When we get to spring, the polar vortex's days are numbered. When will the "final stratospheric warming" occur this year?
How warm winters and low ice may impact the Great Lakes
March 18, 2024
The latest forecast says a major disruption of the polar vortex is on its way, but the stratosphere has been acting up for a while. Our bloggers explain what it might mean for U.S. weather.
Out of the 29 Northern Hemisphere summers that led up to a winter El Niño, how many were hot versus cold? Wet versus dry? These maps are a global climate scorecard for the influence of El Niño on June-August climate.
What are the odds? This post explains whether your corner of the U.S. is facing elevated odds of an unusually wet, dry, warm, or cool June.
The January 2023 climate outlook favors a wetter-than-average start to the new year for the western US, northern Plains, Great Lakes and Tennessee Valley, and a warmer-than-average month for the central and eastern United States.
Snow-cover duration continued a longer-term pattern in 2021–22, of significantly faster springtime snowmelt.
Ship traffic is increasing as sea ice dwindles—not just in near-shore, territorial waters of Arctic coastal countries, but increasingly, in the high seas of the Central Arctic Ocean.
The 2022 melt season on the Greenland Ice Sheet started slowly, but ended late, with multiple melt spikes in September.