GFS-DERIVED GREAT SALT LAKE-EFFECT FORECAST GUIDANCE ************************************************************** * THIS IS AN EXPERIMENTAL, AUTOMATED AND UNOFFICIAL FORECAST * ************************************************************** CREATED/MAINTAINED BY TREVOR ALCOTT AND JIM STEENBURGH BASED PARTLY ON ALCOTT ET AL. (2012, WEATHER AND FORECASTING) Contact: jim.steenburgh@utah.edu 7-DAY MEDIAN GREAT SALT LAKE (SOUTH ARM) TEMPERATURE FROM AVHRR Not available CLIMATOLOGICAL LAKE TEMPERATURE 22.3 C LAKE TEMPERATURE USED IN CALCULATIONS 22.3 C DUE TO CHANGES AT NOAA DATA SOURCE RECENT LAKE TEMPERATURES UNAVAILABLE THIS PRODUCT WILL BE BASED ON CLIMATOLOGY FOR NOW For more on GSL temperatures: http://home.chpc.utah.edu/~u0198116/AVHRR/gsltemp.html 06-13-2026 00Z GFS FORECAST HOURS 0-120 FHR VALID TIME WETBULBZERO T700 LAKE-700 EXCESS RH850-700 WIND700 LAPSE700-500 GSLE PROB (%) AFFECTED AREAS 0 Fri 06 PM 10700 FT 10.1 C 12.2 C 0.0 C 15% WSW 18 KT 7.3 C/KM 0% 1 Fri 07 PM 11100 FT 10.4 C 11.9 C 0.0 C 14% WNW 15 KT 7.3 C/KM 0% 2 Fri 08 PM 11400 FT 10.9 C 11.4 C 0.0 C 14% NW 16 KT 7.4 C/KM 0% 3 Fri 09 PM 11600 FT 11.2 C 11.1 C 0.0 C 14% WNW 17 KT 7.4 C/KM 0% 4 Fri 10 PM 11600 FT 11.1 C 11.2 C 0.0 C 14% WNW 15 KT 7.2 C/KM 0% 5 Fri 11 PM 11600 FT 11.0 C 11.3 C 0.0 C 14% WNW 15 KT 7.2 C/KM 0% 6 Sat 12 AM 11500 FT 10.6 C 11.7 C 0.0 C 15% WNW 13 KT 7.3 C/KM 0% 7 Sat 01 AM 11100 FT 10.2 C 12.1 C 0.0 C 15% WNW 10 KT 7.2 C/KM 0% 8 Sat 02 AM 11100 FT 10.1 C 12.2 C 0.0 C 16% W 10 KT 7.4 C/KM 0% 9 Sat 03 AM 11400 FT 10.1 C 12.2 C 0.0 C 17% W 11 KT 7.4 C/KM 0% 10 Sat 04 AM 11300 FT 9.9 C 12.4 C 0.0 C 17% WNW 14 KT 7.4 C/KM 0% 11 Sat 05 AM 11100 FT 9.5 C 12.8 C 0.0 C 18% WNW 12 KT 7.5 C/KM 0% 12 Sat 06 AM 11000 FT 9.0 C 13.3 C 0.0 C 20% W 11 KT 7.2 C/KM 0% 13 Sat 07 AM 10900 FT 8.8 C 13.5 C 0.0 C 21% W 11 KT 7.0 C/KM 0% 14 Sat 08 AM 10800 FT 8.5 C 13.8 C 0.0 C 22% W 10 KT 6.9 C/KM 0% 15 Sat 09 AM 10800 FT 8.2 C 14.1 C 0.0 C 23% W 11 KT 6.8 C/KM 0% 16 Sat 10 AM 11000 FT 8.3 C 14.0 C 0.0 C 25% W 12 KT 6.9 C/KM 0% 17 Sat 11 AM 11100 FT 8.5 C 13.8 C 0.0 C 25% W 14 KT 7.0 