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 AT UTAH.EDU AMB: MT BALDY (11066 FT); ALT:TOP COLLINS (10443 FT); IFF: CARDIFF PK (10059) CLN:COLLINS (9662 FT); ATH20:ATWATER (8752 FT); ELBUT:Elberts (7600 FT) WINDS, TEMPERATURES, SNOW-TO-LIQUID RATIO (SLR) AND SNOW WATER CONTENT (H2O) USE HRRR-BASED MACHINE LEARNING HEIGHT OF WET BULB ZERO LEVEL (WBZ) DERIVED FROM HRRR PROFILE OVER KSLC 1H WATER EQUIVALENT PRECIPITATION (1HP) AND TOTAL WATER EQUIVALENT PRECIPITATION (TP) FROM NEAREST HRRR GRIDPOINT TO CLN 1H SNOW (1HS) AND TOTAL SNOW (TS) USE HOURLY SLR APPLIED TO 1HP BASED ON 00Z 24-OCT-2025 INITIALIZED HRRR WINDS (MPH) TEMPERATURES (F) SLR/H2O 1HP/TP (in) 1HS/TS (in) FHR VALID MOUNTAIN TIME AMB ALT IFF AMB ALT CLN ATH20 ELBUT WBZ(ftMSL) CLN CLN CLN 1 07 PM Thu Oct 23 2025 NNW16G25 NNW07G13 N05G12 32F 36F 39F 43F 40F 9400FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 2 08 PM Thu Oct 23 2025 NNW15G22 NNW06G12 N06G11 31F 35F 36F 40F 38F 9100FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 3 09 PM Thu Oct 23 2025 NNW14G20 NNW06G10 N05G10 31F 34F 34F 37F 36F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 4 10 PM Thu Oct 23 2025 NW13G20 NW06G11 N06G11 30F 33F 33F 36F 34F 9100FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 5 11 PM Thu Oct 23 2025 NNW14G19 NNW07G10 N05G11 31F 33F 32F 36F 33F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 6 12 AM Fri Oct 24 2025 NNW14G20 NNW06G11 N06G11 31F 33F 33F 35F 33F 8900FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 7 01 AM Fri Oct 24 2025 NNW14G20 NNW06G10 N06G11 31F 32F 33F 35F 33F 8800FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 8 02 AM Fri Oct 24 2025 NNW13G20 NNW05G09 N06G11 31F 33F 33F 35F 34F 8700FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 9 03 AM Fri Oct 24 2025 NNW13G19 NNW05G09 NNW06G11 32F 33F 34F 35F 34F 8900FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 10 04 AM Fri Oct 24 2025 NNW13G18 NNW05G08 NNW06G09 31F 32F 33F 35F 34F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 11 05 AM Fri Oct 24 2025 NNW13G18 N05G09 NNW07G10 31F 33F 33F 35F 34F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 12 06 AM Fri Oct 24 2025 N13G18 NNE05G09 NNW06G10 32F 33F 33F 36F 35F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 13 07 AM Fri Oct 24 2025 N13G19 N06G09 NNW07G11 32F 33F 33F 36F 34F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 14 08 AM Fri Oct 24 2025 NNW13G18 N06G09 NNW06G10 32F 33F 33F 34F 34F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 15 09 AM Fri Oct 24 2025 N11G17 NNE05G08 N05G09 31F 33F 31F 36F 34F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 16 10 AM Fri Oct 24 2025 NNW11G14 NE04G07 NNW04G07 32F 35F 34F 41F 40F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 17 11 AM Fri Oct 24 2025 NNW10G13 SSW04G05 ESE04G05 34F 36F 39F 48F 43F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 18 12 PM Fri Oct 24 2025 NNW07G09 S03G03 SW02G04 35F 38F 43F 51F 43F 9000FT 9:1/11% 0.00/0.00 0.0/ 0.0 19 01 PM Fri Oct 24 2025 NNW06G09 W02G04 W03G05 37F 40F 45F 51F 44F 9000FT 5:1/20% 0.00/0.00 0.0/ 0.0 20 02 PM Fri Oct 24 2025 WNW04G06 SW02G04 WSW03G06 38F 41F 46F 51F 47F 9000FT 0:1/- 0.00/0.00 0.0/ 0.0 21 03 PM Fri Oct 24 2025 WNW05G08 