Heat dome pushes record temperatures across U.S. from West to Southeast
A high-pressure system is driving extreme heat from the western United States toward the Midwest, Northeast and Southeast, with record highs already set in Salt Lake City and Billings.
A broad heat dome that produced record temperatures in the western United States over the weekend is moving eastward, bringing forecast highs of 95-105°F to parts of the Upper Midwest on Monday, according to Weather Prediction Center meteorologist Marc Chenard. He said the ridge will shift toward the Northeast on Tuesday, affect the Mid-Atlantic on Wednesday, and reach the Southeast by Thursday and Friday.
Heat advisories now cover an area from Pennsylvania to Maine, including New York City and Boston, where temperatures are expected to rise into the 90s with heat-index values approaching the low 100s. Chenard noted that daily record highs are possible around Syracuse, N.Y., and Manchester, N.H.
The high-pressure system has trapped hot air over the western and central United States, allowing temperatures to climb day after day. On Sunday, Salt Lake City recorded 109°F and Billings, Mont., reached 111°F, each setting an all-time high.
A slow-moving weather system is expected to bring relief to the Northeast and Great Lakes by mid-week, returning temperatures to more typical levels for the season. However, the heat will later shift into the Southeast, with the Carolinas, Florida, Kentucky, Tennessee, Mississippi, Alabama and Georgia forecast to see lows in the low-to-mid 90s through the weekend.