C/KM 0% 18 Sat 12 PM 11100 FT 8.8 C 13.5 C 0.0 C 25% W 14 KT 7.1 C/KM 0% 19 Sat 01 PM 11100 FT 9.1 C 13.2 C 0.0 C 25% W 14 KT 7.2 C/KM 0% 20 Sat 02 PM 11200 FT 9.4 C 12.9 C 0.0 C 24% W 15 KT 7.3 C/KM 0% 21 Sat 03 PM 11200 FT 9.5 C 12.8 C 0.0 C 24% WNW 15 KT 7.3 C/KM 0% 22 Sat 04 PM 11100 FT 9.8 C 12.5 C 0.0 C 24% WNW 14 KT 7.4 C/KM 0% 23 Sat 05 PM 11100 FT 9.7 C 12.6 C 0.0 C 25% WNW 12 KT 7.2 C/KM 0% 24 Sat 06 PM 11000 FT 9.8 C 12.5 C 0.0 C 25% WNW 13 KT 7.2 C/KM 0% 25 Sat 07 PM 11200 FT 10.0 C 12.3 C 0.0 C 25% NW 13 KT 7.3 C/KM 0% 26 Sat 08 PM 11700 FT 10.3 C 12.0 C 0.0 C 25% NW 12 KT 7.6 C/KM 0% 27 Sat 09 PM 11900 FT 9.6 C 12.7 C 0.0 C 25% NNW 11 KT 7.3 C/KM 0% 28 Sat 10 PM 12000 FT 9.3 C 13.0 C 0.0 C 25% W 8 KT 7.1 C/KM 0% 29 Sat 11 PM 12100 FT 9.4 C 12.9 C 0.0 C 25% NNW 7 KT 7.1 C/KM 0% 30 Sun 12 AM 12100 FT 9.6 C 12.7 C 0.0 C 25% NW 7 KT 7.4 C/KM 0% 31 Sun 01 AM 12100 FT 9.2 C 13.1 C 0.0 C 26% NW 7 KT 7.3 C/KM 0% 32 Sun 02 AM 12100 FT 8.9 C 13.4 C 0.0 C 27% NW 7 KT 7.4 C/KM 0% 33 Sun 03 AM 12000 FT 8.8 C 13.5 C 0.0 C 28% NW 8 KT 7.4 C/KM 0% 34 Sun 04 AM 11900 FT 8.6 C 13.7 C 0.0 C 29% NW 8 KT 7.2 C/KM 0% 35 Sun 05 AM 11800 FT 8.9 C 13.4 C 0.0 C 30% WNW 10 KT 7.4 C/KM 0% 36 Sun 06 AM 11800 FT 8.7 C 13.6 C 0.0 C 32% W 11 KT 7.2 C/KM 0% 37 Sun 07 AM 11700 FT 8.7 C 13.6 C 0.0 C 32% W 11 KT 7.2 C/KM 0% 38 Sun 08 AM 11700 FT 8.7 C 13.6 C 0.0 C 33% W 12 KT 7.2 C/KM 0% 39 Sun 09 AM 11500 FT 8.8 C 13.5 C 0.0 C 32% W 14 KT 7.2 C/KM 0% 40 Sun 10 AM 11400 FT 8.5 C 13.8 C 0.0 C 32% W 13 KT 7.1 C/KM 0% 41 Sun 11 AM 11300 FT 8.3 C 14.0 C 0.0 C 32% W 12 KT 7.0 C/KM 0% 42 Sun 12 PM 11300 FT 8.2 C 14.1 C 0.0 C 30% W 12 KT 6.9 C/KM 0% 43 Sun 01 PM 11300 FT 8.5 C 13.8 C 0.0 C 28% W 13 KT 7.0 C/KM 0% 44 Sun 02 PM 11300 FT 8.9 C 13.4 C 0.0 C 28% W 14 KT 7.1 C/KM 0% 45 Sun 03 PM 11200 FT 9.0 C 13.3 C 0.0 C 28% WNW 14 KT 7.1 C/KM 0% 46 Sun 04 PM 10900 FT 9.0 C 13.3 C 0.0 C 26% WNW 13 KT 6.9 C/KM 0% 47 Sun 05 PM 10600 FT 9.2 C 13.1 C 0.0 C 23% WNW 14 KT 6.9 C/KM 0% 48 Sun 06 PM 10800 FT 9.3 C 13.0 C 0.0 C 21% NW 18 KT 6.7 C/KM 0% 49 Sun 07 PM 10900 FT 9.6 C 12.7 C 0.0 C 