FNUS55 KTWC 190924 FWFTWC Fire Weather Planning Forecast for Southeast Arizona National Weather Service Tucson AZ 224 AM MST Tue May 19 2026 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 20-FOOT WIND FORECAST OF 'LIGHT WINDS' INDICATES MAINLY TERRAIN DRIVEN WINDS +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ .DISCUSSION...Dry and breezy conditions today and tomorrow, resulting in elevated fire weather conditions for areas east and south of Tucson with brief near critical conditions existing in the southeastern portion of Cochise County. By the end of the week, winds will be generally be less than 15 mph with min relative humidities sitting in the teens to the mid-20s. Upper level moisture will be moving into the region starting Saturday, leading to mainly virga and cloud build ups to a non-zero chance for a dry thunderstorm in the higher terrain. AZZ150-200015- Arizona Fire Weather Zone 150 Sonoran FDRA-Most of Pima County-South Central Pinal County- Tohono O'odham Nation-Tucson Metropolitan area-TDC- 224 AM MST Tue May 19 2026 .TODAY... * Sky/Weather..............Mostly sunny (15-25 pct) then becoming partly cloudy (35-45 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Max Temperature..........82 to 92 degs. 24 hr Trend...........Up 3 to 6 degs. * 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........Southwest 15 to 20 mph. * Mixing height............10282 ft AGL. * Transport winds..........South 10 to 14 knots. * Ventilation Category.....Excellent (143948 knot-ft). .TONIGHT... * Sky/Weather..............Mostly cloudy (50-60 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Min Temperature..........56 to 66 degs. 24 hr Trend...........Up 2 to 5 degs. * Max Humidity.............33 to 43 pct. 24 hr Trend...........Down 9 to 13 pct. * Wind (20 ft/10-min avg)..West around 15 mph in the evening becoming light. * 10000 ft MSL Wind........Southwest 15 to 20 mph. .WEDNESDAY... * Sky/Weather..............Partly cloudy (40-50 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Max Temperature..........84 to 94 degs. 24 hr Trend...........Up 1 to 4 degs. * Min Humidity.............6 to 16 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 10 to 15 mph. * Mixing height............12015 ft AGL. * Transport winds..........South 10 to 15 knots. * Ventilation Category.....Excellent (180225 knot-ft). .Forecast days 3 through 7...... Winds in Days 3 through 5 are surface 20 ft/10-min avg .THURSDAY...Mostly clear. Lows 55 to 65. Highs 86 to 96. Light winds. Minimum Humidity 8 to 13 pct. .FRIDAY...Mostly clear. Lows 57 to 67. Highs 87 to 97. South wind around 15 mph. Minimum Humidity 8 to 16 pct. .SATURDAY...Mostly clear. Lows 58 to 68. Highs 87 to 97. Southwest wind around 15 mph. Minimum Humidity 12 to 20 pct. .SUNDAY...Mostly clear. Lows 59 to 69. Highs 89 to 99. .MEMORIAL DAY...Mostly clear. Lows 61 to 71. 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) $$ AZZ151-200015- 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- 224 AM MST Tue May 19 2026 .TODAY... * Sky/Weather..............Mostly sunny (15-25 pct) then becomingpartly cloudy (35-45 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Max Temperature..........80 to 90 degs. 24 hr Trend...........Up 3 to 6 degs. * Min Humidity.............9 to 19 pct. 24 hr Trend...........Down 3 to 7 pct. * Wind (20 ft/10-min avg)..South 10 to 15 mph. * 10000 ft MSL Wind........Southwest 20 to 25 mph. * Mixing height............7553 ft AGL. * Transport winds..........South 17 to 21 knots. * Ventilation Category.....Excellent (158613 knot-ft). .TONIGHT... * Sky/Weather..............Mostly cloudy (50-60 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Min Temperature..........51 to 61 degs. 24 hr Trend...........Up 3 to 6 degs. * Max Humidity.............31 to 41 pct. 24 hr Trend...........Down 11 to 15 pct. * Wind (20 ft/10-min avg)..Southwest around 15 mph in the evening becoming light. * 10000 ft MSL Wind........Southwest 20 to 25 mph. .WEDNESDAY... * Sky/Weather..............Mostly