Alert archive / New Jersey / Extreme Heat Warnings in 2026

Extreme Heat Warning 1, NWS Philadelphia/Mount Holly

June 30, 202616 counties in New Jersey; 10 counties in Pennsylvania; Kent County, New Castle County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this extreme heat warning at Jun 30, 2026, 2:44 AM EDT for 16 counties in New Jersey; 10 counties in Pennsylvania; Kent County, New Castle County, Sussex County, Delaware. It took effect at Jul 1, 2026, 12:00 PM EDT. It was in force for 3 days. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 30, 2026, 2:44 AM EDT (06:44 UTC)
In effect from: Jul 1, 2026, 12:00 PM EDT
Expired: Jul 4, 2026, 8:00 PM EDT
In force: 3 days
Issued by: NWS Philadelphia/Mount Holly

All 29 counties

Kent County, DE, New Castle County, DE, Sussex County, DE, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 59 km from the middle of the area, began a volume at 06:44 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this extreme heat warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this extreme heat warning went out at Jun 30, 1:46 AM EDT, 58 minutes earlier.

Area forecast discussion, Jun 30, 1:46 AM EDT, 58 minutes before

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Hazardous weather outlook, Jun 29, 5:05 AM EDT, 21 hours 39 minutes before

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The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 30, 2:47 AM EDT	Small Craft Advisory	PHI		21 hr
Jun 30, 4:10 PM EDT	Rip Current Statement	PHI	Atlantic, Cape May	28 hr

Nearby

Extreme Heat Warnings in New Jersey, 2026 Extreme Heat Warnings in Pennsylvania, 2026 Extreme Heat Warnings in Delaware, 2026 Every extreme heat warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.