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 27-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 27 2025 45F 41F / 100% WSW 15 G 27 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Wed Aug 27 2025 44F 40F / 100% W 14 G 24 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 AM Wed Aug 27 2025 45F 41F / 100% WSW 14 G 23 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 AM Wed Aug 27 2025 44F 40F / 100% WSW 10 G 17 MPH 13700 FT 0:1 / -% 0.06" / 0.0" 0.06" / 0.0" 4 10 AM Wed Aug 27 2025 46F 41F / 100% WSW 14 G 24 MPH 13400 FT 0:1 / -% 0.03" / 0.0" 0.09" / 0.0" 5 11 AM Wed Aug 27 2025 50F 42F / 100% WSW 13 G 22 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.09" / 0.0" 6 12 PM Wed Aug 27 2025 51F 44F / 99% WSW 11 G 22 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.09" / 0.0" 7 01 PM Wed Aug 27 2025 52F 45F / 95% SW 12 G 26 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.09" / 0.0" 8 02 PM Wed Aug 27 2025 54F 45F / 85% SW 11 G 26 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.09" / 0.0" 9 03 PM Wed Aug 27 2025 46F 41F / 84% WSW 8 G 17 MPH 13100 FT 0:1 / -% 0.07" / 0.0" 0.16" / 0.0" 10 04 PM Wed Aug 27 2025 51F 45F / 81% W 14 G 26 MPH 13100 FT 0:1 / -% 0.04" / 0.0" 0.20" / 0.0" 11 05 PM Wed Aug 27 2025 49F 44F / 90% W 16 G 25 MPH 13200 FT 0:1 / -% 0.13" / 0.0" 0.33" / 0.0" 12 06 PM Wed Aug 27 2025 50F 44F / 93% W 13 G 22 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.33" / 0.0" 13 07 PM Wed Aug 27 2025 48F 43F / 94% W 14 G 22 MPH 13400 FT 0:1 / -% 0.01" / 0.0" 0.34" / 0.0" 14 08 PM Wed Aug 27 2025 44F 41F / 100% W 10 G 17 MPH 13300 FT 0:1 / -% 0.09" / 0.0" 0.43" / 0.0" 15 09 PM Wed Aug 27 2025 43F 41F / 76% W 15 G 23 MPH 13100 FT 0:1 / -% 0.09" / 0.0" 0.52" / 0.0" 16 10 PM Wed Aug 27 2025 44F 41F / 76% W 16 G 27 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 17 11 PM Wed Aug 27 2025 42F 40F / 91% W 13 G 21 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 18 12 AM Thu Aug 28 2025 42F 39F / 100% W 13 G 23 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 19 01 AM Thu Aug 28 2025 42F 39F / 99% W 12 G 24 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 20 02 AM Thu Aug 28 2025 42F 39F / 84% W 13 G 20 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 21 03 AM Thu Aug 28 2025 42F 39F / 87% W 15 G 21 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 22 04 AM Thu Aug 28 2025 42F 38F / 91% W 16 G 25 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 23 05 AM Thu Aug 28 2025 42F 39F / 92% WNW 17 G 27 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 24 06 AM Thu Aug 28 2025 41F 38F / 95% WNW 18 G 26 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 25 07 AM Thu Aug 28 2025 40F 37F / 97% WNW 17 G 26 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 26 08 AM Thu Aug 28 2025 41F 38F / 92% WNW 19 G 28 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 27 09 AM Thu Aug 28 2025 43F 39F / 100% WNW 20 G 28 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 28 10 AM Thu Aug 28 2025 45F 39F / 100% WNW 16 G 25 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 29 11 AM Thu Aug 28 2025 46F 40F / 96% WNW 14 G 25 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 30 12 PM Thu Aug 28 2025 48F 41F / 93% WNW 13 G 23 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 31 01 PM Thu Aug 28 2025 50F 42F / 91% WNW 13 G 21 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 32 02 PM Thu Aug 28 2025 52F 43F / 81% WNW 12 G 21 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 33 03 PM Thu Aug 28 2025 52F 43F / 87% W 11 G 19 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 34 04 PM Thu Aug 28 2025 52F 44F / 87% WNW 11 G 20 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 35 05 PM Thu Aug 28 2025 53F 45F / 84% WNW 11 G 19 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 36 06 PM Thu Aug 28 2025 50F 44F / 87% WNW 13 G 22 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 37 07 PM Thu Aug 28 2025 49F 45F / 74% W 13 G 22 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 38 08 PM Thu Aug 28 2025 45F 44F / 79% W 12 G 19 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 39 09 PM Thu Aug 28 2025 43F 43F / 60% W 12 G 18 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 40 10 PM Thu Aug 28 2025 43F 43F / 64% WNW 15 G 21 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 41 11 PM Thu Aug 28 2025 43F 42F / 57% WNW 13 G 19 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 42 12 AM Fri Aug 29 2025 43F 42F / 57% WNW 17 G 24 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 43 01 AM Fri Aug 29 2025 41F 41F / 67% NW 15 G 23 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 44 02 AM Fri Aug 29 2025 42F 40F / 77% NW 14 G 22 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 45 03 AM Fri Aug 29 2025 41F 40F / 75% WNW 14 G 22 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 46 04 AM Fri Aug 29 2025 41F 40F / 72% ESE 13 G 20 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 47 05 AM Fri Aug 29 2025 40F 40F / 70% NNE 14 G 18 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0" 48 06 AM Fri Aug 29 2025 39F 39F / 72% WNW 15 G 18 MPH 10700 FT 0:1 / -% 0.00" / 0.0" 0.52" / 0.0"