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 06-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 PM Sat Sep 06 2025 53F 45F / 72% W 5 G 10 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 01 PM Sat Sep 06 2025 54F 46F / 71% SW 8 G 17 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 02 PM Sat Sep 06 2025 56F 47F / 68% S 10 G 22 MPH 13600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 03 PM Sat Sep 06 2025 56F 47F / 75% SSW 11 G 25 MPH 14000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 04 PM Sat Sep 06 2025 57F 48F / 77% SSW 11 G 22 MPH 13800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 05 PM Sat Sep 06 2025 56F 48F / 74% SW 12 G 23 MPH 13800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 06 PM Sat Sep 06 2025 54F 48F / 64% SW 13 G 26 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 07 PM Sat Sep 06 2025 52F 46F / 79% WSW 11 G 19 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 08 PM Sat Sep 06 2025 48F 44F / 85% WSW 16 G 26 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 09 PM Sat Sep 06 2025 46F 43F / 64% WSW 21 G 30 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 10 PM Sat Sep 06 2025 46F 43F / 58% W 22 G 33 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 11 PM Sat Sep 06 2025 46F 43F / 56% W 22 G 31 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 12 AM Sun Sep 07 2025 45F 43F / 53% W 19 G 28 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 01 AM Sun Sep 07 2025 45F 44F / 53% W 17 G 27 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 02 AM Sun Sep 07 2025 46F 44F / 53% W 16 G 23 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 03 AM Sun Sep 07 2025 45F 43F / 54% WSW 14 G 19 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 04 AM Sun Sep 07 2025 44F 42F / 65% WSW 14 G 20 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 05 AM Sun Sep 07 2025 44F 43F / 66% WSW 15 G 22 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 06 AM Sun Sep 07 2025 44F 43F / 54% WSW 17 G 24 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 07 AM Sun Sep 07 2025 43F 43F / 59% WSW 17 G 25 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 08 AM Sun Sep 07 2025 44F 43F / 53% WSW 18 G 27 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 09 AM Sun Sep 07 2025 46F 44F / 61% W 16 G 26 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 10 AM Sun Sep 07 2025 49F 44F / 40% W 15 G 23 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 11 AM Sun Sep 07 2025 53F 45F / 40% W 12 G 22 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 12 PM Sun Sep 07 2025 56F 47F / 36% W 10 G 18 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 01 PM Sun Sep 07 2025 58F 49F / 36% WSW 11 G 20 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 02 PM Sun Sep 07 2025 59F 49F / 33% WSW 11 G 22 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 03 PM Sun Sep 07 2025 59F 50F / 43% WSW 11 G 22 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 04 PM Sun Sep 07 2025 58F 49F / 45% SW 11 G 23 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 05 PM Sun Sep 07 2025 57F 49F / 46% SW 15 G 29 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 06 PM Sun Sep 07 2025 56F 49F / 37% SW 13 G 24 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 07 PM Sun Sep 07 2025 53F 48F / 38% WSW 15 G 24 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 08 PM Sun Sep 07 2025 48F 45F / 55% WSW 18 G 28 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 09 PM Sun Sep 07 2025 47F 45F / 44% WSW 17 G 27 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 10 PM Sun Sep 07 2025 47F 46F / 50% SW 16 G 24 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 11 PM Sun Sep 07 2025 46F 44F / 48% SW 16 G 26 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 12 AM Mon Sep 08 2025 46F 44F / 53% SW 17 G 28 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 01 AM Mon Sep 08 2025 47F 45F / 50% SSW 19 G 32 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 02 AM Mon Sep 08 2025 47F 46F / 57% SSW 21 G 34 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 03 AM Mon Sep 08 2025 46F 45F / 49% SW 22 G 35 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 04 AM Mon Sep 08 2025 45F 45F / 46% WSW 22 G 33 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 05 AM Mon Sep 08 2025 44F 44F / 37% WSW 19 G 32 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 06 AM Mon Sep 08 2025 44F 44F / 35% WSW 19 G 29 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 07 AM Mon Sep 08 2025 43F 43F / 56% WSW 18 G 27 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 08 AM Mon Sep 08 2025 44F 44F / 41% WSW 18 G 28 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 09 AM Mon Sep 08 2025 47F 46F / 53% WSW 16 G 28 MPH 11600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 10 AM Mon Sep 08 2025 50F 46F / 46% SW 16 G 30 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 11 AM Mon Sep 08 2025 54F 47F / 50% SW 14 G 25 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 12 PM Mon Sep 08 2025 57F 48F / 51% SW 12 G 24 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"