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 06Z 18-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 AM Mon Aug 18 2025 51F 49F / 18% SW 14 G 22 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 01 AM Mon Aug 18 2025 50F 49F / 13% SSW 14 G 22 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 02 AM Mon Aug 18 2025 50F 48F / 19% SSW 13 G 22 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 03 AM Mon Aug 18 2025 49F 48F / 19% S 13 G 24 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 04 AM Mon Aug 18 2025 49F 47F / 18% S 14 G 25 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 05 AM Mon Aug 18 2025 48F 47F / 19% SSW 14 G 25 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 06 AM Mon Aug 18 2025 48F 47F / 20% SSW 14 G 23 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 07 AM Mon Aug 18 2025 47F 47F / 22% SSW 13 G 24 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 08 AM Mon Aug 18 2025 48F 47F / 24% SSW 13 G 23 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 09 AM Mon Aug 18 2025 50F 48F / 26% S 12 G 21 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 10 AM Mon Aug 18 2025 53F 48F / 24% S 10 G 23 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 11 AM Mon Aug 18 2025 58F 50F / 23% S 10 G 23 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 12 PM Mon Aug 18 2025 61F 52F / 18% S 10 G 23 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 01 PM Mon Aug 18 2025 62F 53F / 15% S 10 G 23 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 02 PM Mon Aug 18 2025 64F 53F / 15% S 9 G 21 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 03 PM Mon Aug 18 2025 64F 54F / 14% S 9 G 20 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 04 PM Mon Aug 18 2025 64F 55F / 12% SSW 9 G 20 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 05 PM Mon Aug 18 2025 64F 56F / 10% SSW 10 G 21 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 06 PM Mon Aug 18 2025 62F 56F / 10% SSW 10 G 18 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 07 PM Mon Aug 18 2025 59F 55F / 14% SW 11 G 18 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 08 PM Mon Aug 18 2025 54F 52F / 14% SW 12 G 20 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 09 PM Mon Aug 18 2025 52F 52F / 12% SW 14 G 21 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 10 PM Mon Aug 18 2025 52F 51F / 12% WSW 14 G 20 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 11 PM Mon Aug 18 2025 52F 51F / 15% WSW 13 G 20 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 12 AM Tue Aug 19 2025 52F 51F / 12% WSW 15 G 21 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 01 AM Tue Aug 19 2025 52F 51F / 9% WSW 16 G 23 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 02 AM Tue Aug 19 2025 52F 51F / 8% WSW 15 G 19 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 03 AM Tue Aug 19 2025 52F 52F / 11% WSW 14 G 19 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 04 AM Tue Aug 19 2025 51F 51F / 13% W 13 G 18 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 05 AM Tue Aug 19 2025 51F 51F / 18% WSW 12 G 16 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 06 AM Tue Aug 19 2025 51F 51F / 17% WSW 12 G 16 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 07 AM Tue Aug 19 2025 51F 50F / 14% SW 14 G 20 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 08 AM Tue Aug 19 2025 51F 51F / 12% WSW 15 G 20 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 09 AM Tue Aug 19 2025 53F 52F / 17% SW 13 G 20 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 10 AM Tue Aug 19 2025 56F 53F / 11% SW 10 G 19 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 11 AM Tue Aug 19 2025 62F 54F / 9% SSW 9 G 18 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 12 PM Tue Aug 19 2025 65F 56F / 7% SW 10 G 19 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 01 PM Tue Aug 19 2025 69F 61F / 0% SW 10 G 19 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 02 PM Tue Aug 19 2025 69F 61F / 2% SSW 9 G 20 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 03 PM Tue Aug 19 2025 70F 62F / 9% SW 10 G 21 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 04 PM Tue Aug 19 2025 70F 61F / 10% SW 10 G 23 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 05 PM Tue Aug 19 2025 71F 62F / 5% SW 10 G 20 MPH 13800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 06 PM Tue Aug 19 2025 68F 62F / 1% WSW 12 G 19 MPH 13900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 07 PM Tue Aug 19 2025 64F 61F / 9% WSW 14 G 20 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 08 PM Tue Aug 19 2025 60F 58F / 20% WSW 15 G 21 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 09 PM Tue Aug 19 2025 57F 57F / 24% WSW 13 G 23 MPH 14500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 10 PM Tue Aug 19 2025 56F 56F / 27% WSW 13 G 22 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 11 PM Tue Aug 19 2025 55F 56F / 27% SW 12 G 21 MPH 14200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 12 AM Wed Aug 20 2025 56F 56F / 19% SSW 12 G 20 MPH 14300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"