A significant heatwave is set to affect the Midwest and East Coast of the United States, potentially becoming the longest such event in decades for some areas, according to the National Weather Service. Cities such as Chicago, St. Louis, Indianapolis, and New York City are expected to experience extreme heat, with temperatures reaching up to 105 degrees Fahrenheit and breaking records.
This heatwave, driven by an upper-level ridge over the Ohio Valley, will persist through Friday and possibly beyond. While nighttime temperatures will offer slight relief, reaching the upper 60s and 70s, millions are under heat advisories. Additionally, there are concerns about flash flooding in parts of the Dakotas and Minnesota, as well as potential tropical storms in the Gulf of Mexico.
1. Heatwave Duration and Impact
Expected to be the longest in decades for some areas, affecting major cities from the Midwest to the East Coast with temperatures potentially reaching up to 105 degrees Fahrenheit.
2. Affected Regions
Cities including Chicago, St. Louis, Indianapolis, Detroit, Cleveland, Cincinnati, Pittsburgh, Philadelphia, Boston, New York City, and Albany, NY. Heat advisories and excessive heat watches are in place for 71 million Americans.
3. Weather Conditions
The heatwave is driven by an upper-level ridge over the Ohio Valley, resulting in clear skies, warm stable air, and high temperatures. Nights will have low temperatures in the upper 60s and 70s.
4. Potential Records and Statements
New temperature records are likely in the Ohio Valley, Lower Great Lakes, northern Mid-Atlantic, and Northeast. The Pittsburgh NWS office states it “could be the most impactful heat wave of the 21st century.”
5. Mitigation Measures
Buffalo Public Schools are implementing half days for most of the week to protect students from the heat.
6. Associated Weather Events
Flash flooding risks exist in the Dakotas and Minnesota. Rain is expected in parts of Texas and Louisiana due to Gulf moisture, with possible tropical storm development in the Gulf of Mexico.
