Amazing early winter heat hits US and Canada, breaking records


Extensive and intense heat waves are roasting much of the United States and Canada, breaking daily and monthly temperature records.

Important reason: Winter is the warmest season in the United States, and prolonged warmth shortens the snow season in places like Colorado and Montana where mountain snow is an important source of water during the summer.

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Big picture: On Wednesday, British Columbia Highest temperature ever recorded During December, a maximum temperature of 72.5 ° F was recorded at Pentikton, 250 miles east of Vancouver. This set the record for the country in the month.

With numbers: Temperatures in parts of the Plains, Rocky and Central states are 35 ° F above average during this period.

  • According to meteorological historians, four states, Washington, Montana, Wyoming and North Dakota, set records for the hottest temperatures seen in December. Maximiliano Herrera..

  • In Denver, Colorado, heavy snowfall is common at the beginning and end of winter, but it hasn’t snowed yet. It sets the latest measurable snowfall record. Expected highs on Thursday are in the mid-1970s, about 30 ° F above the average for this period.

  • Records are expected to fall in Denver, Oklahoma City and Kansas City, Missouri on Thursday. Hettinger, North Dakota, just north of the South Dakota border, reached 71 degrees Fahrenheit on Wednesday, setting a monthly record for the state, according to Hettinger.

  • In Cheyenne, Wyoming, temperatures reached 70 degrees Fahrenheit on Thursday, setting a state record for December.According to, monthly records were also set in Nebraska National Meteorological Service..

  • Warmth Powerful atmospheric river event It is devastated by snow in the Pacific Northwest and the Canadian Rockies, contributing to lowland floods.

environment: The closest source of warmth is the vast area of ​​high pressure or heat dome parked across the west, around which a clockwise air flow sends calm air throughout the region.

  • This characteristic of the weather deflected the storm far north and prevented colder air (for example, the record cold currently lurking in Alaska) from spilling south.

  • Long-term trends also support more frequent and intense extreme thermal events. This ongoing event could further strengthen the already biased balance between the 2021 US warm and cold records and possibly exceed the 2: 1 margin to support the warm milestone.

  • If the climate is not warm, the ratio of such records is expected to be about 1: 1 especially over a decade or more, but these figures are also distorted.

What’s next: The National Weather Service’s Climate Prediction Center strongly supports the next two weeks of milder than average conditions in many of the 48 states of the continental United States after a temporary chill this weekend.

  • But beyond that, the pattern of the work can change, thanks to the typhoons that are currently spinning across the Pacific Northwest.

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