ALTA/LITTLE COTTONWOOD CANYON HRRR-DERIVED FORECAST GUIDANCE *************************************************************** * THIS IS AN EXPERIMENTAL, AUTOMATED, AND UNOFFICIAL FORECAST * *************************************************************** CREATED/MAINTAINED BY THE STEENBURGH GROUP DEPARTMENT OF ATMOSPHERIC SCIENCES UNIVERSITY OF UTAH Contact: jim.steenburgh@utah.edu WETBULBZERO, 1H QPF, ACCUM QPF DIRECTLY FROM HRRR COLLINS SNOW RATIO/H2O, MT BALDY T/RH, MT BALDY WIND, 1H SNOW, and ACCUM SNOW based on machine learning including UU RF SLR algorithm Based on 12Z 02-Oct-2025 intialized HRRR FORECAST HOURS 0-48 FHR VALID MOUNTAIN TIME COLLINS T MT BALDY T/RH MT BALDY WIND WETBULBZERO SLR/H2O 1H QPF / 1H SNOW / ACCUM QPF / ACCUM SNOW 0 06 AM Thu Oct 02 2025 40F 39F / 54% S 22 G 37 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Thu Oct 02 2025 40F 39F / 56% S 21 G 38 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 AM Thu Oct 02 2025 40F 39F / 54% S 21 G 37 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 AM Thu Oct 02 2025 42F 40F / 51% S 20 G 38 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 AM Thu Oct 02 2025 45F 41F / 46% S 19 G 38 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 AM Thu Oct 02 2025 48F 42F / 40% S 18 G 37 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 PM Thu Oct 02 2025 51F 43F / 35% S 16 G 34 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 PM Thu Oct 02 2025 53F 45F / 31% S 16 G 34 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 PM Thu Oct 02 2025 54F 45F / 29% S 13 G 33 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 PM Thu Oct 02 2025 55F 46F / 31% S 14 G 31 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 PM Thu Oct 02 2025 54F 46F / 28% S 13 G 31 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 PM Thu Oct 02 2025 54F 47F / 23% S 15 G 32 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 PM Thu Oct 02 2025 52F 47F / 24% S 13 G 29 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 PM Thu Oct 02 2025 48F 45F / 26% S 13 G 28 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 PM Thu Oct 02 2025 46F 44F / 29% SSE 15 G 29 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 PM Thu Oct 02 2025 45F 43F / 35% SSE 14 G 26 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 PM Thu Oct 02 2025 45F 42F / 32% S 17 G 33 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 PM Thu Oct 02 2025 45F 41F / 38% S 17 G 34 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 AM Fri Oct 03 2025 44F 41F / 43% S 17 G 37 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 AM Fri Oct 03 2025 44F 40F / 44% S 18 G 39 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 AM Fri Oct 03 2025 44F 39F / 52% S 20 G 41 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 AM Fri Oct 03 2025 44F 40F / 55% S 19 G 45 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 AM Fri Oct 03 2025 44F 39F / 52% S 21 G 45 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 AM Fri Oct 03 2025 43F 40F / 63% S 22 G 44 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 AM Fri Oct 03 2025 43F 39F / 66% S 22 G 45 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 07 AM Fri Oct 03 2025 42F 38F / 67% S 22 G 44 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 08 AM Fri Oct 03 2025 42F 38F / 74% SSW 22 G 45 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 09 AM Fri Oct 03 2025 44F 38F / 74% S 20 G 42 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 10 AM Fri Oct 03 2025 45F 38F / 74% S 19 G 39 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 11 AM Fri Oct 03 2025 47F 39F / 66% S 17 G 39 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 12 PM Fri Oct 03 2025 49F 40F / 55% S 17 G 42 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 01 PM Fri Oct 03 2025 50F 40F / 56% S 18 G 44 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 02 PM Fri Oct 03 2025 51F 41F / 51% S 15 G 39 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 03 PM Fri Oct 03 2025 49F 40F / 59% S 15 G 36 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 04 PM Fri Oct 03 2025 49F 41F / 68% SSW 18 G 41 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 05 PM Fri Oct 03 2025 47F 39F / 80% S 15 G 31 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 06 PM Fri Oct 03 2025 46F 39F / 69% SSW 14 G 29 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 07 PM Fri Oct 03 2025 44F 40F / 71% SSW 15 G 29 MPH 10700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 08 PM Fri Oct 03 2025 43F 40F / 60% SSW 16 G 30 MPH 10600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 09 PM Fri Oct 03 2025 42F 39F / 53% SW 15 G 30 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 10 PM Fri Oct 03 2025 38F 34F / 100% WSW 12 G 27 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 11 PM Fri Oct 03 2025 38F 34F / 87% SSW 9 G 20 MPH 10900 FT 0:1 / -% 0.01" / 0.0" 0.01" / 0.0" 42 12 AM Sat Oct 04 2025 37F 33F / 89% S 14 G 28 MPH 10600 FT 0:1 / -% 0.01" / 0.0" 0.02" / 0.0" 43 01 AM Sat Oct 04 2025 37F 33F / 85% SSE 13 G 26 MPH 10500 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 44 02 AM Sat Oct 04 2025 38F 33F / 83% SSE 10 G 23 MPH 10500 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 45 03 AM Sat Oct 04 2025 35F 31F / 95% SE 13 G 25 MPH 10400 FT 0:1 / -% 0.06" / 0.0" 0.08" / 0.0" 46 04 AM Sat Oct 04 2025 35F 29F / 99% ESE 11 G 19 MPH 9900 FT 7:1 / 14% 0.00" / 0.0" 0.08" / 0.0" 47 05 AM Sat Oct 04 2025 32F 26F / 93% W 16 G 25 MPH 9200 FT 8:1 / 12% 0.29" / 2.3" 0.37" / 2.3" 48 06 AM Sat Oct 04 2025 30F 26F / 95% SW 12 G 25 MPH 9400 FT 8:1 / 12% 0.28" / 2.2" 0.65" / 4.5"