River Flood Warning 4, NWS Philadelphia/Mount Holly

Issued

Sep 27, 2026, 3:29 PM EDT (19:29 UTC)

In effect from

Sep 28, 2026, 1:27 AM EDT

Expired

Sep 28, 2026, 2:52 AM EDT

In force

85 min

Issued by

NWS Philadelphia/Mount Holly

Area

Storm-based polygon

Flood severity

Minor

County Somerset County, NJ

The Philadelphia radar (KDIX), 71 km from the middle of the area, began a volume at 19:29 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.

Written for the forecast point Millstone River at Blackwells Mills (BKWN4). The gauge peaked at 7.89 ft at Sep 28, 2026, 8:00 PM EDT.

Action stage

7 ft

Minor stage

9 ft

Moderate stage

10 ft

Major stage

15 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01402000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this river flood warning went out at Sep 26, 7:48 PM EDT, 19 hours 41 minutes earlier.

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River Flood Warnings in New Jersey, 2026Every river flood warning in 2026

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; the gauge from the NWS water service and the USGS.