Pennsylvania, 2009

Heat in Pennsylvania, April 25 to 27, 2009

April 25 to 27, 2009 · NWS PHI · 7 events in 7 counties and zones

An unusually early heat wave affected southeastern Pennsylvania from April 25th through the 27th with high temperatures in the lower 90s each day. High temperatures also reached into the lower 90s on the 26th and 27th in the Lehigh Valley.

Where it happened

Every event with a place to put it; 4 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

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  • Floods
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  • Winter weather
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  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
25
Property damage
None recorded
Crop damage
None recorded
Events
7

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.

What happened

The episode as NWS PHI wrote it up.

An unusually early heat wave affected southeastern Pennsylvania from April 25th through the 27th with high temperatures in the lower 90s each day. High temperatures also reached into the lower 90s on the 26th and 27th in the Lehigh Valley. The combination of the early hot weather and inadequate supplies of water led to more than two dozen people suffering heat exhaustion at a Gatorade Replay football game in Easton (Northampton County) on the 26th. Over 13,000 fans were at the stadium. At least two people were transported to Easton Hospital. The high temperature at Lehigh Valley International Airport on the 26th was 90 degrees.

The highest temperature during the stretch was 93 degrees at the Philadelphia International Airport and 91 degrees at the Lehigh Valley International Airport. This was the first April heat wave in Philadelphia since 2002. A cold front that moved through on the 28th (when temperatures fell just short of reaching 90) ended the hot weather.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

7 heat. Local standard time, as filed.

Heat, Bucks

When
April 25, 11:00 AM EST to April 27, 5:00 PM EST
Where
Bucks forecast zone
Reported by
Newspaper

Heat, Chester

When
April 25, 11:00 AM EST to April 27, 5:00 PM EST
Where
Chester forecast zone
Reported by
Newspaper

Heat, Delaware

When
April 25, 11:00 AM EST to April 27, 5:00 PM EST
Where
Delaware forecast zone
Reported by
Newspaper
Coordinates
39.917, -75.399 (the zone’s center; the record gives no point)

Heat, Montgomery

When
April 25, 11:00 AM EST to April 27, 5:00 PM EST
Where
Montgomery forecast zone
Reported by
Newspaper

Heat, Philadelphia

When
April 25, 11:00 AM EST to April 27, 5:00 PM EST
Where
Philadelphia forecast zone
Reported by
Newspaper
Coordinates
40.008, -75.134 (the zone’s center; the record gives no point)

Heat, Lehigh

When
April 26, 11:00 AM EST to April 27, 5:00 PM EST
Where
Lehigh forecast zone
Reported by
Newspaper
Coordinates
40.613, -75.592 (the zone’s center; the record gives no point)

Heat, Northampton

When
April 26, 11:00 AM EST to April 27, 5:00 PM EST
Where
Northampton forecast zone
Injuries
25 direct, 0 indirect
Reported by
Newspaper
Coordinates
40.754, -75.307 (the zone’s center; the record gives no point)

What these are

Heat
Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Pennsylvania in 2009Every state in 2009This day in weather historyWarnings in Pennsylvania, April 2009

Sources

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 2026-09-24. Each event’s entry at NCEI: 163374, 163375, 163376, 163377, 163378, 163372, 163373.