23% NNW 23 KT 6.7 C/KM 0% 50 Sun 08 PM 11100 FT 9.4 C 12.9 C 0.0 C 24% NNW 18 KT 6.9 C/KM 0% 51 Sun 09 PM 11100 FT 9.2 C 13.1 C 0.0 C 23% WNW 14 KT 6.7 C/KM 0% 52 Sun 10 PM 11000 FT 8.9 C 13.4 C 0.0 C 24% N 10 KT 6.6 C/KM 0% 53 Sun 11 PM 11100 FT 8.6 C 13.7 C 0.0 C 25% NNE 7 KT 6.4 C/KM 0% 54 Mon 12 AM 11200 FT 8.4 C 13.9 C 0.0 C 25% NNE 6 KT 6.5 C/KM 0% 55 Mon 01 AM 11000 FT 8.2 C 14.1 C 0.0 C 25% NNW 8 KT 6.5 C/KM 0% 56 Mon 02 AM 11000 FT 8.2 C 14.1 C 0.0 C 25% NNW 10 KT 6.6 C/KM 0% 57 Mon 03 AM 11100 FT 8.1 C 14.2 C 0.0 C 27% NNW 7 KT 6.6 C/KM 0% 58 Mon 04 AM 11100 FT 8.0 C 14.3 C 0.0 C 28% NNW 8 KT 6.3 C/KM 0% 59 Mon 05 AM 11000 FT 8.1 C 14.2 C 0.0 C 29% NNW 8 KT 6.1 C/KM 0% 60 Mon 06 AM 10800 FT 8.1 C 14.2 C 0.0 C 30% NNW 8 KT 6.0 C/KM 0% 61 Mon 07 AM 10800 FT 7.7 C 14.6 C 0.0 C 31% NNW 6 KT 5.8 C/KM 0% 62 Mon 08 AM 10700 FT 7.6 C 14.7 C 0.0 C 31% NNW 6 KT 5.8 C/KM 0% 63 Mon 09 AM 10500 FT 7.6 C 14.7 C 0.0 C 31% NW 7 KT 5.8 C/KM 0% 64 Mon 10 AM 10300 FT 7.7 C 14.6 C 0.0 C 30% NW 9 KT 5.8 C/KM 0% 65 Mon 11 AM 10300 FT 7.8 C 14.5 C 0.0 C 29% NW 10 KT 5.7 C/KM 0% 66 Mon 12 PM 10300 FT 8.0 C 14.3 C 0.0 C 27% WNW 10 KT 5.8 C/KM 0% 67 Mon 01 PM 10400 FT 8.1 C 14.2 C 0.0 C 25% WNW 9 KT 5.8 C/KM 0% 68 Mon 02 PM 10300 FT 8.5 C 13.8 C 0.0 C 24% WNW 10 KT 5.9 C/KM 0% 69 Mon 03 PM 10500 FT 9.5 C 12.8 C 0.0 C 21% WNW 13 KT 6.3 C/KM 0% 70 Mon 04 PM 10900 FT 9.8 C 12.5 C 0.0 C 21% WNW 16 KT 6.4 C/KM 0% 71 Mon 05 PM 10900 FT 10.3 C 12.0 C 0.0 C 21% WNW 15 KT 6.6 C/KM 0% 72 Mon 06 PM 11400 FT 10.6 C 11.7 C 0.0 C 19% NW 16 KT 6.6 C/KM 0% 73 Mon 07 PM 12100 FT 11.2 C 11.1 C 0.0 C 19% NW 20 KT 6.7 C/KM 0% 74 Mon 08 PM 12200 FT 11.5 C 10.8 C 0.0 C 19% NW 21 KT 6.9 C/KM 0% 75 Mon 09 PM 12100 FT 11.1 C 11.2 C 0.0 C 19% NNW 19 KT 6.8 C/KM 0% 76 Mon 10 PM 12300 FT 11.1 C 11.2 C 0.0 C 19% NNW 18 KT 6.6 C/KM 0% 77 Mon 11 PM 12500 FT 10.9 C 11.4 C 0.0 C 19% NNW 17 KT 6.5 C/KM 0% 78 Tue 12 AM 12700 FT 11.4 C 10.9 C 0.0 C 20% NW 21 KT 6.7 C/KM 0% 79 Tue 01 AM 12600 FT 11.7 C 10.6 C 0.0 C 20% NW 25 KT 6.7 C/KM 0% 80 Tue 02 AM 12300 FT 10.9 C 11.4 C 0.0 C 20% NW 23 KT 6.4 C/KM 