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 18Z 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 12 PM Wed Aug 13 2025 67F 58F / 15% WSW 10 G 18 MPH 13700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 01 PM Wed Aug 13 2025 69F 59F / 11% WSW 10 G 18 MPH 13800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 02 PM Wed Aug 13 2025 70F 59F / 7% WSW 10 G 19 MPH 13900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 03 PM Wed Aug 13 2025 70F 60F / 11% WSW 10 G 19 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 04 PM Wed Aug 13 2025 71F 61F / 11% WSW 10 G 16 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 05 PM Wed Aug 13 2025 68F 60F / 9% WSW 12 G 22 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 06 PM Wed Aug 13 2025 65F 60F / 12% SW 9 G 15 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 07 PM Wed Aug 13 2025 64F 59F / 10% W 14 G 21 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 08 PM Wed Aug 13 2025 60F 57F / 17% W 14 G 20 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 09 PM Wed Aug 13 2025 58F 56F / 15% W 13 G 20 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 10 PM Wed Aug 13 2025 54F 53F / 28% WNW 13 G 22 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 11 PM Wed Aug 13 2025 53F 52F / 34% E 17 G 24 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 12 AM Thu Aug 14 2025 53F 53F / 31% WNW 14 G 22 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 01 AM Thu Aug 14 2025 54F 53F / 22% WNW 16 G 26 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 02 AM Thu Aug 14 2025 54F 52F / 28% WNW 14 G 22 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 03 AM Thu Aug 14 2025 53F 51F / 28% W 12 G 15 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 04 AM Thu Aug 14 2025 53F 52F / 27% WSW 16 G 23 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 05 AM Thu Aug 14 2025 52F 52F / 25% WSW 22 G 36 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 06 AM Thu Aug 14 2025 51F 50F / 28% SW 20 G 30 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 07 AM Thu Aug 14 2025 51F 50F / 35% WSW 19 G 28 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 08 AM Thu Aug 14 2025 53F 51F / 35% WSW 18 G 27 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 09 AM Thu Aug 14 2025 55F 52F / 34% WSW 17 G 28 MPH 13900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 10 AM Thu Aug 14 2025 58F 52F / 24% WSW 14 G 24 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 11 AM Thu Aug 14 2025 62F 53F / 26% SW 12 G 24 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 12 PM Thu Aug 14 2025 64F 54F / 31% WSW 11 G 22 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 01 PM Thu Aug 14 2025 64F 55F / 26% SW 13 G 23 MPH 14400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 02 PM Thu Aug 14 2025 67F 56F / 20% WSW 11 G 23 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 03 PM Thu Aug 14 2025 65F 55F / 39% W 16 G 30 MPH 13900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 04 PM Thu Aug 14 2025 61F 53F / 36% SW 11 G 21 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 05 PM Thu Aug 14 2025 63F 54F / 35% W 12 G 23 MPH 13900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 06 PM Thu Aug 14 2025 61F 55F / 33% WSW 11 G 20 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 07 PM Thu Aug 14 2025 56F 52F / 57% WSW 12 G 18 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 08 PM Thu Aug 14 2025 54F 50F / 54% SW 13 G 20 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 09 PM Thu Aug 14 2025 52F 50F / 45% WSW 12 G 18 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 10 PM Thu Aug 14 2025 52F 50F / 37% SW 14 G 23 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 11 PM Thu Aug 14 2025 52F 50F / 33% WSW 14 G 22 MPH 14100 FT 0:1 / -% 0.01" / 0.0" 0.01" / 0.0" 36 12 AM Fri Aug 15 2025 52F 48F / 46% SSW 13 G 22 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 37 01 AM Fri Aug 15 2025 52F 51F / 40% SSW 15 G 25 MPH 14100 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 38 02 AM Fri Aug 15 2025 52F 52F / 46% S 14 G 22 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 39 03 AM Fri Aug 15 2025 51F 50F / 43% S 14 G 21 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 40 04 AM Fri Aug 15 2025 51F 51F / 41% S 16 G 26 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 41 05 AM Fri Aug 15 2025 50F 49F / 41% S 17 G 29 MPH 13700 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 42 06 AM Fri Aug 15 2025 50F 49F / 44% S 20 G 34 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 43 07 AM Fri Aug 15 2025 49F 49F / 51% SSW 18 G 30 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 44 08 AM Fri Aug 15 2025 49F 49F / 40% SSW 21 G 30 MPH 13800 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 45 09 AM Fri Aug 15 2025 51F 49F / 42% SSW 16 G 29 MPH 13800 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 46 10 AM Fri Aug 15 2025 54F 50F / 39% SSW 13 G 24 MPH 13800 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 47 11 AM Fri Aug 15 2025 58F 50F / 38% SW 13 G 22 MPH 13700 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 48 12 PM Fri Aug 15 2025 62F 53F / 31% SW 10 G 21 MPH 13700 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0"