743
FNUS55 KTWC 141016
FWFTWC
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST ARIZONA
NATIONAL WEATHER SERVICE TUCSON AZ
316 AM MST MON JUL 14 2025
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY
TERRAIN DRIVEN WINDS
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
DISCUSSION
AN UPTICK IN MONSOON ACTIVITY IS EXPECTED TO CONTINUE
THROUGHOUT THE WEEK. DEEPER ATMOSPHERIC MOISTURE MOVING INTO THE
AREA TUESDAY THROUGH THURSDAY WILL INCREASE THE POTENTIAL FOR
HEAVY RAINFALL AND LOCALIZED FLASH FLOODING. TEMPERATURES WILL
REMAIN ABOVE NORMAL THROUGH TOMORROW, THEN DROP BACK DOWN TO NEAR
OR SLIGHTLY BELOW NORMAL BY MID WEEK. WINDS WILL REMAIN WESTERLY
FROM 10-15 MPH, WITH OCCASIONAL GUSTS AT OR ABOVE 25 MPH.
AFTERNOON RH VALUES IN THE LOW LYING AREAS WILL BE BETWEEN 10-15%
TODAY, THEN 20-30% THROUGH THE REMAINDER OF THE WEEK.
AZZ150-150030-
ARIZONA FIRE WEATHER ZONE 150
SONORAN FDRA-MOST OF PIMA COUNTY-SOUTH CENTRAL PINAL COUNTY-
TOHONO O'ODHAM NATION-TUCSON METROPOLITAN AREA-TDC-
316 AM MST MON JUL 14 2025
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........20 PCT.
* CHANCE OF THUNDER........20 PCT.
* MAX TEMPERATURE..........97 TO 107 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............17 TO 27 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........NORTH 10 TO 15 MPH.
* MIXING HEIGHT............10341 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 13 KNOTS SHIFTING TO THE WEST
11 KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (113751 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..........73 TO 83 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............47 TO 57 PCT.
24 HR TREND...........UP 8 TO 12 PCT.
* WIND (20 FT/10-MIN AVG)..BREEZY. SOUTH 15 TO 25 MPH.
* 10000 FT MSL WIND........NORTHEAST 10 TO 15 MPH.
TUESDAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........40 PCT.
* CHANCE OF THUNDER........40 PCT.
* MAX TEMPERATURE..........95 TO 105 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............23 TO 33 PCT.
24 HR TREND...........UP 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 15 TO 20 MPH.
* 10000 FT MSL WIND........EAST AROUND 5 MPH SHIFTING TO THE SOUTH
IN THE AFTERNOON.
* MIXING HEIGHT............8241 FT AGL.
* TRANSPORT WINDS..........SOUTHWEST 15 TO 17 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (140097 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 73 TO 83. HIGHS 91 TO 101. SOUTH WIND AROUND 15 MPH. MINIMUM
HUMIDITY 27 TO 37 PCT.
THURSDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 71 TO 81. HIGHS 90 TO 100. LIGHT WINDS. MINIMUM HUMIDITY
25 TO 35 PCT.
FRIDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS 71 TO 81. HIGHS 93 TO 103. LIGHT WINDS.
MINIMUM HUMIDITY 20 TO 30 PCT.
SATURDAY
PARTLY CLOUDY. CHANCE OF THUNDERSTORMS AND SLIGHT
CHANCE OF SHOWERS. LOWS 72 TO 82. HIGHS 94 TO 104.
SUNDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 72 TO 82. HIGHS 95 TO 105.
NOTE TO USERS - ZONE 150 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE TUCSON INTERNATIONAL AIRPORT
LOCATION (2550 MSL)
AZZ151-150030-
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-
316 AM MST MON JUL 14 2025
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........50 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........90 TO 100 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............20 TO 30 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST 10 TO 15 MPH.
* 10000 FT MSL WIND........NORTH 5 TO 10 MPH.
* MIXING HEIGHT............9604 FT AGL.
