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 18-Mar-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 Tue Mar 18 2025 12F 5F / 94% WNW 27 G 41 MPH ≤ KSLC 15:1 / 7% 0.00" / 0.0" 0.00" / 0.0" 1 01 PM Tue Mar 18 2025 16F 7F / 86% WNW 27 G 44 MPH ≤ KSLC 15:1 / 7% 0.04" / 0.6" 0.04" / 0.6" 2 02 PM Tue Mar 18 2025 15F 6F / 86% WNW 26 G 40 MPH ≤ KSLC 17:1 / 6% 0.04" / 0.7" 0.08" / 1.3" 3 03 PM Tue Mar 18 2025 17F 6F / 96% WNW 30 G 47 MPH ≤ KSLC 14:1 / 7% 0.11" / 1.5" 0.19" / 2.8" 4 04 PM Tue Mar 18 2025 17F 6F / 92% WNW 26 G 43 MPH 4300 FT 14:1 / 7% 0.02" / 0.3" 0.21" / 3.1" 5 05 PM Tue Mar 18 2025 15F 6F / 100% WNW 25 G 38 MPH ≤ KSLC 17:1 / 6% 0.04" / 0.7" 0.25" / 3.8" 6 06 PM Tue Mar 18 2025 12F 4F / 98% WNW 30 G 47 MPH ≤ KSLC 12:1 / 8% 0.14" / 1.7" 0.39" / 5.5" 7 07 PM Tue Mar 18 2025 11F 4F / 94% NW 25 G 35 MPH ≤ KSLC 17:1 / 6% 0.07" / 1.2" 0.46" / 6.7" 8 08 PM Tue Mar 18 2025 10F 3F / 97% NW 26 G 39 MPH ≤ KSLC 15:1 / 7% 0.16" / 2.4" 0.62" / 9.1" 9 09 PM Tue Mar 18 2025 9F 3F / 77% NW 28 G 43 MPH ≤ KSLC 13:1 / 8% 0.01" / 0.1" 0.63" / 9.2" 10 10 PM Tue Mar 18 2025 8F 2F / 95% NW 29 G 39 MPH ≤ KSLC 13:1 / 8% 0.00" / 0.0" 0.63" / 9.2" 11 11 PM Tue Mar 18 2025 7F 2F / 84% NW 26 G 40 MPH ≤ KSLC 15:1 / 7% 0.00" / 0.0" 0.63" / 9.2" 12 12 AM Wed Mar 19 2025 7F 2F / 88% NW 26 G 40 MPH ≤ KSLC 14:1 / 7% 0.00" / 0.0" 0.63" / 9.2" 13 01 AM Wed Mar 19 2025 7F 2F / 85% NW 25 G 36 MPH ≤ KSLC 16:1 / 6% 0.00" / 0.0" 0.63" / 9.2" 14 02 AM Wed Mar 19 2025 7F 2F / 88% NW 21 G 34 MPH ≤ KSLC 17:1 / 6% 0.00" / 0.0" 0.63" / 9.2" 15 03 AM Wed Mar 19 2025 6F 2F / 85% NW 18 G 33 MPH ≤ KSLC 18:1 / 6% 0.00" / 0.0" 0.63" / 9.2" 16 04 AM Wed Mar 19 2025 6F 2F / 86% NW 20 G 31 MPH ≤ KSLC 19:1 / 5% 0.00" / 0.0" 0.63" / 9.2" 17 05 AM Wed Mar 19 2025 5F 1F / 87% NNW 20 G 30 MPH ≤ KSLC 21:1 / 5% 0.00" / 0.0" 0.63" / 9.2" 18 06 AM Wed Mar 19 2025 4F 1F / 81% NNW 19 G 28 MPH ≤ KSLC 22:1 / 5% 0.00" / 0.0" 0.63" / 9.2" 19 07 AM Wed Mar 19 2025 4F 1F / 81% NNW 17 G 27 MPH ≤ KSLC 21:1 / 5% 0.00" / 0.0" 0.63" / 9.2" 20 08 AM Wed Mar 19 2025 4F 1F / 78% NNW 18 G 26 MPH ≤ KSLC 22:1 / 5% 0.00" / 0.0" 0.63" / 9.2" 21 09 AM Wed Mar 19 2025 5F 2F / 73% NW 18 G 24 MPH ≤ KSLC 23:1 / 4% 0.00" / 0.0" 0.63" / 9.2" 22 10 AM Wed Mar 19 2025 8F 5F / 70% SE 15 G 22 MPH ≤ KSLC 20:1 / 5% 0.00" / 0.0" 0.63" / 9.2" 23 11 AM Wed Mar 19 2025 11F 6F / 67% SE 16 G 20 MPH ≤ KSLC 20:1 / 5% 0.00" / 0.0" 0.63" / 9.2" 24 12 PM Wed Mar 19 2025 15F 8F / 69% NW 12 G 17 MPH ≤ KSLC 17:1 / 6% 0.00" / 0.0" 0.63" / 9.2" 25 