News
02/24/2025, 9:32 am EST

Changeable Nino SSTA Due to Madden Julian oscillation; La Nina Weakens Again

During recent weeks, the convection phase of the Madden Julian oscillation (MJO) settled in the eastern equatorial Pacific to the longitudes of the Americas. Consequently, trade winds have eased across the eastern equatorial Pacific Ocean preventing the upwelling of cooler waters to sustain La Nina. The Nino SSTA regions have warmed significantly.
02/23/2025, 2:13 pm EST

Dry This Week in Australia; Tropical Cyclone Threat Queensland Early Next Week

In Australia, the past week was mostly drier and cooler than normal. Re-emerging heat and dryness will affect the entire continent this week. However, during the medium range Eastern Australia turns very wet. Potential for impacts from a tropical cyclone are apparent for early next week while much of the North turns generally eater than normal in the 8-14/11-15-day period.
02/21/2025, 2:59 pm EST

Explaining North America Winter 2024-25 Polar Vortex Events

Climate forcing by colder than normal conditions in the stratosphere during meteorological winter 2024-25 centered on Greenland produced a mostly warmer than normal winter across the northern hemisphere, especially Canada and Eurasia. However, there was a notable exception. Two brief stratospheric warming events took place across Canada, one just after mid-January and another during mid-February. Each event caused a polar vortex episode in North America.