Pennsylvania, 2000

Heat in Pennsylvania, January 2 to 4, 2000

January 2 to 4, 2000 · NWS PHI · 10 events in 10 counties and zones

A large high pressure system at the surface and in higher levels of the atmosphere over the western Atlantic Ocean continued the flow of mild and unseasonably warm air into the Middle Atlantic States. High temperatures were in the mid 50s to the mid 60s on the 2nd and 3rd and were in the 60s on the warmest day, the 4th.

Where it happened

Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
10

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.

A large high pressure system at the surface and in higher levels of the atmosphere over the western Atlantic Ocean continued the flow of mild and unseasonably warm air into the Middle Atlantic States. High temperatures were in the mid 50s to the mid 60s on the 2nd and 3rd and were in the 60s on the warmest day, the 4th. A daily high temperature record was set on the 3rd (63 degrees) at the Philadelphia International Airport. Due to higher historical records, no new daily temperature records were set on the 4th in Philadelphia or Allentown. A backdoor cold front tried to move south through Pennsylvania the night of the 2nd, but the strong ridge prevented its southward progress. A stronger cold frontal passage late in the afternoon on the 4th brought an end to the unseasonably warm weather. The highest temperatures included 68 degrees at the Franklin Institute within Philadelphia and Neshaminy Falls (Bucks County), 67 at the Philadelphia International Airport, 66 degrees in Easton (Northampton County) and Pottstown (Montgomery County), 65 degrees at the Lehigh Valley International Airport, Reading (Berks County) and Crum Creek (Delaware County), 64 degrees in Doylestown (Bucks County), 63 degrees in Springtown (Bucks County), 62 degrees in East Stroudsburg (Monroe County) and the Wilkes-Barre/Scranton International Airport (Luzerne County) and 58 degrees in Mount Pocono (Monroe County).

The radar

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

Open the radar archive at this moment

Event by event

10 heat. Local standard time, as filed.

Heat, Berks

When
January 2, 10:00 AM EST to January 4, 5:00 PM EST
Where
Berks forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.416, -75.926 (the zone’s center; the record gives no point)

Heat, Bucks

When
January 2, 10:00 AM EST to January 4, 5:00 PM EST
Where
Bucks forecast zone
Reported by
AWOS,ASOS,MESONET,ETC

Heat, Carbon

When
January 2, 10:00 AM EST to January 4, 5:00 PM EST
Where
Carbon forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.918, -75.709 (the zone’s center; the record gives no point)

Heat, Chester

When
January 2, 10:00 AM EST to January 4, 5:00 PM EST
Where
Chester forecast zone
Reported by
AWOS,ASOS,MESONET,ETC

Heat, Delaware

When
January 2, 10:00 AM EST to January 4, 5:00 PM EST
Where
Delaware forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
39.917, -75.399 (the zone’s center; the record gives no point)

Heat, Lehigh

When
January 2, 10:00 AM EST to January 4, 5:00 PM EST
Where
Lehigh forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.613, -75.592 (the zone’s center; the record gives no point)

Heat, Monroe

When
January 2, 10:00 AM EST to January 4, 5:00 PM EST
Where
Monroe forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
41.058, -75.339 (the zone’s center; the record gives no point)

Heat, Montgomery

When
January 2, 10:00 AM EST to January 4, 5:00 PM EST
Where
Montgomery forecast zone
Reported by
AWOS,ASOS,MESONET,ETC

Heat, Northampton

When
January 2, 10:00 AM EST to January 4, 5:00 PM EST
Where
Northampton forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.754, -75.307 (the zone’s center; the record gives no point)

Heat, Philadelphia

When
January 2, 10:00 AM EST to January 4, 5:00 PM EST
Where
Philadelphia forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.008, -75.134 (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 2000Every state in 2000This day in weather historyWarnings in Pennsylvania, January 2000

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: 5129223, 5129224, 5129225, 5129226, 5129227, 5129228, 5129229, 5129230, 5129562, 5129563.