New Jersey, 1999

Heat in New Jersey, July 4 to 6, 1999

July 4 to 6, 1999 · NWS OKX · 6 events in 6 counties and zones

On Sunday July 4th, temperatures soared into the mid and upper 90s. On Monday July 5th, many new maximum temperature records were set.

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

Open the live radar over this ground

The toll

Deaths
10
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 OKX wrote it up.

An extremely hot and humid airmass covered the region from July 4th through July 6th.On Sunday July 4th, temperatures soared into the mid and upper 90s. The combination of high temperatures and moderate humidity caused most heat indices to range from 100 to 105 degrees.On Monday July 5th, many new maximum temperature records were set. At Newark Airport, the temperature reached 103 degrees, which set a new record high. At Teterboro Airport, the temperature reached 100 degrees. Most high temperatures ranged from 100 to 105 degrees. Heat indices peaked from 110 to 115 degrees. "Rolling" electrical blackouts occurred across urban areas.On July 6th, new record high temperatures were set again. At Newark Airport, the temperature reached 102 degrees, which set another new record. At Teterboro Airport, the temperature reached 100 degrees for the second consecutive day. Once again, heat indices peaked from 110 to 115 degrees. More significant blackouts occurred, especially in urban areas.The heat wave was directly responsible for killing 10 people:o 3 from Essex Countyo 3 from Hudson Countyo 3 from Union Countyo 1 from Passaic 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 heat. Local standard time, as filed.

Heat, Essex

When
July 4, 2:30 PM EST to July 6, 5:00 PM EST
Where
Essex forecast zone
Deaths
3 direct, 0 indirect
Reported by
AWOS,ASOS,MESONET,ETC

Heat, Union

When
July 4, 2:30 PM EST to July 6, 5:00 PM EST
Where
Union forecast zone
Deaths
3 direct, 0 indirect
Reported by
BROADCAST MEDIA

Heat, Hudson

When
July 4, 2:30 PM EST to July 6, 5:00 PM EST
Where
Hudson forecast zone
Deaths
3 direct, 0 indirect
Reported by
BROADCAST MEDIA
Coordinates
40.731, -74.076 (the zone’s center; the record gives no point)

Heat, Bergen

When
July 4, 3:00 PM EST to July 6, 4:30 PM EST
Where
Bergen forecast zone
Reported by
AWOS,ASOS,MESONET,ETC

Heat, Eastern Passaic

When
July 4, 3:00 PM EST to July 6, 4:30 PM EST
Where
Eastern Passaic forecast zone
Deaths
1 direct, 0 indirect
Reported by
BROADCAST MEDIA
Coordinates
41.034, -74.300 (the zone’s center; the record gives no point)

Heat, Western Passaic

When
July 4, 3:30 PM EST to July 6, 4:00 PM EST
Where
Western Passaic forecast zone
Reported by
BROADCAST MEDIA
Coordinates
41.034, -74.300 (the zone’s center; the record gives no point)

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

EventDateAgeSexWhereKind
Heat, Essex1999-07-0738FemaleOtherDirect
Heat, Essex1999-07-1068MaleOtherDirect
Heat, Essex1999-07-1085FemaleOtherDirect
Heat, Union1999-07-0678MaleOtherDirect
Heat, Union1999-07-0779MaleOtherDirect
Heat, Union1999-07-0680FemaleOtherDirect
Heat, Hudson1999-07-0444FemaleOtherDirect
Heat, Hudson1999-07-0452FemaleOtherDirect
Heat, Hudson1999-07-0676FemaleOtherDirect
Heat, Eastern Passaic1999-07-0688FemaleOtherDirect

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 New Jersey in 1999Every state in 1999This day in weather historyWarnings in New Jersey, July 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 2026-10-01. Each event’s entry at NCEI: 5701103, 5701104, 5701105, 5701106, 5701107, 5701108.