY CLEAR. LOWS 38 TO 48. HIGHS 62 TO 72. WEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 9 TO 16 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 36 TO 46. HIGHS 63 TO 73. WEST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 10 TO 16 PCT.
SATURDAY
PARTLY CLOUDY. LOWS 39 TO 49. HIGHS 63 TO 73. WEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 12 TO 21 PCT.
SUNDAY
MOSTLY CLEAR. LOWS 38 TO 48. HIGHS 58 TO 68.
MONDAY
CLEAR. LOWS 34 TO 44. HIGHS 63 TO 73.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-212215-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
123 AM MST TUE APR 21 2026
..ELEVATED TO NEAR CRITICAL FIRE WEATHER CONDITIONS WEDNESDAY
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (45-55 PCT) THEN BECOMING
MOSTLY SUNNY (20-30 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.............12 TO 22 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH WITH GUSTS TO 25
MPH.
* 10000 FT MSL WIND........SOUTHWEST 15 TO 20 MPH.
* MIXING HEIGHT............11343 FT AGL.
* TRANSPORT WINDS..........SOUTH 14 TO 15 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (164473 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........44 TO 54 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MAX HUMIDITY.............38 TO 48 PCT.
24 HR TREND...........UP 4 TO 8 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 15 MPH INCREASING TO
AROUND 25 MPH AFTER MIDNIGHT.
WEDNESDAY
* 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.............10 TO 19 PCT.
24 HR TREND...........DOWN 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 15 TO 20 MPH WITH GUSTS TO 35
MPH.
* 10000 FT MSL WIND........SOUTHWEST 20 TO 25 MPH.
* MIXING HEIGHT............10249 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 16 TO 22 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (194731 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
THURSDAY
MOSTLY CLEAR. LOWS 41 TO 51. HIGHS 65 TO 75. WEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 10 TO 20 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 41 TO 51. HIGHS 66 TO 76. SOUTHWEST
WIND AROUND 20 MPH. MINIMUM HUMIDITY 10 TO 18 PCT.
SATURDAY
PARTLY CLOUDY. LOWS 42 TO 52. HIGHS 66 TO 76.
SOUTHWEST WIND AROUND 20 MPH. MINIMUM HUMIDITY 12 TO 21 PCT.
SUNDAY
MOSTLY CLEAR. LOWS 42 TO 52. HIGHS 62 TO 72.
MONDAY
MOSTLY CLEAR. LOWS 37 TO 47. HIGHS 65 TO 75.
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE
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