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 13-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 13 2025 26F 17F / 100% S 27 G 56 MPH 7200 FT 9:1 / 11% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Thu Mar 13 2025 26F 18F / 100% S 26 G 56 MPH 7200 FT 10:1 / 10% 0.01" / 0.1" 0.01" / 0.1" 2 08 AM Thu Mar 13 2025 25F 18F / 100% SSW 22 G 46 MPH 7200 FT 10:1 / 10% 0.00" / 0.0" 0.01" / 0.1" 3 09 AM Thu Mar 13 2025 25F 18F / 100% S 23 G 48 MPH 7300 FT 10:1 / 10% 0.00" / 0.0" 0.01" / 0.1" 4 10 AM Thu Mar 13 2025 26F 18F / 100% S 21 G 46 MPH 7200 FT 10:1 / 10% 0.00" / 0.0" 0.01" / 0.1" 5 11 AM Thu Mar 13 2025 27F 18F / 96% S 21 G 45 MPH 7300 FT 11:1 / 9% 0.03" / 0.3" 0.04" / 0.4" 6 12 PM Thu Mar 13 2025 28F 18F / 94% S 20 G 46 MPH 7300 FT 11:1 / 9% 0.02" / 0.2" 0.06" / 0.6" 7 01 PM Thu Mar 13 2025 29F 20F / 90% SSE 16 G 40 MPH 7300 FT 11:1 / 9% 0.00" / 0.0" 0.06" / 0.6" 8 02 PM Thu Mar 13 2025 29F 20F / 97% SSE 13 G 36 MPH 7400 FT 11:1 / 9% 0.02" / 0.2" 0.08" / 0.8" 9 03 PM Thu Mar 13 2025 27F 19F / 92% S 18 G 43 MPH 7500 FT 11:1 / 9% 0.07" / 0.8" 0.15" / 1.6" 10 04 PM Thu Mar 13 2025 28F 19F / 90% S 16 G 38 MPH 7300 FT 10:1 / 10% 0.08" / 0.8" 0.23" / 2.4" 11 05 PM Thu Mar 13 2025 28F 19F / 89% S 15 G 33 MPH 7500 FT 10:1 / 10% 0.03" / 0.3" 0.26" / 2.7" 12 06 PM Thu Mar 13 2025 28F 19F / 91% S 19 G 43 MPH 7500 FT 10:1 / 10% 0.18" / 1.8" 0.44" / 4.5" 13 07 PM Thu Mar 13 2025 27F 18F / 97% SSW 17 G 32 MPH 6100 FT 13:1 / 8% 0.03" / 0.4" 0.47" / 4.9" 14 08 PM Thu Mar 13 2025 24F 16F / 96% WSW 19 G 34 MPH 5700 FT 10:1 / 10% 0.17" / 1.7" 0.64" / 6.6" 15 09 PM Thu Mar 13 2025 21F 14F / 97% WSW 15 G 28 MPH 5500 FT 12:1 / 8% 0.18" / 2.2" 0.82" / 8.8" 16 10 PM Thu Mar 13 2025 20F 12F / 94% WSW 15 G 29 MPH 5200 FT 12:1 / 8% 0.07" / 0.8" 0.89" / 9.6" 17 11 PM Thu Mar 13 2025 19F 12F / 100% W 13 G 22 MPH 4800 FT 14:1 / 7% 0.05" / 0.7" 0.94" / 10.3" 18 12 AM Fri Mar 14 2025 17F 10F / 97% WNW 14 G 22 MPH 4700 FT 17:1 / 6% 0.07" / 1.2" 1.01" / 11.5" 19 01 AM Fri Mar 14 2025 16F 8F / 100% WNW 18 G 28 MPH 4500 FT 16:1 / 6% 0.06" / 1.0" 1.07" / 12.5" 20 02 AM Fri Mar 14 2025 15F 7F / 98% WNW 19 G 33 MPH 4700 FT 17:1 / 6% 0.07" / 1.2" 1.14" / 13.7" 21 03 AM Fri Mar 14 2025 15F 6F / 97% WNW 23 G 35 MPH ≤ KSLC 16:1 / 6% 0.09" / 1.4" 1.23" / 15.1" 22 04 AM Fri Mar 14 2025 12F 4F / 99% WNW 26 G 38 MPH 4300 FT 17:1 / 6% 0.04" / 0.7" 1.27" / 15.8" 23 05 AM Fri Mar 14 2025 13F 6F / 94% WNW 22 G 33 MPH 4400 FT 18:1 / 6% 0.02" / 0.4" 1.29" / 16.2" 24 06 AM Fri Mar 14 2025 12F 5F / 86% WNW 23 G 34 MPH 4300 FT 16:1 / 6% 0.00" / 0.0" 1.29" / 16.2" 25 07 AM Fri Mar 14 2025 13F 6F / 86% WNW 22 G 35 MPH 4500 FT 15:1 / 7% 0.00" / 0.0" 1.29" / 16.2" 26 08 AM Fri Mar 14 2025 12F 6F / 91% WNW 19 G 29 MPH 4300 FT 18:1 / 6% 0.04" / 0.7" 1.33" / 16.9" 27 09 AM Fri Mar 14 2025 11F 4F / 84% WNW 21 G 30 MPH ≤ KSLC 17:1 / 6% 0.16" / 2.7" 1.49" / 19.6" 28 10 AM Fri Mar 14 2025 11F 4F / 82% WNW 17 G 28 MPH ≤ KSLC 21:1 / 5% 0.01" / 0.2" 1.50" / 19.8" 29 11 AM Fri Mar 14 2025 12F 4F / 82% WNW 18 G 28 MPH ≤ KSLC 20:1 / 5% 0.00" / 0.0" 1.50" / 19.8" 30 12 PM Fri Mar 14 2025 14F 4F / 83% W 18 G 27 MPH ≤ KSLC 23:1 / 4% 0.00" / 0.0" 1.50" / 19.8" 31 01 PM Fri Mar 14 2025 16F 7F / 88% W 17 G 26 MPH ≤ KSLC 21:1 / 5% 0.00" / 0.0" 1.50" / 19.8" 32 02 PM Fri Mar 14 2025 18F 9F / 100% W 14 G 23 MPH ≤ KSLC 20:1 / 5% 0.01" / 0.2" 1.51" / 20.0" 33 03 PM Fri Mar 14 2025 18F 9F / 94% W 15 G 25 MPH ≤ KSLC 22:1 / 5% 0.01" / 0.2" 1.52" / 20.2" 34 04 PM Fri Mar 14 2025 19F 8F / 95% WSW 16 G 26 MPH 4300 FT 21:1 / 5% 0.01" / 0.2" 1.53" / 20.4" 35 05 PM Fri Mar 14 2025 18F 8F / 98% WSW 17 G 29 MPH 4300 FT 20:1 / 5% 0.01" / 0.2" 1.54" / 20.6" 36 06 PM Fri Mar 14 2025 16F 7F / 98% WSW 17 G 27 MPH 4300 FT 19:1 / 5% 0.00" / 0.0" 1.54" / 20.6" 37 07 PM Fri Mar 14 2025 16F 8F / 95% WSW 13 G 23 MPH 4400 FT 21:1 / 5% 0.01" / 0.2" 1.55" / 20.8" 38 08 PM Fri Mar 14 2025 14F 7F / 92% WSW 14 G 25 MPH 4300 FT 18:1 / 6% 0.01" / 0.2" 1.56" / 21.0" 39 09 PM Fri Mar 14 2025 13F 7F / 91% WSW 17 G 28 MPH ≤ KSLC 18:1 / 6% 0.00" / 0.0" 1.56" / 21.0" 40 10 PM Fri Mar 14 2025 12F 6F / 94% WSW 17 G 29 MPH ≤ KSLC 16:1 / 6% 0.00" / 0.0" 1.56" / 21.0" 41 11 PM Fri Mar 14 2025 11F 6F / 91% W 17 G 26 MPH ≤ KSLC 17:1 / 6% 0.00" / 0.0" 1.56" / 21.0" 42 12 AM Sat Mar 15 2025 11F 6F / 94% W 17 G 25 MPH ≤ KSLC 19:1 / 5% 0.00" / 0.0" 1.56" / 21.0" 43 01 AM Sat Mar 15 2025 12F 7F / 96% W 17 G 24 MPH 4400 FT 20:1 / 5% 0.01" / 0.2" 1.57" / 21.2" 44 02 AM Sat Mar 15 2025 13F 8F / 90% WNW 21 G 31 MPH 4400 FT 17:1 / 6% 0.01" / 0.2" 1.58" / 21.4" 45 03 AM Sat Mar 15 2025 14F 8F / 91% WNW 20 G 29 MPH 4400 FT 17:1 / 6% 0.02" / 0.3" 1.60" / 21.7" 46 04 AM Sat Mar 15 2025 13F 8F / 92% WNW 19 G 29 MPH ≤ KSLC 20:1 / 5% 0.03" / 0.6" 1.63" / 22.3" 47 05 AM Sat Mar 15 2025 13F 7F / 89% WNW 20 G 29 MPH ≤ KSLC 16:1 / 6% 0.00" / 0.0" 1.63" / 22.3" 48 06 AM Sat Mar 15 2025 13F 7F / 91% WNW 23 G 34 MPH 4300 FT 16:1 / 6% 0.00" / 0.0" 1.63" / 22.3"