040
FNUS55 KTWC 071125
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
425 AM MST MON JUL 7 2025
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
ALTHOUGH SOUTHEAST ARIZONA WILL BE EXPERIENCING A
LOW-GRADE MONSOON PATTERN THE FIRST HALF OF THE WEEK, ISOLATED TO
LOW-END SCATTERED THUNDERSTORM COVERAGE IS EXPECTED TO THE SOUTH
AND SOUTHEAST OF TUCSON FOR THE NEXT SEVERAL DAYS. THE MAIN THREAT
FOR STORMS WILL BE THE POTENTIAL FOR STRONG GUSTY AND ERRATIC
OUTFLOW WINDS. OTHERWISE, AN EVENTUAL UPTICK IN MONSOON ACTIVITY
IS POSSIBLE THE SECOND HALF OF THE WEEK INTO NEXT WEEKEND AS THE
UPPER HIGH SHIFTS TO A MORE FAVORABLE LOCATION ALOFT. TEMPERATURES
WILL BE ABOVE NORMAL THIS WEEK WITH HOTTEST TEMPERATURES MID-WEEK.
WINDS GENERALLY LIGHT AND UNDER 15 MPH WITH THE EXCEPTION OF
GUSTY AND ERRATIC WINDS UP TO 35-45 MPH NEAR ANY THUNDERSTORMS.
AZZ150-072300-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
425 AM MST MON JUL 7 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT) THEN BECOMING
PARTLY CLOUDY (30-40 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........99 TO 109 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............16 TO 26 PCT.
24 HR TREND...........UP 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH SHIFTING TO THE WEST
IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTH 10 TO 15 MPH.
* MIXING HEIGHT............11915 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 13 TO 16 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (190640 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MIN TEMPERATURE..........75 TO 85 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............46 TO 56 PCT.
24 HR TREND...........UP 13 TO 17 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH.
* 10000 FT MSL WIND........WEST AROUND 10 MPH SHIFTING TO THE
NORTHEAST AFTER MIDNIGHT.
TUESDAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT) THEN BECOMING
PARTLY CLOUDY (25-35 PCT).
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........0 PCT.
* MAX TEMPERATURE..........101 TO 111 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MIN HUMIDITY.............13 TO 23 PCT.
24 HR TREND...........DOWN 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH SHIFTING TO THE
NORTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........EAST 5 TO 10 MPH.
* MIXING HEIGHT............10600 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 10 KNOTS SHIFTING TO THE
NORTHWEST 12 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (127200 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS 78 TO
88. HIGHS 105 TO 115. LIGHT WINDS. MINIMUM HUMIDITY 10 TO 18 PCT.
THURSDAY
MOSTLY CLEAR. LOWS 78 TO 88. HIGHS 101 TO 111.
SOUTHWEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 17 TO 27 PCT.
FRIDAY
MOSTLY CLEAR. LOWS 75 TO 85. HIGHS 98 TO 108. SOUTHWEST
WIND AROUND 15 MPH. MINIMUM HUMIDITY 19 TO 29 PCT.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 73 TO 83. HIGHS 98 TO 108.
SUNDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 73 TO 83. HIGHS 99 TO 109.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-072300-
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-
425 AM MST MON JUL 7 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (20-30 PCT) THEN BECOMING
PARTLY CLOUDY (35-45 PCT). SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........20 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........93 TO 103 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............19 TO 29 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 10 MPH SHIFTING TO THE WEST
IN THE AFTERNOON.
* 10000 FT MSL WIND........SOUTHEAST AROUND 5 MPH SHIFTING TO THE
WEST IN THE AFTERNOON.
* MIXING HEIGHT............10813 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 10 KNOTS SHIFTING TO THE WEST
12 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (129756 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT). SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........30 PCT.
* CHANCE OF THUNDER........20 PCT.
* MIN TEMPERATURE..........68 TO 78 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............51 TO 61 PCT.
