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 19-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 Wed Feb 19 2025 22F 19F / 63% WNW 19 G 29 MPH 4600 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 1 12 PM Wed Feb 19 2025 25F 19F / 58% W 15 G 24 MPH 5000 FT 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 2 01 PM Wed Feb 19 2025 26F 20F / 62% W 15 G 23 MPH 5200 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 3 02 PM Wed Feb 19 2025 27F 20F / 68% W 14 G 24 MPH 5300 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 4 03 PM Wed Feb 19 2025 26F 20F / 71% W 18 G 28 MPH 5400 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 5 04 PM Wed Feb 19 2025 24F 19F / 83% W 18 G 28 MPH 5600 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 6 05 PM Wed Feb 19 2025 25F 20F / 88% W 19 G 30 MPH 5600 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 7 06 PM Wed Feb 19 2025 24F 20F / 86% W 19 G 31 MPH 5500 FT 8:1 / 12% 0.00" / 0.0" 0.00" / 0.0" 8 07 PM Wed Feb 19 2025 24F 20F / 85% W 20 G 31 MPH 5400 FT 8:1 / 12% 0.00" / 0.0" 0.00" / 0.0" 9 08 PM Wed Feb 19 2025 23F 20F / 83% W 20 G 30 MPH 5500 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 10 09 PM Wed Feb 19 2025 23F 20F / 75% W 19 G 26 MPH 5600 FT 11:1 / 9% 0.00" / 0.0" 0.00" / 0.0" 11 10 PM Wed Feb 19 2025 22F 18F / 81% WSW 19 G 29 MPH 5800 FT 12:1 / 8% 0.00" / 0.0" 0.00" / 0.0" 12 11 PM Wed Feb 19 2025 21F 18F / 92% WSW 16 G 28 MPH 5600 FT 10:1 / 10% 0.02" / 0.2" 0.02" / 0.2" 13 12 AM Thu Feb 20 2025 22F 18F / 94% SW 19 G 36 MPH 5500 FT 9:1 / 11% 0.07" / 0.6" 0.09" / 0.8" 14 01 AM Thu Feb 20 2025 24F 18F / 97% WSW 22 G 35 MPH 5300 FT 11:1 / 9% 0.12" / 1.3" 0.21" / 2.1" 15 02 AM Thu Feb 20 2025 24F 18F / 99% WSW 20 G 32 MPH 5400 FT 11:1 / 9% 0.02" / 0.2" 0.23" / 2.3" 16 03 AM Thu Feb 20 2025 23F 17F / 92% W 21 G 34 MPH 6200 FT 11:1 / 9% 0.05" / 0.6" 0.28" / 2.9" 17 04 AM Thu Feb 20 2025 21F 15F / 97% W 18 G 30 MPH 5800 FT 12:1 / 8% 0.00" / 0.0" 0.28" / 2.9" 18 05 AM Thu Feb 20 2025 20F 14F / 92% W 18 G 28 MPH 6000 FT 12:1 / 8% 0.00" / 0.0" 0.28" / 2.9" 19 06 AM Thu Feb 20 2025 20F 14F / 95% W 17 G 26 MPH 5900 FT 12:1 / 8% 0.00" / 0.0" 0.28" / 2.9" 20 07 AM Thu Feb 20 2025 19F 13F / 97% W 17 G 25 MPH 5700 FT 13:1 / 8% 0.00" / 0.0" 0.28" / 2.9" 21 08 AM Thu Feb 20 2025 19F 13F / 95% WNW 19 G 27 MPH 5400 FT 13:1 / 8% 0.00" / 0.0" 0.28" / 2.9" 22 09 AM Thu Feb 20 2025 19F 13F / 95% WNW 19 G 29 MPH 5300 FT 13:1 / 8% 0.01" / 0.1" 0.29" / 3.0" 23 10 AM Thu Feb 20 2025 20F 14F / 94% WNW 17 G 27 