Alert archive / New Jersey / Dense Fog Advisories in 2026

Dense Fog Advisory 3, NWS Philadelphia/Mount Holly

February 17, 202616 counties in New Jersey; 10 counties in Pennsylvania; Kent County, New Castle County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this dense fog advisory at Feb 17, 2026, 1:15 PM EST for 16 counties in New Jersey; 10 counties in Pennsylvania; Kent County, New Castle County, Sussex County, Delaware. It took effect at Feb 17, 2026, 10:00 PM EST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Feb 17, 2026, 1:15 PM EST (18:15 UTC)
In effect from: Feb 17, 2026, 10:00 PM EST
Expired: Feb 18, 2026, 10:00 AM EST
In force: 12 hr
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

What forecasters said that day

The local office's own words before this dense fog advisory 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 dense fog advisory went out at Feb 17, 12:25 PM EST, 50 minutes earlier.

Area forecast discussion, Feb 17, 12:25 PM EST, 50 minutes before

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Hazardous weather outlook, Feb 17, 5:05 AM EST, 8 hours 10 minutes before

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
505 AM EST Tue Feb 17 2026

MDZ012-015-019-020-181015-
Kent MD-Queen Annes-Talbot-Caroline-
505 AM EST Tue Feb 17 2026

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Hoeflich

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 17, 1:16 PM EST	Marine Dense Fog Advisory	PHI		40 hr

Nearby

Dense Fog Advisories in New Jersey, 2026 Dense Fog Advisories in Pennsylvania, 2026 Dense Fog Advisories in Delaware, 2026 Every dense fog advisory 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.