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 31-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 PM Sat Aug 30 2025 55F 49F / 53% WNW 8 G 16 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 PM Sat Aug 30 2025 51F 47F / 62% WNW 9 G 15 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 PM Sat Aug 30 2025 47F 44F / 76% NW 8 G 13 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 PM Sat Aug 30 2025 45F 44F / 66% NNE 9 G 14 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 PM Sat Aug 30 2025 45F 44F / 62% NE 12 G 17 MPH 11800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 PM Sat Aug 30 2025 44F 44F / 55% NE 14 G 20 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 AM Sun Aug 31 2025 44F 44F / 48% ENE 14 G 24 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 AM Sun Aug 31 2025 44F 43F / 45% ENE 14 G 23 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 AM Sun Aug 31 2025 43F 43F / 49% E 12 G 22 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 AM Sun Aug 31 2025 43F 43F / 36% ESE 13 G 20 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 AM Sun Aug 31 2025 43F 43F / 35% SE 11 G 17 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 AM Sun Aug 31 2025 44F 44F / 42% SSE 10 G 15 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 AM Sun Aug 31 2025 44F 44F / 42% SSE 11 G 17 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 AM Sun Aug 31 2025 45F 44F / 41% SSE 12 G 19 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 AM Sun Aug 31 2025 45F 43F / 47% SE 11 G 18 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 AM Sun Aug 31 2025 47F 45F / 46% SSE 11 G 17 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 AM Sun Aug 31 2025 50F 46F / 41% SSE 8 G 15 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 AM Sun Aug 31 2025 54F 48F / 41% SSE 7 G 15 MPH 12200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 PM Sun Aug 31 2025 58F 50F / 35% S 7 G 12 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 PM Sun Aug 31 2025 61F 52F / 21% WSW 7 G 14 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 PM Sun Aug 31 2025 62F 52F / 27% WNW 7 G 14 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 PM Sun Aug 31 2025 63F 53F / 17% WSW 6 G 13 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 PM Sun Aug 31 2025 63F 53F / 16% WSW 7 G 12 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 PM Sun Aug 31 2025 63F 54F / 14% SW 6 G 13 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 PM Sun Aug 31 2025 59F 55F / 21% SSW 8 G 14 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 07 PM Sun Aug 31 2025 57F 53F / 20% WSW 8 G 14 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 08 PM Sun Aug 31 2025 52F 49F / 31% WNW 8 G 12 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 09 PM Sun Aug 31 2025 49F 49F / 33% WSW 8 G 14 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 10 PM Sun Aug 31 2025 49F 48F / 25% SSW 9 G 14 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 11 PM Sun Aug 31 2025 49F 48F / 28% SSW 11 G 15 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 12 AM Mon Sep 01 2025 48F 48F / 36% SE 12 G 17 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 01 AM Mon Sep 01 2025 48F 48F / 29% S 12 G 19 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 02 AM Mon Sep 01 2025 48F 47F / 29% S 12 G 18 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 03 AM Mon Sep 01 2025 48F 47F / 24% SSE 14 G 22 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 04 AM Mon Sep 01 2025 47F 47F / 27% SSE 14 G 25 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 05 AM Mon Sep 01 2025 48F 47F / 25% S 16 G 26 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 06 AM Mon Sep 01 2025 46F 46F / 29% S 15 G 24 MPH 12300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 07 AM Mon Sep 01 2025 46F 47F / 31% S 15 G 22 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 08 AM Mon Sep 01 2025 47F 48F / 32% SSW 14 G 20 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 09 AM Mon Sep 01 2025 49F 50F / 30% SSW 13 G 19 MPH 12400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 10 AM Mon Sep 01 2025 53F 50F / 27% WSW 11 G 17 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 11 AM Mon Sep 01 2025 58F 52F / 21% SSW 9 G 14 MPH 12500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 12 PM Mon Sep 01 2025 63F 55F / 6% WSW 8 G 15 MPH 12600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 01 PM Mon Sep 01 2025 64F 56F / 4% W 11 G 19 MPH 12800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 02 PM Mon Sep 01 2025 64F 56F / 8% W 12 G 21 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 03 PM Mon Sep 01 2025 65F 56F / 7% W 10 G 17 MPH 12900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 04 PM Mon Sep 01 2025 64F 56F / 10% W 9 G 16 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 05 PM Mon Sep 01 2025 64F 56F / 13% WNW 13 G 21 MPH 13000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 06 PM Mon Sep 01 2025 61F 56F / 16% W 11 G 16 MPH 13100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"