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 21-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 Thu Aug 21 2025 56F 55F / 27% SW 16 G 24 MPH 15400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Thu Aug 21 2025 55F 55F / 18% WSW 14 G 21 MPH 15500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 AM Thu Aug 21 2025 56F 55F / 28% WSW 14 G 20 MPH 15000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 AM Thu Aug 21 2025 58F 56F / 17% W 13 G 19 MPH 15400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 AM Thu Aug 21 2025 60F 56F / 20% WSW 11 G 16 MPH 15500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 AM Thu Aug 21 2025 65F 57F / 25% WSW 9 G 16 MPH 15400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 PM Thu Aug 21 2025 67F 58F / 24% W 9 G 17 MPH 15400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 PM Thu Aug 21 2025 67F 58F / 22% WSW 8 G 16 MPH 15500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 PM Thu Aug 21 2025 67F 57F / 29% WSW 9 G 20 MPH 15400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 PM Thu Aug 21 2025 68F 57F / 27% W 10 G 19 MPH 15600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 PM Thu Aug 21 2025 65F 58F / 33% W 13 G 23 MPH 15500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 PM Thu Aug 21 2025 63F 57F / 34% WSW 16 G 25 MPH 15500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 PM Thu Aug 21 2025 62F 57F / 32% WSW 10 G 17 MPH 15400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 PM Thu Aug 21 2025 62F 57F / 30% W 16 G 25 MPH 15400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 PM Thu Aug 21 2025 58F 55F / 42% W 15 G 22 MPH 15500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 PM Thu Aug 21 2025 57F 56F / 32% WSW 14 G 19 MPH 15500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 PM Thu Aug 21 2025 57F 55F / 35% WSW 14 G 21 MPH 15400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 PM Thu Aug 21 2025 56F 55F / 35% WSW 14 G 20 MPH 15300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 AM Fri Aug 22 2025 55F 54F / 40% WSW 12 G 19 MPH 15300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 AM Fri Aug 22 2025 55F 54F / 37% SW 13 G 20 MPH 15200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 AM Fri Aug 22 2025 55F 53F / 41% SSW 14 G 21 MPH 15200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 AM Fri Aug 22 2025 55F 53F / 44% SSW 13 G 21 MPH 15100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 AM Fri Aug 22 2025 55F 53F / 38% WSW 15 G 23 MPH 15000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 AM Fri Aug 22 2025 54F 52F / 46% WSW 15 G 22 MPH 15000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 AM Fri Aug 22 2025 53F 52F / 46% W 17 G 23 MPH 15000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 07 AM Fri Aug 22 2025 52F 52F / 42% W 17 G 24 MPH 15000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 08 AM Fri Aug 22 2025 53F 52F / 42% W 17 G 24 MPH 15100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 09 AM Fri Aug 22 2025 56F 53F / 49% W 16 G 23 MPH 15100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 10 AM Fri Aug 22 2025 59F 54F / 45% W 12 G 20 MPH 15200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 11 AM Fri Aug 22 2025 62F 55F / 38% W 10 G 18 MPH 15200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 12 PM Fri Aug 22 2025 63F 56F / 37% W 11 G 22 MPH 15300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 01 PM Fri Aug 22 2025 66F 57F / 31% W 13 G 23 MPH 15400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 02 PM Fri Aug 22 2025 67F 56F / 34% W 13 G 22 MPH 15400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 03 PM Fri Aug 22 2025 66F 56F / 32% W 16 G 29 MPH 15300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 04 PM Fri Aug 22 2025 65F 56F / 35% W 15 G 26 MPH 15100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 05 PM Fri Aug 22 2025 66F 57F / 43% W 12 G 20 MPH 15100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 06 PM Fri Aug 22 2025 63F 57F / 44% W 14 G 22 MPH 15100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 07 PM Fri Aug 22 2025 63F 59F / 44% W 14 G 23 MPH 15100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 08 PM Fri Aug 22 2025 58F 57F / 52% W 13 G 19 MPH 15100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 09 PM Fri Aug 22 2025 55F 55F / 46% W 12 G 18 MPH 15000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 10 PM Fri Aug 22 2025 54F 54F / 63% W 16 G 20 MPH 15000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 11 PM Fri Aug 22 2025 53F 53F / 53% S 13 G 22 MPH 15000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 12 AM Sat Aug 23 2025 52F 52F / 55% WSW 15 G 18 MPH 15000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 01 AM Sat Aug 23 2025 51F 53F / 57% WNW 12 G 17 MPH 14900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 02 AM Sat Aug 23 2025 53F 53F / 50% NW 11 G 14 MPH 14900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 03 AM Sat Aug 23 2025 53F 53F / 44% WNW 12 G 14 MPH 14900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 04 AM Sat Aug 23 2025 53F 53F / 44% W 12 G 16 MPH 14800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 05 AM Sat Aug 23 2025 52F 53F / 46% W 12 G 16 MPH 14700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 06 AM Sat Aug 23 2025 51F 52F / 44% W 14 G 17 MPH 14400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"