0% 81 Tue 03 AM 11900 FT 10.3 C 12.0 C 0.0 C 21% NW 19 KT 6.3 C/KM 0% 82 Tue 04 AM 11700 FT 10.3 C 12.0 C 0.0 C 21% WNW 21 KT 6.1 C/KM 0% 83 Tue 05 AM 11100 FT 10.5 C 11.8 C 0.0 C 21% NW 22 KT 6.2 C/KM 0% 84 Tue 06 AM 11000 FT 10.3 C 12.0 C 0.0 C 23% NW 20 KT 6.0 C/KM 0% 85 Tue 07 AM 11000 FT 10.2 C 12.1 C 0.0 C 24% WNW 17 KT 5.9 C/KM 0% 86 Tue 08 AM 10900 FT 10.0 C 12.3 C 0.0 C 25% NW 13 KT 5.6 C/KM 0% 87 Tue 09 AM 10900 FT 9.7 C 12.6 C 0.0 C 26% WNW 14 KT 5.5 C/KM 0% 88 Tue 10 AM 11000 FT 9.7 C 12.6 C 0.0 C 27% WNW 16 KT 5.4 C/KM 0% 89 Tue 11 AM 11000 FT 9.9 C 12.4 C 0.0 C 26% WNW 20 KT 5.2 C/KM 0% 90 Tue 12 PM 11100 FT 9.9 C 12.4 C 0.0 C 24% W 20 KT 5.2 C/KM 0% 91 Tue 01 PM 11300 FT 10.3 C 12.0 C 0.0 C 22% W 19 KT 5.3 C/KM 0% 92 Tue 02 PM 11500 FT 10.8 C 11.5 C 0.0 C 19% W 20 KT 5.4 C/KM 0% 93 Tue 03 PM 12200 FT 11.7 C 10.6 C 0.0 C 18% WNW 19 KT 5.7 C/KM 0% 94 Tue 04 PM 12600 FT 12.4 C 9.9 C 0.0 C 17% W 18 KT 6.1 C/KM 0% 95 Tue 05 PM 12800 FT 13.2 C 9.1 C 0.0 C 16% W 19 KT 6.4 C/KM 0% 96 Tue 06 PM 13100 FT 14.1 C 8.2 C 0.0 C 16% WNW 21 KT 6.8 C/KM 0% 97 Tue 07 PM 13000 FT 14.7 C 7.6 C 0.0 C 15% WNW 22 KT 6.9 C/KM 0% 98 Tue 08 PM 13300 FT 15.0 C 7.3 C 0.0 C 16% WNW 21 KT 6.9 C/KM 0% 99 Tue 09 PM 13400 FT 15.1 C 7.2 C 0.0 C 17% WNW 24 KT 6.9 C/KM 0% 100 Tue 10 PM 13700 FT 15.0 C 7.3 C 0.0 C 18% WNW 22 KT 6.9 C/KM 0% 101 Tue 11 PM 13600 FT 14.6 C 7.7 C 0.0 C 19% WNW 24 KT 6.9 C/KM 0% 102 Wed 12 AM 13500 FT 14.4 C 7.9 C 0.0 C 19% WNW 26 KT 7.0 C/KM 0% 103 Wed 01 AM 13400 FT 14.0 C 8.3 C 0.0 C 20% WNW 27 KT 6.9 C/KM 0% 104 Wed 02 AM 13000 FT 13.6 C 8.7 C 0.0 C 20% WNW 26 KT 6.7 C/KM 0% 105 Wed 03 AM 12900 FT 13.5 C 8.8 C 0.0 C 20% WNW 25 KT 6.8 C/KM 0% 106 Wed 04 AM 13100 FT 13.4 C 8.9 C 0.0 C 21% WNW 26 KT 6.7 C/KM 0% 107 Wed 05 AM 12800 FT 12.9 C 9.4 C 0.0 C 24% WNW 28 KT 6.5 C/KM 0% 108 Wed 06 AM 12700 FT 12.0 C 10.3 C 0.0 C 28% WNW 29 KT 6.2 C/KM 0% 109 Wed 07 AM 12700 FT 11.6 C 10.7 C 0.0 C 33% WNW 32 KT 6.1 C/KM 0% 110 Wed 08 AM 12500 FT 11.3 C 11.0 C 0.0 C 36% WNW 27 KT 6.2 C/KM 0% 111 Wed 09 AM 12700 FT 11.0 C 11.3 C 0.0 C 39% W 26 KT 6.2 C/KM 0% 