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 08-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 Mon Sep 08 2025 44F 44F / 41% SW 18 G 28 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Mon Sep 08 2025 44F 44F / 27% WSW 17 G 25 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 AM Mon Sep 08 2025 45F 44F / 32% SW 19 G 28 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 AM Mon Sep 08 2025 46F 45F / 25% SW 18 G 28 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 AM Mon Sep 08 2025 50F 46F / 26% SW 17 G 27 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 AM Mon Sep 08 2025 54F 47F / 25% SW 15 G 28 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 PM Mon Sep 08 2025 57F 48F / 36% SW 14 G 27 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 PM Mon Sep 08 2025 58F 49F / 38% SW 14 G 27 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 PM Mon Sep 08 2025 60F 49F / 36% SW 12 G 26 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 PM Mon Sep 08 2025 60F 50F / 38% SW 12 G 23 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 PM Mon Sep 08 2025 59F 51F / 34% SW 12 G 24 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 PM Mon Sep 08 2025 59F 51F / 34% SW 12 G 21 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 PM Mon Sep 08 2025 57F 51F / 34% SW 11 G 21 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 PM Mon Sep 08 2025 54F 49F / 34% SW 12 G 20 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 PM Mon Sep 08 2025 50F 47F / 40% SW 12 G 21 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 PM Mon Sep 08 2025 48F 46F / 58% S 15 G 25 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 PM Mon Sep 08 2025 48F 46F / 47% SSW 14 G 26 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 PM Mon Sep 08 2025 48F 46F / 48% SSE 14 G 24 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 AM Tue Sep 09 2025 47F 44F / 65% SW 11 G 18 MPH 13500 FT 0:1 / -% 0.02" / 0.0" 0.02" / 0.0" 19 01 AM Tue Sep 09 2025 46F 44F / 59% S 13 G 25 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 20 02 AM Tue Sep 09 2025 46F 43F / 61% S 17 G 29 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 21 03 AM Tue Sep 09 2025 46F 43F / 70% S 13 G 26 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 22 04 AM Tue Sep 09 2025 46F 43F / 72% SSW 16 G 31 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 23 05 AM Tue Sep 09 2025 45F 43F / 56% SSW 18 G 34 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 24 06 AM Tue Sep 09 2025 45F 43F / 61% S 18 G 34 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 25 07 AM Tue Sep 09 2025 44F 41F / 56% SSW 18 G 33 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 26 08 AM Tue Sep 09 2025 45F 42F / 56% SSW 18 G 33 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 27 09 AM Tue Sep 09 2025 47F 43F / 52% SSW 18 G 32 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 28 10 AM Tue Sep 09 2025 49F 44F / 44% S 15 G 31 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 29 11 AM Tue Sep 09 2025 53F 45F / 43% S 13 G 33 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 30 12 PM Tue Sep 09 2025 55F 45F / 56% S 13 G 34 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 31 01 PM Tue Sep 09 2025 57F 47F / 51% S 14 G 33 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 32 02 PM Tue Sep 09 2025 59F 48F / 43% S 12 G 31 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 33 03 PM Tue Sep 09 2025 59F 48F / 46% SSW 12 G 29 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 34 04 PM Tue Sep 09 2025 59F 49F / 49% SSW 12 G 27 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 35 05 PM Tue Sep 09 2025 59F 50F / 44% SSW 14 G 29 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 36 06 PM Tue Sep 09 2025 56F 49F / 38% S 13 G 28 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 37 07 PM Tue Sep 09 2025 55F 51F / 28% SSW 15 G 29 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 38 08 PM Tue Sep 09 2025 50F 48F / 40% SSW 15 G 29 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 39 09 PM Tue Sep 09 2025 49F 47F / 32% SSW 13 G 27 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 40 10 PM Tue Sep 09 2025 49F 48F / 28% S 14 G 29 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 41 11 PM Tue Sep 09 2025 50F 47F / 24% S 14 G 30 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 42 12 AM Wed Sep 10 2025 48F 46F / 29% SSE 17 G 35 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 43 01 AM Wed Sep 10 2025 46F 44F / 42% SSE 18 G 36 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 44 02 AM Wed Sep 10 2025 46F 43F / 62% SSE 16 G 32 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 45 03 AM Wed Sep 10 2025 45F 43F / 60% SSE 18 G 36 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 46 04 AM Wed Sep 10 2025 45F 43F / 59% SSE 20 G 36 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 47 05 AM Wed Sep 10 2025 44F 42F / 66% SSE 18 G 36 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0" 48 06 AM Wed Sep 10 2025 43F 41F / 68% SSE 17 G 33 MPH 10700 FT 0:1 / -% 0.00" / 0.0" 0.02" / 0.0"