01 PM Wed Mar 19 2025 17F 10F / 76% NW 9 G 15 MPH ≤ KSLC 18:1 / 6% 0.00" / 0.0" 0.63" / 9.2" 26 02 PM Wed Mar 19 2025 20F 11F / 90% NW 10 G 13 MPH 4300 FT 18:1 / 6% 0.00" / 0.0" 0.63" / 9.2" 27 03 PM Wed Mar 19 2025 20F 11F / 100% WNW 10 G 12 MPH 4400 FT 19:1 / 5% 0.00" / 0.0" 0.63" / 9.2" 28 04 PM Wed Mar 19 2025 20F 13F / 77% WNW 12 G 15 MPH 4500 FT 15:1 / 7% 0.00" / 0.0" 0.63" / 9.2" 29 05 PM Wed Mar 19 2025 20F 15F / 70% WNW 11 G 15 MPH 4500 FT 12:1 / 8% 0.00" / 0.0" 0.63" / 9.2" 30 06 PM Wed Mar 19 2025 19F 15F / 52% W 13 G 18 MPH 4400 FT 13:1 / 8% 0.00" / 0.0" 0.63" / 9.2" 31 07 PM Wed Mar 19 2025 18F 15F / 53% W 14 G 19 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.63" / 9.2" 32 08 PM Wed Mar 19 2025 14F 14F / 47% W 16 G 23 MPH ≤ KSLC 9:1 / 11% 0.00" / 0.0" 0.63" / 9.2" 33 09 PM Wed Mar 19 2025 15F 14F / 44% WSW 17 G 23 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.63" / 9.2" 34 10 PM Wed Mar 19 2025 16F 15F / 43% WSW 18 G 26 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.63" / 9.2" 35 11 PM Wed Mar 19 2025 17F 16F / 43% WSW 19 G 26 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.63" / 9.2" 36 12 AM Thu Mar 20 2025 18F 16F / 50% WSW 19 G 28 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.63" / 9.2" 37 01 AM Thu Mar 20 2025 18F 16F / 66% WSW 17 G 29 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.63" / 9.2" 38 02 AM Thu Mar 20 2025 19F 16F / 83% WSW 18 G 28 MPH ≤ KSLC 12:1 / 8% 0.01" / 0.1" 0.64" / 9.3" 39 03 AM Thu Mar 20 2025 20F 18F / 61% SW 22 G 35 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.64" / 9.3" 40 04 AM Thu Mar 20 2025 20F 18F / 52% SSW 23 G 40 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.64" / 9.3" 41 05 AM Thu Mar 20 2025 20F 18F / 55% SW 26 G 41 MPH 4400 FT 10:1 / 10% 0.00" / 0.0" 0.64" / 9.3" 42 06 AM Thu Mar 20 2025 20F 17F / 48% SW 26 G 45 MPH 4400 FT 10:1 / 10% 0.00" / 0.0" 0.64" / 9.3" 43 07 AM Thu Mar 20 2025 19F 16F / 53% SW 26 G 43 MPH 4600 FT 10:1 / 10% 0.00" / 0.0" 0.64" / 9.3" 44 08 AM Thu Mar 20 2025 19F 16F / 63% WSW 24 G 40 MPH 4800 FT 12:1 / 8% 0.00" / 0.0" 0.64" / 9.3" 45 09 AM Thu Mar 20 2025 21F 17F / 62% WSW 22 G 36 MPH 4900 FT 12:1 / 8% 0.00" / 0.0" 0.64" / 9.3" 46 10 AM Thu Mar 20 2025 21F 16F / 75% WSW 19 G 30 MPH 4800 FT 16:1 / 6% 0.01" / 0.2" 0.65" / 9.5" 47 11 AM Thu Mar 20 2025 21F 16F / 89% WSW 21 G 36 MPH 5200 FT 14:1 / 7% 0.02" / 0.3" 0.67" / 9.8" 48 12 PM Thu Mar 20 2025 22F 16F / 85% WSW 20 G 32 MPH 5100 FT 16:1 / 6% 0.01" / 0.2" 0.68" / 10.0"