741
FNUS55 KTWC 041004
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
304 AM MST MON MAY 4 2026
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
A PACIFIC STORM SYSTEM WILL CONTINUE TO APPROACH THE REGION
TODAY, INCREASING SOUTHWESTERLY WINDS THIS AFTERNOON TO 15-20
MPH WITH GUSTS TO 35 MPH. AS THE SYSTEM CROSSES ON TUESDAY WINDS
WILL INCREASE TO 18-25 MPH WITH GUSTS UP TO 40 MPH, ESPECIALLY
FROM SANTA CRUZ EASTWARD THROUGH SOUTHERN COCHISE COUNTY.
MOISTURE WILL INCREASE WITH INCOMING CHANCES FOR SHOWERS AND A
FEW THUNDERSTORMS FROM THIS EVENING THROUGH TUESDAY. MINIMUM
RELATIVE HUMIDITY IN THE VALLEYS TODAY WILL BE 15-20 PERCENT AND
20-30 PERCENT IN THE MOUNTAINS, INCREASING TO ABOVE 20 PERCENT
IN THE VALLEYS AND ABOVE 30 PERCENT IN THE MOUNTAINS ON TUESDAY.
TEMPERATURES 4-10 DEGREES BELOW NORMAL ARRIVE WITH THIS SYSTEM
TUESDAY AND WEDNESDAY. RELATIVE HUMIDITY QUICKLY DRIES OUT THE
SECOND HALF OF THE WEEK FROM WEDNESDAY ONWARDS. WELL ABOVE
NORMAL TEMPERATURES ARE EXPECTED BY THE WEEKEND.
AZZ150-042215-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
304 AM MST MON MAY 4 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (55-65 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........75 TO 85 DEGS.
24 HR TREND...........DOWN 9 TO 13 DEGS.
* MIN HUMIDITY.............21 TO 31 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 30 TO 35 MPH.
* MIXING HEIGHT............8529 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 17 TO 20 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (170580 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (55-65 PCT). CHANCE OF
SHOWERS.
* CHANCE OF PRECIP.........30 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........53 TO 63 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MAX HUMIDITY.............57 TO 67 PCT.
24 HR TREND...........UP 11 TO 15 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 25 MPH INCREASING TO
AROUND 35 MPH AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT). SLIGHT CHANCE
OF SHOWERS.
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........71 TO 81 DEGS.
24 HR TREND...........DOWN 4 TO 8 DEGS.
* MIN HUMIDITY.............21 TO 31 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 35 MPH DECREASING TO
AROUND 25 MPH IN THE AFTERNOON.
* MIXING HEIGHT............10756 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 18 TO 22 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (236632 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
CLEAR. LOWS 45 TO 55. HIGHS 75 TO 85. LIGHT WINDS.
MINIMUM HUMIDITY 12 TO 19 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 51 TO 61. HIGHS 82 TO 92. LIGHT
WINDS. MINIMUM HUMIDITY 9 TO 16 PCT.
FRIDAY
CLEAR. LOWS 55 TO 65. HIGHS 89 TO 99. LIGHT WINDS.
MINIMUM HUMIDITY 7 TO 12 PCT.
SATURDAY
CLEAR. LOWS 60 TO 70. HIGHS 93 TO 103.
SUNDAY
CLEAR. LOWS 62 TO 72. HIGHS 94 TO 104.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-042215-
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-
304 AM MST MON MAY 4 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (50-60 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........73 TO 83 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............17 TO 27 PCT.
24 HR TREND...........UP 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 15 TO 20 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 40 MPH DECREASING TO
AROUND 30 MPH IN THE AFTERNOON.
* MIXING HEIGHT............5826 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 20 TO 22 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (128172 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (65-75 PCT). CHANCE OF
SHOWERS.
* CHANCE OF PRECIP.........40 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........49 TO 59 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............65 TO 75 PCT.
24 HR TREND...........UP 16 TO 20 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 25 MPH INCREASING TO
AROUND 40 MPH AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........30 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........67 TO 77 DEGS.
24 HR TREND...........DOWN 4 TO 8 DEGS.
* MIN HUMIDITY.............24 TO 34 PCT.
24 HR TREND...........UP 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 20 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 40 MPH DECREASING TO
AROUND 30 MPH IN THE AFTERNOON.
* MIXING HEIGHT............8059 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 24 TO 31 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (249829 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
CLEAR. LOWS 39 TO 49. HIGHS 69 TO 79. LIGHT WINDS.
MINIMUM HUMIDITY 14 TO 22 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 44 TO 54. HIGHS 75 TO 85. LIGHT
WINDS. MINIMUM HUMIDITY 11 TO 21 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 48 TO 58. HIGHS 81 TO 91. LIGHT
WINDS. MINIMUM HUMIDITY 8 TO 16 PCT.
SATURDAY
CLEAR. LOWS 54 TO 64. HIGHS 86 TO 96.
SUNDAY
MOSTLY CLEAR. LOWS 55 TO 65. HIGHS 87 TO 97.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-042215-
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-
304 AM MST MON MAY 4 2026
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT) THEN BECOMING
MOSTLY CLOUDY (55-65 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........75 TO 85 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............15 TO 25 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 35 MPH BECOMING WEST
AROUND 25 MPH IN THE AFTERNOON.