* TRANSPORT WINDS..........NORTHWEST 9 TO 12 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (115248 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (50-60 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........50 PCT.
* CHANCE OF THUNDER........20 PCT.
* MIN TEMPERATURE..........65 TO 75 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MAX HUMIDITY.............65 TO 75 PCT.
24 HR TREND...........UP 7 TO 11 PCT.
* WIND (20 FT/10-MIN AVG)..BREEZY. SOUTH AROUND 25 MPH DECREASING
TO AROUND 15 MPH AFTER MIDNIGHT.
* 10000 FT MSL WIND........NORTHEAST 10 TO 15 MPH.
TUESDAY
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT) THEN BECOMING
MOSTLY CLOUDY (55-65 PCT). SHOWERS AND
CHANCE OF THUNDERSTORMS.
* CHANCE OF PRECIP.........70 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........88 TO 98 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............27 TO 37 PCT.
24 HR TREND...........UP 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH INCREASING TO
WEST AROUND 20 MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........EAST AROUND 5 MPH SHIFTING TO THE WEST
IN THE AFTERNOON.
* MIXING HEIGHT............7011 FT AGL.
* TRANSPORT WINDS..........WEST 9 TO 18 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (126198 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
THUNDERSTORMS LIKELY AND CHANCE OF SHOWERS. LOWS
65 TO 75. HIGHS 84 TO 94. SOUTHWEST WIND AROUND 15 MPH. MINIMUM
HUMIDITY 32 TO 42 PCT.
THURSDAY
SHOWERS AND THUNDERSTORMS LIKELY. LOWS 63 TO 73.
HIGHS 83 TO 93. LIGHT WINDS. MINIMUM HUMIDITY 31 TO 41 PCT.
FRIDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 64 TO 74. HIGHS 86 TO 96. LIGHT WINDS. MINIMUM HUMIDITY
25 TO 35 PCT.
SATURDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 65 TO 75. HIGHS 87 TO 97.
SUNDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 65 TO 75. HIGHS 89 TO 99.
NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION
(3500 MSL)
AZZ152-150030-
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-
316 AM MST MON JUL 14 2025
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........60 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........90 TO 100 DEGS.
24 HR TREND...........DOWN 3 TO 6 DEGS.
* MIN HUMIDITY.............18 TO 28 PCT.
24 HR TREND...........UP 4 TO 8 PCT.
* WIND (20 FT/10-MIN AVG)..LIGHT WINDS BECOMING SOUTH AROUND 20 MPH
IN THE AFTERNOON.
* 10000 FT MSL WIND........NORTH 5 TO 10 MPH.
* MIXING HEIGHT............9023 FT AGL.
* TRANSPORT WINDS..........NORTHWEST 8 TO 16 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (144368 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (50-60 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........60 PCT.
* CHANCE OF THUNDER........50 PCT.
* MIN TEMPERATURE..........64 TO 74 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............61 TO 71 PCT.
24 HR TREND...........UP 2 TO 5 PCT.
* WIND (20 FT/10-MIN AVG)..WINDY. SOUTH AROUND 30 MPH DECREASING TO
AROUND 10 MPH AFTER MIDNIGHT.
* 10000 FT MSL WIND........NORTHEAST 10 TO 15 MPH.
TUESDAY
* SKY/WEATHER..............PARTLY CLOUDY (35-45 PCT) THEN BECOMING
MOSTLY CLOUDY (65-75 PCT). SHOWERS
LIKELY AND CHANCE OF THUNDERSTORMS.
* CHANCE OF PRECIP.........60 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........89 TO 99 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............20 TO 30 PCT.
24 HR TREND...........UP 1 TO 4 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH INCREASING TO
WEST AROUND 20 MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........NORTH AROUND 5 MPH SHIFTING TO THE WEST
IN THE AFTERNOON.
* MIXING HEIGHT............7774 FT AGL.
