Intensifying Heat Dome Poses Record-Breaking Temperatures for the South and Southeast

This weekend, a powerful heat dome is predicted to envelop large sections of the South and Southeast. Temperatures are expected to rise into the upper 90s and even reach triple digits. Numerous daily temperature records might be at risk. According to the National Weather Service (NWS) Weather Prediction Center, many cities could potentially challenge or match their daily high-temperature records.

The developing heat wave has already prompted extensive Extreme Heat Warnings and Heat Advisories across the central, southern, and eastern United States. Forecasters caution that hazardous heat index values and minimal overnight cooling could pose serious health risks. While above-normal temperatures will affect a wide region, records most at risk of being broken this weekend are concentrated in the Southeast and Gulf Coast states. Intense heat combined with tropical humidity could push temperatures and heat indexes to levels more typical of the summer’s peak days.

A heatwave has begun to settle in from the central/southern Plains east through the Southeast as an upper-high strengthens overhead.

The NWS stated that forecast highs will range from the upper 90s to low 100s with high humidity, resulting in heat indices between 105 and 115 degrees. In many areas, these could be the hottest temperatures recorded this year or even in the past few years.

This weekend, at least nine high maximum temperatures are expected to be surpassed, with several others under threat. A record high maximum temperature marks the highest air temperature recorded at a location on a specific date. Forecasters indicate that several long-standing records could be matched or exceeded.

Additionally, numerous record high minimum temperatures might be broken. These denote the warmest overnight low temperature recorded for a particular date at a location.

Friday Temperature Records at Risk

Forecasters suggest that several climate stations across the Southeast and Florida might challenge or exceed daily record highs on Friday. For example, Fayetteville, North Carolina, might reach 101 degrees, surpassing the 100-degree record set in 1918. In Myrtle Beach, South Carolina, temperatures could climb to 94 degrees, exceeding the 93-degree record from 1997.

Other locations at risk include Charlotte, North Carolina (98 degrees forecast, tying the 1925 record), Gainesville, Florida (96 degrees vs. a 97-degree record from 2023), Orlando, Florida (97 degrees vs. a 98-degree record from 2007), and Tallahassee, Florida (99 degrees vs. a 100-degree record set in 2023).

With temperatures closely nearing existing records in some cities, even slight weather changes could dictate whether daily records are matched or broken.

Saturday Temperature Records at Risk

The heat is forecasted to expand on Saturday, threatening record highs from the Southern Plains to the Southeast. Charleston, South Carolina, might reach 98 degrees, potentially surpassing its 2023 record of 96 degrees. Savannah, Georgia, could tie its 100-degree record established in 1918.

Elsewhere, Borger, Texas, might hit 102 degrees, surpassing the 101-degree record set last year. Other stations with record challenges include Gulfport, Mississippi (98 degrees vs. a 99-degree record), Little Rock, Arkansas (103 degrees vs. a 104-degree record), and Bryson City, North Carolina, which might exceed its previous daily record by one degree.

Sunday Temperature Records at Risk

The dangerous heat should persist into Sunday, with several Gulf Coast and Lower Mississippi Valley locations forecasted to reach or match daily records. Baton Rouge and New Orleans, Louisiana, are both expected to hit temperatures matching their daily records of 99 and 98 degrees, respectively.

Other records at risk include Greenville and Greenwood, Mississippi, with forecast highs of 103 degrees tying existing records. Hattiesburg, Mississippi, might come within a degree of the 1951 record. Across Florida, Lakeland and Winter Haven are also near record territory as the prolonged heat event continues.

Extreme Heat: How to Stay Safe

Health officials advise limiting strenuous outdoor activity during peak heat hours, staying indoors in air-conditioned spaces, and drinking plenty of water, even when not thirsty. Wearing lightweight, light-colored clothing, checking on older adults, young children, and neighbors vulnerable to heat-related illness is crucial. Never leave people or pets in parked vehicles. With some areas expecting warm overnight temperatures, residents should find cooling centers or other air-conditioned places if homes don’t cool down at night.