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 00Z 03-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 PM Thu Oct 02 2025 54F 48F / 36% SSE 10 G 24 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 PM Thu Oct 02 2025 50F 46F / 35% SSE 12 G 28 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 PM Thu Oct 02 2025 47F 45F / 34% SSE 13 G 26 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 PM Thu Oct 02 2025 46F 43F / 39% S 13 G 26 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 PM Thu Oct 02 2025 46F 43F / 40% S 16 G 33 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 PM Thu Oct 02 2025 46F 43F / 40% S 18 G 37 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 AM Fri Oct 03 2025 45F 42F / 41% S 18 G 36 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 AM Fri Oct 03 2025 44F 41F / 46% S 19 G 40 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 AM Fri Oct 03 2025 45F 41F / 51% SSE 18 G 41 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 AM Fri Oct 03 2025 44F 40F / 51% S 20 G 43 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 AM Fri Oct 03 2025 44F 40F / 56% S 22 G 46 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 AM Fri Oct 03 2025 43F 39F / 64% SSW 24 G 46 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 AM Fri Oct 03 2025 43F 39F / 64% SSW 24 G 46 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 AM Fri Oct 03 2025 43F 38F / 71% SSW 23 G 48 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 AM Fri Oct 03 2025 43F 38F / 69% SSW 23 G 46 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 AM Fri Oct 03 2025 44F 39F / 77% S 21 G 45 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 AM Fri Oct 03 2025 45F 39F / 74% S 18 G 41 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 AM Fri Oct 03 2025 48F 40F / 66% S 18 G 40 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 PM Fri Oct 03 2025 50F 41F / 58% S 17 G 40 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 PM Fri Oct 03 2025 52F 42F / 55% S 17 G 44 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 PM Fri Oct 03 2025 53F 43F / 50% S 17 G 39 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 PM Fri Oct 03 2025 53F 43F / 46% S 14 G 35 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 PM Fri Oct 03 2025 52F 43F / 50% SSW 15 G 32 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 PM Fri Oct 03 2025 51F 43F / 52% SSW 17 G 38 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 PM Fri Oct 03 2025 45F 40F / 72% S 16 G 34 MPH 12300 FT 0:1 / -% 0.02" / 0.0" 0.02" / 0.0" 25 07 PM Fri Oct 03 2025 45F 41F / 69% S 14 G 32 MPH 12200 FT 0:1 / -% 0.01" / 0.0" 0.03" / 0.0" 26 08 PM Fri Oct 03 2025 44F 40F / 74% SW 19 G 39 MPH 12100 FT 0:1 / -% 0.01" / 0.0" 0.04" / 0.0" 27 09 PM Fri Oct 03 2025 43F 38F / 68% SSW 16 G 36 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.04" / 0.0" 28 10 PM Fri Oct 03 2025 42F 37F / 64% SSW 15 G 33 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.04" / 0.0" 29 11 PM Fri Oct 03 2025 40F 35F / 77% SSW 12 G 27 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.04" / 0.0" 30 12 AM Sat Oct 04 2025 41F 36F / 66% S 14 G 29 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.04" / 0.0" 31 01 AM Sat Oct 04 2025 41F 36F / 62% SSW 14 G 31 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.04" / 0.0" 32 02 AM Sat Oct 04 2025 41F 35F / 66% S 14 G 28 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.04" / 0.0" 33 03 AM Sat Oct 04 2025 40F 35F / 68% SSE 13 G 28 MPH 10700 FT 0:1 / -% 0.00" / 0.0" 0.04" / 0.0" 34 04 AM Sat Oct 04 2025 39F 34F / 75% SE 13 G 32 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.04" / 0.0" 35 05 AM Sat Oct 04 2025 38F 33F / 80% SSE 15 G 31 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.04" / 0.0" 36 06 AM Sat Oct 04 2025 37F 32F / 95% SSE 13 G 28 MPH 10300 FT 0:1 / -% 0.00" / 0.0" 0.04" / 0.0" 37 07 AM Sat Oct 04 2025 34F 28F / 100% SW 9 G 17 MPH 9200 FT 9:1 / 11% 0.01" / 0.1" 0.05" / 0.1" 38 08 AM Sat Oct 04 2025 32F 27F / 89% SSW 14 G 29 MPH 9300 FT 6:1 / 17% 0.16" / 1.0" 0.21" / 1.1" 39 09 AM Sat Oct 04 2025 32F 26F / 93% WSW 14 G 26 MPH 9200 FT 7:1 / 14% 0.03" / 0.2" 0.24" / 1.3" 40 10 AM Sat Oct 04 2025 32F 27F / 89% SSW 11 G 20 MPH 9100 FT 9:1 / 11% 0.02" / 0.2" 0.26" / 1.5" 41 11 AM Sat Oct 04 2025 35F 28F / 89% SSW 11 G 20 MPH 9100 FT 9:1 / 11% 0.00" / 0.0" 0.26" / 1.5" 42 12 PM Sat Oct 04 2025 38F 30F / 84% SW 9 G 18 MPH 9300 FT 9:1 / 11% 0.00" / 0.0" 0.26" / 1.5" 43 01 PM Sat Oct 04 2025 37F 31F / 82% WSW 11 G 22 MPH 9400 FT 8:1 / 12% 0.00" / 0.0" 0.26" / 1.5" 44 02 PM Sat Oct 04 2025 37F 30F / 79% WSW 14 G 25 MPH 9300 FT 8:1 / 12% 0.02" / 0.2" 0.28" / 1.7" 45 03 PM Sat Oct 04 2025 36F 29F / 97% W 19 G 33 MPH 9000 FT 7:1 / 14% 0.10" / 0.7" 0.38" / 2.4" 46 04 PM Sat Oct 04 2025 34F 27F / 98% W 21 G 35 MPH 8900 FT 7:1 / 14% 0.05" / 0.4" 0.43" / 2.8" 47 05 PM Sat Oct 04 2025 32F 25F / 100% W 19 G 32 MPH 8900 FT 7:1 / 14% 0.05" / 0.4" 0.48" / 3.2" 48 06 PM Sat Oct 04 2025 32F 26F / 100% W 21 G 32 MPH 9000 FT 7:1 / 14% 0.01" / 0.1" 0.49" / 3.3"