As the Madden Julian oscillation shifts eastward through the longitudes of the Americas, a wetter bias to the Brazil weather pattern unfolds. The recent dry regime shifts wetter for later January and early February while Northeast Argentina is drier and hotter.

In Australia, the 6-10-day forecast indicates high impact weather including another surge of ferocious heat into Southeast Australia where 100F can reach the coast and a northwest coast tropical cyclone. shifting heavy rains well inland.

Regarding snow cover, the U.S. snow cover is below normal as mid-January arrives. However, given the lengthy negative arctic oscillation (-AO) the remainder of January, inevitable is a southward expansion of snow cover. The GFS snow depth forecast indicates Arkansas to the Tennessee Valley is snow covered in 2 weeks.

At midday, the 12Z GFS indicates evolution of a significant REGIONAL STRATOSPHERIC WARMING EVENT across eastern North America occurring mid-to-late 11-15-day period. The warming is likely in response to a moderate to strong eastward shifting convection phase of the Madden Julian oscillation (MJO) across the equatorial Pacific.