* MIXING HEIGHT............8473 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 19 TO 24 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (203352 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT). CHANCE OF
SHOWERS.
* CHANCE OF PRECIP.........30 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........49 TO 59 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............64 TO 74 PCT.
24 HR TREND...........UP 16 TO 20 PCT.
* WIND (20 FT/10-MIN AVG)..WEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 25 MPH INCREASING TO
AROUND 35 MPH AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT) THEN BECOMING
PARTLY CLOUDY (40-50 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........40 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........68 TO 78 DEGS.
24 HR TREND...........DOWN 4 TO 8 DEGS.
* MIN HUMIDITY.............26 TO 36 PCT.
24 HR TREND...........UP 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 20 MPH.
* 10000 FT MSL WIND........SOUTHWEST 30 TO 35 MPH.
* MIXING HEIGHT............9840 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 21 KNOTS INCREASING TO 33
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (324720 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
CLEAR. LOWS 40 TO 50. HIGHS 69 TO 79. WEST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 12 TO 21 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 43 TO 53. HIGHS 74 TO 84. LIGHT
WINDS. MINIMUM HUMIDITY 9 TO 19 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 47 TO 57. HIGHS 80 TO 90. LIGHT
WINDS. MINIMUM HUMIDITY 7 TO 15 PCT.
SATURDAY
CLEAR. LOWS 53 TO 63. HIGHS 85 TO 95.
SUNDAY
MOSTLY CLEAR. LOWS 55 TO 65. HIGHS 86 TO 96.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-042215-
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-
304 AM MST MON MAY 4 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (55-65 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........63 TO 73 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............20 TO 30 PCT.
24 HR TREND...........DOWN 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..WEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 30 TO 35 MPH.
* MIXING HEIGHT............7742 FT AGL.
* TRANSPORT WINDS..........WEST 21 TO 28 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (216776 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (75-85 PCT). CHANCE OF
SHOWERS.
* CHANCE OF PRECIP.........40 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........40 TO 50 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MAX HUMIDITY.............77 TO 87 PCT.
24 HR TREND...........UP 18 TO 22 PCT.
* WIND (20 FT/10-MIN AVG)..WEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 20 TO 25 MPH.
TUESDAY
* SKY/WEATHER..............MOSTLY CLOUDY (70-80 PCT). SHOWERS
LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........60 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........55 TO 65 DEGS.
24 HR TREND...........DOWN 4 TO 8 DEGS.
* MIN HUMIDITY.............37 TO 47 PCT.
24 HR TREND...........UP 15 TO 19 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 25 TO 30 MPH.
* MIXING HEIGHT............8061 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 15 KNOTS INCREASING TO 27
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (217647 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
MOSTLY CLEAR. LOWS 33 TO 43. HIGHS 60 TO 70. WEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 13 TO 23 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 37 TO 47. HIGHS 65 TO 75. LIGHT
WINDS. MINIMUM HUMIDITY 10 TO 16 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 41 TO 51. HIGHS 72 TO 82. LIGHT
WINDS. MINIMUM HUMIDITY 10 TO 16 PCT.
SATURDAY
MOSTLY CLEAR. LOWS 46 TO 56. HIGHS 75 TO 85.
SUNDAY
MOSTLY CLEAR. LOWS 48 TO 58. HIGHS 75 TO 85.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-042215-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
304 AM MST MON MAY 4 2026
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT) THEN BECOMING
MOSTLY CLOUDY (50-60 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........65 TO 75 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............19 TO 29 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 15 TO 20 MPH.
* 10000 FT MSL WIND........SOUTHWEST 30 TO 35 MPH.
* MIXING HEIGHT............8500 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 20 TO 25 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (191250 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT). CHANCE OF
SHOWERS.
* CHANCE OF PRECIP.........40 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........44 TO 54 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MAX HUMIDITY.............66 TO 76 PCT.
24 HR TREND...........UP 16 TO 20 PCT.
* WIND (20 FT/10-MIN AVG)..WEST 15 TO 20 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 25 MPH INCREASING TO
AROUND 40 MPH AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER..............MOSTLY CLOUDY (60-70 PCT) THEN BECOMING
PARTLY CLOUDY (35-45 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........40 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........58 TO 68 DEGS.
24 HR TREND...........DOWN 4 TO 8 DEGS.
* MIN HUMIDITY.............29 TO 39 PCT.
24 HR TREND...........UP 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 20 MPH.
* 10000 FT MSL WIND........SOUTHWEST AROUND 40 MPH DECREASING TO
AROUND 30 MPH IN THE AFTERNOON.
* MIXING HEIGHT............10310 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 26 TO 35 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (314455 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
CLEAR. LOWS 36 TO 46. HIGHS 60 TO 70. WEST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 16 TO 26 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 42 TO 52. HIGHS 64 TO 74. LIGHT
WINDS. MINIMUM HUMIDITY 13 TO 23 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 45 TO 55. HIGHS 70 TO 80. LIGHT
WINDS. MINIMUM HUMIDITY 10 TO 20 PCT.
SATURDAY
CLEAR. LOWS 50 TO 60. HIGHS 75 TO 85.
SUNDAY
MOSTLY CLEAR. LOWS 52 TO 62. HIGHS 76 TO 86.
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE
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