cloudy (45-55 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Max Temperature..........80 to 90 degs. 24 hr Trend...........Little change. * Min Humidity.............7 to 14 pct. 24 hr Trend...........Down 3 to 7 pct. * Wind (20 ft/10-min avg)..South 10 to 15 mph. * 10000 ft MSL Wind........Southwest 15 to 20 mph. * Mixing height............9681 ft AGL. * Transport winds..........South 15 to 18 knots. * Ventilation Category.....Excellent (174258 knot-ft). .Forecast days 3 through 7...... Winds in Days 3 through 5 are surface 20 ft/10-min avg .THURSDAY...Mostly clear. Lows 51 to 61. Highs 80 to 90. Southwest wind around 15 mph. Minimum Humidity 9 to 17 pct. .FRIDAY...Mostly clear. Lows 52 to 62. Highs 81 to 91. Southwest wind around 15 mph. Minimum Humidity 10 to 18 pct. .SATURDAY...Mostly clear. Lows 52 to 62. Highs 80 to 90. Light winds. Minimum Humidity 15 to 25 pct. .SUNDAY...Mostly clear. Lows 53 to 63. Highs 82 to 92. .MEMORIAL DAY...Mostly clear. Lows 54 to 64. Highs 84 to 94. NOTE TO USERS - ZONE 151 VENTILATION CATEGORY...MIXING HEIGHT AND TRANSPORT WINDS ARE BASED ON THE BUENOS AIRES N.W.R. LOCATION (3500 MSL) $$ AZZ152-200015- 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- 224 AM MST Tue May 19 2026 .TODAY... * Sky/Weather..............Mostly sunny (15-25 pct) then becoming partly cloudy (25-35 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Max Temperature..........81 to 91 degs. 24 hr Trend...........Up 2 to 5 degs. * Min Humidity.............9 to 19 pct. 24 hr Trend...........Down 3 to 7 pct. * Wind (20 ft/10-min avg)..South 10 to 15 mph. * 10000 ft MSL Wind........Southwest 20 to 25 mph. * Mixing height............9820 ft AGL. * Transport winds..........South 17 to 23 knots. * Ventilation Category.....Excellent (225860 knot-ft). .TONIGHT... * Sky/Weather..............Mostly cloudy (50-60 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Min Temperature..........52 to 62 degs. 24 hr Trend...........Up 3 to 6 degs. * Max Humidity.............26 to 36 pct. 24 hr Trend...........Down 14 to 18 pct. * Wind (20 ft/10-min avg)..Southwest 10 to 15 mph. * 10000 ft MSL Wind........Southwest 25 to 30 mph. .WEDNESDAY... * Sky/Weather..............Mostly cloudy (50-60 pct) then becoming partly cloudy (45-55 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct.* Max Temperature..........80 to 90 degs. 24 hr Trend...........Down 1 deg. * Min Humidity.............6 to 14 pct. 24 hr Trend...........Little change. * Wind (20 ft/10-min avg)..South 10 to 15 mph. * 10000 ft MSL Wind........Southwest 15 to 20 mph. * Mixing height............12216 ft AGL. * Transport winds..........South 14 to 20 knots. * Ventilation Category.....Excellent (244320 knot-ft). .Forecast days 3 through 7...... Winds in Days 3 through 5 are surface 20 ft/10-min avg .THURSDAY...Mostly clear. Lows 50 to 60. Highs 80 to 90. Southwest wind around 15 mph. Minimum Humidity 7 to 16 pct. .FRIDAY...Mostly clear. Lows 51 to 61. Highs 81 to 91. Light winds. Minimum Humidity 8 to 17 pct. .SATURDAY...Mostly clear. Lows 52 to 62. Highs 81 to 91. West wind around 15 mph. Minimum Humidity 12 to 22 pct. .SUNDAY...Mostly clear. Lows 53 to 63. Highs 83 to 93. .MEMORIAL DAY...Mostly clear. Lows 55 to 65. Highs 84 to 94. NOTE TO USERS - ZONE 152 VENTILATION CATEGORY...MIXING HEIGHT AND TRANSPORT WINDS ARE BASED ON THE CHIRICAHUA N.M. LOCATION (5400 MSL) $$ AZZ153-200015- 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- 224 AM MST Tue May 19 2026 .TODAY... * 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...........Up 1 to 4 degs. * Min Humidity.............11 to 21 pct. 24 hr Trend...........Little change. * Wind (20 ft/10-min avg)..South 10 to 15 mph. * 10000 ft MSL Wind........Southwest 15 to 20 mph. * Mixing height............8795 ft AGL. * Transport winds..........South 16 to 21 knots. * Ventilation Category.....Excellent (184695 knot-ft). .TONIGHT... * Sky/Weather..............Partly cloudy (40-50 pct) then becoming mostly cloudy (45-55 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Min