446  
FNUS55 KTWC 170934  
FWFTWC  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA  
NATIONAL WEATHER SERVICE TUCSON AZ  
234 AM MST SUN OCT 17 2021  
 
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY  
TERRAIN DRIVEN WINDS  
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  
   
DISCUSSION
 
A QUIET AND DRY PERIOD OF WEATHER IS EXPECTED INTO  
THE END OF NEXT WEEK, WITH WARM TEMPERATURES. 20-FOOT WINDS WILL  
GENERALLY BE LESS THAN 15 KTS. WINDS RETURN OUT OF THE SOUTHWEST  
THIS AFTERNOON AND REMAIN FROM THAT GENERAL DIRECTION INTO THE WEEK.  
EXPECT SEASONAL HUMIDITY LEVELS IN THE TEENS TO LOWER 20S FOR  
AFTERNOON MIN RHS AND GOOD OVERNIGHT RECOVERIES (GENERALLY  
40-60%).  
 
AZZ150-172215-  
ARIZONA FIRE WEATHER ZONE 150  
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-  
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-  
234 AM MST SUN OCT 17 2021  
   
TODAY
 
 
* SKY/WEATHER..............PARTLY CLOUDY THEN BECOMING MOSTLY  
CLOUDY.  
* MAX TEMPERATURE..........83 TO 93 DEGS.  
* 24 HR TREND...........LITTLE CHANGE.  
* MIN HUMIDITY.............14 TO 24 PCT.  
* 24 HR TREND...........UP 3 TO 7 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTH 25 TO 30 MPH.  
* CHANCE OF PRECIP.........0 PCT.  
* LAL......................1.  
* HAINES INDEX.............4 OR LOW.  
* MIXING HEIGHT............9358 FT AGL.  
* TRANSPORT WINDS..........SOUTH 13 TO 18 KNOTS.  
* VENTILATION CATEGORY.....EXCELLENT (168444 KNOT-FT).  
   
TONIGHT
 
 
* SKY/WEATHER..............PARTLY CLOUDY.  
* MIN TEMPERATURE..........50 TO 60 DEGS.  
* 24 HR TREND...........DOWN 2 TO 5 DEGS.  
* MAX HUMIDITY.............58 TO 68 PCT.  
* 24 HR TREND...........UP 19 TO 23 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTHWEST 25 TO 30 MPH.  
* CHANCE OF PRECIP.........0 PCT.  
* LAL......................1.  
* HAINES INDEX.............5 OR MODERATE.  
   
MONDAY
 
 
* SKY/WEATHER..............MOSTLY SUNNY.  
* MAX TEMPERATURE..........77 TO 87 DEGS.  
* 24 HR TREND...........DOWN 3 TO 7 DEGS.  
* MIN HUMIDITY.............22 TO 32 PCT.  
* 24 HR TREND...........UP 6 TO 10 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTHWEST 30 TO 35 MPH.  
* CHANCE OF PRECIP.........0 PCT.  
* LAL......................1.  
* HAINES INDEX.............4 OR LOW.  
* MIXING HEIGHT............7626 FT AGL.  
* TRANSPORT WINDS..........SOUTH 20 TO 23 KNOTS.  
* VENTILATION CATEGORY.....EXCELLENT (175398 KNOT-FT).  
   
FORECAST DAYS 3 THROUGH 7
 
 
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG   
TUESDAY
 
CLEAR. LOWS 46 TO 56. HIGHS 74 TO 84. LIGHT WINDS.  
MINIMUM HUMIDITY 22 TO 32 PCT.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 48 TO 58. HIGHS 78 TO 88. LIGHT  
WINDS. MINIMUM HUMIDITY 16 TO 26 PCT.    
THURSDAY
 
MOSTLY CLEAR. LOWS 50 TO 60. HIGHS 82 TO 92. LIGHT  
WINDS. MINIMUM HUMIDITY 14 TO 20 PCT.    
FRIDAY
 
MOSTLY CLEAR. LOWS 52 TO 62. HIGHS 83 TO 93.    
SATURDAY
 
PARTLY CLOUDY. LOWS 52 TO 62. HIGHS 79 TO 89.  
 
