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 16-Apr-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 Wed Apr 16 2025 39F 32F / 47% WSW 15 G 26 MPH 8500 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 1 01 PM Wed Apr 16 2025 43F 34F / 52% WSW 10 G 17 MPH 8800 FT 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 2 02 PM Wed Apr 16 2025 45F 35F / 50% SW 8 G 16 MPH 9000 FT 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 3 03 PM Wed Apr 16 2025 45F 36F / 50% SSW 10 G 20 MPH 9200 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 4 04 PM Wed Apr 16 2025 35F 30F / 76% WSW 8 G 12 MPH 9500 FT 9:1 / 11% 0.04" / 0.4" 0.04" / 0.4" 5 05 PM Wed Apr 16 2025 42F 34F / 53% WSW 12 G 20 MPH 9600 FT 10:1 / 10% 0.00" / 0.0" 0.04" / 0.4" 6 06 PM Wed Apr 16 2025 39F 32F / 60% WSW 7 G 14 MPH 9400 FT 9:1 / 11% 0.00" / 0.0" 0.04" / 0.4" 7 07 PM Wed Apr 16 2025 33F 29F / 84% W 11 G 20 MPH 9500 FT 10:1 / 10% 0.01" / 0.1" 0.05" / 0.5" 8 08 PM Wed Apr 16 2025 34F 29F / 74% WSW 14 G 24 MPH 9400 FT 8:1 / 12% 0.00" / 0.0" 0.05" / 0.5" 9 09 PM Wed Apr 16 2025 33F 29F / 66% SW 21 G 35 MPH 9400 FT 7:1 / 14% 0.00" / 0.0" 0.05" / 0.5" 10 10 PM Wed Apr 16 2025 33F 29F / 63% WSW 22 G 35 MPH 9300 FT 9:1 / 11% 0.00" / 0.0" 0.05" / 0.5" 11 11 PM Wed Apr 16 2025 33F 29F / 64% WSW 20 G 31 MPH 9200 FT 8:1 / 12% 0.00" / 0.0" 0.05" / 0.5" 12 12 AM Thu Apr 17 2025 32F 29F / 67% WSW 21 G 33 MPH 9100 FT 8:1 / 12% 0.00" / 0.0" 0.05" / 0.5" 13 01 AM Thu Apr 17 2025 32F 28F / 70% WSW 20 G 31 MPH 9100 FT 8:1 / 12% 0.00" / 0.0" 0.05" / 0.5" 14 02 AM Thu Apr 17 2025 32F 28F / 64% WSW 21 G 33 MPH 9200 FT 8:1 / 12% 0.00" / 0.0" 0.05" / 0.5" 15 03 AM Thu Apr 17 2025 32F 28F / 64% WSW 21 G 31 MPH 9100 FT 8:1 / 12% 0.00" / 0.0" 0.05" / 0.5" 16 04 AM Thu Apr 17 2025 32F 28F / 72% SW 22 G 36 MPH 9000 FT 7:1 / 14% 0.00" / 0.0" 0.05" / 0.5" 17 05 AM Thu Apr 17 2025 32F 27F / 75% SW 26 G 43 MPH 8500 FT 8:1 / 12% 0.00" / 0.0" 0.05" / 0.5" 18 06 AM Thu Apr 17 2025 31F 24F / 95% WSW 18 G 30 MPH 8300 FT 9:1 / 11% 0.00" / 0.0" 0.05" / 0.5" 19 07 AM Thu Apr 17 2025 29F 23F / 100% WSW 18 G 30 MPH 7600 FT 11:1 / 9% 0.02" / 0.2" 0.07" / 0.7" 20 08 AM Thu Apr 17 2025 28F 21F / 98% W 18 G 30 MPH 7000 FT 9:1 / 11% 0.03" / 0.3" 0.10" / 1.0" 21 09 AM Thu Apr 17 2025 27F 20F / 99% WSW 21 G 32 MPH 6900 FT 11:1 / 9% 0.08" / 0.9" 0.18" / 1.9" 22 10 AM Thu Apr 17 2025 26F 19F / 97% W 19 G 32 MPH 6700 FT 12:1 / 8% 0.02" / 0.2" 0.20" / 2.1" 23 11 AM Thu Apr 17 2025 25F 18F / 91% W 22 G 