Summer sizzle: NYC, Boston among cities eyeing record highs this week
Intense heat is set to surge into the Northeast late this week, with temperatures climbing high enough in some areas to challenge daily records, according to AccuWeather meteorologists.
The brief burst of heat will be fueled by a piece of a larger heat dome anchored over the Great Plains, which is expected to break off and push eastward heading into the weekend.
While average temperatures in late July are typically the highest temperatures of the year, driven by intense sunshine, warmer Atlantic and lake waters and long days-this upcoming event may push the upper bounds of historical norms.
But, even with routine temperatures typically very high this time of the year, some locations may set daily record highs from Friday to Saturday in parts of the Northeast.
Temperatures will begin to climb on Thursday with widespread highs well into the 80s to mid-90s in store for the Northeast.
Friday will bring the crest of the heat in New England and in the zone from upstate and eastern New York to portions of New Jersey and northern and eastern Pennsylvania.
"In Hartford, Connecticut, the current record of 98 set in 2001 on Friday may be topped," AccuWeather Senior Meteorologist Chad Merrill said. "The record of 99 set in 2016 in Newark, New Jersey, is likely to be swapped by a triple-digit reading."
The record high of 97 in 1999 in New York City is projected to be tied on Friday.
Meanwhile, in Boston, the record of 96 set way back in 1882 could be matched or topped on Friday.
"Showers and heavy thunderstorms follow late in the day on Friday and bring a significant cooldown to the upper 70s on Saturday," Merrill said.
"This will be a very similar pattern to last month when Boston hit 102 degrees on June 24 and cooled to the upper 70s for highs two days later," Merrill added.
Lower humidity will accompany the cooler air in New England and the upper part of the mid-Atlantic on Saturday and may push southward a bit more on Sunday along the Atlantic coast for at time.
The temperature boundary will be a focusing point for at least spotty thunderstorm activity this weekend. The storms will extend from parts of the Ohio Valley and Great Lakes states to the mid-Atlantic coast.
With more cloud cover around and the likelihood of some local cooling breezes from thunderstorm activity, temperatures may inch downward just a bit over the mid-Atlantic during the weekend but far from the extent enjoyed by millions from this past Monday to Tuesday.
Highs in Washington, D.C., will trend downward from near the century mark on Friday to the mid-90s on Saturday and the low 90s on Sunday to put the mid-Atlantic region's cooling trend in perspective.
The cooling trend in the mid-Atlantic will likely briefly reverse early next week with highs well into the 90s from Monday to Tuesday.
"Much more sweeping changes will come through the Northeast from Tuesday to Wednesday, depending on location," Merrill said. "A touch of autumn is expected for a few days during the middle to latter part of next week with lower-than-historical average highs that will linger into the first few days in August."
The transition could be marked by drenching downpours and gusty thunderstorms. Those with travel plans are encouraged to keep abreast of the forecast for timing and locations of the most severe activity that could lead to disruptions.
"In the wake of the storms next week, nighttime temperatures will drop into the 30s and 40s in the Adirondacks and Green and White Mountains with comfortable 60s for much of the Interstate 95 corridor by the end of next week," Merrill said.
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Summer sizzle: NYC, Boston among cities eyeing record highs this week
Summer sizzle: NYC, Boston among cities eyeing record highs this week Intense heat is set to surge into the Northeast late this week, with temperatures climbing high enough in some areas to challenge daily records, according to AccuWeather meteorologists. The brief burst of heat will be fueled by a piece of a larger heat dome anchored over the Great Plains, which is expected to break off and push eastward heading into the weekend. While average temperatures in late July are typically the highest temperatures of the year, driven by intense sunshine, warmer Atlantic and lake waters and long days-this upcoming event may push the upper bounds of historical norms. But, even with routine temperatures typically very high this time of the year, some locations may set daily record highs from Friday to Saturday in parts of the Northeast. Temperatures began to climb on Thursday with widespread highs well into the 80s to mid-90s for the Northeast. Friday will bring the crest of the heat in New England and in the zone from Upstate and eastern New York to portions of New Jersey and northern and eastern Pennsylvania. "In Hartford, Connecticut, the current record of 98 set in 2001 on Friday may be topped," AccuWeather Senior Meteorologist Chad Merrill said. "The record of 99 set in 2016 in Newark, New Jersey, may be swapped by a triple-digit reading." The high temperature in New York City on Friday is projected to approach the record high of 97 from 1999. Meanwhile, in Boston, the high temperature on Friday could come near the record of 96 set way back in 1882, but is forecast to fall a few degrees short with thunderstorms approaching in the late afternoon. "Showers and heavy thunderstorms follow late in the day on Friday and bring a significant cooldown to the upper 70s on Saturday," Merrill said. "This will be a very similar pattern to last month when Boston hit 102 degrees on June 24 and cooled to the upper 70s for highs two days later," Merrill added. Lower humidity will accompany the cooler air in New England and the upper part of the mid-Atlantic on Saturday and may push southward a bit more on Sunday along the Atlantic coast for a time. The temperature boundary will be a focusing point for at least spotty thunderstorm activity this weekend. The storms will extend from parts of the Ohio Valley and Great Lakes states to the mid-Atlantic coast. With more cloud cover