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 02-Sep-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 Tue Sep 02 2025 63F 54F / 22% NW 8 G 13 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 01 PM Tue Sep 02 2025 65F 56F / 19% WNW 9 G 15 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 02 PM Tue Sep 02 2025 67F 56F / 9% WNW 11 G 19 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 03 PM Tue Sep 02 2025 66F 56F / 14% WNW 14 G 23 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 04 PM Tue Sep 02 2025 65F 56F / 17% WNW 14 G 21 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 05 PM Tue Sep 02 2025 64F 57F / 15% WNW 15 G 23 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 06 PM Tue Sep 02 2025 61F 56F / 17% WNW 15 G 23 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 07 PM Tue Sep 02 2025 58F 54F / 20% WNW 16 G 22 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 08 PM Tue Sep 02 2025 53F 51F / 34% NW 16 G 24 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 09 PM Tue Sep 02 2025 51F 50F / 32% N 16 G 21 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 10 PM Tue Sep 02 2025 50F 50F / 28% ENE 16 G 21 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 11 PM Tue Sep 02 2025 50F 49F / 31% ENE 15 G 20 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 12 AM Wed Sep 03 2025 49F 50F / 24% WNW 13 G 17 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 01 AM Wed Sep 03 2025 50F 49F / 23% NNW 13 G 19 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 02 AM Wed Sep 03 2025 49F 49F / 25% SSE 12 G 16 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 03 AM Wed Sep 03 2025 48F 48F / 26% W 13 G 15 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 04 AM Wed Sep 03 2025 48F 47F / 28% NW 13 G 16 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 05 AM Wed Sep 03 2025 47F 47F / 28% NW 13 G 18 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 06 AM Wed Sep 03 2025 47F 47F / 30% NW 16 G 21 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 07 AM Wed Sep 03 2025 46F 46F / 31% NNW 17 G 23 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 08 AM Wed Sep 03 2025 46F 47F / 34% NNW 15 G 23 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 09 AM Wed Sep 03 2025 48F 47F / 27% NW 15 G 21 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 10 AM Wed Sep 03 2025 53F 49F / 22% NNW 10 G 17 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 11 AM Wed Sep 03 2025 58F 50F / 17% NNW 9 G 17 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 12 PM Wed Sep 03 2025 61F 52F / 16% NNW 9 G 16 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 01 PM Wed Sep 03 2025 63F 53F / 14% NW 8 G 13 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 02 PM Wed Sep 03 2025 65F 55F / 10% W 6 G 13 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 03 PM Wed Sep 03 2025 66F 56F / 9% WNW 9 G 15 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 04 PM Wed Sep 03 2025 66F 55F / 7% NW 9 G 17 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 05 PM Wed Sep 03 2025 65F 55F / 14% NW 11 G 20 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 06 PM Wed Sep 03 2025 61F 55F / 17% WNW 9 G 19 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 07 PM Wed Sep 03 2025 57F 53F / 22% NW 13 G 21 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 08 PM Wed Sep 03 2025 52F 50F / 32% NW 15 G 19 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 09 PM Wed Sep 03 2025 51F 50F / 23% NW 16 G 25 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 10 PM Wed Sep 03 2025 51F 50F / 23% NW 15 G 25 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 11 PM Wed Sep 03 2025 50F 49F / 22% NW 15 G 23 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 12 AM Thu Sep 04 2025 50F 49F / 23% NW 14 G 23 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 01 AM Thu Sep 04 2025 50F 50F / 29% NNW 14 G 26 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 02 AM Thu Sep 04 2025 49F 50F / 30% NNW 15 G 22 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 03 AM Thu Sep 04 2025 49F 49F / 25% NW 16 G 20 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 04 AM Thu Sep 04 2025 49F 50F / 28% WNW 14 G 18 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 05 AM Thu Sep 04 2025 49F 49F / 22% WNW 15 G 20 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 06 AM Thu Sep 04 2025 48F 49F / 20% WNW 15 G 20 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 07 AM Thu Sep 04 2025 47F 48F / 30% WNW 15 G 19 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 08 AM Thu Sep 04 2025 46F 47F / 22% NW 14 G 19 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 09 AM Thu Sep 04 2025 49F 49F / 18% WNW 13 G 19 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 10 AM Thu Sep 04 2025 54F 50F / 10% NNE 10 G 16 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 11 AM Thu Sep 04 2025 59F 51F / 12% NW 8 G 13 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 12 PM Thu Sep 04 2025 63F 54F / 15% W 7 G 15 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"