Spot Forecast
Issued by NWS Tucson, AZ
Issued by NWS Tucson, AZ
292
FNUS75 KTWC 111852
FWSTWC
Spot Forecast for Catalina Piles RX...USDA / USFS
National Weather Service Tucson AZ
1152 AM MST Tue Mar 11 2025
Forecast is based on ignition time of 1800 MST on March 11.
.DISCUSSION...A series of weather systems will impact the Catalina
mountains over this week. The first system brings chances for snow
showers beginning tonight at 11 PM MST continuing through 11 AM
MST Wednesday with the best chances overnight into the early
morning. Snowfall totals with this first system range from
4-6 inches. A second system (and most impactful system) comes in
Thursday and Friday. Thursday afternoon surface winds at W/SW at
25-35 mph with gusts up to 45 mph. The snowfall totals with this
second system 5-8 inches. A third system late Friday into
Saturday morning has a current rainfall total of 1-3 inches.
.TONIGHT...
Sky/weather.........Mostly clear then becoming mostly cloudy.
Chance of snow showers late in the evening.
Snow showers overnight, then snow showers
likely after 3 am.
Chance of pcpn......10 percent increasing to 40 percent late in the
evening, then increasing 100 percent overnight
decreasing to percent after 3 am.
Min temperature.....32-35 degrees.
Max humidity........83-86 percent.
20-foot winds.......Southwest winds 13 to 18 mph. Gusts up to 35
mph decreasing to 25 mph early in the morning.
Mixing height.......5700 ft AGL decreasing to 200 ft AGL.
Transport winds.....Southwest 14 to 23 knots increasing to 24 to 28
knots overnight.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........9 12 55 55 55 95 95 95 98 98 98 79
Weather cov..... CHC DEF DEF DEF DEF LKY LKY
Weather type.... SW SW SW SW SW SW SW
Tstm cov........
CWR.............0 0 0 0 10 40 80 100 90 80 60 60
Temp............44 40 38 37 36 34 34 34 33 34 34 34
RH..............24 30 36 45 56 71 74 80 83 81 80 80
20 FT wind dir..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT wind spd..18 17 15 15 15 13 14 14 14 13 12 11
20 FT wind gust.28 28 25 25 24 23 23 23 24 23 22 20
Mix hgt (kft)...5.7 3.0 0.2 0.2 0.2 0.2 0.6 1.0 1.4 1.5 1.5 1.6
Transp wind dir.SW SW SW SW SW SW SW SW SW SW W W
Transp wind spd.23 19 16 15 15 14 17 20 24 25 27 28
.WEDNESDAY...
Sky/weather.........Mostly cloudy then becoming sunny. Snow showers
likely early in the morning, then chance of
snow showers early in the morning.
Chance of pcpn......60 percent decreasing to 0 percent.
Max temperature.....51-54 degrees.
Min humidity........51-54 percent.
20-foot winds.......Southwest winds 7 to 12 mph. Gusts up to 23 mph
early in the morning.
Mixing height.......3400 ft AGL increasing to 5400 ft AGL late in
the morning.
Transport winds.....West 15 to 24 knots decreasing to 12 to 17
knots in the late morning and afternoon.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........77 79 73 69 69 29 21 18 16 14 12 12
Weather cov.....LKY LKY CHC CHC CHC
Weather type....SW SW SW SW SW
Tstm cov........
CWR.............60 60 50 50 50 0 0 0 0 0 0 0
Temp............33 33 35 37 40 44 48 50 51 52 50 46
RH..............82 84 78 78 73 66 61 57 54 52 52 53
20 FT wind dir..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT wind spd..10 9 8 8 7 7 6 6 6 6 6 6
20 FT wind gust.18 17 16 14 14 14 14 14 14 14 14 14
Mix hgt (kft)...1.8 1.9 2.1 2.8 3.4 4.0 4.4 4.8 5.1 5.2 5.3 5.4
Transp wind dir.W W W W W W W W W W SW SW
Transp wind spd.24 19 15 14 13 12 14 15 17 17 17 17
.WEDNESDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of pcpn......0 percent.
Min temperature.....34-37 degrees.
Max humidity........70-73 percent.
20-foot winds.......Southwest winds 5 to 10 mph.
Mixing height.......2000 ft AGL decreasing to 100 ft AGL early in
the evening.
Transport winds.....Southwest 5 to 13 knots decreasing to 7 to 8
knots overnight.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........16 22 27 30 32 33 36 38 41 42 41 35
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............41 37 37 37 36 36 36 37 36 36 35 35
RH..............57 64 70 71 71 70 70 70 70 69 66 65
20 FT wind dir..W W W W SW SW SW S S S SW SW
20 FT wind spd..6 6 6 6 5 5 5 6 6 6 7 7
20 FT wind gust.13 12 11 10 10 10 10 10 11 11 12 13
Mix hgt (kft)...3.7 2.0 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.1 0.1 0.1
Transp wind dir.W W W W SW SW SW S S S SW SW
Transp wind spd.13 10 6 6 5 5 6 6 7 7 8 8
.THURSDAY...
Sky/weather.........Sunny then becoming mostly cloudy. Chance of
rain showers late in the morning. Snow showers
late in the afternoon.
Chance of pcpn......0 percent increasing to 100 percent.
Max temperature.....51-54 degrees.
Min humidity........44-47 percent.
20-foot winds.......Breezy. Southwest winds 14 to 19 mph with gusts
to around 39 mph.
Mixing height.......1900 ft AGL increasing to 4500 ft AGL late in
the morning, then increasing to 7100 ft AGL
late in the morning increasing to 7800 ft AGL
early in the afternoon decreasing to 5000 ft
AGL.
Transport winds.....Southwest 16 to 23 knots increasing to around
53 knots.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........29 23 17 20 24 73 73 73 73 73 73 98
Weather cov..... CHC CHC CHC CHC CHC CHC DEF
Weather type.... RW RW RW RW RW RW SW
Tstm cov........
CWR.............0 0 0 0 0 60 60 60 60 60 60 100
Temp............35 36 39 42 45 49 51 52 50 47 42 38
RH..............63 62 59 55 50 47 45 45 47 53 63 74
20 FT wind dir..SW SW S S SW SW SW SW SW SW SW SW
20 FT wind spd..8 10 11 13 14 16 17 18 19 20 21 22
20 FT wind gust.14 17 19 23 26 30 31 33 35 37 38 39
Mix hgt (kft)...0.7 1.3 1.9 3.2 4.5 5.8 6.5 7.1 7.8 6.4 5.0 3.6
Transp wind dir.SW SW SW SW SW SW SW SW SW SW SW SW
Transp wind spd.16 23 31 34 37 39 42 44 47 49 51 53
$$
Forecaster...TETRAULT
Requested by...Megan Smedley
Type of request...PRESCRIBED
.TAG 2505938.0/TWC
.DELDT 03/11/25
.FormatterVersion 2.0.0
.EMAIL ashleigh.dantonio@usda.gov
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