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND  
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT  
LOCATION (2550 MSL)  
 

 
 
AZZ151-172215-  
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-  
234 AM MST SUN OCT 17 2021  
   
TODAY
 
 
* SKY/WEATHER..............PARTLY CLOUDY THEN BECOMING MOSTLY  
CLOUDY.  
* MAX TEMPERATURE..........78 TO 88 DEGS.  
* 24 HR TREND...........UP 1 TO 4 DEGS.  
* MIN HUMIDITY.............19 TO 29 PCT.  
* 24 HR TREND...........UP 3 TO 6 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTH 20 TO 25 MPH.  
* CHANCE OF PRECIP.........0 PCT.  
* LAL......................1.  
* HAINES INDEX.............3 OR VERY LOW.  
* MIXING HEIGHT............7069 FT AGL.  
* TRANSPORT WINDS..........SOUTH 13 TO 18 KNOTS.  
* VENTILATION CATEGORY.....EXCELLENT (127242 KNOT-FT).  
   
TONIGHT
 
 
* SKY/WEATHER..............MOSTLY CLOUDY THEN BECOMING PARTLY  
CLOUDY.  
* MIN TEMPERATURE..........44 TO 54 DEGS.  
* 24 HR TREND...........DOWN 1 TO 4 DEGS.  
* MAX HUMIDITY.............58 TO 68 PCT.  
* 24 HR TREND...........UP 8 TO 12 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTH AROUND 25 MPH INCREASING TO  
SOUTHWEST AROUND 35 MPH AFTER MIDNIGHT.  
* CHANCE OF PRECIP.........0 PCT.  
* LAL......................1.  
* HAINES INDEX.............5 OR MODERATE.  
   
MONDAY
 
 
* SKY/WEATHER..............MOSTLY SUNNY.  
* MAX TEMPERATURE..........73 TO 83 DEGS.  
* 24 HR TREND...........DOWN 3 TO 7 DEGS.  
* MIN HUMIDITY.............22 TO 32 PCT.  
* 24 HR TREND...........UP 3 TO 6 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTHWEST 30 TO 35 MPH.  
* CHANCE OF PRECIP.........0 PCT.  
* LAL......................1.  
* HAINES INDEX.............4 OR LOW.  
* MIXING HEIGHT............5976 FT AGL.  
* TRANSPORT WINDS..........SOUTH 17 TO 24 KNOTS.  
* VENTILATION CATEGORY.....EXCELLENT (143424 KNOT-FT).  
   
FORECAST DAYS 3 THROUGH 7
 
 
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG   
TUESDAY
 
CLEAR. LOWS 42 TO 52. HIGHS 70 TO 80. LIGHT WINDS.  
MINIMUM HUMIDITY 20 TO 30 PCT.    
WEDNESDAY
 
PARTLY CLOUDY. LOWS 43 TO 53. HIGHS 73 TO 83. LIGHT  
WINDS. MINIMUM HUMIDITY 18 TO 26 PCT.    
THURSDAY
 
MOSTLY CLEAR. LOWS 44 TO 54. HIGHS 76 TO 86. LIGHT  
WINDS. MINIMUM HUMIDITY 14 TO 24 PCT.    
FRIDAY
 
MOSTLY CLEAR. LOWS 46 TO 56. HIGHS 78 TO 88.    
SATURDAY
 
MOSTLY CLEAR. LOWS 47 TO 57. 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)  
 

 
 
AZZ152-172215-  
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-  
234 AM MST SUN OCT 17 2021  
   
TODAY
 
 
* SKY/WEATHER..............PARTLY CLOUDY.  
* MAX TEMPERATURE..........76 TO 86 DEGS.  
* 24 HR TREND...........UP 3 TO 7 DEGS.  
* MIN HUMIDITY.............21 TO 31 PCT.  
* 24 HR TREND...........UP 4 TO 8 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTHEAST 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTH 20 TO 25 MPH.  
* CHANCE OF PRECIP.........0 PCT.  
* LAL......................1.  
* HAINES INDEX.............2 OR VERY LOW.  
* MIXING HEIGHT............7972 FT AGL.  
* TRANSPORT WINDS..........EAST 11 KNOTS SHIFTING TO THE SOUTH 15  
KNOTS IN THE AFTERNOON.  
* VENTILATION CATEGORY.....EXCELLENT (119580 KNOT-FT).  
   
TONIGHT
 
 
* SKY/WEATHER..............MOSTLY CLOUDY THEN BECOMING PARTLY  
CLOUDY.  
* MIN TEMPERATURE..........45 TO 55 DEGS.  
* 24 HR TREND...........LITTLE CHANGE.  
* MAX HUMIDITY.............54 TO 64 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 25 TO 30 MPH.  
* CHANCE OF PRECIP.........10 PCT.  
* LAL......................1.  
* HAINES INDEX.............5 OR MODERATE.  
   