MPH 5000 FT 14:1 / 7% 0.02" / 0.3" 0.31" / 3.3" 24 11 AM Thu Feb 20 2025 21F 15F / 93% WNW 17 G 26 MPH 4900 FT 15:1 / 7% 0.01" / 0.2" 0.32" / 3.5" 25 12 PM Thu Feb 20 2025 21F 15F / 93% WNW 17 G 27 MPH 5000 FT 15:1 / 7% 0.01" / 0.2" 0.33" / 3.7" 26 01 PM Thu Feb 20 2025 21F 15F / 97% WNW 16 G 26 MPH 5200 FT 16:1 / 6% 0.02" / 0.3" 0.35" / 4.0" 27 02 PM Thu Feb 20 2025 22F 15F / 97% WNW 18 G 27 MPH 5100 FT 15:1 / 7% 0.00" / 0.0" 0.35" / 4.0" 28 03 PM Thu Feb 20 2025 21F 14F / 94% WNW 19 G 28 MPH 5000 FT 15:1 / 7% 0.00" / 0.0" 0.35" / 4.0" 29 04 PM Thu Feb 20 2025 19F 13F / 94% WNW 19 G 30 MPH 5200 FT 14:1 / 7% 0.00" / 0.0" 0.35" / 4.0" 30 05 PM Thu Feb 20 2025 18F 12F / 91% NW 23 G 34 MPH 5100 FT 16:1 / 6% 0.00" / 0.0" 0.35" / 4.0" 31 06 PM Thu Feb 20 2025 17F 11F / 94% NW 22 G 34 MPH 5200 FT 14:1 / 7% 0.01" / 0.1" 0.36" / 4.1" 32 07 PM Thu Feb 20 2025 16F 10F / 94% NW 23 G 33 MPH 4900 FT 13:1 / 8% 0.02" / 0.3" 0.38" / 4.4" 33 08 PM Thu Feb 20 2025 15F 10F / 96% NW 18 G 29 MPH 4900 FT 16:1 / 6% 0.02" / 0.3" 0.40" / 4.7" 34 09 PM Thu Feb 20 2025 15F 10F / 97% NNW 17 G 28 MPH 4900 FT 15:1 / 7% 0.01" / 0.2" 0.41" / 4.9" 35 10 PM Thu Feb 20 2025 16F 11F / 94% NNW 17 G 26 MPH 4800 FT 15:1 / 7% 0.00" / 0.0" 0.41" / 4.9" 36 11 PM Thu Feb 20 2025 16F 11F / 91% NNW 15 G 25 MPH 4700 FT 15:1 / 7% 0.00" / 0.0" 0.41" / 4.9" 37 12 AM Fri Feb 21 2025 16F 12F / 95% NNW 16 G 26 MPH 4700 FT 15:1 / 7% 0.01" / 0.2" 0.42" / 5.1" 38 01 AM Fri Feb 21 2025 16F 12F / 95% NNW 16 G 25 MPH 4700 FT 14:1 / 7% 0.02" / 0.3" 0.44" / 5.4" 39 02 AM Fri Feb 21 2025 16F 12F / 95% NNW 16 G 25 MPH 4700 FT 15:1 / 7% 0.00" / 0.0" 0.44" / 5.4" 40 03 AM Fri Feb 21 2025 16F 13F / 92% NNW 15 G 22 MPH 4700 FT 16:1 / 6% 0.00" / 0.0" 0.44" / 5.4" 41 04 AM Fri Feb 21 2025 16F 12F / 95% NNW 15 G 20 MPH 4600 FT 16:1 / 6% 0.01" / 0.2" 0.45" / 5.6" 42 05 AM Fri Feb 21 2025 16F 13F / 95% NNW 16 G 24 MPH 4500 FT 16:1 / 6% 0.00" / 0.0" 0.45" / 5.6" 43 06 AM Fri Feb 21 2025 16F 13F / 88% NNW 15 G 22 MPH 4400 FT 13:1 / 8% 0.00" / 0.0" 0.45" / 5.6" 44 07 AM Fri Feb 21 2025 17F 13F / 88% N 12 G 21 MPH ≤ KSLC 15:1 / 7% 0.00" / 0.0" 0.45" / 5.6" 45 08 AM Fri Feb 21 2025 16F 14F / 83% NNE 13 G 20 MPH ≤ KSLC 13:1 / 8% 0.00" / 0.0" 0.45" / 5.6" 46 09 AM Fri Feb 21 2025 18F 16F / 79% NNE 13 G 20 MPH 4300 FT 11:1 / 9% 0.00" / 0.0" 0.45" / 5.6" 47 10 AM Fri Feb 21 2025 20F 17F / 77% NNE 11 G 20 MPH 4600 FT 13:1 / 8% 0.00" / 0.0" 0.45" / 5.6" 48 11 AM Fri Feb 21 2025 23F 18F / 79% NNE 8 G 16 MPH 4900 FT 12:1 / 8% 0.00" / 0.0" 0.45" / 5.6"