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 04-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 Thu Sep 04 2025 48F 47F / 29% WNW 11 G 14 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Thu Sep 04 2025 47F 46F / 23% WNW 11 G 14 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 AM Thu Sep 04 2025 46F 46F / 38% WNW 13 G 16 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 AM Thu Sep 04 2025 48F 47F / 37% WNW 10 G 14 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 AM Thu Sep 04 2025 52F 47F / 30% WNW 9 G 14 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 AM Thu Sep 04 2025 57F 49F / 30% WNW 6 G 12 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 PM Thu Sep 04 2025 60F 51F / 29% WNW 7 G 14 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 PM Thu Sep 04 2025 61F 52F / 30% WNW 7 G 15 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 PM Thu Sep 04 2025 62F 53F / 29% W 9 G 18 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 PM Thu Sep 04 2025 63F 53F / 26% WNW 11 G 20 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 PM Thu Sep 04 2025 60F 52F / 28% WNW 9 G 14 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 PM Thu Sep 04 2025 60F 52F / 26% WNW 11 G 16 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 PM Thu Sep 04 2025 58F 52F / 25% W 10 G 17 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 PM Thu Sep 04 2025 55F 49F / 37% W 12 G 18 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 PM Thu Sep 04 2025 50F 47F / 38% WNW 14 G 21 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 PM Thu Sep 04 2025 46F 45F / 51% WNW 15 G 19 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 PM Thu Sep 04 2025 47F 46F / 42% WNW 16 G 25 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 PM Thu Sep 04 2025 46F 45F / 53% WNW 18 G 27 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 AM Fri Sep 05 2025 46F 44F / 58% NW 15 G 23 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 AM Fri Sep 05 2025 46F 44F / 57% NW 15 G 24 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 AM Fri Sep 05 2025 46F 44F / 55% WNW 16 G 24 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 AM Fri Sep 05 2025 46F 43F / 57% WNW 14 G 20 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 AM Fri Sep 05 2025 46F 43F / 64% WNW 13 G 19 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 AM Fri Sep 05 2025 46F 43F / 60% WNW 15 G 23 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 AM Fri Sep 05 2025 45F 42F / 62% WNW 14 G 22 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 07 AM Fri Sep 05 2025 44F 42F / 62% WNW 14 G 20 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 08 AM Fri Sep 05 2025 43F 42F / 60% WNW 13 G 17 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 09 AM Fri Sep 05 2025 46F 43F / 67% WNW 11 G 15 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 10 AM Fri Sep 05 2025 50F 44F / 64% WNW 9 G 14 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 11 AM Fri Sep 05 2025 54F 46F / 56% WNW 9 G 15 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 12 PM Fri Sep 05 2025 57F 48F / 54% WNW 9 G 17 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 01 PM Fri Sep 05 2025 58F 49F / 55% WNW 12 G 21 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 02 PM Fri Sep 05 2025 60F 49F / 48% WNW 14 G 23 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 03 PM Fri Sep 05 2025 60F 50F / 53% WNW 13 G 24 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 04 PM Fri Sep 05 2025 60F 49F / 50% WNW 12 G 21 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 05 PM Fri Sep 05 2025 60F 50F / 48% WNW 15 G 23 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 06 PM Fri Sep 05 2025 55F 48F / 55% W 11 G 18 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 07 PM Fri Sep 05 2025 55F 50F / 59% WNW 12 G 17 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 08 PM Fri Sep 05 2025 50F 48F / 61% WNW 12 G 18 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 09 PM Fri Sep 05 2025 48F 47F / 53% W 12 G 16 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 10 PM Fri Sep 05 2025 47F 47F / 53% W 12 G 17 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 11 PM Fri Sep 05 2025 47F 46F / 44% WSW 9 G 12 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 12 AM Sat Sep 06 2025 47F 46F / 43% WSW 11 G 13 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 01 AM Sat Sep 06 2025 46F 46F / 45% W 11 G 15 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 02 AM Sat Sep 06 2025 47F 46F / 43% W 10 G 14 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 03 AM Sat Sep 06 2025 45F 44F / 50% WSW 12 G 15 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 04 AM Sat Sep 06 2025 44F 43F / 58% WSW 12 G 16 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 05 AM Sat Sep 06 2025 44F 43F / 59% W 12 G 16 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 06 AM Sat Sep 06 2025 43F 43F / 58% WSW 13 G 16 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"