MONDAY
 
 
* SKY/WEATHER..............MOSTLY SUNNY.  
* MAX TEMPERATURE..........73 TO 83 DEGS.  
* 24 HR TREND...........DOWN 2 TO 5 DEGS.  
* MIN HUMIDITY.............19 TO 29 PCT.  
* 24 HR TREND...........DOWN 1 TO 4 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTHWEST 25 TO 30 MPH.  
* CHANCE OF PRECIP.........0 PCT.  
* LAL......................1.  
* HAINES INDEX.............5 OR MODERATE.  
* MIXING HEIGHT............7440 FT AGL.  
* TRANSPORT WINDS..........SOUTHWEST 16 TO 24 KNOTS.  
* VENTILATION CATEGORY.....EXCELLENT (178560 KNOT-FT).  
   
FORECAST DAYS 3 THROUGH 7
 
 
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG   
TUESDAY
 
MOSTLY CLEAR. LOWS 43 TO 53. HIGHS 69 TO 79. LIGHT  
WINDS. MINIMUM HUMIDITY 20 TO 30 PCT.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 42 TO 52. HIGHS 71 TO 81. LIGHT  
WINDS. MINIMUM HUMIDITY 18 TO 27 PCT.    
THURSDAY
 
MOSTLY CLEAR. LOWS 43 TO 53. HIGHS 75 TO 85. LIGHT  
WINDS. MINIMUM HUMIDITY 15 TO 25 PCT.    
FRIDAY
 
MOSTLY CLEAR. LOWS 45 TO 55. HIGHS 76 TO 86.    
SATURDAY
 
MOSTLY CLEAR. LOWS 46 TO 56. 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)  
 

 
 
AZZ153-172215-  
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-  
234 AM MST SUN OCT 17 2021  
   
TODAY
 
 
* SKY/WEATHER..............PARTLY CLOUDY THEN BECOMING MOSTLY  
CLOUDY.  
* MAX TEMPERATURE..........64 TO 74 DEGS.  
* 24 HR TREND...........UP 2 TO 5 DEGS.  
* MIN HUMIDITY.............33 TO 43 PCT.  
* 24 HR TREND...........UP 12 TO 16 PCT.  
* WIND (20 FT/10-MIN AVG)..EAST AROUND 15 MPH SHIFTING TO THE SOUTH  
IN THE AFTERNOON.  
* 10000 FT MSL WIND........SOUTH 20 TO 25 MPH.  
* CHANCE OF PRECIP.........0 PCT.  
* LAL......................1.  
* HAINES INDEX.............2 OR VERY LOW.  
* MIXING HEIGHT............6221 FT AGL.  
* TRANSPORT WINDS..........EAST 14 KNOTS SHIFTING TO THE SOUTH 18  
KNOTS IN THE AFTERNOON.  
* VENTILATION CATEGORY.....EXCELLENT (111978 KNOT-FT).  
   
TONIGHT
 
 
* SKY/WEATHER..............MOSTLY CLOUDY THEN BECOMING MOSTLY  
CLEAR.  
* MIN TEMPERATURE..........39 TO 49 DEGS.  
* 24 HR TREND...........LITTLE CHANGE.  
* MAX HUMIDITY.............53 TO 63 PCT.  
* 24 HR TREND...........DOWN 1 TO 4 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH.  
* 10000 FT MSL WIND........SOUTHWEST 25 TO 30 MPH.  
* CHANCE OF PRECIP.........10 PCT.  
* LAL......................1.  
* HAINES INDEX.............2 OR VERY LOW.  
   
MONDAY
 
 
* SKY/WEATHER..............MOSTLY SUNNY.  
* MAX TEMPERATURE..........60 TO 70 DEGS.  
* 24 HR TREND...........DOWN 3 TO 6 DEGS.  
* MIN HUMIDITY.............25 TO 35 PCT.  
* 24 HR TREND...........DOWN 5 TO 9 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTHWEST 25 TO 30 MPH.  
* CHANCE OF PRECIP.........0 PCT.  
* LAL......................1.  
* HAINES INDEX.............4 OR LOW.  
* MIXING HEIGHT............6502 FT AGL.  
* TRANSPORT WINDS..........SOUTHWEST 17 TO 23 KNOTS.  
* VENTILATION CATEGORY.....EXCELLENT (149546 KNOT-FT).  
   
