New Jersey, 1999

Heavy Rain in New Jersey, August 26, 1999

August 26, 1999 · NWS PHI · 6 events in 6 counties and zones

A warm front tried to move through central and northern New Jersey on the 26th. It helped trigger thunderstorms with heavy rain.

Where it happened

Every event with a place to put it; 6 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
6

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 warm front tried to move through central and northern New Jersey on the 26th. It helped trigger thunderstorms with heavy rain. The front never cleared northwest New Jersey as a weak low pressure system moved across southern Pennsylvania and New Jersey. Heavy rain started in the central part of the state around 1 a.m. EDT on the 26th and spread north to the New York border by around 3 a.m. EDT. The heavy rain ended around daybreak on the 26th. Radar estimates, SKYWARN and Hydrological spotter reports showed that most storm totals averaged between 1.0 to 2.5 inches. Higher amounts (as much as an estimated 4 inches) fell in far northeastern Middlesex County. Some urban and poor drainage flooding occurred, but no serious problems were reported. Storm totals included 2.25 inches in Reigelsville (Warren County), 2.23 inches in Lambertville (Hunterdon County), 2.08 inches in Boonton (Morris County), 2.04 inches in Pequannock (Morris County), 1.94 inches in New Brunswick (Middlesex County), 1.92 inches in Basking Ridge (Somerset County), 1.84 inches in Wantage (Sussex County), 1.60 inches in Andover (Sussex County), 1.55 inches in Belvidere (Warren County) and Flemington (Hunterdon County), 1.43 inches in Watchung (Somerset County), 1.12 inches in Belle Mead (somerset County), 1.10 inches in Clinton (Hunterdon County) and 1.00 inch in Long Valley (Morris County).

The radar

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

Open the radar archive at this moment

Event by event

6 heavy rain. Local standard time, as filed.

Heavy Rain, Hunterdon

When
August 26, 12:00 AM EST to 5:00 AM EST
Where
Hunterdon County, Countywide
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.567, -74.912 (the zone’s center; the record gives no point)

Heavy Rain, Middlesex

When
August 26, 12:00 AM EST to 6:00 AM EST
Where
Middlesex County, Countywide
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.440, -74.409 (the zone’s center; the record gives no point)

Heavy Rain, Somerset

When
August 26, 12:00 AM EST to 5:00 AM EST
Where
Somerset County, Countywide
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.564, -74.616 (the zone’s center; the record gives no point)

Heavy Rain, Morris

When
August 26, 1:00 AM EST to 7:00 AM EST
Where
Morris County, Countywide
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.862, -74.544 (the zone’s center; the record gives no point)

Heavy Rain, Sussex

When
August 26, 1:00 AM EST to 7:00 AM EST
Where
Sussex County, Countywide
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
41.140, -74.690 (the zone’s center; the record gives no point)

Heavy Rain, Warren

When
August 26, 1:00 AM EST to 6:00 AM EST
Where
Warren County, Countywide
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.857, -74.997 (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 New Jersey in 1999Every state in 1999This day in weather historyWarnings in New Jersey, August 1999

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: 5718094, 5718095, 5718097, 5718096, 5718098, 5718099.