* TRANSPORT WINDS..........WEST 10 TO 18 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (139932 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
SHOWERS AND THUNDERSTORMS LIKELY. LOWS 66 TO 76.
HIGHS 86 TO 96. WEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 28 TO
38 PCT.
THURSDAY
SHOWERS AND THUNDERSTORMS LIKELY. LOWS 64 TO 74.
HIGHS 85 TO 95. WEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 27 TO
37 PCT.
FRIDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 64 TO 74. HIGHS 87 TO 97. LIGHT WINDS. MINIMUM HUMIDITY
22 TO 32 PCT.
SATURDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 64 TO 74. HIGHS 88 TO 98.
SUNDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 65 TO 75. HIGHS 89 TO 99.
NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL)
AZZ153-150030-
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-
316 AM MST MON JUL 14 2025
TODAY
* SKY/WEATHER..............PARTLY CLOUDY (40-50 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........60 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........80 TO 90 DEGS.
24 HR TREND...........DOWN 3 TO 6 DEGS.
* MIN HUMIDITY.............23 TO 33 PCT.
24 HR TREND...........UP 6 TO 10 PCT.
* WIND (20 FT/10-MIN AVG)..BREEZY. LIGHT WINDS BECOMING SOUTHWEST
AROUND 25 MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........NORTHWEST 5 TO 10 MPH.
* MIXING HEIGHT............9685 FT AGL.
* TRANSPORT WINDS..........WEST 9 KNOTS INCREASING TO NORTHWEST 19
KNOTS IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (184015 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (65-75 PCT) THEN BECOMING
PARTLY CLOUDY (40-50 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........50 PCT.
* CHANCE OF THUNDER........50 PCT.
* MIN TEMPERATURE..........56 TO 66 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MAX HUMIDITY.............61 TO 71 PCT.
24 HR TREND...........UP 3 TO 6 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTH AROUND 20 MPH IN THE EVENING
BECOMING LIGHT.
* 10000 FT MSL WIND........NORTHWEST 10 TO 15 MPH.
TUESDAY
* SKY/WEATHER..............PARTLY CLOUDY (20-30 PCT) THEN BECOMING
MOSTLY CLOUDY (70-80 PCT). SHOWERS AND
THUNDERSTORMS LIKELY.
* CHANCE OF PRECIP.........70 PCT.
* CHANCE OF THUNDER........70 PCT.
* MAX TEMPERATURE..........81 TO 91 DEGS.
24 HR TREND...........LITTLE CHANGE.
* MIN HUMIDITY.............23 TO 33 PCT.
24 HR TREND...........LITTLE CHANGE.
* WIND (20 FT/10-MIN AVG)..WEST AROUND 10 MPH INCREASING TO AROUND
20 MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........NORTHWEST 5 TO 10 MPH.
* MIXING HEIGHT............7392 FT AGL.
* TRANSPORT WINDS..........NORTHWEST 9 KNOTS INCREASING TO 20 KNOTS
IN THE AFTERNOON.
* VENTILATION CATEGORY.....EXCELLENT (147840 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
SHOWERS AND CHANCE OF THUNDERSTORMS. LOWS 58 TO 68.
HIGHS 79 TO 89. WEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 25 TO
35 PCT.
THURSDAY
SHOWERS AND THUNDERSTORMS LIKELY. LOWS 57 TO 67.
HIGHS 77 TO 87. LIGHT WINDS. MINIMUM HUMIDITY 28 TO 38 PCT.
FRIDAY
SHOWERS AND THUNDERSTORMS LIKELY. LOWS 57 TO 67. HIGHS
78 TO 88. LIGHT WINDS. MINIMUM HUMIDITY 23 TO 33 PCT.
SATURDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 57 TO 67. HIGHS 78 TO 88.
SUNDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS 57 TO 67. HIGHS 79 TO 89.
NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL)
AZZ154-150030-
ARIZONA FIRE WEATHER ZONE 154
FOREST WOODLANDS FDRA INCLUDING THE SKY ISLANDS OF SOUTHEAST
ARIZONA ABOVE 5500 FEET-CORONADO NF-TDC-
316 AM MST MON JUL 14 2025
TODAY
* SKY/WEATHER..............MOSTLY CLOUDY (45-55 PCT). CHANCE OF
SHOWERS AND THUNDERSTORMS.
* CHANCE OF PRECIP.........60 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........79 TO 89 DEGS.
24 HR TREND...........DOWN 2 TO 5 DEGS.
* MIN HUMIDITY.............27 TO 37 PCT.
24 HR TREND...........UP 5 TO 9 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHEAST AROUND 10 MPH.
* 10000 FT MSL WIND........NORTHEAST 5 TO 10 MPH.
* MIXING HEIGHT............10607 FT AGL.
* TRANSPORT WINDS..........NORTH 9 TO 10 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (100766 KNOT-FT).
TONIGHT
* SKY/WEATHER..............MOSTLY CLOUDY (55-65 PCT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS.
* CHANCE OF PRECIP.........60 PCT.
* CHANCE OF THUNDER........20 PCT.
* MIN TEMPERATURE..........59 TO 69 DEGS.
24 HR TREND...........DOWN 1 DEG.
* MAX HUMIDITY.............62 TO 72 PCT.
24 HR TREND...........UP 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 20 MPH DECREASING TO
AROUND 10 MPH AFTER MIDNIGHT.
* 10000 FT MSL WIND........NORTHEAST 10 TO 15 MPH.
TUESDAY
* SKY/WEATHER..............PARTLY CLOUDY (30-40 PCT) THEN BECOMING
MOSTLY CLOUDY (70-80 PCT). SHOWERS AND
CHANCE OF THUNDERSTORMS.
* CHANCE OF PRECIP.........70 PCT.
* CHANCE OF THUNDER........50 PCT.
* MAX TEMPERATURE..........78 TO 88 DEGS.
24 HR TREND...........DOWN 1 TO 4 DEGS.
* MIN HUMIDITY.............31 TO 41 PCT.
24 HR TREND...........UP 3 TO 7 PCT.
* WIND (20 FT/10-MIN AVG)..SOUTHWEST AROUND 10 MPH INCREASING TO
WEST AROUND 20 MPH IN THE AFTERNOON.
* 10000 FT MSL WIND........EAST AROUND 5 MPH SHIFTING TO THE WEST
IN THE AFTERNOON.
* MIXING HEIGHT............8772 FT AGL.
* TRANSPORT WINDS..........WEST 10 TO 16 KNOTS.
* VENTILATION CATEGORY.....EXCELLENT (114036 KNOT-FT).
FORECAST DAYS 3 THROUGH 7...
WINDS IN DAYS 3 THROUGH 5 ARE SURFACE 20 FT/10-MIN AVG
WEDNESDAY
THUNDERSTORMS LIKELY AND CHANCE OF SHOWERS. LOWS
59 TO 69. HIGHS 74 TO 84. WEST WIND AROUND 15 MPH. MINIMUM
HUMIDITY 38 TO 48 PCT.
THURSDAY
SHOWERS AND THUNDERSTORMS LIKELY. LOWS 58 TO 68.
HIGHS 73 TO 83. WEST WIND AROUND 15 MPH. MINIMUM HUMIDITY 37 TO
47 PCT.
FRIDAY
THUNDERSTORMS LIKELY AND SLIGHT CHANCE OF SHOWERS. LOWS
59 TO 69. HIGHS 76 TO 86. LIGHT WINDS. MINIMUM HUMIDITY 32 TO
42 PCT.
SATURDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS 59 TO 69. HIGHS 77 TO 87.
SUNDAY
MOSTLY CLOUDY. CHANCE OF THUNDERSTORMS AND SLIGHT
CHANCE OF SHOWERS. LOWS 60 TO 70. HIGHS 78 TO 88.
NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND
TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE
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