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Heat Wave to Last This Week; Near Triple-Digit Highs May Set More Daily Records Monday in the Northeast
Published: July 2, 2018
A heat wave that has seared parts of the Midwest this past weekend will last the next few days, threatening daily record highs in the Great Lakes and Northeast during July's first week.
A strong upper-level ridge of high pressure, or northward bulge in the jet stream, has expanded into much of the eastern United States.
South to southwesterly winds are spreading a hot and humid air mass northward into the East.
Excessive heat warnings and heat advisories have been issued by the National Weather Service in the East, from Maine to North Carolina. This means heat-related illnesses are possible for those spending prolonged time outdoors, as well as those more vulnerable, such as children and the elderly.
Daytime feels-like temperatures may exceed 105 degrees, and overnight lows may not dip below 75 degrees, which will lead to heat stress and illness.
Current Heat Alerts
Keene, New Hampshire, reached 102 degrees Sunday afternoon, breaking the previous daily record high of 100 degrees from 1913. The all-time record high in Keene is 104 degrees, set on July 3, 1911.
Orange, Massachusetts, also reached the century club, Sunday, topping out at 100 degrees.
Burlington, Vermont, tied its daily record high of 96 degrees on Sunday, previously set in 1931. A new daily record high for July 1 was set in Allentown, Pennsylvania, on Sunday, when temperatures soared to 98 degrees.
Heat Wave Forecast
The most anomalously warm temperatures this week will cluster around the Great Lakes, New York state and New England, where daytime highs will be 10 to 20 degrees above average through Thursday.
Highs well into the 90s, possibly flirting with 100 degrees, are expected again Monday in parts of the East from Virginia to Vermont and New Hampshire.
This may threaten some daily record highs in Albany, New York (98 degrees), Burlington, Vermont (96), and Binghamton, New York (92), among some locations.
Albany, New York, has not reached 100 degrees since September 1953.
In general, upper 80s or low 90s highs are expected in the Great Lakes and Northeast through at least the middle of this week.
(MAPS: 10-Day Forecast U.S. Highs/Lows)
Adding to the heat, dew points have risen into the 60s and 70s, which is making it feel hotter than the actual air temperature indicates.
Heat index values will easily climb above 100 degrees in many locations, with values up to 110 degrees in some spots, making prolonged outdoor exposure very dangerous.
Heat Index Forecast
Low temperatures will also be up to 20 degrees warmer than average. This translates to lows only dipping into the 70s, even low 80s in some urban areas, providing little relief from the heat overnight.
Some relief from the widespread heat and humidity may arrive in parts of the Midwest and Northeast late this week and into the weekend. A cold front will sweep through those regions and should drop temperatures closer to early-July averages.
Record Temperatures So Far
Hot conditions spread from the Plains and Rockies into much of the Midwest last Thursday. Denver tied its all-time record high of 105 degrees Thursday afternoon.
Colorado Springs also exceeded 100 degrees, but only broke a daily record-high temperature for June 28.
Daily record-high temperatures were also set last Thursday in Pueblo, Colorado (106 degrees), Scottsbluff, Nebraska (105) and Cheyenne, Wyoming (99).
On Friday, a daily record high was set at Gaylord, Michigan (93 degrees), and Sioux Falls, South Dakota, tied its daily record-warm low temperature of 75 degrees.
The hot temperatures tied daily record highs on Saturday in Alpena, Michigan (99 degrees) and Burlington, Vermont (93). In addition, low temperatures on Saturday were the warmest on record for June in Traverse City, Michigan (82 degrees) and Houghton Lake, Michigan (75).
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