The sun worshipers will be treated to continued warm temperatures through most of Friday, but a storm system will bring much-needed moisture to Utah through the weekend and into early next week.

And for those watching stream runoff, National Weather Service meteorologist William J. Alder had a bit of what might be considered bad news.Warm weather during recent weeks has taken its toll on the snowpack, with a considerable amount of water lost in the mountains, said Alder, who noted that rapid depletion of water at warmer, lower elevations could result in water problems during the summer.

Snowpack locations, elevation and amount of water lost: Trial Lake, 9,960 feet, 1.7 inches of water lost, with 26.1 inches of water left in the snowpack; Monte Cristo, 8,960 feet, 5.4 inches lost; Ben Lomond Peak, 8,000 feet, 4.6 inches lost; Smith and Morehouse, 7,600 feet, 5.7 inches lost; Ben Lomond Trail, 6,000, 9.3 inches lost; Brighton, 8,725, 3.5 inches lost; Payson Ranger Station, 8,050, 5.7 inches lost; Parleys Summit, 7,500, 8.2 inches, with only 4.0 inches of water remaining in the snowpack.

Parleys and Emigration creeks have peaked, and City Creek is close to its runoff peak. Mill Creek and Big and Little Cottonwood creeks should peak during May.

Quite high winds with 45-to-50 mph gusts in portions of western Utah Thursday and Friday will be a signal of a significant change in the weather. Showery and cooler weather, with temperatures in the low 60s and upper 50s will dominate the picture Sunday and Monday, Alder said.

The storm front will move in late Friday or early Saturday. The temperature in Salt Lake City Thursday could reach 85 degrees, which would be a record for the day and the month. It will be near 80 on Friday.

Records set Wednesday across Utah: Richfield had 81 degrees, with the previous record, 80, set April 19, 1980; Kanab had 87 degrees, with the previous high of 85 in 1954; Hanksville, 98, with 88 being the previous high in 1980. The 98-degree reading ties for the hottest April day ever. It was also 98 on April 1, 1985. In Green River the temperature reached 89 degrees Wednesday, with the previous record being 86 on April 19, 1962.