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 09-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 12 AM Tue Sep 09 2025 48F 46F / 51% S 14 G 26 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 01 AM Tue Sep 09 2025 48F 45F / 61% S 16 G 32 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 02 AM Tue Sep 09 2025 48F 44F / 61% S 17 G 32 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 03 AM Tue Sep 09 2025 47F 43F / 64% S 17 G 34 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 04 AM Tue Sep 09 2025 46F 43F / 57% S 16 G 33 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 05 AM Tue Sep 09 2025 46F 42F / 66% S 16 G 32 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 06 AM Tue Sep 09 2025 45F 42F / 70% S 17 G 32 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 07 AM Tue Sep 09 2025 44F 42F / 76% S 17 G 34 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 08 AM Tue Sep 09 2025 45F 42F / 62% S 17 G 34 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 09 AM Tue Sep 09 2025 46F 43F / 64% S 18 G 33 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 10 AM Tue Sep 09 2025 49F 43F / 58% S 16 G 34 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 11 AM Tue Sep 09 2025 53F 45F / 63% S 15 G 32 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 12 PM Tue Sep 09 2025 56F 46F / 54% S 14 G 32 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 01 PM Tue Sep 09 2025 57F 47F / 46% S 13 G 29 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 02 PM Tue Sep 09 2025 59F 48F / 41% S 12 G 28 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 03 PM Tue Sep 09 2025 59F 49F / 36% S 11 G 28 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 04 PM Tue Sep 09 2025 59F 50F / 29% S 11 G 27 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 05 PM Tue Sep 09 2025 59F 50F / 28% S 11 G 24 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 06 PM Tue Sep 09 2025 57F 50F / 31% SSW 10 G 21 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 07 PM Tue Sep 09 2025 55F 49F / 37% SSW 13 G 24 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 08 PM Tue Sep 09 2025 51F 47F / 35% SSW 14 G 26 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 09 PM Tue Sep 09 2025 50F 47F / 31% S 15 G 28 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 10 PM Tue Sep 09 2025 49F 46F / 35% SSW 14 G 29 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 11 PM Tue Sep 09 2025 48F 45F / 31% S 16 G 29 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 12 AM Wed Sep 10 2025 48F 44F / 22% S 17 G 33 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 01 AM Wed Sep 10 2025 47F 44F / 22% S 19 G 37 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 02 AM Wed Sep 10 2025 47F 44F / 25% S 19 G 39 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 03 AM Wed Sep 10 2025 46F 44F / 25% S 19 G 37 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 04 AM Wed Sep 10 2025 45F 42F / 27% S 20 G 39 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 05 AM Wed Sep 10 2025 45F 42F / 33% S 20 G 39 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 06 AM Wed Sep 10 2025 44F 42F / 31% S 21 G 39 MPH 10200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 07 AM Wed Sep 10 2025 44F 41F / 24% S 21 G 41 MPH 10500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 08 AM Wed Sep 10 2025 44F 42F / 28% S 19 G 35 MPH 10600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 09 AM Wed Sep 10 2025 47F 43F / 30% S 19 G 39 MPH 10300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 10 AM Wed Sep 10 2025 49F 43F / 33% SSE 17 G 37 MPH 10200 FT 3:1 / 33% 0.00" / 0.0" 0.00" / 0.0" 35 11 AM Wed Sep 10 2025 52F 44F / 28% SSE 15 G 36 MPH 10400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 12 PM Wed Sep 10 2025 54F 45F / 26% SSE 15 G 36 MPH 10600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 01 PM Wed Sep 10 2025 57F 49F / 24% SSE 15 G 37 MPH 10600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 02 PM Wed Sep 10 2025 58F 50F / 16% SSE 12 G 32 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 03 PM Wed Sep 10 2025 59F 51F / 19% SSE 12 G 32 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 04 PM Wed Sep 10 2025 59F 51F / 24% S 11 G 28 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 05 PM Wed Sep 10 2025 59F 51F / 24% SSW 12 G 26 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 06 PM Wed Sep 10 2025 57F 51F / 17% S 13 G 29 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 07 PM Wed Sep 10 2025 53F 50F / 28% S 15 G 32 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 08 PM Wed Sep 10 2025 50F 47F / 31% SSW 14 G 30 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 09 PM Wed Sep 10 2025 48F 46F / 29% S 15 G 34 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 10 PM Wed Sep 10 2025 47F 45F / 31% S 16 G 33 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 11 PM Wed Sep 10 2025 45F 44F / 36% S 14 G 33 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 12 AM Thu Sep 11 2025 44F 42F / 34% S 16 G 34 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"