DESERET NEWS SKI SCHOOL STUDENTS SPENT THEIR FIRST LESSON TRYING OUT THEIR SKIS ON GRASS AT SUGARHOUSE PARK SATURDAY. BUT BEFORE LONG THEY'LL BE TESTING THEMSELVES ON REAL SNOW. SALT LAKE VALLEY SHOULD GET ITS FIRST SNOW ON MONDAY, USHERED IN BY RAIN ON SUNDAY, ACCORDING TO WILLIAM J. ALDER, METEOROLOGIST IN CHARGE OF THE NATIONAL WEATHER SERVICE'S SALT LAKE OFFICE. MONDAY'S STORM WILL BE THE BIGGEST AND COLDEST SO FAR THIS FALL. "WE HAVE BROKEN DOWN THIS PATTERN, THIS STRONG HIGH WE HAD IN OCTOBER THAT GAVE US SUCH DRY, WARM WEATHER." ALDER SAID THE STORM COULD DUMP 11/2 TO 2 FEET OF SNOW IN THE MOUNTAINS BETWEEN SUNDAY NIGHT AND TUESDAY. AND IF THIS STORM IS FOLLOWED BY OTHERS, THE SKI RESORTS COULD MEET THEIR GOAL OF OPENING BY THANKSGIVING, HE SAID. COLD TEMPERATURES ACCOMPANYING THE SNOW WILL ALSO MAKE IT EASIER FOR THE RESORTS TO MAKE SNOW. IN THE VALLEY, THE SNOW SHOULD HIT ABOUT MONDAY AFTERNOON. "IT MAY NOT STICK ON THE STREETS, BUT IT SHOULD STICK ON THE LAWNS." MONDAY IS ALSO EXPECTED TO BE THE FIRST DAY THIS FALL THE TEMPERATURE WILL DIP TO 32 DEGREES AT THE SALT LAKE INTERNATIONAL AIRPORT, PREDICTED ALDER. THAT WOULD BE THE LATEST IN THE SEASON THIS HAS EVER OCCURRED. THE RECORD WAS SET ON NOV. 13, 1944. THE AIRPORT AND SALT LAKE BENCHES ARE PROBABLY THE ONLY AREAS ALONG THE WASATCH FRONT THAT HAVEN'T HAD FREEZING TEMPERATURES YET, HE SAID. THAT'S BECAUSE AT NIGHT THEY GET "DRAINAGE" WINDS COMING OUT OF THE CANYONS AND HEADING TOWARD THE GREAT SALT LAKE.