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 17-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 06 PM Wed Apr 16 2025 35F 29F / 69% W 19 G 31 MPH 9300 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 1 07 PM Wed Apr 16 2025 35F 30F / 61% W 22 G 37 MPH 9400 FT 7:1 / 14% 0.00" / 0.0" 0.00" / 0.0" 2 08 PM Wed Apr 16 2025 34F 30F / 58% WSW 18 G 28 MPH 9400 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 3 09 PM Wed Apr 16 2025 33F 29F / 60% W 16 G 25 MPH 9500 FT 11:1 / 9% 0.00" / 0.0" 0.00" / 0.0" 4 10 PM Wed Apr 16 2025 33F 29F / 60% W 19 G 30 MPH 9300 FT 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 5 11 PM Wed Apr 16 2025 32F 28F / 65% WSW 19 G 31 MPH 9400 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 6 12 AM Thu Apr 17 2025 30F 28F / 65% WSW 19 G 31 MPH 9300 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 7 01 AM Thu Apr 17 2025 30F 27F / 73% WSW 18 G 31 MPH 9300 FT 8:1 / 12% 0.00" / 0.0" 0.00" / 0.0" 8 02 AM Thu Apr 17 2025 29F 26F / 75% SW 19 G 31 MPH 9200 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 9 03 AM Thu Apr 17 2025 30F 27F / 70% W 24 G 37 MPH 9000 FT 8:1 / 12% 0.00" / 0.0" 0.00" / 0.0" 10 04 AM Thu Apr 17 2025 30F 26F / 68% WSW 23 G 38 MPH 8900 FT 8:1 / 12% 0.00" / 0.0" 0.00" / 0.0" 11 05 AM Thu Apr 17 2025 30F 27F / 73% WSW 23 G 38 MPH 8700 FT 8:1 / 12% 0.00" / 0.0" 0.00" / 0.0" 12 06 AM Thu Apr 17 2025 31F 25F / 85% SW 21 G 36 MPH 8500 FT 8:1 / 12% 0.00" / 0.0" 0.00" / 0.0" 13 07 AM Thu Apr 17 2025 30F 24F / 88% WSW 23 G 37 MPH 8400 FT 9:1 / 11% 0.07" / 0.6" 0.07" / 0.6" 14 08 AM Thu Apr 17 2025 29F 23F / 100% W 17 G 27 MPH 7700 FT 9:1 / 11% 0.11" / 1.0" 0.18" / 1.6" 15 09 AM Thu Apr 17 2025 28F 21F / 100% WSW 24 G 39 MPH 6900 FT 8:1 / 12% 0.09" / 0.7" 0.27" / 2.3" 16 10 AM Thu Apr 17 2025 27F 20F / 96% W 19 G 32 MPH 5900 FT 12:1 / 8% 0.04" / 0.5" 0.31" / 2.8" 17 11 AM Thu Apr 17 2025 26F 18F / 92% W 17 G 28 MPH 6000 FT 12:1 / 8% 0.01" / 0.1" 0.32" / 2.9" 18 12 PM Thu Apr 17 2025 25F 16F / 91% W 17 G 33 MPH 5000 FT 11:1 / 9% 0.02" / 0.2" 0.34" / 3.1" 19 01 PM Thu Apr 17 2025 25F 15F / 84% W 18 G 32 MPH 4400 FT 15:1 / 7% 0.00" / 0.0" 0.34" / 3.1" 20 02 PM Thu Apr 17 2025 24F 13F / 73% W 18 G 32 MPH 4500 FT 17:1 / 6% 0.00" / 0.0" 0.34" / 3.1" 21 03 PM Thu Apr 17 2025 24F 14F / 67% W 17 G 29 MPH 4600 FT 16:1 / 6% 0.00" / 0.0" 0.34" / 3.1" 22 04 PM Thu Apr 17 2025 25F 13F / 64% W 23 G 36 MPH 5100 FT 15:1 / 7% 0.00" / 0.0" 0.34" / 3.1" 23 05 PM Thu Apr 17 2025 24F 12F / 86% W 24 G 40 MPH 