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 13-Aug-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 Wed Aug 13 2025 52F 53F / 20% WNW 13 G 15 MPH 14700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Wed Aug 13 2025 52F 53F / 17% W 13 G 15 MPH 14500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 AM Wed Aug 13 2025 51F 52F / 28% WSW 15 G 20 MPH 14400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 AM Wed Aug 13 2025 55F 53F / 16% WSW 14 G 20 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 AM Wed Aug 13 2025 58F 54F / 15% W 12 G 16 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 AM Wed Aug 13 2025 64F 55F / 12% WSW 11 G 17 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 PM Wed Aug 13 2025 68F 58F / 11% W 11 G 19 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 PM Wed Aug 13 2025 69F 59F / 9% W 11 G 19 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 PM Wed Aug 13 2025 71F 60F / 11% W 10 G 19 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 PM Wed Aug 13 2025 72F 60F / 6% W 12 G 21 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 PM Wed Aug 13 2025 69F 61F / 7% W 11 G 19 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 PM Wed Aug 13 2025 67F 60F / 7% WSW 14 G 23 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 PM Wed Aug 13 2025 66F 60F / 9% WSW 9 G 15 MPH 14400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 PM Wed Aug 13 2025 64F 59F / 7% WSW 11 G 16 MPH 14400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 PM Wed Aug 13 2025 60F 57F / 10% W 16 G 25 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 PM Wed Aug 13 2025 57F 55F / 12% W 11 G 14 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 PM Wed Aug 13 2025 53F 54F / 27% W 12 G 18 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 PM Wed Aug 13 2025 53F 52F / 29% NW 16 G 27 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 AM Thu Aug 14 2025 53F 53F / 25% W 12 G 20 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 AM Thu Aug 14 2025 54F 52F / 20% WNW 18 G 28 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 AM Thu Aug 14 2025 54F 51F / 26% WNW 16 G 24 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 AM Thu Aug 14 2025 53F 52F / 25% W 11 G 17 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 AM Thu Aug 14 2025 54F 52F / 22% W 14 G 21 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 AM Thu Aug 14 2025 53F 51F / 26% W 17 G 25 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 AM Thu Aug 14 2025 53F 52F / 25% WSW 19 G 28 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 07 AM Thu Aug 14 2025 51F 50F / 30% WSW 18 G 27 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 08 AM Thu Aug 14 2025 53F 51F / 32% WSW 19 G 28 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 09 AM Thu Aug 14 2025 55F 52F / 35% WSW 17 G 26 MPH 13900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 10 AM Thu Aug 14 2025 58F 52F / 34% WSW 12 G 22 MPH 13900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 11 AM Thu Aug 14 2025 61F 53F / 28% SW 10 G 20 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 12 PM Thu Aug 14 2025 64F 56F / 26% SW 10 G 22 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 01 PM Thu Aug 14 2025 64F 55F / 27% SW 14 G 26 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 02 PM Thu Aug 14 2025 64F 54F / 26% WSW 14 G 24 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 03 PM Thu Aug 14 2025 67F 56F / 22% WSW 12 G 24 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 04 PM Thu Aug 14 2025 67F 57F / 20% SW 10 G 21 MPH 13900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 05 PM Thu Aug 14 2025 66F 58F / 26% S 9 G 18 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 06 PM Thu Aug 14 2025 55F 52F / 44% WSW 11 G 18 MPH 14000 FT 0:1 / -% 0.01" / 0.0" 0.01" / 0.0" 37 07 PM Thu Aug 14 2025 61F 57F / 34% WSW 13 G 22 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 38 08 PM Thu Aug 14 2025 56F 54F / 47% SW 12 G 18 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 39 09 PM Thu Aug 14 2025 53F 52F / 44% SSW 12 G 20 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 40 10 PM Thu Aug 14 2025 53F 52F / 48% NW 13 G 23 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 41 11 PM Thu Aug 14 2025 53F 52F / 40% SSE 12 G 20 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 42 12 AM Fri Aug 15 2025 53F 51F / 39% SSW 16 G 25 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 43 01 AM Fri Aug 15 2025 51F 51F / 47% SW 16 G 25 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 44 02 AM Fri Aug 15 2025 53F 51F / 36% SW 16 G 27 MPH 13900 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 45 03 AM Fri Aug 15 2025 51F 50F / 38% SSW 16 G 24 MPH 13800 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 46 04 AM Fri Aug 15 2025 50F 50F / 47% S 15 G 27 MPH 13800 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 47 05 AM Fri Aug 15 2025 49F 50F / 40% SSW 17 G 29 MPH 13700 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 48 06 AM Fri Aug 15 2025 48F 48F / 42% SSW 19 G 27 MPH 13700 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0"