FORECAST DAYS 3 THROUGH 7
 
 
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG   
TUESDAY
 
CLEAR. LOWS 36 TO 46. HIGHS 58 TO 68. LIGHT WINDS.  
MINIMUM HUMIDITY 24 TO 34 PCT.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 35 TO 45. HIGHS 61 TO 71. LIGHT  
WINDS. MINIMUM HUMIDITY 20 TO 30 PCT.    
THURSDAY
 
MOSTLY CLEAR. LOWS 37 TO 47. HIGHS 64 TO 74. LIGHT  
WINDS. MINIMUM HUMIDITY 17 TO 27 PCT.    
FRIDAY
 
MOSTLY CLEAR. LOWS 39 TO 49. HIGHS 65 TO 75.    
SATURDAY
 
PARTLY CLOUDY. LOWS 41 TO 51. HIGHS 62 TO 72.  
 
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND  
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)  
 

 
 
AZZ154-172215-  
ARIZONA FIRE WEATHER ZONE 154  
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST  
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-  
234 AM MST SUN OCT 17 2021  
   
TODAY
 
 
* SKY/WEATHER..............PARTLY CLOUDY THEN BECOMING MOSTLY  
CLOUDY.  
* MAX TEMPERATURE..........66 TO 76 DEGS.  
* 24 HR TREND...........UP 2 TO 5 DEGS.  
* MIN HUMIDITY.............32 TO 42 PCT.  
* 24 HR TREND...........UP 10 TO 14 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTH 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTH 20 TO 25 MPH.  
* CHANCE OF PRECIP.........10 PCT.  
* LAL......................1.  
* HAINES INDEX.............2 OR VERY LOW.  
* MIXING HEIGHT............9966 FT AGL.  
* TRANSPORT WINDS..........SOUTH 15 TO 19 KNOTS.  
* VENTILATION CATEGORY.....EXCELLENT (169422 KNOT-FT).  
   
TONIGHT
 
 
* SKY/WEATHER..............MOSTLY CLOUDY THEN BECOMING PARTLY  
CLOUDY.  
* MIN TEMPERATURE..........43 TO 53 DEGS.  
* 24 HR TREND...........LITTLE CHANGE.  
* MAX HUMIDITY.............50 TO 60 PCT.  
* 24 HR TREND...........DOWN 2 TO 5 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTHWEST AROUND 20 MPH INCREASING TO  
AROUND 30 MPH AFTER MIDNIGHT.  
* CHANCE OF PRECIP.........10 PCT.  
* LAL......................1.  
* HAINES INDEX.............5 OR MODERATE.  
   
MONDAY
 
 
* SKY/WEATHER..............MOSTLY SUNNY.  
* MAX TEMPERATURE..........63 TO 73 DEGS.  
* 24 HR TREND...........DOWN 2 TO 5 DEGS.  
* MIN HUMIDITY.............28 TO 38 PCT.  
* 24 HR TREND...........DOWN 4 TO 8 PCT.  
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.  
* 10000 FT MSL WIND........SOUTHWEST 30 TO 35 MPH.  
* CHANCE OF PRECIP.........0 PCT.  
* LAL......................1.  
* HAINES INDEX.............5 OR MODERATE.  
* MIXING HEIGHT............7912 FT AGL.  
* TRANSPORT WINDS..........SOUTHWEST 23 TO 26 KNOTS.  
* VENTILATION CATEGORY.....EXCELLENT (193844 KNOT-FT).  
   
FORECAST DAYS 3 THROUGH 7
 
 
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG   
TUESDAY
 
MOSTLY CLEAR. LOWS 40 TO 50. HIGHS 60 TO 70. LIGHT  
WINDS. MINIMUM HUMIDITY 26 TO 36 PCT.    
WEDNESDAY
 
PARTLY CLOUDY. LOWS 40 TO 50. HIGHS 62 TO 72. LIGHT  
WINDS. MINIMUM HUMIDITY 22 TO 32 PCT.    
THURSDAY
 
MOSTLY CLEAR. LOWS 42 TO 52. HIGHS 66 TO 76. LIGHT  
WINDS. MINIMUM HUMIDITY 20 TO 30 PCT.    
FRIDAY
 
MOSTLY CLEAR. LOWS 44 TO 54. HIGHS 66 TO 76.    
SATURDAY
 
MOSTLY CLEAR. LOWS 44 TO 54. HIGHS 63 TO 73.  
 
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND  
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE  
 

 
 
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