Pennsylvania, 2000

Heavy Rain in Pennsylvania, September 25 to 26, 2000

September 25 to 26, 2000 · NWS PHI · 3 events in 3 counties and zones

A slow moving low pressure system helped drop heavy rain across extreme southeast Pennsylvania. Storm totals averaged between 2 and 3 inches.

Where it happened

Every event with a place to put it; 3 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
3

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 slow moving low pressure system helped drop heavy rain across extreme southeast Pennsylvania. Storm totals averaged between 2 and 3 inches. The heaviest rain fell during the evening of the 25th. While the rain was heavy, hourly totals did not exceed 0.50 inches and this kept the major streams, creeks and rivers within their banks. Nevertheless there was considerable urban, low-lying area and poor drainage flooding. Storm totals included 2.81 inches at the Northeast Philadelphia Airport, 2.75 inches in Crum Creek (Delaware County), 2.70 inches in Downingtown (Chester County), 2.63 inches in West Chester (Chester County), 2.42 inches in Exton (Chester County), 2.37 inches at the Philadelphia International Airport and the Franklin Institute within Philadelphia, 2.27 inches in Chadds Ford (Delaware County), 2.10 inches in Wynnewood (Montgomery County), 2.02 inches in Glenmoore (Chester County), 1.97 inches in Valley Forge (Chester County), 1.83 inches in Neshaminy Falls (Bucks County), 1.61 inches in Doylestown (Bucks County) and 1.42 inches in Pottstown (Montgomery County). The low pressure system responsible for the heavy rain, traveled from the lower Tennessee Valley the morning of the 25th to just east of Wallops Island, Virginia the morning of the 26th. By the evening of the 26th, the low was well offshore.

The radar

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

Open the radar archive at this moment

Event by event

3 heavy rain. Local standard time, as filed.

Heavy Rain, Chester

When
September 25, 1:00 PM EST to September 26, 7:00 AM EST
Where
Chester County, Countywide
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
39.973, -75.748 (the zone’s center; the record gives no point)

Heavy Rain, Delaware

When
September 25, 1:00 PM EST to September 26, 7:00 AM EST
Where
Delaware County, Countywide
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
39.917, -75.399 (the zone’s center; the record gives no point)

Heavy Rain, Philadelphia

When
September 25, 1:00 PM EST to September 26, 7:00 AM EST
Where
Philadelphia County, Countywide
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.008, -75.134 (the zone’s center; the record gives no point)

What these are

Heavy Rain
Rainfall totals unusual for the place and season that did not produce a flood.

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, September 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: 5156792, 5156793, 5156794.