A strong southwesterly flow ahead of a cold front brought hot humid air northward into the region. The front's passage heralded the end of the heat.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PHI wrote it up.
A strong southwesterly flow ahead of a cold front brought hot humid air northward into the region. The front's passage heralded the end of the heat.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before the first event at Jun 11, 1:03 PM EST, 57 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
2 excessive heat. Local standard time, as filed.
The heat index at Philadelphia International Airport reached 105 degrees on June 11th and 106 degrees on June 12th.
The heat index at Philadelphia International Airport reached 105 degrees on June 11th and 106 degrees on June 12th.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2026Every state in 2026This day in weather historyWarnings in Pennsylvania, June 2026
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 1341194, 1341195.