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 20-Feb-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 11 AM Thu Feb 20 2025 19F 13F / 92% WNW 13 G 21 MPH 4500 FT 17:1 / 6% 0.00" / 0.0" 0.00" / 0.0" 1 12 PM Thu Feb 20 2025 20F 14F / 95% NW 12 G 19 MPH 4600 FT 15:1 / 7% 0.02" / 0.3" 0.02" / 0.3" 2 01 PM Thu Feb 20 2025 21F 14F / 97% NW 14 G 21 MPH 4600 FT 15:1 / 7% 0.00" / 0.0" 0.02" / 0.3" 3 02 PM Thu Feb 20 2025 21F 13F / 99% NNW 12 G 21 MPH 4700 FT 15:1 / 7% 0.00" / 0.0" 0.02" / 0.3" 4 03 PM Thu Feb 20 2025 22F 14F / 98% NW 12 G 19 MPH 4800 FT 15:1 / 7% 0.01" / 0.2" 0.03" / 0.5" 5 04 PM Thu Feb 20 2025 20F 13F / 97% NW 15 G 23 MPH 5000 FT 16:1 / 6% 0.01" / 0.2" 0.04" / 0.7" 6 05 PM Thu Feb 20 2025 18F 12F / 98% NW 16 G 27 MPH 5000 FT 15:1 / 7% 0.01" / 0.2" 0.05" / 0.9" 7 06 PM Thu Feb 20 2025 17F 11F / 98% NW 18 G 27 MPH 5000 FT 15:1 / 7% 0.01" / 0.2" 0.06" / 1.1" 8 07 PM Thu Feb 20 2025 16F 11F / 100% SSE 17 G 25 MPH 5000 FT 15:1 / 7% 0.01" / 0.2" 0.07" / 1.3" 9 08 PM Thu Feb 20 2025 16F 11F / 99% NNW 16 G 26 MPH 5100 FT 15:1 / 7% 0.01" / 0.2" 0.08" / 1.5" 10 09 PM Thu Feb 20 2025 16F 11F / 100% S 14 G 23 MPH 5100 FT 16:1 / 6% 0.00" / 0.0" 0.08" / 1.5" 11 10 PM Thu Feb 20 2025 16F 12F / 97% NW 15 G 23 MPH 4900 FT 16:1 / 6% 0.01" / 0.2" 0.09" / 1.7" 12 11 PM Thu Feb 20 2025 16F 11F / 96% NNW 14 G 22 MPH ≤ KSLC 16:1 / 6% 0.01" / 0.2" 0.10" / 1.9" 13 12 AM Fri Feb 21 2025 16F 11F / 96% NNW 14 G 22 MPH ≤ KSLC 19:1 / 5% 0.00" / 0.0" 0.10" / 1.9" 14 01 AM Fri Feb 21 2025 15F 11F / 91% NW 11 G 19 MPH ≤ KSLC 15:1 / 7% 0.00" / 0.0" 0.10" / 1.9" 15 02 AM Fri Feb 21 2025 14F 11F / 82% SE 10 G 16 MPH ≤ KSLC 16:1 / 6% 0.00" / 0.0" 0.10" / 1.9" 16 03 AM Fri Feb 21 2025 13F 11F / 79% NNW 11 G 16 MPH ≤ KSLC 14:1 / 7% 0.00" / 0.0" 0.10" / 1.9" 17 04 AM Fri Feb 21 2025 12F 11F / 77% NW 12 G 17 MPH ≤ KSLC 14:1 / 7% 0.00" / 0.0" 0.10" / 1.9" 18 05 AM Fri Feb 21 2025 12F 11F / 73% ESE 12 G 17 MPH ≤ KSLC 13:1 / 8% 0.00" / 0.0" 0.10" / 1.9" 19 06 AM Fri Feb 21 2025 13F 11F / 71% NNW 12 G 17 MPH ≤ KSLC 13:1 / 8% 0.00" / 0.0" 0.10" / 1.9" 20 07 AM Fri Feb 21 2025 12F 11F / 65% NNW 11 G 17 MPH ≤ KSLC 13:1 / 8% 0.00" / 0.0" 0.10" / 1.9" 21 08 AM Fri Feb 21 2025 12F 12F / 66% NNW 12 G 15 MPH ≤ KSLC 13:1 / 8% 0.00" / 0.0" 0.10" / 1.9" 22 09 AM Fri Feb 21 2025 14F 13F / 64% NW 12 G 16 MPH ≤ KSLC 13:1 / 8% 0.00" / 0.0" 0.10" / 1.9" 23 10 AM Fri Feb 21 2025 16F 15F / 65% NNW 11 G 15 MPH 4400 FT 12:1 / 8% 0.00" / 0.0" 0.10" / 1.9" 24 11 AM Fri