Warmth surges back north on the winds of strong SW flow 20 to 40 mph
WEDNESDAY SET-UP
Upper-level 30,000-ft jet stream flow and low-level/surface temp distribution
Jet stream pattern buckles with deepening trough (low pressure) over the Rockies— strong 170 mph NW Jet over eastern Pacific
Ridging building over the eastern U.S., pushing the Jet stream back to the north across southern Canada
Cold arctic-source air held in position across northern Canada
Warm/mild air surges back north into the southern/ central plains
Chicago positioned in “Transitional air”—trending to mild air just to our W/SW
THREE-DAY TOTALS ENDING MONDAY MORNING
Significant lake-effect snows pummel upstate New York with 3-4 feet of snow
ATMOSPHERIC RIVER TO BRING HEAVY RAINS TO WEST COAST
The week ahead looks to be a wet one for the west coast, as a 170-mph jet stream will bring a stream of rain-producing short-wave impulses into the west coast region in coming days. Heaviest rains (widespread 3 to 7-inch rainfall) look to occur Tuesday and again Friday-Saturday, but substantial rains in the 1 to 3-inch range are also expected Wednesday/Thursday and next Sunday/Monday.
