515
FNUS55 KTWC 100909
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
209 AM MST SUN MAY 10 2026
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
HIGH TEMPERATURES PEAK TODAY THROUGH TUESDAY WITH
HIGHS 10-15 DEGREES ABOVE NORMAL. HIGH TEMPERATURES WILL THEN LOWER
SEVERAL DEGREES MID TO LATE WEEK, BUT STILL REMAIN ABOVE NORMAL. MIN
RELATIVE HUMIDITY VALUES THROUGH THE END OF THE WEEK WILL GENERALLY
BE IN THE 6-18 PERCENT RANGE IN THE VALLEYS AND 10-25 PERCENT IN THE
MOUNTAINS. 20-FOOT WINDS AT MOST LOCATIONS WILL BE 15 MPH OR LESS
TODAY. GUSTY EASTERLY WINDS OF 15-25 MPH ARE THEN EXPECTED MONDAY
MORNING, TAPERING OFF MONDAY AFTERNOON. OTHERWISE, 20-FOOT WINDS
WILL MAINLY BE LESS THAN 15 MPH MUCH OF NEXT WEEK. THERE IS THE
POTENTIAL FOR MID LEVEL MOISTURE TO MOVE INTO THE AREA, MAINLY
TUESDAY AND WEDNESDAY RESULTING IN A FEW CLOUD BUILD-UPS. IF THIS
OCCURS, IT WOULD RESULT IN A SLIGHT CHANCE (10 TO 20 PERCENT) OF DRY
THUNDERSTORMS AND/OR GUSTY OUTFLOW WINDS.
AZZ150-102330-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
209 AM MST SUN MAY 10 2026
TODAY
* SKY/WEATHER..............SUNNY (0-10 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........95 TO 105 DEGS.
24 HR TREND...........UP 1 DEG.
* MIN HUMIDITY.............5 TO 9 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING WEST AROUND 10 MPH
IN THE AFTERNOON.
* 10000 FT MSL WIND........WEST 5 TO 10 MPH.
* MIXING HEIGHT............13609 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 6 KNOTS SHIFTING TO THE WEST 9
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (122481 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (0-10 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........64 TO 74 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MAX HUMIDITY.............13 TO 23 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..WEST AROUND 10 MPH SHIFTING TO THE EAST
AFTER MIDNIGHT.
* 10000 FT MSL WIND........NORTH AROUND 10 MPH SHIFTING TO THE EAST
AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER..............MOSTLY SUNNY (0-10 PCT) THEN BECOMING
PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........98 TO 108 DEGS.
24 HR TREND...........UP 3 TO 7 DEGS.
* MIN HUMIDITY.............5 TO 13 PCT.
24 HR TREND...........UP 1 PCT.
* WIND (20 FT/10-MIN AVG)..EAST 15 TO 20 MPH.
* 10000 FT MSL WIND........SOUTHEAST 15 TO 20 MPH.
* MIXING HEIGHT............16290 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 14 TO 15 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (244350 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
TUESDAY
MOSTLY CLEAR. LOWS 67 TO 77. HIGHS 94 TO 104. SOUTH
WIND AROUND 15 MPH. MINIMUM HUMIDITY 7 TO 14 PCT.
WEDNESDAY
PARTLY CLOUDY. LOWS 66 TO 76. HIGHS 91 TO 101. SOUTH
WIND AROUND 15 MPH. MINIMUM HUMIDITY 7 TO 16 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 61 TO 71. HIGHS 90 TO 100.
SOUTHWEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 7 TO 12 PCT.
FRIDAY
CLEAR. LOWS 60 TO 70. HIGHS 88 TO 98.
SATURDAY
MOSTLY CLEAR. LOWS 59 TO 69. HIGHS 90 TO 100.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-102330-
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-
209 AM MST SUN MAY 10 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........88 TO 98 DEGS.
24 HR TREND...........UP 1 DEG.
* MIN HUMIDITY.............6 TO 11 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING NORTHWEST AROUND 10
MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........NORTHWEST 5 TO 10 MPH.
* MIXING HEIGHT............14002 FT AGL.
* TRANSPORT WINDS..........NORTHWEST 9 TO 12 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (168024 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (10-20 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........57 TO 67 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............25 TO 35 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST AROUND 10 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
* 10000 FT MSL WIND........NORTH AROUND 5 MPH SHIFTING TO THE EAST
AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER..............MOSTLY SUNNY (0-10 PCT) THEN BECOMING
PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........90 TO 100 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............7 TO 17 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..EAST 15 TO 20 MPH.
* 10000 FT MSL WIND........SOUTHEAST 10 TO 15 MPH.
* MIXING HEIGHT............16683 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 15 TO 18 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (300294 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
TUESDAY
MOSTLY CLEAR. LOWS 60 TO 70. HIGHS 89 TO 99. SOUTHWEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 9 TO 18 PCT.
WEDNESDAY
PARTLY CLOUDY. LOWS 59 TO 69. HIGHS 86 TO 96.
SOUTHWEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 11 TO 21 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 56 TO 66. HIGHS 84 TO 94.
SOUTHWEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 8 TO 15 PCT.
FRIDAY
CLEAR. LOWS 54 TO 64. HIGHS 83 TO 93.
SATURDAY
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)
AZZ152-102330-
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-
209 AM MST SUN MAY 10 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (5-15 PCT) THEN BECOMING
PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........88 TO 98 DEGS.
24 HR TREND...........UP 1 DEG.
* MIN HUMIDITY.............6 TO 12 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST AROUND 10 MPH.