Feb 21 2025 21F 16F / 60% NNW 9 G 13 MPH 4600 FT 11:1 / 9% 0.00" / 0.0" 0.10" / 1.9" 25 12 PM Fri Feb 21 2025 23F 17F / 67% NNW 8 G 13 MPH 4800 FT 12:1 / 8% 0.00" / 0.0" 0.10" / 1.9" 26 01 PM Fri Feb 21 2025 24F 18F / 64% NW 6 G 9 MPH 5000 FT 11:1 / 9% 0.00" / 0.0" 0.10" / 1.9" 27 02 PM Fri Feb 21 2025 24F 18F / 68% NW 8 G 10 MPH 5200 FT 11:1 / 9% 0.00" / 0.0" 0.10" / 1.9" 28 03 PM Fri Feb 21 2025 23F 20F / 56% NW 10 G 13 MPH 5300 FT 10:1 / 10% 0.00" / 0.0" 0.10" / 1.9" 29 04 PM Fri Feb 21 2025 22F 21F / 55% NW 10 G 15 MPH 5400 FT 10:1 / 10% 0.00" / 0.0" 0.10" / 1.9" 30 05 PM Fri Feb 21 2025 21F 20F / 64% WNW 10 G 14 MPH 5400 FT 10:1 / 10% 0.00" / 0.0" 0.10" / 1.9" 31 06 PM Fri Feb 21 2025 20F 19F / 53% WNW 10 G 12 MPH 5300 FT 10:1 / 10% 0.00" / 0.0" 0.10" / 1.9" 32 07 PM Fri Feb 21 2025 16F 17F / 52% WNW 12 G 17 MPH 5200 FT 10:1 / 10% 0.00" / 0.0" 0.10" / 1.9" 33 08 PM Fri Feb 21 2025 17F 17F / 44% W 14 G 18 MPH 5100 FT 10:1 / 10% 0.00" / 0.0" 0.10" / 1.9" 34 09 PM Fri Feb 21 2025 18F 18F / 37% W 17 G 22 MPH 4700 FT 10:1 / 10% 0.00" / 0.0" 0.10" / 1.9" 35 10 PM Fri Feb 21 2025 18F 18F / 33% W 18 G 25 MPH 4500 FT 9:1 / 11% 0.00" / 0.0" 0.10" / 1.9" 36 11 PM Fri Feb 21 2025 17F 18F / 37% W 18 G 26 MPH 4800 FT 9:1 / 11% 0.00" / 0.0" 0.10" / 1.9" 37 12 AM Sat Feb 22 2025 17F 19F / 35% W 21 G 28 MPH 4900 FT 8:1 / 12% 0.00" / 0.0" 0.10" / 1.9" 38 01 AM Sat Feb 22 2025 18F 19F / 29% W 21 G 30 MPH 4700 FT 8:1 / 12% 0.00" / 0.0" 0.10" / 1.9" 39 02 AM Sat Feb 22 2025 18F 19F / 31% W 21 G 30 MPH 4700 FT 8:1 / 12% 0.00" / 0.0" 0.10" / 1.9" 40 03 AM Sat Feb 22 2025 17F 17F / 36% W 22 G 32 MPH 4600 FT 8:1 / 12% 0.00" / 0.0" 0.10" / 1.9" 41 04 AM Sat Feb 22 2025 17F 18F / 41% W 23 G 33 MPH 4500 FT 8:1 / 12% 0.00" / 0.0" 0.10" / 1.9" 42 05 AM Sat Feb 22 2025 17F 17F / 43% WNW 25 G 37 MPH ≤ KSLC 8:1 / 12% 0.00" / 0.0" 0.10" / 1.9" 43 06 AM Sat Feb 22 2025 18F 17F / 50% WNW 24 G 34 MPH ≤ KSLC 9:1 / 11% 0.00" / 0.0" 0.10" / 1.9" 44 07 AM Sat Feb 22 2025 18F 16F / 53% WNW 24 G 34 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.10" / 1.9" 45 08 AM Sat Feb 22 2025 18F 16F / 72% WNW 23 G 33 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.10" / 1.9" 46 09 AM Sat Feb 22 2025 18F 15F / 72% WNW 25 G 37 MPH 4400 FT 9:1 / 11% 0.00" / 0.0" 0.10" / 1.9" 47 10 AM Sat Feb 22 2025 22F 18F / 78% WNW 24 G 36 MPH 4700 FT 9:1 / 11% 0.00" / 0.0" 0.10" / 1.9" 48 11 AM Sat Feb 22 2025 25F 19F / 77% WNW 22 G 34 MPH 4900 FT 9:1 / 11% 0.00" / 0.0" 0.10" / 1.9"