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 12Z 20-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 06 AM Thu Mar 20 2025 20F 16F / 37% SSW 28 G 49 MPH 4400 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Thu Mar 20 2025 19F 17F / 43% SSW 27 G 47 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 2 08 AM Thu Mar 20 2025 19F 17F / 45% SW 29 G 47 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 3 09 AM Thu Mar 20 2025 19F 16F / 49% WSW 27 G 44 MPH 4400 FT 12:1 / 8% 0.00" / 0.0" 0.00" / 0.0" 4 10 AM Thu Mar 20 2025 21F 16F / 58% WSW 24 G 40 MPH 4700 FT 13:1 / 8% 0.00" / 0.0" 0.00" / 0.0" 5 11 AM Thu Mar 20 2025 22F 16F / 63% WSW 20 G 33 MPH 5200 FT 15:1 / 7% 0.00" / 0.0" 0.00" / 0.0" 6 12 PM Thu Mar 20 2025 22F 15F / 71% W 18 G 31 MPH 5100 FT 13:1 / 8% 0.00" / 0.0" 0.00" / 0.0" 7 01 PM Thu Mar 20 2025 23F 15F / 91% W 17 G 31 MPH 5200 FT 16:1 / 6% 0.00" / 0.0" 0.00" / 0.0" 8 02 PM Thu Mar 20 2025 24F 15F / 90% W 19 G 32 MPH 5400 FT 15:1 / 7% 0.00" / 0.0" 0.00" / 0.0" 9 03 PM Thu Mar 20 2025 24F 14F / 96% W 20 G 34 MPH 5500 FT 15:1 / 7% 0.00" / 0.0" 0.00" / 0.0" 10 04 PM Thu Mar 20 2025 22F 14F / 95% W 23 G 35 MPH 5300 FT 16:1 / 6% 0.00" / 0.0" 0.00" / 0.0" 11 05 PM Thu Mar 20 2025 22F 14F / 90% W 23 G 37 MPH 5500 FT 14:1 / 7% 0.00" / 0.0" 0.00" / 0.0" 12 06 PM Thu Mar 20 2025 21F 13F / 90% W 24 G 36 MPH 5300 FT 15:1 / 7% 0.00" / 0.0" 0.00" / 0.0" 13 07 PM Thu Mar 20 2025 19F 12F / 90% W 24 G 37 MPH 5100 FT 14:1 / 7% 0.00" / 0.0" 0.00" / 0.0" 14 08 PM Thu Mar 20 2025 15F 10F / 80% WNW 25 G 39 MPH 4900 FT 19:1 / 5% 0.00" / 0.0" 0.00" / 0.0" 15 09 PM Thu Mar 20 2025 13F 9F / 72% WNW 27 G 39 MPH 5000 FT 18:1 / 6% 0.00" / 0.0" 0.00" / 0.0" 16 10 PM Thu Mar 20 2025 13F 9F / 76% WNW 25 G 37 MPH 4900 FT 16:1 / 6% 0.00" / 0.0" 0.00" / 0.0" 17 11 PM Thu Mar 20 2025 13F 10F / 76% WNW 26 G 37 MPH 4600 FT 15:1 / 7% 0.00" / 0.0" 0.00" / 0.0" 18 12 AM Fri Mar 21 2025 13F 11F / 69% WNW 29 G 41 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 19 01 AM Fri Mar 21 2025 14F 11F / 64% WNW 29 G 43 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 20 02 AM Fri Mar 21 2025 14F 12F / 62% WNW 30 G 44 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 21 03 AM Fri Mar 21 2025 15F 12F / 62% WNW 28 G 43 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 22 04 AM Fri Mar 21 2025 16F 12F / 60% WNW 31 G 46 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.00" / 0.0" 23 05 AM Fri Mar 21 2025 16F 13F / 61% WNW 30 G 46 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 