A rather strung-out omega block pattern will feature an upper low moving into Southern California with another just offshore New England while an upper high meanders over southern central Canada into the northern Plains.
Article continues below
This orientation will act to maintain cooler than normal temperatures over much of the Southwest and Northeast for the next couple of days while much warmer than normal temperatures are favored over the Pacific Northwest into the Plains.
The northeasterly flow out of southeastern Canada will be responsible for bringing in smoky/hazy and poor air quality conditions to parts of the Northeast and Great Lakes this afternoon/evening.
Across parts of the southern High Plains especially New Mexico into the Texas Panhandle, adequate moisture and afternoon instability may yield locally heavy rain where it has been quite wet recently, which could cause some flooding concerns.
WPC has outlined a Slight Risk of excessive rainfall for this region through Wednesday, which includes some burn scar areas.
More isolated to scattered shower and storms are forecast for portions of the Rockies and into the Sierra as well.
The stalled system off New England will bring in bouts of rainfall to parts of the Northeast over the next couple of days as it spins just offshore.
A frontal boundary on its southwest side will be reinforced from the north as cooler air wraps all the way around the system, bringing in drier than normal air as well to areas of the Mid-Atlantic and into the Southeast with dew points into the 40s (OH River Valley) to mid 60s (Southeast away from the coast).
Over the Upper Midwest/Corn Belt, scattered showers and some thunderstorms are possible through Wednesday as well. ■
Predominant upper-level ridging stretching from the Southwest to the southern High Plains will allow for another day of record-breaking heat across parts of Nevada and Arizona today.