around and the likelihood of some local cooling breezes from thunderstorm activity, temperatures may inch downward just a bit over the mid-Atlantic during the weekend but far from the extent enjoyed by millions from this past Monday to Tuesday. Highs in Washington, D.C., will trend downward from near the century mark on Friday to the mid-90s on Saturday and the low 90s on Sunday to put the mid-Atlantic region's cooling trend in perspective. The core of the heat dome will settle southward in the Eastern states over the weekend and will take up residence in the Southeast from Saturday to Wednesday. During this weekend alone, 175 million people will experience RealFeel Temperatures of 100 degrees or higher in the East. The cooling trend in the mid-Atlantic will likely briefly reverse early next week with highs well into the 90s from Monday to the app? Unlock AccuWeather Alerts™ with Premium+ "Much more sweeping changes will come through the Northeast from Tuesday to Wednesday, depending on location, "Merrill said. "A touch of autumn is expected for a few days during the middle to latter part of next week with lower-than-historical average highs that will linger into the first few days in August." The transition could be marked by drenching downpours and gusty thunderstorms. Those with travel plans are encouraged to keep abreast of the forecast for timing and locations of the most severe activity that could lead to disruptions. "In the wake of the storms next week, nighttime temperatures will drop into the 30s and 40s in the Adirondacks and Green and White Mountains with comfortable 60s for much of the Interstate 95 corridor by the end of next week," Merrill said. Want next-level safety, ad-free? Unlock advanced, hyperlocal severe weather alerts when you subscribe to Premium+ on the AccuWeather app. AccuWeather Alerts™ are prompted by our expert meteorologists who monitor and analyze dangerous weather risks 24/7 to keep you and your family safer. Solve the daily Crossword
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Map shows which states are facing dangerous heat
Multiple states are under extreme heat warnings, advisories or watches on Wednesday, July 23 due to a heat dome that is expected to slowly spread east, according to the National Weather Service. The NWS said the remainder of the week features a "strengthening heat dome over the Mississippi Valley today that gradually builds east towards the East Coast by week's end." The weather service said a combination of mid-upper 90s temperatures and humid conditions are a recipe for "oppressive heat indices that range between 110-115 degrees for many areas along and east of the Mississippi River" on Wednesday. By Thursday, July 24, the NWS says the footprint of heat is expected to move east into the Great Lakes and Northeast regions. "While this is not really a record-breaking air mass in terms of high temperatures, some towns and cities will struggle to drop below 80 degrees at night due to the high humidity levels and retention of heat by vast areas of concrete and pavement," AccuWeather Senior Meteorologist Brett Anderson said Wednesday. "For those that only have a fan or open window to keep cool, sleeping will be difficult for some, with a high risk of dehydration." AccuWeather says temperatures will reach 100 degrees from Texas to western Tennessee "just about every day" for the next week or two. See which areas are facing heat and humidity this week. Heat wave affects nearly 100 million: Heat advisories abound as almost 100 million Americans face 'ridiculous' temps National heat index map: See which states feel hottest The map below identifies areas where the heat index is forecasted to reach NWS-defined levels from "Caution" (80 degrees Fahrenheit) to "Extreme Danger" (above 125 degrees). The heat index measures how hot it actually feels when factoring for humidity. Prolonged exposure to a heat index above 80 degrees can lead to fatigue, as previously reported by USA TODAY. As it gets hotter, the risk continues to increase − potentially resulting in heat stroke or even death. Older adults, children, and outdoor workers are generally at higher risk of heat-related incidents. What is an extreme heat advisory? The weather service issues an Extreme Heat Warning when "extremely dangerous" heat conditions are expected or occurring. People in those areas are urged to avoid outdoor activities, especially during the heat of the day, and to check on family and neighbors. An Extreme Heat Watch is issued when conditions are favorable for an extreme heat event but its occurrence and timing are uncertain. People are warned to suspend all major outdoor activities if a warning is issued. What is a heat dome? Heat dome is not actually a scientific term, according to which says the term does effectively describe the "oppressive" high-pressure atmospheric systems that cause warm air to be pushed to the Earth's surface and trapped there for long periods of time. "The dome traps high-pressure air in one place, like the lid on a pot," the website says. "These large zones of hot air result in a combination of blistering temperatures, devastating wildfires, and drought conditions." Gabe Hauari is a national trending news reporter at USA TODAY. You can follow him on X @GabeHauari or email him at Gdhauari@ This article originally appeared on USA TODAY: Heat index map: See which states will be the hottest today Solve the daily Crossword
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South sweating out the 'ridiculous' heat: See who is next in triple digits
