262
FNUS55 KTWC 250846
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
146 AM MST MON MAY 25 2026
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
A WEAK WEATHER SYSTEM WILL BRING CHANCES FOR THUNDERSTORMS AND
RAIN SHOWERS TODAY, MAINLY NORTHEAST OF TUCSON, TOWARDS THE
WHITE MOUNTAINS. MOST OF THIS ACTIVITY WILL BE A LIGHT SHOWER
TO VIRGA, ALTHOUGH THERE WILL BE A 10 PERCENT CHANCE FOR
ISOLATED 'DRY' THUNDERSTORMS AND THE THREAT OF GUSTY OUTFLOW
WINDS AND LIGHTNING. RAINFALL AMOUNTS WILL BE LIGHT, GENERALLY
ONLY TRACE AMOUNTS TO LESS THAN A TENTH, WITH THE HIGHEST
PRECIPITATION TOTALS FORECASTED IN THE WHITE MOUNTAINS AT
0.10"-0.35".
HIGH TEMPERATURES WILL BE WITHIN A COUPLE OF DEGREES OF NORMAL
THROUGH THIS WEEK. MIN RH VALUES WILL BE IN THE 7-18 PERCENT
RANGE IN THE VALLEYS AND IN THE 14-20 PERCENT RANGE IN THE
MOUNTAINS THROUGH NEXT WEEK, EXCEPT ON TODAY IN THE EASTERN
MOUNTAINS WHEN RH VALUES WILL BE IN THE 20-40 PERCENT RANGE.
BREEZY SOUTHWESTERLY WINDS ARE EXPECTED THIS AFTERNOON AND
TUESDAY WITH SPEEDS 15 TO 18 MPH WITH GUSTS UP 25 MPH. STRONGER
SOUTHWEST WINDS ARE EXPECTED ON WEDNESDAY AND THURSDAY, BRINGING
ELEVATED FIRE WEATHER CONDITIONS FROM SELLS EAST.
AZZ150-252345-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
146 AM MST MON MAY 25 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........87 TO 97 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............7 TO 14 PCT.
24 HR TREND...........DOWN 4 TO 8 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTHWEST AROUND 10
MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............12992 FT AGL.
* TRANSPORT WINDS..........SOUTH 9 TO 12 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (155904 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (5-15 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........57 TO 67 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MAX HUMIDITY.............28 TO 38 PCT.
24 HR TREND...........DOWN 9 TO 13 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 15 MPH SHIFTING TO THE
SOUTH AFTER MIDNIGHT.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
TUESDAY
* SKY/WEATHER..............SUNNY (0-10 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........86 TO 96 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............8 TO 18 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............11791 FT AGL.
* TRANSPORT WINDS..........SOUTH 12 TO 15 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (176865 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
CLEAR. LOWS 56 TO 66. HIGHS 83 TO 93. SOUTH WIND
AROUND 20 MPH. MINIMUM HUMIDITY 15 TO 25 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 54 TO 64. HIGHS 82 TO 92. SOUTH
WIND AROUND 20 MPH. MINIMUM HUMIDITY 13 TO 23 PCT.
FRIDAY
CLEAR. LOWS 53 TO 63. HIGHS 84 TO 94. SOUTHWEST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 9 TO 19 PCT.
SATURDAY
CLEAR. LOWS 56 TO 66. HIGHS 87 TO 97.
SUNDAY
CLEAR. LOWS 58 TO 68. HIGHS 91 TO 101.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-252345-
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-
146 AM MST MON MAY 25 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........81 TO 91 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............8 TO 17 PCT.
24 HR TREND...........DOWN 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............10368 FT AGL.
* TRANSPORT WINDS..........SOUTH 14 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (145152 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (10-20 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........51 TO 61 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MAX HUMIDITY.............30 TO 40 PCT.
24 HR TREND...........DOWN 20 TO 24 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 10 TO 15 MPH.
TUESDAY
* SKY/WEATHER..............SUNNY (0-10 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........81 TO 91 DEGS.
24 HR TREND...........DOWN 3 TO 6 DEGS.
* MIN HUMIDITY.............7 TO 14 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............9045 FT AGL.
* TRANSPORT WINDS..........SOUTH 11 TO 14 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (126630 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
CLEAR. LOWS 50 TO 60. HIGHS 81 TO 91. SOUTH WIND
AROUND 25 MPH. MINIMUM HUMIDITY 7 TO 17 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 50 TO 60. HIGHS 81 TO 91. SOUTH
WIND AROUND 25 MPH. MINIMUM HUMIDITY 9 TO 19 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 50 TO 60. HIGHS 80 TO 90. SOUTHWEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 9 TO 17 PCT.
SATURDAY
CLEAR. LOWS 51 TO 61. HIGHS 83 TO 93.
SUNDAY
CLEAR. LOWS 53 TO 63. HIGHS 85 TO 95.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-252345-
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-
146 AM MST MON MAY 25 2026
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (45-55 PCT). SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........20 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........81 TO 91 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............13 TO 23 PCT.
24 HR TREND...........DOWN 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..EAST AROUND 10 MPH SHIFTING TO THE SOUTH
IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
* MIXING HEIGHT............11655 FT AGL.
* TRANSPORT WINDS..........EAST 14 KNOTS SHIFTING TO THE SOUTH 16
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (186480 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........52 TO 62 DEGS.