112 Wed 10 AM 12100 FT 10.7 C 11.6 C 0.0 C 38% W 22 KT 6.1 C/KM 0% 113 Wed 11 AM 11500 FT 10.6 C 11.7 C 0.0 C 34% WNW 24 KT 6.0 C/KM 0% 114 Wed 12 PM 11200 FT 10.3 C 12.0 C 0.0 C 30% WNW 29 KT 5.7 C/KM 0% 115 Wed 01 PM 11500 FT 10.3 C 12.0 C 0.0 C 25% W 26 KT 5.7 C/KM 0% 116 Wed 02 PM 12100 FT 10.8 C 11.5 C 0.0 C 24% W 27 KT 5.9 C/KM 0% 117 Wed 03 PM 12300 FT 11.5 C 10.8 C 0.0 C 17% W 27 KT 6.1 C/KM 0% 118 Wed 04 PM 12400 FT 12.0 C 10.3 C 0.0 C 13% WNW 24 KT 6.1 C/KM 0% 119 Wed 05 PM 12100 FT 12.5 C 9.8 C 0.0 C 12% WNW 26 KT 6.3 C/KM 0% 120 Wed 06 PM 11700 FT 12.7 C 9.6 C 0.0 C 12% WNW 28 KT 6.4 C/KM 0% FORECAST HOURS 123-180 FHR VALID TIME WETBULBZERO T700 LAKE-700 EXCESS RH850-700 WIND700 LAPSE700-500 GSLE PROB (%) AFFECTED AREAS 123 Wed 09 PM 11200 FT 11.9 C 10.4 C 0.0 C 13% WNW 24 KT 6.2 C/KM 0% 126 Thu 12 AM 10400 FT 11.1 C 11.2 C 0.0 C 13% WNW 27 KT 5.9 C/KM 0% 129 Thu 03 AM 9900 FT 9.4 C 12.9 C 0.0 C 16% NW 11 KT 5.1 C/KM 0% 132 Thu 06 AM 10000 FT 8.7 C 13.6 C 0.0 C 21% WNW 14 KT 5.1 C/KM 0% 135 Thu 09 AM 9800 FT 9.2 C 13.1 C 0.0 C 20% WNW 19 KT 5.4 C/KM 0% 138 Thu 12 PM 10000 FT 9.8 C 12.5 C 0.0 C 15% W 17 KT 5.8 C/KM 0% 141 Thu 03 PM 10200 FT 11.6 C 10.7 C 0.0 C 13% WNW 14 KT 6.6 C/KM 0% 144 Thu 06 PM 10700 FT 13.2 C 9.1 C 0.0 C 11% W 11 KT 7.2 C/KM 0% 147 Thu 09 PM 11400 FT 14.2 C 8.1 C 0.0 C 12% NNW 12 KT 7.5 C/KM 0% 150 Fri 12 AM 11700 FT 14.6 C 7.7 C 0.0 C 12% NNW 11 KT 8.0 C/KM 0% 153 Fri 03 AM 12200 FT 14.0 C 8.3 C 0.0 C 12% WNW 8 KT 8.1 C/KM 0% 156 Fri 06 AM 12400 FT 14.0 C 8.3 C 0.0 C 13% WNW 9 KT 8.3 C/KM 0% 159 Fri 09 AM 13500 FT 13.9 C 8.4 C 0.0 C 12% SSW 7 KT 8.9 C/KM 0% 162 Fri 12 PM 12400 FT 13.5 C 8.8 C 0.0 C 14% SSW 10 KT 9.0 C/KM 0% 165 Fri 03 PM 12600 FT 15.3 C 7.0 C 0.0 C 11% SSW 15 KT 9.7 C/KM 0% 168 Fri 06 PM 12300 FT 16.5 C 5.8 C 0.0 C 7% SSW 16 KT 9.8 C/KM 0% 171 Fri 09 PM 12100 FT 16.7 C 5.6 C 0.0 C 6% SW 22 KT 9.8 C/KM 0% 174 Sat 12 AM 11600 FT 15.5 C 6.8 C 0.0 C 6% SW 29 KT 9.4 C/KM 0% 177 Sat 03 AM 11100 FT 14.1 C 8.2 C 0.0 C 6% WSW 23 KT 9.1 C/KM 0% 180 Sat 06 AM 11300 FT 11.9 C 10.4 C 0.0 C 16% SSW 9 KT 7.9 C/KM 0%