5300 FT 15:1 / 7% 0.00" / 0.0" 0.34" / 3.1" 24 06 PM Thu Apr 17 2025 22F 13F / 76% W 27 G 46 MPH 5300 FT 14:1 / 7% 0.00" / 0.0" 0.34" / 3.1" 25 07 PM Thu Apr 17 2025 20F 11F / 88% WNW 25 G 38 MPH 5300 FT 13:1 / 8% 0.00" / 0.0" 0.34" / 3.1" 26 08 PM Thu Apr 17 2025 18F 10F / 89% WNW 22 G 34 MPH 5400 FT 12:1 / 8% 0.00" / 0.0" 0.34" / 3.1" 27 09 PM Thu Apr 17 2025 16F 10F / 86% WNW 21 G 30 MPH 5300 FT 15:1 / 7% 0.00" / 0.0" 0.34" / 3.1" 28 10 PM Thu Apr 17 2025 15F 10F / 94% WNW 16 G 24 MPH 5200 FT 17:1 / 6% 0.01" / 0.2" 0.35" / 3.3" 29 11 PM Thu Apr 17 2025 15F 9F / 90% WNW 17 G 26 MPH 5000 FT 20:1 / 5% 0.07" / 1.4" 0.42" / 4.7" 30 12 AM Fri Apr 18 2025 13F 9F / 93% WSW 11 G 17 MPH 4800 FT 17:1 / 6% 0.05" / 0.8" 0.47" / 5.5" 31 01 AM Fri Apr 18 2025 14F 8F / 95% SW 11 G 17 MPH 4800 FT 20:1 / 5% 0.01" / 0.2" 0.48" / 5.7" 32 02 AM Fri Apr 18 2025 13F 9F / 84% SW 11 G 19 MPH 4900 FT 19:1 / 5% 0.00" / 0.0" 0.48" / 5.7" 33 03 AM Fri Apr 18 2025 12F 8F / 85% WSW 13 G 20 MPH 5000 FT 19:1 / 5% 0.00" / 0.0" 0.48" / 5.7" 34 04 AM Fri Apr 18 2025 12F 7F / 94% SSW 12 G 20 MPH 4400 FT 19:1 / 5% 0.00" / 0.0" 0.48" / 5.7" 35 05 AM Fri Apr 18 2025 14F 8F / 94% SW 12 G 21 MPH ≤ KSLC 21:1 / 5% 0.01" / 0.2" 0.49" / 5.9" 36 06 AM Fri Apr 18 2025 14F 8F / 91% WSW 10 G 16 MPH ≤ KSLC 21:1 / 5% 0.14" / 2.9" 0.63" / 8.8" 37 07 AM Fri Apr 18 2025 14F 9F / 91% SE 7 G 9 MPH ≤ KSLC 22:1 / 5% 0.06" / 1.3" 0.69" / 10.1" 38 08 AM Fri Apr 18 2025 14F 9F / 90% NW 11 G 16 MPH ≤ KSLC 21:1 / 5% 0.06" / 1.3" 0.75" / 11.4" 39 09 AM Fri Apr 18 2025 15F 8F / 94% NW 16 G 24 MPH ≤ KSLC 20:1 / 5% 0.11" / 2.2" 0.86" / 13.6" 40 10 AM Fri Apr 18 2025 15F 9F / 96% NW 14 G 23 MPH ≤ KSLC 23:1 / 4% 0.06" / 1.4" 0.92" / 15.0" 41 11 AM Fri Apr 18 2025 18F 11F / 85% ESE 8 G 14 MPH 4300 FT 22:1 / 5% 0.04" / 0.9" 0.96" / 15.9" 42 12 PM Fri Apr 18 2025 18F 12F / 87% N 7 G 15 MPH 4700 FT 21:1 / 5% 0.01" / 0.2" 0.97" / 16.1" 43 01 PM Fri Apr 18 2025 19F 12F / 93% NNE 13 G 25 MPH 4800 FT 19:1 / 5% 0.04" / 0.8" 1.01" / 16.9" 44 02 PM Fri Apr 18 2025 20F 13F / 93% N 15 G 24 MPH 4600 FT 20:1 / 5% 0.03" / 0.6" 1.04" / 17.5" 45 03 PM Fri Apr 18 2025 23F 14F / 91% NNW 18 G 28 MPH 4800 FT 19:1 / 5% 0.01" / 0.2" 1.05" / 17.7" 46 04 PM Fri Apr 18 2025 23F 13F / 91% NNW 18 G 30 MPH 4800 FT 17:1 / 6% 0.00" / 0.0" 1.05" / 17.7" 47 05 PM Fri Apr 18 2025 22F 13F / 85% NNW 17 G 28 MPH 4800 FT 16:1 / 6% 0.00" / 0.0" 1.05" / 17.7" 48 06 PM Fri Apr 18 2025 21F 13F / 83% NNW 17 G 25 MPH 4900 FT 15:1 / 7% 0.00" / 0.0" 1.05" / 17.7"