FNUS75 KTWC 202147 FWSTWC Spot Forecast for Shaw Fire...DFFM National Weather Service Tucson AZ 247 PM MST Mon Apr 20 2026 Forecast is based on forecast start time of 1600 MST on April 20. .DISCUSSION... Generally southwest to west winds at the fire site over the next couple days. Winds diminish this evening, though gusts a few gusts up to 15 mph possible in the late evening before winds decrease to around 5 to 8 mph after midnight. Overnight relative humidity recovery to around 28 percent tonight. Winds remain southwest on Tuesday increasing to 10 to 15 mph in the late morning and afternoon. Increased winds are expected on Wednesday in the 13 to 18 mph range with gusts to 25 mph. Minimum relative humidity around 11-14 percent each afternoon. .REST OF TODAY... Sky/weather.........Partly cloudy Chance of pcpn......0 percent. Max temperature.....79-82 degrees. Min humidity........11-14 percent. 20-foot winds.......Southwest winds 7 to 10 mph. Smoke dispersal.....Very good (77100 knot-ft). Mixing height.......11300 ft AGL. Transport winds.....Southwest around 7 knots. TIME (MST) 4 PM Sky (%).........20 Weather cov..... Weather type....NONE Tstm cov........ CWR.............0 Temp............79 RH..............13 20 FT wind......SW 7G11 Mix hgt (ft)....11300 Transport wind..SW 7 .TONIGHT... Sky/weather.........Partly cloudy. Chance of pcpn......0 percent. Min temperature.....54-57 degrees. Max humidity........25-28 percent. 20-foot winds.......West to southwest winds 6 to 10 mph. A few gusts up to 15 mph possible in the late evening. Smoke dispersal.....Good (69100 knot-ft) decreasing to poor (2400 knot-ft). Mixing height.......9900 ft AGL decreasing to 600 ft AGL. Transport winds.....West 5 to 12 knots. TIME (MST) 6 PM 9 PM MIDNGT 3 AM Sky (%).........8 14 38 33 Weather cov..... Weather type....NONE NONE NONE NONE Tstm cov........ CWR.............0 0 0 0 Temp............76 66 61 57 RH..............14 17 21 25 20 FT wind......SW 5G8 W 8G12 SW 8G14 SW 5G8 Mix hgt (ft)....9900 700 700 600 Transport wind..SW 7 W 11 W 11 W 6 .TUESDAY... Sky/weather.........Mostly sunny. Chance of pcpn......0 percent. Max temperature.....80-83 degrees. Min humidity........12-15 percent. 20-foot winds.......Southwest winds 5 to 10 mph in the morning, becoming southwest 10 to 15 mph in the afternoon. Smoke dispersal.....Poor (3000 knot-ft) early in the morning increasing to excellent (116500 knot-ft) in the afternoon. Mixing height.......1800 ft AGL increasing to 11400 ft AGL. Transport winds.....Southwest 7 to 14 knots. TIME (MST) 6 AM 9 AM NOON 3 PM Sky (%).........42 49 27 14 Weather cov..... Weather type....NONE NONE NONE NONE Tstm cov........ CWR.............0 0 0 0 Temp............57 72 78 81 RH..............26 17 15 13 20 FT wind......SW 5G7 S 5G8 SW 8G14 SW 10G16 Mix hgt (ft)....600 4400 8400 11300 Transport wind..SW 5 S 10 S 12 SW 14 Vrate kt-ft/1K..3 44 101 158 Ventrate Cat....POOR GOOD EXNT EXNT .WEDNESDAY... Mostly clear. Lows in the lower 50s. Highs around 80. Southwest winds 5 to 8 mph in the early morning becoming 13 to 18 mph with gusts to 25 mph in the late morning and afternoon. $$ Forecaster...EDWARDS Requested by...Scott Hines Type of request...WILDFIRE .TAG 2610980.0/TWC .DELDT 04/20/26 .FormatterVersion 2.0.0 .EMAIL aidclogistics@dffm.az.gov Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson