Highlight: In March, SLOWLY the big chill reverses warmer. Chart of the day: The extremes of February so far. Comment: An intense high-level polar vortex over the North Pole split and descended through the atmosphere to cause some of the coldest air in history into the Midwest earlier this month which has since then spread into the West. The super chill has hovered over expanding western snow cover and established snow cove rin the North-central U.S. Meanwhile to the east very warm weather has occurred especially over the Southeast. From the West U.S. to the Upper Midwest record snowfall has been observed while on average subtropical rains have affected the western Tennessee Valley. Week 2 Ahead: March 3-9, 2019 Comment: The deep cold biased toward the West and North-central U.S. in February shifts east to the Central/Midwest U.S. in early March. Lingering cold over more snow across the Interior West. Storms are mostly offshore in the East. Week 3 Ahead: March 10-16, 2019 Comment: The bold cold pattern remains anchored over the North-central U.S. but is losing intensity. The Southeast rewarms; the West Coast is warm. The Gulf States are stormy with heaviest rain on the Texas Coast. Week 4 Ahead: March 17-23, 2019 Comment: The big chill departs the pattern and Canada plus the East U.S. are somewhat warmer. Subtropical rains continue to affect the Gulf States.