There is a storm moving from northern Saskatchewan into Manitoba (see counterclockwise circulation on the Mid-tropospheric water vapor loop from Colorado State satellite slider). Which Will Continue Through Tomorrow (Sun Returns Tomorrow?) Also, there were some flurries which produced another fraction of an inch of snow in Sartell. The main culprit was the lingering low clouds (see white areas on the Shortwave Albedo loop from Colorado State satellite slider) which held temperatures in the middle 20's during the day at best. Temperatures fell back from highs in the 40's Friday to holding in the 20's most of yesterday (see NWS: 72 hours of St. Yesterday actually ended up being one of the colder periods of late. And, that cold shot will be brief.ĭown to Average High Temperatures Yesterday. This week, we are going to tap into the southern edge of this cold air, but only the stuff around Great Slave Lake in Nunavut (where highs were in the teens yesterday). There is finally some real cold in central Alaska and the western Yukon with midday temperatures below zero with frequent minus teens and a few -20s and -30s. Looking at North American temperatures (see 3 PM Sunday NWS WPC North America zoom-in map), sub-zero temperatures can only be found from northern Manitoba into Nunavut. Meanwhile, colder than average air has only come to central and southern Alaska over the past weekend (step through Dec 7-10 on that 850 mb anomaly map). For most of the winter, the coldest of the cold has concentrated in Siberia and Russia (see blue, dark blue, and even magenta areas, colder than average, on the 850 mb Northern Hemisphere temperature anomaly map from Alicia Bentley's real time GFS maps use left arrows to step back in time). You may have heard about the near record cold in central Siberia last week, which you can see by zooming-in (shift +) on the northwestern flank of the National Ocean Prediction Center Pacific Ocean sector loop during Dec 5-7 of last week temperatures often in the -50s with a few -60s and one or two -70's). This has been because there hasn't been any really cold air for most of the fall and early winter over North America. While it hasn't been quite as warm as the first two-thirds of November, we've had as many 50-plus degree highs as teens highs in December. Only the short period after Thanksgiving had highs below 20 degrees and lows in the single digits (see 30-day graph of St. We know that really cold temperatures have been missing for much of November and December so far. Prepared by Bob Weisman, SCSU Meteorologist and Professor Emeritus Brief December-ish Temperatures Through Tomorrow, then Milder Through Weekend
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