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 01-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 Sun Aug 31 2025 58F 54F / 35% W 4 G 10 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 PM Sun Aug 31 2025 57F 53F / 29% WSW 5 G 7 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 PM Sun Aug 31 2025 51F 50F / 48% WNW 6 G 9 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 PM Sun Aug 31 2025 50F 49F / 44% SSE 7 G 11 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 PM Sun Aug 31 2025 49F 49F / 45% SE 8 G 14 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 PM Sun Aug 31 2025 50F 49F / 45% ESE 10 G 15 MPH 13700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 AM Mon Sep 01 2025 49F 49F / 42% ESE 10 G 15 MPH 13500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 AM Mon Sep 01 2025 49F 48F / 43% SE 10 G 15 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 AM Mon Sep 01 2025 49F 48F / 49% SSE 10 G 17 MPH 13400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 AM Mon Sep 01 2025 48F 48F / 35% SSE 12 G 18 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 AM Mon Sep 01 2025 48F 48F / 31% S 13 G 20 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 AM Mon Sep 01 2025 48F 48F / 32% S 14 G 21 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 AM Mon Sep 01 2025 47F 47F / 33% S 14 G 21 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 AM Mon Sep 01 2025 47F 47F / 37% SSW 14 G 21 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 AM Mon Sep 01 2025 48F 47F / 40% SSW 12 G 18 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 AM Mon Sep 01 2025 50F 48F / 34% SSW 12 G 18 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 AM Mon Sep 01 2025 52F 49F / 32% SSW 9 G 17 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 AM Mon Sep 01 2025 57F 51F / 28% SSW 8 G 15 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 PM Mon Sep 01 2025 61F 52F / 19% SW 8 G 13 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 PM Mon Sep 01 2025 63F 54F / 20% W 8 G 17 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 PM Mon Sep 01 2025 63F 55F / 19% W 9 G 16 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 PM Mon Sep 01 2025 65F 55F / 15% W 7 G 15 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 PM Mon Sep 01 2025 63F 55F / 13% W 8 G 16 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 PM Mon Sep 01 2025 63F 55F / 15% W 11 G 16 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 PM Mon Sep 01 2025 60F 55F / 19% WNW 10 G 18 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 07 PM Mon Sep 01 2025 57F 54F / 19% W 10 G 17 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 08 PM Mon Sep 01 2025 53F 50F / 26% WSW 9 G 13 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 09 PM Mon Sep 01 2025 50F 50F / 24% WSW 11 G 16 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 10 PM Mon Sep 01 2025 51F 50F / 20% WSW 12 G 17 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 11 PM Mon Sep 01 2025 50F 50F / 27% WSW 12 G 16 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 12 AM Tue Sep 02 2025 49F 49F / 20% WSW 13 G 15 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 01 AM Tue Sep 02 2025 49F 49F / 20% W 14 G 18 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 02 AM Tue Sep 02 2025 49F 48F / 26% W 14 G 17 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 03 AM Tue Sep 02 2025 49F 47F / 28% WSW 13 G 16 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 04 AM Tue Sep 02 2025 48F 47F / 23% W 13 G 17 MPH 12700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 05 AM Tue Sep 02 2025 48F 47F / 27% W 15 G 21 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 06 AM Tue Sep 02 2025 48F 47F / 23% W 17 G 23 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 07 AM Tue Sep 02 2025 47F 48F / 21% WNW 18 G 23 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 08 AM Tue Sep 02 2025 47F 49F / 13% WNW 17 G 23 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 09 AM Tue Sep 02 2025 50F 50F / 9% WNW 16 G 21 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 10 AM Tue Sep 02 2025 55F 51F / 10% NW 13 G 19 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 11 AM Tue Sep 02 2025 60F 53F / 3% WNW 11 G 17 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 12 PM Tue Sep 02 2025 64F 55F / 7% WNW 10 G 17 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 01 PM Tue Sep 02 2025 65F 57F / 5% W 12 G 23 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 02 PM Tue Sep 02 2025 66F 56F / 12% WNW 13 G 22 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 03 PM Tue Sep 02 2025 66F 57F / 19% WNW 15 G 25 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 04 PM Tue Sep 02 2025 65F 56F / 19% WNW 14 G 24 MPH 13300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 05 PM Tue Sep 02 2025 65F 56F / 25% WNW 16 G 25 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 06 PM Tue Sep 02 2025 62F 56F / 23% WNW 16 G 24 MPH 13200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"