A powerful winter cyclone — the same storm that led to two tornado outbreaks in the United States and disastrous river flooding — has driven the North Pole to the freezing point this week, 50 degrees above average for this time of year.
From Tuesday evening to Wednesday morning, a mind-boggling pressure drop was recorded in Iceland: 54 millibars in just 18 hours. This triples the criteria for “bomb” cyclogenesis, which meteorologists use to describe a rapidly intensifying mid-latitude storm. A “bomb” cyclone is defined as dropping one millibar per hour for 24 hours.
NOAA’s Ocean Prediction Center said the storm’s minimum pressure dropped to 928 millibars around 1 a.m. Eastern time, which likely places it in the top five strongest storms on record in this region.
“According to the center’s records, the all-time strongest storm in this area occurred on Dec. 15, 1986, and that had a minimum central pressure of 900 millibars,” Mashable’s Andrew Freedman reported on Tuesday. “The second-strongest storm occurred in January 1993, with a pressure of 916 millibars.”
As this storm churns north, it’s forcing warm air into the Arctic Circle. Over the North Sea, sustained winds from the south are blasting at 70 mph, and gusting to well above 100 mph, drawing heat from south to north.
Although there are no permanent weather stations at the North Pole (or really anywhere in the Arctic Ocean), we can use weather forecast models, which ingest data from satellites and surrounding surface observations, to estimate conditions at Earth’s most northern location.
SOURCE: Angela Fritz
The Washington Post