24 HR TREND...........DOWN 7 TO 11 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........NORTH 15 TO 20 MPH.
TUESDAY
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........30 PCT.
* CHANCE OF THUNDER........30 PCT.
* MAX TEMPERATURE..........95 TO 105 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............14 TO 24 PCT.
24 HR TREND...........DOWN 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........NORTHEAST 10 TO 15 MPH.
* MIXING HEIGHT............10897 FT AGL.
* TRANSPORT WINDS..........NORTH 12 TO 13 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (141661 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 70 TO 80. HIGHS 98 TO 108. NORTHWEST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 12 TO 22 PCT.
THURSDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 70 TO 80. HIGHS 95 TO 105. WEST WIND AROUND 20 MPH. MINIMUM
HUMIDITY 16 TO 26 PCT.
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 68 TO 78. HIGHS 93 TO 103. WEST WIND AROUND 15 MPH. MINIMUM
HUMIDITY 19 TO 29 PCT.
SATURDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 67 TO 77. HIGHS 93 TO 103.
SUNDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 66 TO 76. HIGHS 93 TO 103.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-072300-
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-
425 AM MST MON JUL 7 2025
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT). SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........20 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........94 TO 104 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............14 TO 24 PCT.
24 HR TREND...........UP 1 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH SHIFTING TO THE
NORTHWEST IN THE AFTERNOON.
* 10000 FT MSL WIND........NORTHWEST 5 TO 10 MPH.
* MIXING HEIGHT............11439 FT AGL.
* TRANSPORT WINDS..........WEST 7 TO 12 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (137268 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........10 PCT.
* MIN TEMPERATURE..........68 TO 78 DEGS.
24 HR TREND...........UP 1 DEG.
* MAX HUMIDITY.............44 TO 54 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..WEST 10 TO 15 MPH.
* 10000 FT MSL WIND........NORTH 10 TO 15 MPH.
TUESDAY
* SKY/WEATHER..............PARTLY CLOUDY (25-35 PCT). SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........10 PCT.
* MAX TEMPERATURE..........97 TO 107 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............10 TO 20 PCT.
24 HR TREND...........DOWN 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST AROUND 10 MPH.
* 10000 FT MSL WIND........NORTHEAST AROUND 15 MPH DECREASING TO
AROUND 5 MPH IN THE AFTERNOON.
* MIXING HEIGHT............13527 FT AGL.
* TRANSPORT WINDS..........NORTH 10 TO 11 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (148797 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 70 TO 80. HIGHS 98 TO 108. LIGHT WINDS.
MINIMUM HUMIDITY 9 TO 18 PCT.
THURSDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 71 TO 81. HIGHS 97 TO 107. WEST WIND AROUND 20 MPH. MINIMUM
HUMIDITY 11 TO 21 PCT.
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 70 TO 80. HIGHS 95 TO 105. WEST WIND AROUND 20 MPH. MINIMUM
HUMIDITY 14 TO 24 PCT.
SATURDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 68 TO 78. HIGHS 95 TO 105.
SUNDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 67 TO 77. HIGHS 94 TO 104.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-072300-
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-
425 AM MST MON JUL 7 2025
TODAY
* SKY/WEATHER..............MOSTLY SUNNY (15-25 PCT) THEN BECOMING
PARTLY CLOUDY (40-50 PCT). SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........30 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........85 TO 95 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MIN HUMIDITY.............16 TO 26 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING WEST AROUND 15 MPH
IN THE AFTERNOON.
* 10000 FT MSL WIND........WEST 5 TO 10 MPH.
* MIXING HEIGHT............12470 FT AGL.
* TRANSPORT WINDS..........NORTH 7 KNOTS SHIFTING TO THE WEST IN
THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (149640 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT). SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........10 PCT.
* CHANCE OF THUNDER........10 PCT.
* MIN TEMPERATURE..........61 TO 71 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MAX HUMIDITY.............40 TO 50 PCT.
