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 18Z 01-Oct-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 PM Wed Oct 01 2025 48F 40F / 63% S 11 G 24 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 01 PM Wed Oct 01 2025 49F 40F / 62% SSW 11 G 22 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 02 PM Wed Oct 01 2025 51F 41F / 52% S 10 G 22 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 03 PM Wed Oct 01 2025 52F 43F / 47% S 10 G 22 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 04 PM Wed Oct 01 2025 51F 43F / 44% S 10 G 22 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 05 PM Wed Oct 01 2025 51F 44F / 48% SSW 11 G 22 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 06 PM Wed Oct 01 2025 48F 44F / 44% S 12 G 23 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 07 PM Wed Oct 01 2025 45F 41F / 45% S 14 G 27 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 08 PM Wed Oct 01 2025 42F 40F / 44% S 16 G 31 MPH 10600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 09 PM Wed Oct 01 2025 43F 41F / 44% S 19 G 36 MPH 10700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 10 PM Wed Oct 01 2025 43F 41F / 51% S 18 G 32 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 11 PM Wed Oct 01 2025 43F 40F / 56% S 18 G 31 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 12 AM Thu Oct 02 2025 43F 40F / 55% S 19 G 33 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 01 AM Thu Oct 02 2025 42F 40F / 56% S 20 G 38 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 02 AM Thu Oct 02 2025 43F 40F / 60% S 20 G 36 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 03 AM Thu Oct 02 2025 42F 40F / 60% S 21 G 37 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 04 AM Thu Oct 02 2025 42F 40F / 55% S 21 G 38 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 05 AM Thu Oct 02 2025 42F 40F / 56% S 24 G 42 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 06 AM Thu Oct 02 2025 42F 40F / 58% S 25 G 44 MPH 10700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 07 AM Thu Oct 02 2025 42F 40F / 57% S 23 G 41 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 08 AM Thu Oct 02 2025 42F 40F / 58% SSW 22 G 40 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 09 AM Thu Oct 02 2025 43F 41F / 60% SSW 21 G 39 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 10 AM Thu Oct 02 2025 45F 42F / 55% S 20 G 38 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 11 AM Thu Oct 02 2025 48F 42F / 49% S 18 G 38 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 12 PM Thu Oct 02 2025 51F 44F / 47% S 16 G 36 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 01 PM Thu Oct 02 2025 53F 45F / 42% S 15 G 33 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 02 PM Thu Oct 02 2025 55F 46F / 38% S 14 G 33 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 03 PM Thu Oct 02 2025 55F 46F / 39% S 14 G 33 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 04 PM Thu Oct 02 2025 55F 46F / 33% S 13 G 30 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 05 PM Thu Oct 02 2025 54F 47F / 34% S 11 G 28 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 06 PM Thu Oct 02 2025 52F 46F / 35% S 12 G 27 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 07 PM Thu Oct 02 2025 48F 45F / 35% S 14 G 29 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 08 PM Thu Oct 02 2025 46F 43F / 39% S 15 G 31 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 09 PM Thu Oct 02 2025 45F 43F / 33% S 17 G 33 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 10 PM Thu Oct 02 2025 45F 42F / 41% SSW 17 G 32 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 11 PM Thu Oct 02 2025 44F 41F / 37% S 19 G 35 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 12 AM Fri Oct 03 2025 43F 40F / 36% S 21 G 39 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 01 AM Fri Oct 03 2025 44F 42F / 37% S 23 G 46 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 02 AM Fri Oct 03 2025 44F 41F / 44% S 24 G 45 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 03 AM Fri Oct 03 2025 43F 40F / 48% S 25 G 50 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 04 AM Fri Oct 03 2025 43F 41F / 54% S 24 G 46 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 05 AM Fri Oct 03 2025 43F 40F / 60% S 22 G 47 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 06 AM Fri Oct 03 2025 43F 40F / 64% S 23 G 49 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 07 AM Fri Oct 03 2025 43F 40F / 69% S 23 G 45 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 08 AM Fri Oct 03 2025 43F 39F / 65% S 21 G 45 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 09 AM Fri Oct 03 2025 44F 40F / 73% S 20 G 44 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 10 AM Fri Oct 03 2025 45F 40F / 74% S 21 G 45 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 11 AM Fri Oct 03 2025 48F 41F / 72% S 20 G 44 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 12 PM Fri Oct 03 2025 49F 41F / 65% S 19 G 42 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"