Polar Express: Arctic outbreak to invade parts of US
ORLANDO, Fla. โ The northern tier of the country has been in the grasp of Arctic air for the last week. The core of the potentially record-breaking cold air will settle right into the Nationโs heartland over the weekend. The second is the stratospheric polar vortex which forms in the winter and resides over the polar regions way up in the stratosphere. When the stratospheric polar vortex is weak, the tropospheric polar vortex or polar jet stream also tends to weaken, allowing for Arctic air to spill into the Lower-48. (NOAA)The Arctic oscillation tracks the stability of the polar vortex.
2020 shatters record for billion-dollar weather, climate disasters in US
The combination of record-breaking wildfire and hurricane seasons to intense severe weather events led to 22 billion-dollar disasters across the country, the most on record. Map of approximate location of 2020's Billion-Dollar Disasters. A record shattering 22 billion-dollar disasters occurred in 2020. Top 5 billion-dollar disasters of 2020. The average annual billion-dollar disasters from 1980-2020 is 7.