December has begun with afternoon temperatures ( at Grand Junction ) 10-15 degrees warmer than the seasonal average.
The Western Slope has been mostly clear, mild and dry under a ridge of high pressure. The continuation of afternoon record warm temperatures ( at various sites across Eastern UT and Western CO ) will continue through Thursday. This pattern will not budge much through the upcoming weekend. The temperatures may stumble a bit, but still remain warmer than they should for this time of the year.
Several weak systems will continue to pass the state by in the northern latitudes. Eventually this will break down the current weather maker and allow unsettled conditions/storminess into the forecast next week. By way of a cold front as a lifting mechanism for storms and with the help of several cut off low pressure systems in Southern California. The timing will dictate snow or no snow for the lower valley elevations. Most of the mountains will be getting snow next week and for now, the lower valleys are looking at rain to start Tuesday. Stay tuned for changes, but the mountains could get a Winter Weather Advisory Monday through Wednesday followed by another round of snow for the end of next week. Valley locations will be looking to cash in on rain deficits for the start of next week with the possibility of light snow following the midweek period.
It’s time to look for a comet! You will need a good set of binoculars or you can use your existing telescope set up. Comet Leonard is inbound and you can’t see it with the naked eye. Leonard was discovered in January of 2021. This comet, which is travelling almost 160,000 mph toward the sun, will be visible for the next week during pre-dawn hours in the eastern sky ( about 90 mins before sunrise GJ @ 7:16 ). Point your telescope between the Big Dipper and the Moon. Later this month the comet can be seen 30 minutes after sunset, low in the southwest sky beneath Saturn and Venus.