36 MPH 5200 FT 10:1 / 10% 0.01" / 0.1" 0.21" / 2.2" 24 12 PM Thu Apr 17 2025 24F 15F / 87% W 20 G 35 MPH 4500 FT 12:1 / 8% 0.00" / 0.0" 0.21" / 2.2" 25 01 PM Thu Apr 17 2025 24F 14F / 62% W 21 G 34 MPH 4600 FT 17:1 / 6% 0.00" / 0.0" 0.21" / 2.2" 26 02 PM Thu Apr 17 2025 26F 14F / 58% W 23 G 35 MPH 4600 FT 17:1 / 6% 0.00" / 0.0" 0.21" / 2.2" 27 03 PM Thu Apr 17 2025 26F 14F / 65% W 23 G 35 MPH 4800 FT 15:1 / 7% 0.00" / 0.0" 0.21" / 2.2" 28 04 PM Thu Apr 17 2025 26F 14F / 64% W 23 G 35 MPH 4900 FT 14:1 / 7% 0.00" / 0.0" 0.21" / 2.2" 29 05 PM Thu Apr 17 2025 25F 14F / 65% W 24 G 39 MPH 5400 FT 15:1 / 7% 0.00" / 0.0" 0.21" / 2.2" 30 06 PM Thu Apr 17 2025 24F 14F / 82% W 22 G 35 MPH 5100 FT 14:1 / 7% 0.00" / 0.0" 0.21" / 2.2" 31 07 PM Thu Apr 17 2025 20F 12F / 83% W 23 G 37 MPH 5300 FT 13:1 / 8% 0.00" / 0.0" 0.21" / 2.2" 32 08 PM Thu Apr 17 2025 18F 10F / 93% WNW 25 G 37 MPH 5500 FT 14:1 / 7% 0.00" / 0.0" 0.21" / 2.2" 33 09 PM Thu Apr 17 2025 17F 9F / 91% WNW 26 G 38 MPH 5500 FT 13:1 / 8% 0.00" / 0.0" 0.21" / 2.2" 34 10 PM Thu Apr 17 2025 16F 10F / 81% W 24 G 35 MPH 5100 FT 15:1 / 7% 0.00" / 0.0" 0.21" / 2.2" 35 11 PM Thu Apr 17 2025 16F 10F / 94% WNW 18 G 25 MPH 4700 FT 21:1 / 5% 0.01" / 0.2" 0.22" / 2.4" 36 12 AM Fri Apr 18 2025 15F 9F / 85% WNW 17 G 27 MPH 4700 FT 18:1 / 6% 0.10" / 1.8" 0.32" / 4.2" 37 01 AM Fri Apr 18 2025 11F 7F / 92% WNW 17 G 23 MPH 4900 FT 19:1 / 5% 0.00" / 0.0" 0.32" / 4.2" 38 02 AM Fri Apr 18 2025 12F 8F / 84% W 11 G 15 MPH 4800 FT 19:1 / 5% 0.01" / 0.2" 0.33" / 4.4" 39 03 AM Fri Apr 18 2025 13F 9F / 87% W 10 G 12 MPH 4800 FT 22:1 / 5% 0.01" / 0.2" 0.34" / 4.6" 40 04 AM Fri Apr 18 2025 11F 6F / 91% WNW 10 G 16 MPH ≤ KSLC 22:1 / 5% 0.05" / 1.1" 0.39" / 5.7" 41 05 AM Fri Apr 18 2025 14F 8F / 93% NW 16 G 22 MPH ≤ KSLC 22:1 / 5% 0.16" / 3.5" 0.55" / 9.2" 42 06 AM Fri Apr 18 2025 13F 7F / 89% WNW 18 G 25 MPH ≤ KSLC 22:1 / 5% 0.02" / 0.4" 0.57" / 9.6" 43 07 AM Fri Apr 18 2025 11F 7F / 84% WNW 18 G 22 MPH ≤ KSLC 22:1 / 5% 0.00" / 0.0" 0.57" / 9.6" 44 08 AM Fri Apr 18 2025 12F 7F / 78% WNW 19 G 24 MPH ≤ KSLC 24:1 / 4% 0.00" / 0.0" 0.57" / 9.6" 45 09 AM Fri Apr 18 2025 13F 8F / 80% NW 15 G 23 MPH ≤ KSLC 25:1 / 4% 0.00" / 0.0" 0.57" / 9.6" 46 10 AM Fri Apr 18 2025 14F 8F / 89% NW 10 G 18 MPH ≤ KSLC 24:1 / 4% 0.00" / 0.0" 0.57" / 9.6" 47 11 AM Fri Apr 18 2025 17F 9F / 94% NW 6 G 12 MPH ≤ KSLC 24:1 / 4% 0.00" / 0.0" 0.57" / 9.6" 48 12 PM Fri Apr 18 2025 17F 10F / 85% NNW 8 G 16 MPH ≤ KSLC 25:1 / 4% 0.01" / 0.2" 0.58" / 9.8"