High-pressure ridges over the oceans drive warm-weather systems over the continents.
Published Jul 12, 2015
Unseasonably warm temperatures broke records across the United States.
Published Mar 21, 2012
In December 2013, the same kink in the jet stream brought frigid cold to the continental U.S. and record heat to Alaska.
Published Dec 14, 2013
It was cold across the eastern part of North America, but the opposite was true in other parts of the world.
Published Dec 6, 2018
If you live in the northern hemisphere, the past few weeks have been strange. In places where it should be seasonably hot, it’s just warm. In places where weather is usually mild in the summer, it has been ridiculously hot.
Published Aug 8, 2014
Weather records fell across the northeastern United States and Canada’s Ontario and Maritime provinces.
Published Nov 16, 2017
Temperatures were well above the norm for the month, setting records and rising well above the long-term trends.
Published Apr 17, 2012
The state jumped from mid-winter right into late spring, setting monthly temperature records in many cities and towns.
Published Apr 9, 2019
The small town of Eagle was hotter on May 23 than it has been on any day in Houston or Dallas this year.
Published May 27, 2015
This color-coded map shows temperature anomalies for the United States, Canada, eastern Siberia, and Greenland for January 9 to 16, 2011.
Published Jan 26, 2011
The bitter cold that gripped the eastern half of the United States has been replaced by record-warmth.
Published Feb 6, 2019
Large waves in the atmosphere mean that a cold snap in one area is often accompanied by unusual warmth in another.
Published Jan 3, 2018
In March 2013, the same meteorological phenomenon brought warm weather to the Arctic and cool air spilling into the North America, Europe, and Asia.
Published Apr 3, 2013
In January 2016, a deep chill descended across eastern Asia, particular Mongolia.
Published Jan 30, 2016
Though the talk in much of the United States was about polar vortices and wicked cold snaps, the wider world was actually warmer than normal.
Published Mar 20, 2014
In the summer of 2016, extreme heat waves gripped Siberia, the Middle East, and North America.
Published Aug 11, 2016
England, Scotland, and Wales all recorded their warmest winter day ever in February 2019.
Published Mar 5, 2019
Fires are raging in eastern Siberia in the midst of an unusually long-lived heat wave.
Published Jun 23, 2020Image of the Day Atmosphere Heat Land Drought Fires Remote Sensing Temperature Extremes
As of early January 2007, the 2006-2007 Northern Hemisphere winter was proving to be a mild one in terms of temperatures.
Published Jan 10, 2007
While North Americans contended with a blast of Arctic air, Europeans found themselves wondering where winter went.
Published Jan 10, 2014
