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 30-Aug-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 Sat Aug 30 2025 40F 39F / 65% NNW 11 G 21 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Sat Aug 30 2025 41F 39F / 60% NNW 14 G 22 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 AM Sat Aug 30 2025 41F 39F / 58% NE 16 G 22 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 AM Sat Aug 30 2025 43F 41F / 56% NW 15 G 23 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 AM Sat Aug 30 2025 46F 42F / 53% NW 13 G 20 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 AM Sat Aug 30 2025 51F 43F / 52% NW 11 G 17 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 PM Sat Aug 30 2025 54F 45F / 42% NW 8 G 16 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 PM Sat Aug 30 2025 56F 47F / 45% NW 8 G 15 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 PM Sat Aug 30 2025 58F 48F / 39% NW 8 G 15 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 PM Sat Aug 30 2025 59F 49F / 42% NW 7 G 13 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 PM Sat Aug 30 2025 58F 50F / 50% WNW 9 G 15 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 PM Sat Aug 30 2025 58F 49F / 52% WNW 11 G 18 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 PM Sat Aug 30 2025 55F 49F / 52% WNW 7 G 18 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 PM Sat Aug 30 2025 52F 47F / 66% NW 12 G 18 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 PM Sat Aug 30 2025 48F 45F / 66% NW 12 G 19 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 PM Sat Aug 30 2025 46F 44F / 54% NW 12 G 17 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 PM Sat Aug 30 2025 46F 44F / 40% NNW 14 G 23 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 PM Sat Aug 30 2025 45F 43F / 41% N 14 G 24 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 AM Sun Aug 31 2025 44F 43F / 41% NE 13 G 23 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 AM Sun Aug 31 2025 43F 43F / 42% ENE 12 G 23 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 AM Sun Aug 31 2025 42F 42F / 44% ESE 11 G 17 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 AM Sun Aug 31 2025 42F 43F / 44% ESE 10 G 17 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 AM Sun Aug 31 2025 43F 43F / 38% SE 11 G 15 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 AM Sun Aug 31 2025 44F 43F / 35% SSW 11 G 14 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 AM Sun Aug 31 2025 44F 43F / 37% SSW 11 G 14 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 07 AM Sun Aug 31 2025 43F 42F / 39% S 12 G 17 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 08 AM Sun Aug 31 2025 43F 43F / 44% SSE 11 G 18 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 09 AM Sun Aug 31 2025 46F 44F / 44% SSE 12 G 20 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 10 AM Sun Aug 31 2025 50F 45F / 45% SSE 9 G 16 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 11 AM Sun Aug 31 2025 54F 47F / 42% SSW 8 G 17 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 12 PM Sun Aug 31 2025 58F 49F / 28% SW 7 G 15 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 01 PM Sun Aug 31 2025 61F 51F / 22% W 7 G 15 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 02 PM Sun Aug 31 2025 63F 53F / 17% W 6 G 15 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 03 PM Sun Aug 31 2025 63F 53F / 16% W 6 G 14 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 04 PM Sun Aug 31 2025 63F 54F / 10% W 8 G 15 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 05 PM Sun Aug 31 2025 63F 54F / 16% W 6 G 11 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 06 PM Sun Aug 31 2025 58F 52F / 23% W 7 G 12 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 07 PM Sun Aug 31 2025 58F 55F / 20% W 8 G 13 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 08 PM Sun Aug 31 2025 52F 51F / 28% NNW 10 G 14 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 09 PM Sun Aug 31 2025 49F 49F / 31% W 10 G 15 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 10 PM Sun Aug 31 2025 49F 50F / 24% SE 10 G 15 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 11 PM Sun Aug 31 2025 49F 49F / 25% SE 9 G 16 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 12 AM Mon Sep 01 2025 48F 49F / 28% SE 13 G 19 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 01 AM Mon Sep 01 2025 48F 49F / 25% SSE 12 G 19 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 02 AM Mon Sep 01 2025 49F 49F / 28% SSE 11 G 17 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 03 AM Mon Sep 01 2025 48F 49F / 23% SSE 12 G 20 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 04 AM Mon Sep 01 2025 48F 48F / 26% SSE 14 G 21 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 05 AM Mon Sep 01 2025 47F 49F / 24% S 14 G 22 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 06 AM Mon Sep 01 2025 47F 48F / 24% S 16 G 21 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"