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 05-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 Fri Sep 05 2025 45F 43F / 73% NW 14 G 21 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Fri Sep 05 2025 45F 43F / 69% NW 11 G 19 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 AM Fri Sep 05 2025 45F 43F / 66% WNW 13 G 17 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 AM Fri Sep 05 2025 47F 44F / 59% WNW 9 G 13 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 AM Fri Sep 05 2025 50F 44F / 55% WNW 8 G 12 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 AM Fri Sep 05 2025 55F 46F / 57% WNW 8 G 12 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 PM Fri Sep 05 2025 57F 48F / 49% WNW 8 G 14 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 PM Fri Sep 05 2025 58F 49F / 52% WNW 9 G 15 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 PM Fri Sep 05 2025 60F 50F / 46% WNW 10 G 19 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 PM Fri Sep 05 2025 61F 50F / 44% WNW 13 G 22 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 PM Fri Sep 05 2025 59F 50F / 45% WNW 14 G 22 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 PM Fri Sep 05 2025 59F 50F / 43% WNW 13 G 20 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 PM Fri Sep 05 2025 57F 50F / 42% WNW 11 G 19 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 PM Fri Sep 05 2025 54F 49F / 54% WNW 14 G 20 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 PM Fri Sep 05 2025 50F 46F / 62% WNW 13 G 21 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 PM Fri Sep 05 2025 47F 46F / 60% W 12 G 17 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 PM Fri Sep 05 2025 47F 45F / 60% W 11 G 18 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 PM Fri Sep 05 2025 47F 45F / 64% WNW 11 G 15 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 AM Sat Sep 06 2025 47F 45F / 60% WNW 10 G 15 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 AM Sat Sep 06 2025 46F 44F / 50% W 9 G 15 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 AM Sat Sep 06 2025 45F 44F / 55% WSW 10 G 15 MPH 13700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 AM Sat Sep 06 2025 44F 43F / 66% WSW 8 G 10 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 AM Sat Sep 06 2025 45F 42F / 76% W 12 G 18 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 AM Sat Sep 06 2025 44F 41F / 82% W 12 G 19 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 AM Sat Sep 06 2025 43F 41F / 83% SW 11 G 16 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 07 AM Sat Sep 06 2025 43F 41F / 78% SSW 10 G 16 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 08 AM Sat Sep 06 2025 44F 41F / 73% SSW 10 G 15 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 09 AM Sat Sep 06 2025 46F 43F / 77% SW 10 G 16 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 10 AM Sat Sep 06 2025 48F 43F / 77% SW 9 G 17 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 11 AM Sat Sep 06 2025 50F 44F / 76% WSW 6 G 12 MPH 13700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 12 PM Sat Sep 06 2025 51F 44F / 75% SW 8 G 16 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 01 PM Sat Sep 06 2025 53F 46F / 77% WSW 9 G 18 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 02 PM Sat Sep 06 2025 55F 46F / 71% WSW 11 G 22 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 03 PM Sat Sep 06 2025 56F 47F / 65% WSW 12 G 24 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 04 PM Sat Sep 06 2025 48F 43F / 69% WSW 15 G 27 MPH 13200 FT 0:1 / -% 0.01" / 0.0" 0.01" / 0.0" 35 05 PM Sat Sep 06 2025 55F 46F / 70% WSW 17 G 29 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 36 06 PM Sat Sep 06 2025 52F 45F / 76% W 17 G 28 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 37 07 PM Sat Sep 06 2025 51F 47F / 73% W 19 G 29 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 38 08 PM Sat Sep 06 2025 47F 45F / 68% W 20 G 30 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 39 09 PM Sat Sep 06 2025 45F 44F / 63% W 20 G 29 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 40 10 PM Sat Sep 06 2025 45F 44F / 56% W 19 G 28 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 41 11 PM Sat Sep 06 2025 44F 43F / 66% WSW 15 G 24 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 42 12 AM Sun Sep 07 2025 45F 44F / 55% WSW 19 G 27 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 43 01 AM Sun Sep 07 2025 44F 44F / 54% W 18 G 28 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 44 02 AM Sun Sep 07 2025 44F 43F / 60% WSW 15 G 22 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 45 03 AM Sun Sep 07 2025 44F 43F / 64% WSW 15 G 21 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 46 04 AM Sun Sep 07 2025 44F 43F / 56% SW 16 G 23 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 47 05 AM Sun Sep 07 2025 44F 43F / 54% WSW 16 G 23 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0" 48 06 AM Sun Sep 07 2025 42F 42F / 50% WSW 18 G 24 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.01" / 0.0"