24 06 AM Fri Mar 21 2025 17F 13F / 62% WNW 29 G 44 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.00" / 0.0" 25 07 AM Fri Mar 21 2025 17F 13F / 64% WNW 27 G 40 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.00" / 0.0" 26 08 AM Fri Mar 21 2025 17F 13F / 68% WNW 27 G 38 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.00" / 0.0" 27 09 AM Fri Mar 21 2025 18F 14F / 77% WNW 23 G 34 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.00" / 0.0" 28 10 AM Fri Mar 21 2025 20F 14F / 80% WNW 20 G 30 MPH 4600 FT 13:1 / 8% 0.00" / 0.0" 0.00" / 0.0" 29 11 AM Fri Mar 21 2025 21F 15F / 82% W 17 G 24 MPH 4900 FT 13:1 / 8% 0.00" / 0.0" 0.00" / 0.0" 30 12 PM Fri Mar 21 2025 23F 16F / 83% W 15 G 22 MPH 5000 FT 14:1 / 7% 0.00" / 0.0" 0.00" / 0.0" 31 01 PM Fri Mar 21 2025 25F 17F / 79% WSW 15 G 24 MPH 5300 FT 14:1 / 7% 0.00" / 0.0" 0.00" / 0.0" 32 02 PM Fri Mar 21 2025 27F 18F / 78% WSW 15 G 26 MPH 5600 FT 13:1 / 8% 0.00" / 0.0" 0.00" / 0.0" 33 03 PM Fri Mar 21 2025 27F 19F / 72% WSW 16 G 28 MPH 6000 FT 11:1 / 9% 0.00" / 0.0" 0.00" / 0.0" 34 04 PM Fri Mar 21 2025 26F 19F / 75% WSW 18 G 32 MPH 6300 FT 11:1 / 9% 0.00" / 0.0" 0.00" / 0.0" 35 05 PM Fri Mar 21 2025 26F 19F / 82% WSW 21 G 37 MPH 6200 FT 7:1 / 14% 0.00" / 0.0" 0.00" / 0.0" 36 06 PM Fri Mar 21 2025 25F 19F / 85% WSW 23 G 37 MPH 6400 FT 8:1 / 12% 0.01" / 0.1" 0.01" / 0.1" 37 07 PM Fri Mar 21 2025 25F 20F / 85% WSW 24 G 40 MPH 6600 FT 7:1 / 14% 0.01" / 0.1" 0.02" / 0.2" 38 08 PM Fri Mar 21 2025 23F 19F / 92% WSW 25 G 42 MPH 6800 FT 8:1 / 12% 0.03" / 0.2" 0.05" / 0.4" 39 09 PM Fri Mar 21 2025 24F 20F / 95% W 28 G 45 MPH 6900 FT 8:1 / 12% 0.07" / 0.6" 0.12" / 1.0" 40 10 PM Fri Mar 21 2025 26F 20F / 97% W 28 G 44 MPH 7400 FT 7:1 / 14% 0.05" / 0.4" 0.17" / 1.4" 41 11 PM Fri Mar 21 2025 26F 21F / 97% W 27 G 45 MPH 7600 FT 8:1 / 12% 0.03" / 0.2" 0.20" / 1.6" 42 12 AM Sat Mar 22 2025 26F 21F / 96% W 28 G 45 MPH 7600 FT 8:1 / 12% 0.07" / 0.6" 0.27" / 2.2" 43 01 AM Sat Mar 22 2025 26F 20F / 93% W 26 G 44 MPH 7400 FT 8:1 / 12% 0.06" / 0.5" 0.33" / 2.7" 44 02 AM Sat Mar 22 2025 25F 20F / 95% W 27 G 44 MPH 7200 FT 10:1 / 10% 0.07" / 0.7" 0.40" / 3.4" 45 03 AM Sat Mar 22 2025 25F 19F / 94% W 25 G 40 MPH 7200 FT 10:1 / 10% 0.08" / 0.8" 0.48" / 4.2" 46 04 AM Sat Mar 22 2025 25F 19F / 95% W 26 G 41 MPH 7300 FT 10:1 / 10% 0.07" / 0.7" 0.55" / 4.9" 47 05 AM Sat Mar 22 2025 25F 19F / 94% W 27 G 41 MPH 7300 FT 10:1 / 10% 0.06" / 0.6" 0.61" / 5.5" 48 06 AM Sat Mar 22 2025 24F 18F / 94% W 27 G 43 MPH 7100 FT 10:1 / 10% 0.07" / 0.7" 0.68" / 6.2"