Almost 100 million Americans were under National Weather Service extreme heat warnings, watches or advisories July 23 as a heat dome descended on a swath of the nation and slowly spread toward the East. The high temperature in St. Louis on July 23 was forecast at 98 degrees − and a heat index could reach a stunning 116, the weather service said. The forecast high in Little Rock for July 23-24 was 101 degrees and heat index values could near 110. The heat index measures how hot it actually feels when factoring for humidity. It's summer and it's supposed to be hot. But temperatures will run 5-15 degrees above the historical average, AccuWeather says. The heat dome is "not really a record-breaking air mass" that would shatter records for high temperatures, AccuWeather Senior Meteorologist Brett Anderson said. But low temperatures in many cities and towns "will struggle to drop below 80 degrees at night due to the high humidity levels and retention of heat by vast areas of concrete and pavement," he said. The weather service forecast for Chicago calls for a heat index of 104 on July 23 and 106 on July 24. Parts of Texas, Arkansas and Louisiana will peak at near or above 100 degrees, and much of the South, Midwest and Great Lakes will see the heat index exceed 100. "Just absolutely ridiculous heat index values here of well over 100 degrees, and 110," Weather Channel meteorologist Jim Cantore said. "We have the combination of high temperatures, 90s in most of these cases, even 100 ... with surging moisture, deep moisture and dew points in the 80s. That's not air you can wear anymore, that is air that is going to give you a shower." Developments: ∎ The heat dome on Wednesday covered a wide slice of the nation from Minneapolis to New Orleans and from Kansas City to Cleveland. ∎ Heavy rains and flash flooding are possible across the Missouri River Valley and Upper Midwest and Great Lakes area July 23-24, the weather service said. ∎ Tropical moisture could produce torrential downpours across portions of the Southeast. The heaviest rainfall will likely occur along the central Gulf Coast and across much of Florida through July 24. National heat index map: See which states feel hottest The map below identifies areas where the heat index is forecasted to reach NWS-defined levels from "Caution" (80 degrees Fahrenheit) to "Extreme Danger" (above 125 degrees). Prolonged exposure to a heat index above 80 degrees can lead to fatigue. As it gets hotter, the risk continues to increase − potentially resulting in heatstroke or even death. Older adults, children, and outdoor workers are generally at higher risk of heat-related incidents. Heat map: See which states are facing dangerous heat Heat threatens power supply in China China warned July 23 that power supply disruptions could result as people struggled to keep cool in record heat baking the nation. High temperatures have exceeded 100 degrees almost daily for the last two weeks across much of the sprawling country of 1.4 billion people, also spurring warnings to the elderly to guard against heatstroke. Since mid-March, the number of days when temperatures reached 95 or more is the highest on record, said Jia Xiaolong, deputy director of the National Climate Center. Don't like the heat wave? Head west While most of the nation swelters, much of the West Coast will be unseasonably cool thanks to a "meandering" low pressure system high in the atmosphere off the California coast, the weather service says. Translation: The July 24 forecast high for Chicago is 97, for Los Angeles and Seattle it is 79. This "upper low" in the West will also trigger showers and thunderstorms in parts of northern California − and there is potential for localized flash flooding near wildfire burn scars. Mostly dry conditions are forecast for the Desert Southwest, and don't worry about being unseasonably cool in Phoenix. The high July 24 is forecast at 104. Heat dome could linger for two weeks The heat dome won't dissipate soon. Dangerous heat is expected across parts of the Central and Southeast. through July, the weather service says. High temperatures will reach 100 degrees from Texas to western Tennessee almost every day for a week or two, AccuWeather said. The Northeast was given a couple days reprieve: highs in the 80s and relatively low humidity. But the dome will spread across the region July 25, driving high temperatures deep into the 90s that will feel like more than 100 degrees as the humidity builds there. Heat dome scorching South, moving east: What you can expect Heavy rain but probably not a hurricane The 2025 hurricane season may be kicking into more active gear in the days ahead, and a disturbance near U.S. shores has drawn the attention of the National Hurricane Center. In a July 22 update, the hurricane center flagged a low pressure area off Northeast Florida that showed some chance of developing after it crosses over Florida into the Gulf of America, renamed from the Gulf of Mexico, later in the week. No matter how organized the system becomes, the northern Gulf Coast faces a few more days of heavy rain, forecasters say. "Expect rain and storm chances to increase toward the end of the week as this disturbance moves in, though it's too early to say much with certainty beyond that," the National Weather Service office in Houston posted on its social media. − Dinah Voyles Pulver Forecasters eye system: Another potential storm off Southeast coast What is an extreme heat advisory? The weather service issues an extreme heat warning when "extremely dangerous" heat conditions are expected or occurring. People in those areas are urged to avoid outdoor activities, especially during the heat of the day, and to check on family and neighbors. An extreme heat watch is issued when conditions are favorable for an extreme heat event but its occurrence and timing are uncertain. People are warned to suspend all major outdoor activities if a warning is issued. A heat advisory is issued for dangerous heat conditions that are not expected to reach warning criteria. What is a heat dome? Heat dome is not actually a scientific term, according to which says the term does effectively describe the "oppressive" high-pressure atmospheric systems that cause warm air to be pushed to the Earth's surface and trapped there for long periods of time. "The dome traps high-pressure air in one place, like the lid on a pot," the website says. "These large zones of hot air result in a combination of blistering temperatures, devastating wildfires, and drought conditions." Contributing: Gabe Hauari This article originally appeared on USA TODAY: Heat advisories abound, millions of Americans face 'ridiculous' temps Solve the daily Crossword
