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 00Z 10-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 PM Tue Sep 09 2025 57F 50F / 27% S 12 G 26 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 PM Tue Sep 09 2025 54F 49F / 21% SSW 13 G 27 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 PM Tue Sep 09 2025 50F 47F / 32% SSW 14 G 25 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 PM Tue Sep 09 2025 50F 47F / 31% SSW 15 G 29 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 PM Tue Sep 09 2025 48F 46F / 29% SSW 13 G 24 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 PM Tue Sep 09 2025 48F 46F / 26% SSW 13 G 26 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 AM Wed Sep 10 2025 48F 45F / 34% S 15 G 30 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 AM Wed Sep 10 2025 47F 44F / 27% S 17 G 34 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 AM Wed Sep 10 2025 47F 44F / 20% S 18 G 36 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 AM Wed Sep 10 2025 46F 43F / 14% S 20 G 40 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 AM Wed Sep 10 2025 45F 43F / 11% S 20 G 43 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 AM Wed Sep 10 2025 45F 43F / 14% S 22 G 42 MPH 10700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 AM Wed Sep 10 2025 44F 42F / 23% S 21 G 40 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 AM Wed Sep 10 2025 45F 41F / 39% S 20 G 42 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 AM Wed Sep 10 2025 45F 41F / 48% SSE 17 G 35 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 AM Wed Sep 10 2025 46F 42F / 49% S 18 G 39 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 AM Wed Sep 10 2025 49F 43F / 55% SSE 15 G 35 MPH 10400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 AM Wed Sep 10 2025 51F 44F / 38% SSE 15 G 36 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 PM Wed Sep 10 2025 54F 45F / 44% S 15 G 35 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 PM Wed Sep 10 2025 56F 46F / 46% SSE 12 G 32 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 PM Wed Sep 10 2025 58F 47F / 37% SSE 12 G 31 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 PM Wed Sep 10 2025 58F 48F / 33% SSE 12 G 32 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 PM Wed Sep 10 2025 57F 48F / 35% S 14 G 31 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 PM Wed Sep 10 2025 57F 48F / 34% S 14 G 33 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 PM Wed Sep 10 2025 53F 46F / 42% SSE 16 G 35 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 07 PM Wed Sep 10 2025 51F 46F / 40% S 14 G 32 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 08 PM Wed Sep 10 2025 48F 44F / 41% S 16 G 29 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 09 PM Wed Sep 10 2025 47F 44F / 40% SSW 14 G 28 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 10 PM Wed Sep 10 2025 46F 43F / 33% SSW 15 G 28 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 11 PM Wed Sep 10 2025 45F 42F / 36% S 15 G 30 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 12 AM Thu Sep 11 2025 45F 42F / 36% S 17 G 33 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 01 AM Thu Sep 11 2025 44F 41F / 32% S 17 G 36 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 02 AM Thu Sep 11 2025 44F 40F / 33% S 18 G 34 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 03 AM Thu Sep 11 2025 43F 40F / 38% S 18 G 35 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 04 AM Thu Sep 11 2025 42F 39F / 39% S 18 G 38 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 05 AM Thu Sep 11 2025 42F 39F / 47% S 20 G 39 MPH 10500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 06 AM Thu Sep 11 2025 41F 39F / 42% S 19 G 38 MPH 10600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 07 AM Thu Sep 11 2025 42F 40F / 40% S 19 G 38 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 08 AM Thu Sep 11 2025 42F 40F / 49% SSE 18 G 36 MPH 10500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 09 AM Thu Sep 11 2025 44F 41F / 50% SSE 19 G 37 MPH 10400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 10 AM Thu Sep 11 2025 47F 42F / 46% SSE 18 G 36 MPH 10100 FT 4:1 / 25% 0.00" / 0.0" 0.00" / 0.0" 41 11 AM Thu Sep 11 2025 50F 42F / 43% SSE 17 G 40 MPH 10100 FT 4:1 / 25% 0.00" / 0.0" 0.00" / 0.0" 42 12 PM Thu Sep 11 2025 52F 43F / 46% SSE 17 G 38 MPH 10500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 01 PM Thu Sep 11 2025 53F 45F / 42% S 15 G 36 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 02 PM Thu Sep 11 2025 54F 46F / 36% S 14 G 34 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 03 PM Thu Sep 11 2025 54F 47F / 37% S 13 G 31 MPH 10600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 04 PM Thu Sep 11 2025 54F 46F / 37% SSW 12 G 28 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 05 PM Thu Sep 11 2025 53F 46F / 35% S 12 G 30 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 06 PM Thu Sep 11 2025 52F 47F / 34% S 14 G 28 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"