A long cold front moving through the eastern third of the country would be the main weather producer in the country Monday.
This front would produce areas of heavy rain and strong thunderstorms from the Southern Plains through New England. The heaviest of this precipitation would fall in New England and the Mid-Atlantic. The front would move into the Southeast, allowing precipitation to begin in the area in the afternoon.
In the West, a low pressure system would approach the coast and slowly put an end to the heat wave that had been gripping the area for the past few days. Temperatures in the Southwest would continue to rise into the triple digits Monday, but cooler conditions were expected farther to the north.
Tropical Storm Alex would maintain tropical storm strength much of the day as it traveled through the Bay of Campeche. The most recent forecast track continued to take the storm into northeast Mexico after strengthening into a hurricane.
The Southeast would be warm once again with temperatures in the 90s and 100s, while the Northeast would see temperatures in the 80s and 90s. The Southwest would rise into the 90s and 100s, while the Northwest would see temperatures in the 70s, 80s, and 90s.
Temperatures in the Lower 48 states Sunday ranged from a low of 32 degrees at Stanley, Idaho, to a high of 120 degrees at Death Valley, Calif.