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 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 06 AM Tue Sep 02 2025 48F 48F / 26% WNW 13 G 16 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Tue Sep 02 2025 48F 48F / 20% WNW 12 G 15 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 AM Tue Sep 02 2025 49F 48F / 25% W 13 G 16 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 AM Tue Sep 02 2025 49F 49F / 19% WNW 12 G 16 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 AM Tue Sep 02 2025 54F 50F / 18% WNW 11 G 15 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 AM Tue Sep 02 2025 59F 52F / 16% WNW 10 G 15 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 PM Tue Sep 02 2025 62F 53F / 17% WNW 10 G 17 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 PM Tue Sep 02 2025 64F 54F / 15% WNW 11 G 19 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 PM Tue Sep 02 2025 66F 55F / 12% WNW 13 G 22 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 PM Tue Sep 02 2025 67F 56F / 12% WNW 14 G 23 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 PM Tue Sep 02 2025 65F 56F / 12% WNW 14 G 22 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 PM Tue Sep 02 2025 64F 56F / 13% WNW 16 G 23 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 PM Tue Sep 02 2025 61F 56F / 13% WNW 13 G 22 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 PM Tue Sep 02 2025 58F 54F / 20% WNW 14 G 20 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 PM Tue Sep 02 2025 53F 51F / 22% NW 12 G 19 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 PM Tue Sep 02 2025 51F 50F / 29% NW 13 G 20 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 PM Tue Sep 02 2025 50F 50F / 21% NW 12 G 21 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 PM Tue Sep 02 2025 50F 49F / 27% NNW 13 G 20 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 AM Wed Sep 03 2025 50F 49F / 30% N 13 G 23 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 AM Wed Sep 03 2025 49F 49F / 21% N 12 G 22 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 AM Wed Sep 03 2025 49F 48F / 28% N 11 G 17 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 AM Wed Sep 03 2025 48F 48F / 29% NNW 11 G 17 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 AM Wed Sep 03 2025 48F 48F / 31% NNW 13 G 18 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 AM Wed Sep 03 2025 47F 47F / 29% NW 16 G 21 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 AM Wed Sep 03 2025 47F 47F / 30% NNW 14 G 23 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 07 AM Wed Sep 03 2025 46F 46F / 30% NW 16 G 23 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 08 AM Wed Sep 03 2025 46F 46F / 32% NNW 16 G 22 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 09 AM Wed Sep 03 2025 48F 47F / 29% NNW 14 G 20 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 10 AM Wed Sep 03 2025 53F 49F / 25% NNW 10 G 16 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 11 AM Wed Sep 03 2025 58F 50F / 19% NW 9 G 17 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 12 PM Wed Sep 03 2025 61F 52F / 13% NNW 9 G 19 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 01 PM Wed Sep 03 2025 63F 53F / 9% NW 10 G 18 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 02 PM Wed Sep 03 2025 66F 55F / 7% NW 11 G 21 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 03 PM Wed Sep 03 2025 66F 54F / 12% NW 10 G 19 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 04 PM Wed Sep 03 2025 65F 55F / 10% NW 11 G 20 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 05 PM Wed Sep 03 2025 65F 55F / 10% NW 12 G 19 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 06 PM Wed Sep 03 2025 60F 54F / 15% WNW 13 G 21 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 07 PM Wed Sep 03 2025 59F 56F / 23% WNW 12 G 23 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 08 PM Wed Sep 03 2025 53F 52F / 27% NNW 15 G 23 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 09 PM Wed Sep 03 2025 51F 51F / 28% NW 16 G 24 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 10 PM Wed Sep 03 2025 51F 51F / 25% NNW 18 G 26 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 11 PM Wed Sep 03 2025 50F 50F / 25% NNW 17 G 27 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 12 AM Thu Sep 04 2025 49F 49F / 30% NNW 18 G 27 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 01 AM Thu Sep 04 2025 47F 49F / 30% NNW 15 G 25 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 02 AM Thu Sep 04 2025 48F 48F / 28% NNW 16 G 23 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 03 AM Thu Sep 04 2025 49F 49F / 26% NW 14 G 22 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 04 AM Thu Sep 04 2025 49F 49F / 24% WNW 15 G 21 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 05 AM Thu Sep 04 2025 49F 50F / 21% WNW 16 G 19 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 06 AM Thu Sep 04 2025 47F 48F / 20% W 16 G 19 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"