865
FNUS75 KTWC 302131
FWSTWC

Spot Forecast for Sweetwater Burn...Tucson Fire Dept.
National Weather Service Tucson AZ
231 PM MST Mon Sep 30 2024

Forecast is based on ignition time of 1400 MST on September 30.

.DISCUSSION...Hot, dry, and breezy through the week. Wind today will
generally be light and switch from the southeast to northwest late
in the afternoon. There is a low probability that weak dry-storms to the
northeast of Tucson will produce an organized outflow to 25 mph from the
northeast during the early evening. Otherwise...expect breezy easterly
winds Tuesday afternoon with occasional gusts up to 25 mph. Afternoon
relative humidity percentages will be in the low teens with overnight
recoveries into the 30s.

.REST OF TODAY...

Sky/weather.........Partly sunny.
Chance of pcpn......0 percent.
Max temperature.....103-106 degrees.
Min humidity........10-13 percent.
20-foot winds.......Southeast winds 4 to 6 mph becoming northwest during
                    the late afternoon.
Mixing height.......14100 ft AGL.
Transport winds.....Northeast around 9 knots.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

.TONIGHT...

Sky/weather.........Partly cloudy becoming mostly clear.
Chance of pcpn......0 percent.
Min temperature.....73-76 degrees.
Max humidity........36-39 percent.
20-foot winds.......Northwest winds 5 to 9 mph shifting to the
                    southeast 4 to 7 mph overnight. Note: There is a low probability
                    that an organized gust to 25 mph from the northeast will
                    impact the area of the RX burn early this evening.
Mixing height.......8600 ft AGL decreasing to 100 ft AGL.
Transport winds.....North around 9 knots shifting to the south
                    around 5 knots overnight.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

.TUESDAY...

Sky/weather.........Partly sunny.
Chance of pcpn......0 percent. 5 percent in the afternoon.
Max temperature.....105-108 degrees.
Min humidity........11-14 percent.
20-foot winds.......Southeast wind 5 to 8 mph in the morning becoming
                    east 9 to 13 mph with gusts to around 25 mph in the afternoon.
Mixing height.......700 ft AGL increasing to 13900 ft AGL in the
                    afternoon.
Transport winds.....Southeast 8 to 14 knots.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

$$
Forecaster...RASMUSSEN
Requested by...K Paul Maxwell
Type of request...PRESCRIBED
.TAG 2423311.0/TWC
.DELDT 09/30/24
.FormatterVersion 2.0.0
.EMAIL kenneth.maxwell@tucsonaz.gov

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