SW02G04 SW03G04 39F 42F 47F 52F 49F 9100FT 0:1/- 0.00/0.00 0.0/ 0.0 22 04 PM Fri Oct 24 2025 WNW05G06 WSW02G04 SW05G06 39F 43F 49F 53F 49F 9200FT 0:1/- 0.00/0.00 0.0/ 0.0 23 05 PM Fri Oct 24 2025 W04G07 SW02G04 SW06G09 39F 43F 49F 52F 49F 9200FT 0:1/- 0.00/0.00 0.0/ 0.0 24 06 PM Fri Oct 24 2025 WSW06G09 SW03G05 SSW06G09 39F 42F 47F 52F 48F 9400FT 5:1/20% 0.00/0.00 0.0/ 0.0 25 07 PM Fri Oct 24 2025 WSW08G12 SW04G06 SW08G11 37F 40F 42F 45F 43F 9500FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 26 08 PM Fri Oct 24 2025 WSW10G15 SW04G08 SW08G11 37F 38F 38F 40F 40F 9500FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 27 09 PM Fri Oct 24 2025 WSW12G17 SW06G09 SW08G13 35F 37F 36F 39F 37F 9500FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 28 10 PM Fri Oct 24 2025 WSW14G18 WSW06G09 SW09G13 35F 37F 35F 37F 36F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 29 11 PM Fri Oct 24 2025 WSW14G20 WSW06G11 SW09G13 35F 37F 35F 37F 36F 8900FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 30 12 AM Sat Oct 25 2025 WSW15G20 WSW07G10 SW09G14 35F 37F 35F 38F 36F 8800FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 31 01 AM Sat Oct 25 2025 WSW16G22 WSW07G12 SW10G16 36F 37F 37F 38F 36F 8700FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 32 02 AM Sat Oct 25 2025 WSW17G25 WSW07G12 SW09G15 36F 37F 35F 39F 36F 8800FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 33 03 AM Sat Oct 25 2025 WSW16G22 WSW07G14 WSW10G16 36F 37F 36F 38F 37F 8800FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 34 04 AM Sat Oct 25 2025 WSW16G25 WSW08G13 SW10G15 36F 37F 36F 38F 36F 8900FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 35 05 AM Sat Oct 25 2025 SW16G24 SW08G14 SW11G17 36F 37F 36F 40F 35F 8800FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 36 06 AM Sat Oct 25 2025 SW16G25 SW08G14 SW12G18 36F 37F 35F 39F 36F 8700FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 37 07 AM Sat Oct 25 2025 SW17G26 SW08G15 SW12G19 36F 37F 36F 39F 36F 8900FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 38 08 AM Sat Oct 25 2025 SW19G29 SW09G17 SW13G19 35F 37F 35F 38F 37F 8900FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 39 09 AM Sat Oct 25 2025 SW18G31 SW10G18 SW13G19 36F 38F 36F 40F 38F 9000FT 11:1/ 9% 0.00/0.00 0.0/ 0.0 40 10 AM Sat Oct 25 2025 SW20G33 SW11G20 SSW15G23 36F 38F 39F 45F 43F 9100FT 10:1/10% 0.00/0.00 0.0/ 0.0 41 11 AM Sat Oct 25 2025 SSW20G34 SSW11G21 SSW15G24 36F 39F 42F 50F 45F 9200FT 10:1/10% 0.00/0.00 0.0/ 0.0 42 12 PM Sat Oct 25 2025 SSW19G35 SSW11G22 SSW17G26 37F 40F 44F 52F 46F 9300FT 7:1/14% 0.00/0.00 0.0/ 0.0 43 01 PM Sat Oct 25 2025 SSW18G35 SSW12G22 SSW18G28 38F 41F 46F 54F 50F 9500FT 7:1/14% 0.00/0.00 0.0/ 0.0 44 02 PM Sat Oct 25 2025 SSW18G35 SSW12G24 SSW17G28 38F 41F 48F 56F 53F 9400FT 7:1/14% 0.00/0.00 0.0/ 0.0 45 03 PM Sat Oct 25 2025 SSW18G37 SSW12G25 SSW17G30 39F 41F 49F 55F 54F 9500FT 8:1/12% 0.00/0.00 0.0/ 0.0 46 04 PM Sat Oct 25 2025 SSW18G35 SSW13G25 SSW17G30 39F 42F 49F 55F 55F 9700FT 6:1/17% 0.00/0.00 0.0/ 0.0 47 05 PM Sat Oct 25 2025 SSW17G35 SW13G26 SSW17G31 39F 42F 48F 52F 53F 9600FT 6:1/17% 0.00/0.00 0.0/ 0.0 48 06 PM Sat Oct 25 2025 SW21G42 SSW14G28 SSW17G31 38F 42F 47F 51F 52F 9800FT 7:1/14% 0.00/0.00 0.0/ 0.0