24 HR TREND...........DOWN 3 TO 6 DEGS.
* MAX HUMIDITY.............37 TO 47 PCT.
24 HR TREND...........DOWN 23 TO 27 PCT.
* WIND (20 FT/10-MIN AVG)..WEST AROUND 15 MPH SHIFTING TO THE
SOUTHWEST AFTER MIDNIGHT.
* 10000 FT MSL WIND........WEST 10 TO 15 MPH.
TUESDAY
* SKY/WEATHER..............MOSTLY SUNNY (10-20 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........81 TO 91 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............7 TO 15 PCT.
24 HR TREND...........DOWN 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 5 TO 10 MPH.
* MIXING HEIGHT............11470 FT AGL.
* TRANSPORT WINDS..........SOUTH 9 TO 16 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (183520 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
CLEAR. LOWS 51 TO 61. HIGHS 82 TO 92. SOUTHWEST WIND
AROUND 20 MPH. MINIMUM HUMIDITY 5 TO 11 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 52 TO 62. HIGHS 83 TO 93. SOUTH
WIND AROUND 20 MPH. MINIMUM HUMIDITY 6 TO 12 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 52 TO 62. HIGHS 82 TO 92. SOUTHWEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 8 TO 15 PCT.
SATURDAY
MOSTLY CLEAR. LOWS 52 TO 62. HIGHS 83 TO 93.
SUNDAY
MOSTLY CLEAR. LOWS 53 TO 63. HIGHS 85 TO 95.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-252345-
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-
146 AM MST MON MAY 25 2026
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (45-55 PCT) THEN BECOMING
PARTLY CLOUDY (40-50 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........70 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........68 TO 78 DEGS.
24 HR TREND...........DOWN 5 TO 9 DEGS.
* MIN HUMIDITY.............27 TO 37 PCT.
24 HR TREND...........UP 8 TO 12 PCT.
* WIND (20 FT/10-MIN AVG)..EAST AROUND 10 MPH SHIFTING TO THE SOUTH
IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
* MIXING HEIGHT............9607 FT AGL.
* TRANSPORT WINDS..........EAST 14 KNOTS SHIFTING TO THE SOUTH IN
THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (182533 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........45 TO 55 DEGS.
24 HR TREND...........DOWN 4 TO 8 DEGS.
* MAX HUMIDITY.............53 TO 63 PCT.
24 HR TREND...........DOWN 6 TO 10 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST AROUND 10 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
* 10000 FT MSL WIND........WEST 10 TO 15 MPH.
TUESDAY
* 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...........LITTLE CHANGE.
* MIN HUMIDITY.............12 TO 22 PCT.
24 HR TREND...........DOWN 8 TO 12 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTHWEST AROUND 5 MPH INCREASING TO
AROUND 15 MPH IN THE AFTERNOON.
* MIXING HEIGHT............10476 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 10 KNOTS SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (157140 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
CLEAR. LOWS 44 TO 54. HIGHS 71 TO 81. SOUTHWEST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 6 TO 11 PCT.
THURSDAY
CLEAR. LOWS 45 TO 55. HIGHS 72 TO 82. SOUTHWEST WIND
AROUND 20 MPH. MINIMUM HUMIDITY 7 TO 12 PCT.
FRIDAY
CLEAR. LOWS 44 TO 54. HIGHS 71 TO 81. WEST WIND AROUND
15 MPH. MINIMUM HUMIDITY 9 TO 17 PCT.
SATURDAY
CLEAR. LOWS 44 TO 54. HIGHS 74 TO 84.
SUNDAY
MOSTLY CLEAR. LOWS 46 TO 56. HIGHS 76 TO 86.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-252345-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
146 AM MST MON MAY 25 2026
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT) THEN BECOMING
MOSTLY SUNNY (20-30 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 1 TO 4 DEGS.
* MIN HUMIDITY.............16 TO 26 PCT.
24 HR TREND...........DOWN 4 TO 8 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 15 TO 20 MPH.
* MIXING HEIGHT............12547 FT AGL.
* TRANSPORT WINDS..........SOUTH 15 TO 17 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (200752 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........48 TO 58 DEGS.
24 HR TREND...........DOWN 3 TO 6 DEGS.
* MAX HUMIDITY.............31 TO 41 PCT.
24 HR TREND...........DOWN 29 TO 33 PCT.
* WIND (20 FT/10-MIN AVG)..WEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTHWEST 10 TO 15 MPH.
TUESDAY
* SKY/WEATHER..............MOSTLY SUNNY (5-15 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........70 TO 80 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MIN HUMIDITY.............9 TO 19 PCT.
24 HR TREND...........DOWN 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........SOUTH 5 TO 10 MPH.
* MIXING HEIGHT............12526 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 10 TO 16 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (162838 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
CLEAR. LOWS 47 TO 57. HIGHS 71 TO 81. SOUTH WIND
AROUND 20 MPH. MINIMUM HUMIDITY 7 TO 16 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 48 TO 58. HIGHS 72 TO 82. SOUTH
WIND AROUND 20 MPH. MINIMUM HUMIDITY 8 TO 16 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 47 TO 57. HIGHS 71 TO 81. SOUTHWEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 10 TO 20 PCT.
SATURDAY
MOSTLY CLEAR. LOWS 48 TO 58. HIGHS 74 TO 84.
SUNDAY
MOSTLY CLEAR. LOWS 50 TO 60. 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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