Pennsylvania, 2026

Dense Fog in Pennsylvania, April 5, 2026

April 5, 2026 · NWS PHI · 5 events in 5 counties and zones

A warm front lifting north across the region resulted in areas of dense fog before dawn on April 5th. The fog dissipated by late morning.

Where it happened

Every event with a place to put it; 5 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
5

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 lifting north across the region resulted in areas of dense fog before dawn on April 5th. The fog dissipated by late morning.

The radar

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

Open the radar archive at this moment

Event by event

5 dense fog. Local standard time, as filed.

Dense Fog, Lower Bucks

When
April 5, 1:00 AM EST to 10:00 AM EST
Where
Lower Bucks forecast zone
Reported by
ASOS
Coordinates
40.337, -75.107 (the zone’s center; the record gives no point)

Several hours of dense fog was observed at Doylestown Airport.

Dense Fog, Upper Bucks

When
April 5, 1:00 AM EST to 10:00 AM EST
Where
Upper Bucks forecast zone
Reported by
ASOS
Coordinates
40.337, -75.107 (the zone’s center; the record gives no point)

Several hours of dense fog was observed at Doylestown Airport, Pennridge Airport and Quakertown Airport.

Dense Fog, Eastern Montgomery

When
April 5, 1:00 AM EST to 10:00 AM EST
Where
Eastern Montgomery forecast zone
Reported by
AWOS
Coordinates
40.211, -75.367 (the zone’s center; the record gives no point)

Several hours of dense fog was observed at Wings Field.

Dense Fog, Western Montgomery

When
April 5, 1:00 AM EST to 10:00 AM EST
Where
Western Montgomery forecast zone
Reported by
ASOS
Coordinates
40.211, -75.367 (the zone’s center; the record gives no point)

Several hours of dense fog was observed at Heritage Field.

Dense Fog, Western Chester

When
April 5, 1:00 AM EST to 10:00 AM EST
Where
Western Chester forecast zone
Reported by
AWOS
Coordinates
39.973, -75.748 (the zone’s center; the record gives no point)

Several hours of dense fog was observed at Chester County Airport.

What these are

Dense Fog
Fog reducing visibility to a quarter mile or less, filed where it caused accidents or disruption.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Pennsylvania in 2026Every state in 2026This day in weather historyWarnings in Pennsylvania, April 2026

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: 1321736, 1321737, 1321738, 1321739, 1321740.