Weekly Weather Watch: Monday, June 23rd, 2025
Extreme heat will persist from the Midwest into the Mid-Atlantic, Northeast, Ontario and Quebec this week, posing significant health risks, especially to individuals lacking adequate cooling or hydration. The heatwave, though slightly easing later this week, will continue to impact much of the central and eastern U.S. Additionally, the Southwest and Upper Midwest will experience notable heavy rainfall, increasing flood risks in localized areas. Areas of wildfire smoke will be notable across the western U.S. and much of western to central Canada.
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HEADLINERS:
Key Weather Impacts:
Monday-Wednesday: Extreme heat expands from the Midwest to the Northeast, bringing dangerous temperatures and minimal overnight relief. Severe thunderstorms with extreme heat possible for parts of Ontatio and Quebec.
Tuesday: Heavy rainfall expected in the Southwest, especially across New Mexico.
Thursday-Friday: Heavy rainfall and flash flooding potential for the Upper Midwest, particularly in Wisconsin and the Upper Peninsula of Michigan.
Late week/weekend: Additional rounds of thunderstorms from the Midwest to the Eastern Seaboard, with scattered heavy rain possible.
Throughout the week: Continued extreme heat with Major to Extreme Heat Risk in the Midwest, Ohio Valley, and eastern states, with heat indices frequently above 100°F.
Weekend and beyond: Slight risk of extreme heat continues in the eastern U.S. (Saturday-Sunday, June 28-29). Episodic high winds are expected along coastal regions of central and northern California and southwestern Oregon (June 28-July 1).
ON THE RADAR:
KEEP AN EYE TO THE SKY:
IN THE GAUGES:
RECORDS MADE TO BE BROKEN:
ARE YOU CIRRUS?!
1982 At the South Pole Weather Station, Antarctica, the temperature fell to an all-time record low of -117 degrees.
1944 Four tornadoes killed 153 people and caused five million dollars in damage in Pennsylvania, West Virginia, and Maryland. The tornadoes moved southeast along parallel paths, flattening everything in their way. The town of Shinnston, WV, was leveled and left with the majority of the casualties.
A prolonged and dangerous heat wave will dominate the weather story this week as much of the central and eastern United States experiences some of the hottest weather of the year. Heat index values above 100 degrees will become widespread, with some communities seeing readings between 105 and 115 degrees and little relief at night. At the same time, several rounds of severe thunderstorms are expected from the High Plains through the Upper Midwest and Northeast, bringing the threat of damaging winds, large hail, and localized flash flooding. Out West, cooler-than-normal temperatures will continue while dry conditions keep wildfire concerns elevated across parts of the Four Corners and Great Basin. Air quality is an issue across Alberta to Quebec due to wildfire smoke. Heavy precipitation is possible from far eastern Saskatchewan to far western Manitoba.