Temperature..........46 to 56 degs. 24 hr Trend...........Up 3 to 7 degs. * Max Humidity.............34 to 44 pct. 24 hr Trend...........Down 17 to 21 pct. * Wind (20 ft/10-min avg)..West around 15 mph in the evening becoming light. * 10000 ft MSL Wind........Southwest 20 to 25 mph. .WEDNESDAY... * Sky/Weather..............Mostly cloudy (45-55 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Max Temperature..........69 to 79 degs. 24 hr Trend...........Little change. * Min Humidity.............7 to 15 pct. 24 hr Trend...........Down 4 to 8 pct. * Wind (20 ft/10-min avg)..South 10 to 15 mph. * 10000 ft MSL Wind........Southwest 15 to 20 mph. * Mixing height............10417 ft AGL. * Transport winds..........South 16 to 19 knots. * Ventilation Category.....Excellent (197923 knot-ft). .Forecast days 3 through 7...... Winds in Days 3 through 5 are surface 20 ft/10-min avg .THURSDAY...Mostly clear. Lows 44 to 54. Highs 70 to 80. West wind around 15 mph. Minimum Humidity 9 to 15 pct. .FRIDAY...Mostly clear. Lows 45 to 55. Highs 71 to 81. Light winds. Minimum Humidity 9 to 15 pct. .SATURDAY...Mostly clear. Lows 46 to 56. Highs 73 to 83. Light winds. Minimum Humidity 11 to 19 pct. .SUNDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows 46 to 56. Highs 75 to 85. .MEMORIAL DAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 49 to 59. Highs 75 to 85. NOTE TO USERS - ZONE 153 VENTILATION CATEGORY...MIXING HEIGHT AND TRANSPORT WINDS ARE BASED ON THE POINT OF PINES LOCATION (6040 MSL) $$ AZZ154-200015- Arizona Fire Weather Zone 154 Forest Woodlands FDRA including the Sky Islandsof Southeast Arizona above 5500 feet-Coronado NF-TDC- 224 AM MST Tue May 19 2026 .TODAY... * Sky/Weather..............Mostly sunny (10-20 pct) then becoming partly cloudy (35-45 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Max Temperature..........71 to 81 degs. 24 hr Trend...........Up 2 to 5 degs. * Min Humidity.............11 to 21 pct. 24 hr Trend...........Down 6 to 10 pct. * Wind (20 ft/10-min avg)..Southwest 10 to 15 mph. * 10000 ft MSL Wind........Southwest 20 to 25 mph. * Mixing height............10661 ft AGL. * Transport winds..........Southwest 19 to 24 knots. * Ventilation Category.....Excellent (229211 knot-ft). .TONIGHT... * Sky/Weather..............Mostly cloudy (50-60 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Min Temperature..........49 to 59 degs. 24 hr Trend...........Up 2 to 5 degs. * Max Humidity.............25 to 35 pct. 24 hr Trend...........Down 16 to 20 pct. * Wind (20 ft/10-min avg)..Southwest 10 to 15 mph. * 10000 ft MSL Wind........Southwest 25 to 30 mph. .WEDNESDAY... * Sky/Weather..............Mostly cloudy (55-65 pct) then becoming partly cloudy (40-50 pct). * Chance of Precip.........0 pct. * Chance of Thunder........0 pct. * Max Temperature..........70 to 80 degs. 24 hr Trend...........Little change. * Min Humidity.............8 to 18 pct. 24 hr Trend...........Up 2 to 5 pct. * Wind (20 ft/10-min avg)..Southwest 10 to 15 mph. * 10000 ft MSL Wind........Southwest 15 to 20 mph. * Mixing height............12898 ft AGL. * Transport winds..........Southwest 16 to 20 knots. * Ventilation Category.....Excellent (232164 knot-ft). .Forecast days 3 through 7...... Winds in Days 3 through 5 are surface 20 ft/10-min avg .THURSDAY...Mostly clear. Lows 47 to 57. Highs 70 to 80. Southwest wind around 15 mph. Minimum Humidity 11 to 21 pct. .FRIDAY...Mostly clear. Lows 49 to 59. Highs 70 to 80. Southwest wind around 15 mph. Minimum Humidity 11 to 21 pct. .SATURDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows 49 to 59. Highs 71 to 81. Southwest wind around 15 mph. Minimum Humidity 18 to 28 pct. .SUNDAY...Mostly clear. Lows 50 to 60. Highs 73 to 83. .MEMORIAL DAY...Mostly clear. Slight chance of showers and thunderstorms. Lows 52 to 62. Highs 74 to 84. NOTE TO USERS - ZONE 154 VENTILATION CATEGORY...MIXING HEIGHT AND TRANSPORT WINDS ARE BASED ON THE AVERAGE ACROSS THE ZONE $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson