Alert archive / Pennsylvania / Dense Fog Advisories in 2024

Dense Fog Advisory 1, NWS Philadelphia/Mount Holly

January 24, 20244 counties in Pennsylvania; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this dense fog advisory at Jan 24, 2024, 10:59 AM EST for 4 counties in Pennsylvania; New Castle County, Delaware. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jan 24, 2024, 10:59 AM EST (15:59 UTC)
Expired: Jan 24, 2024, 2:00 PM EST
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 89 km from the middle of the area, began a volume at 16:00 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 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 Jan 24, 4:28 AM EST, 6 hours 31 minutes earlier.

Area forecast discussion, Jan 24, 4:28 AM EST, 6 hours 31 minutes before

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Hazardous weather outlook, Jan 24, 10:37 AM EST, 22 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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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
Jan 24, 1:58 AM EST	Small Craft Advisory	PHI		29 hr
Jan 24, 2:14 PM EST	Dense Fog Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 4 more	11 hr
Jan 24, 2:19 PM EST	Marine Dense Fog Advisory	PHI		7 hr

Nearby

Dense Fog Advisories in Pennsylvania, 2024 Dense Fog Advisories in Delaware, 2024 Every dense fog advisory in 2024

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.