24 HR TREND...........DOWN 1 PCT.
* WIND (20 FT/10-MIN AVG)..NORTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........NORTH 15 TO 20 MPH.
TUESDAY
* SKY/WEATHER..............MOSTLY SUNNY (10-20 PCT) THEN BECOMING
PARTLY CLOUDY (30-40 PCT). SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........20 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........88 TO 98 DEGS.
24 HR TREND...........UP 2 TO 5 DEGS.
* MIN HUMIDITY.............10 TO 18 PCT.
24 HR TREND...........DOWN 4 TO 8 PCT.
* WIND (20 FT/10-MIN AVG)..NORTH AROUND 10 MPH SHIFTING TO THE WEST
IN THE AFTERNOON.
* 10000 FT MSL WIND........NORTH 5 TO 10 MPH.
* MIXING HEIGHT............13866 FT AGL.
* TRANSPORT WINDS..........NORTH 10 TO 12 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (166392 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS 61 TO 71. HIGHS 89 TO 99. LIGHT WINDS.
MINIMUM HUMIDITY 11 TO 17 PCT.
THURSDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 63 TO 73. HIGHS 89 TO 99. NORTHWEST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 12 TO 18 PCT.
FRIDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 62 TO 72. HIGHS 87 TO 97. NORTHWEST WIND
AROUND 15 MPH. MINIMUM HUMIDITY 13 TO 22 PCT.
SATURDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 60 TO 70. HIGHS 86 TO 96.
SUNDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 59 TO 69. HIGHS 86 TO 96.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-072300-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
425 AM MST MON JUL 7 2025
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........30 PCT.
* CHANCE OF THUNDER........30 PCT.
* MAX TEMPERATURE..........83 TO 93 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............22 TO 32 PCT.
24 HR TREND...........UP 1 PCT.
* WIND (20 FT/10-MIN AVG)..WEST 10 TO 15 MPH.
* 10000 FT MSL WIND........NORTHEAST AROUND 5 MPH SHIFTING TO THE
NORTHWEST IN THE AFTERNOON.
* MIXING HEIGHT............11447 FT AGL.
* TRANSPORT WINDS..........WEST 7 TO 12 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (108746 KNOT-FT).
TONIGHT
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........30 PCT.
* CHANCE OF THUNDER........30 PCT.
* MIN TEMPERATURE..........63 TO 73 DEGS.
24 HR TREND...........UP 1 DEG.
* MAX HUMIDITY.............45 TO 55 PCT.
24 HR TREND...........DOWN 9 TO 13 PCT.
* WIND (20 FT/10-MIN AVG)..WEST 10 TO 15 MPH.
* 10000 FT MSL WIND........NORTH 10 TO 15 MPH.
TUESDAY
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........20 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........86 TO 96 DEGS.
24 HR TREND...........UP 1 TO 4 DEGS.
* MIN HUMIDITY.............16 TO 26 PCT.
24 HR TREND...........DOWN 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..NORTH 10 TO 15 MPH.
* 10000 FT MSL WIND........NORTHEAST 10 TO 15 MPH.
* MIXING HEIGHT............13697 FT AGL.
* TRANSPORT WINDS..........NORTH 12 TO 13 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (171212 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 66 TO 76. HIGHS 88 TO 98. NORTHWEST WIND AROUND 15 MPH.
MINIMUM HUMIDITY 13 TO 23 PCT.
THURSDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 66 TO 76. HIGHS 86 TO 96. WEST WIND AROUND 20 MPH. MINIMUM
HUMIDITY 15 TO 25 PCT.
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 64 TO 74. HIGHS 84 TO 94. WEST WIND AROUND 20 MPH. MINIMUM
HUMIDITY 19 TO 29 PCT.
SATURDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 62 TO 72. HIGHS 84 TO 94.
SUNDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 61 TO 71. HIGHS 84 TO 94.
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE
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