A sprawling heat dome is expected to bring dangerous heat and oppressive humidity to parts of the U.S. next week, raising the risk of hazardous conditions and potential temperature records in several major cities. The heat dome will first develop over the western U.S. before expanding into the north-central and eastern regions, according to AccuWeather and the National Weather Service (NWS).
Immediate Action & Core Facts
The heat dome is forecast to deliver widespread high temperatures between 95-105 degrees over parts of the northern Plains and Upper Midwest from Sunday through Monday. Cities such as Minneapolis, Indianapolis, Chicago, and Omaha have already experienced high temperatures this week, with records potentially being broken or challenged. The heat is expected to extend into the Appalachians and along the Atlantic Seaboard, though the exact reach remains uncertain.
Deeper Dive & Context
Forecast Details
AccuWeather reports that the heat dome will bring "dangerous heat" and "oppressive humidity," with some locations possibly seeing daily records broken. The Climate Prediction Center has also warned of hazardous heat, with highs in the 90s to low 100s and record-breaking highs expected through the weekend.
Regional Impact
The heat dome is expected to impact Michigan from this weekend through next week, with temperatures forecast to top 90 degrees in cities like Ann Arbor, Detroit, and Lansing. The NWS's 6-10 day temperature outlook shows high confidence for above-average temperatures in the state, particularly in the western Upper Peninsula from July 12-13.
Temporary Relief and Future Outlook
AccuWeather forecasters expect the upcoming heat in the East to be relatively short-lived, with a cold front arriving after a day or two of oppressive conditions. However, the heat dome is expected to strengthen again over the Plains later next week, potentially bringing an extended period of 90- to 105-degree temperatures across parts of the Plains and Midwest.
Safety Measures
Authorities are advising residents to take precautions, such as staying hydrated, avoiding prolonged outdoor activities, and checking on vulnerable individuals. The heat dome's impact on agriculture, energy demand, and public health remains a concern.