* 10000 FT MSL WIND........NORTHWEST 10 TO 15 MPH.
* MIXING HEIGHT............13637 FT AGL.
* TRANSPORT WINDS..........NORTHWEST 10 TO 12 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (163644 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........56 TO 66 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MAX HUMIDITY.............40 TO 50 PCT.
24 HR TREND...........UP 25 TO 29 PCT.
* WIND (20 FT/10-MIN AVG)..BREEZY. NORTHWEST AROUND 15 MPH
INCREASING TO EAST AROUND 25 MPH AFTER
MIDNIGHT.
* 10000 FT MSL WIND........NORTHWEST AROUND 10 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
MONDAY
* 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...........LITTLE CHANGE.
* MIN HUMIDITY.............8 TO 18 PCT.
24 HR TREND...........UP 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..WINDY. EAST 20 TO 30 MPH.
* 10000 FT MSL WIND........EAST AROUND 10 MPH SHIFTING TO THE SOUTH
IN THE AFTERNOON.
* MIXING HEIGHT............11908 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 18 TO 23 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (273884 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
TUESDAY
MOSTLY CLEAR. LOWS 57 TO 67. HIGHS 89 TO 99. SOUTH
WIND AROUND 15 MPH. MINIMUM HUMIDITY 8 TO 16 PCT.
WEDNESDAY
MOSTLY CLOUDY. LOWS 58 TO 68. HIGHS 86 TO 96. WEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 11 TO 20 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 56 TO 66. HIGHS 85 TO 95. WEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 7 TO 14 PCT.
FRIDAY
CLEAR. LOWS 53 TO 63. HIGHS 84 TO 94.
SATURDAY
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)
AZZ153-102330-
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-
209 AM MST SUN MAY 10 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (10-20 PCT) THEN BECOMING
PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........77 TO 87 DEGS.
24 HR TREND...........UP 1 DEG.
* MIN HUMIDITY.............6 TO 11 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..NORTH AROUND 10 MPH SHIFTING TO THE
NORTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........NORTHWEST 15 TO 20 MPH.
* MIXING HEIGHT............14781 FT AGL.
* TRANSPORT WINDS..........NORTHWEST 12 TO 13 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (192153 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT) THEN BECOMING
CLEAR (0-10 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........49 TO 59 DEGS.
24 HR TREND...........DOWN 3 TO 6 DEGS.
* MAX HUMIDITY.............27 TO 37 PCT.
24 HR TREND...........DOWN 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..NORTH AROUND 10 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
* 10000 FT MSL WIND........NORTHWEST AROUND 15 MPH DECREASING TO
AROUND 5 MPH AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER..............SUNNY (0-10 PCT) THEN BECOMING PARTLY
CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........77 TO 87 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............11 TO 20 PCT.
24 HR TREND...........UP 4 TO 8 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 20 MPH SHIFTING TO THE
SOUTH IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 5 TO 10 MPH.
* MIXING HEIGHT............11497 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 16 KNOTS SHIFTING TO THE SOUTH
12 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (137964 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
TUESDAY
MOSTLY CLEAR. LOWS 52 TO 62. HIGHS 80 TO 90. LIGHT
WINDS. MINIMUM HUMIDITY 9 TO 15 PCT.
WEDNESDAY
PARTLY CLOUDY. LOWS 53 TO 63. HIGHS 76 TO 86.
NORTHWEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 12 TO 19 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 51 TO 61. HIGHS 75 TO 85. WEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 10 TO 16 PCT.
FRIDAY
CLEAR. LOWS 47 TO 57. HIGHS 75 TO 85.
SATURDAY
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)
AZZ154-102330-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
209 AM MST SUN MAY 10 2026
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (5-15 PCT) THEN BECOMING
PARTLY CLOUDY (20-30 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........78 TO 88 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............7 TO 14 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........NORTHWEST 10 TO 15 MPH.
* MIXING HEIGHT............15237 FT AGL.
* TRANSPORT WINDS..........NORTHWEST 12 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (182844 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLEAR (15-25 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........54 TO 64 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............34 TO 44 PCT.
24 HR TREND...........UP 24 TO 28 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST AROUND 10 MPH INCREASING TO
NORTHEAST AROUND 20 MPH AFTER MIDNIGHT.
* 10000 FT MSL WIND........NORTHWEST AROUND 10 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
MONDAY
* SKY/WEATHER..............MOSTLY SUNNY (5-15 PCT) THEN BECOMING
PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........0 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........78 TO 88 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............13 TO 23 PCT.
24 HR TREND...........UP 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..BREEZY. EAST 15 TO 25 MPH.
* 10000 FT MSL WIND........SOUTHEAST 5 TO 10 MPH.
* MIXING HEIGHT............16341 FT AGL.
* TRANSPORT WINDS..........SOUTHEAST 16 TO 21 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (302308 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
TUESDAY
MOSTLY CLEAR. LOWS 57 TO 67. HIGHS 79 TO 89. SOUTH
WIND AROUND 15 MPH. MINIMUM HUMIDITY 10 TO 20 PCT.
WEDNESDAY
PARTLY CLOUDY. LOWS 57 TO 67. HIGHS 76 TO 86. WEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 13 TO 23 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 54 TO 64. HIGHS 76 TO 86.
SOUTHWEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 9 TO 18 PCT.
FRIDAY
CLEAR. LOWS 51 TO 61. HIGHS 75 TO 85.
SATURDAY
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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