Alert archive / New Jersey / River Flood Warnings in 2024

River Flood Warning 40, NWS Philadelphia/Mount Holly

March 9, 2024Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this river flood warning at Mar 9, 2024, 9:56 AM EST for Somerset County, New Jersey. It took effect at Mar 10, 2024, 12:12 PM EDT. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: Mar 9, 2024, 9:56 AM EST (14:56 UTC)
In effect from: Mar 10, 2024, 12:12 PM EDT
Expired: Mar 10, 2024, 9:37 PM EDT
In force: 9 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: Minor

County Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 61 km from the middle of the area, began a volume at 15:01 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.

The river

Written for the forecast point Millstone River at Blackwells Mills (BKWN4). The gauge peaked at 8.87 ft at Mar 10, 2024, 7:00 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.

The text

As transmitted.

751 
WGUS41 KPHI 091456
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
956 AM EST Sat Mar 9 2024

...The National Weather Service in Mount Holly NJ has issued a Flood 
Warning for the following rivers in New Jersey...

  Millstone River At Blackwells Mills affecting Somerset County.



For the Millstone River...including Blackwells Mills...Minor 
flooding is forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Additional information is available at www.weather.gov/phi.

The next statement will be issued this evening at 1000 PM EST.

&&

NJC035-100300-
/O.NEW.KPHI.FL.W.0040.240310T1612Z-240311T1252Z/
/BKWN4.1.ER.240310T1612Z.240311T0000Z.240311T0651Z.NO/
956 AM EST Sat Mar 9 2024

...FLOOD WARNING IN EFFECT FROM SUNDAY AFTERNOON TO MONDAY MORNING...

* WHAT...Minor flooding is forecast.

* WHERE...Millstone River at Blackwells Mills.

* WHEN...From Sunday afternoon to Monday morning.

* IMPACTS...At 6.0 feet, The Griggstown Causeway is closed due to 
  flooding.
  At 7.0 feet, Several more causeways are closed due to flooding.
  At 9.0 feet, Flood stage reached with flooding now along River 
  Road in Blackwells Mills and S. River Street in Millstone. Base of 
  Route 533 bridge floods. River Road between Yorktown and Amsterdam 
  is subject to closure. Canal Road near Suydam Road floods.
  At 10.0 feet, The D&R Canal is flooded by the Millstone River.

* ADDITIONAL DETAILS...
  - At 9:15 AM EST Saturday the stage was 4.0 feet.
  - Forecast...The river is expected to rise above flood stage
    early tomorrow afternoon to a crest of 9.5 feet tomorrow
    evening. It will then fall below flood stage early Monday
    morning.
  - Flood stage is 9.0 feet.
  - Flood History...This crest compares to a previous crest of
    9.5 feet on 12/26/2020.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (7 am)        Crest
Location        Stg   Stg Day/Time    Sun  Mon        Stg Time Date

Millstone River
Blackwells Mill 9.0   4.0  Sat 9 am   8.3  8.4        9.5 8pm 3/10


&&

LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
      4046 7454 4043 7456


$$

Fitzsimmons

4 follow-up statements

185 
WGUS81 KPHI 100211
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
911 PM EST Sat Mar 9 2024

...The Flood Warning continues for the following rivers in New 
Jersey...

  Millstone River At Blackwells Mills affecting Somerset County.



For the Millstone River...including Blackwells Mills...Minor 
flooding is forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Additional information is available at www.weather.gov/phi.

The next statement will be issued Sunday morning at 1015 AM EDT.

&&

NJC035-101415-
/O.CON.KPHI.FL.W.0040.240310T1612Z-240311T1252Z/
/BKWN4.1.ER.240310T1525Z.240311T0000Z.240311T0730Z.NO/
911 PM EST Sat Mar 9 2024

...FLOOD WARNING REMAINS IN EFFECT FROM SUNDAY AFTERNOON TO MONDAY 
MORNING...

* WHAT...Minor flooding is forecast.

* WHERE...Millstone River at Blackwells Mills.

* WHEN...From Sunday afternoon to Monday morning.

* IMPACTS...At 6.0 feet, The Griggstown Causeway is closed due to 
  flooding.
  At 7.0 feet, Several more causeways are closed due to flooding.
  At 9.0 feet, Flood stage reached with flooding now along River 
  Road in Blackwells Mills and S. River Street in Millstone. Base of 
  Route 533 bridge floods. River Road between Yorktown and Amsterdam 
  is subject to closure. Canal Road near Suydam Road floods.
  At 10.0 feet, The D&R Canal is flooded by the Millstone River.

* ADDITIONAL DETAILS...
  - At 8:15 PM EST Saturday the stage was 3.6 feet.
  - Forecast...The river is expected to rise above flood stage
    late tomorrow morning to a crest of 9.6 feet tomorrow
    evening. It will then fall below flood stage early Monday
    morning.
  - Flood stage is 9.0 feet.
  - Flood History...This crest compares to a previous crest of
    9.7 feet on 01/19/2015.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (7 pm)        Crest
Location        Stg   Stg Day/Time    Sun  Mon        Stg Time Date

Millstone River
Blackwells Mill 9.0   3.6  Sat 8 pm   9.6  6.4        9.6 8pm 3/10


&&

LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
      4046 7454 4043 7456


$$

Kruzdlo

542 
WGUS81 KPHI 100757
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
357 AM EDT Sun Mar 10 2024

...The Flood Warning is extended for the following rivers in New 
Jersey...

  Millstone River At Blackwells Mills affecting Somerset County.



For the Millstone River...including Blackwells Mills...Minor 
flooding is forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Additional information is available at www.weather.gov/phi.

The next statement will be issued this afternoon at 400 PM EDT.

&&

NJC035-102000-
/O.EXT.KPHI.FL.W.0040.240310T1545Z-240311T1434Z/
/BKWN4.1.ER.240310T1545Z.240311T0000Z.240311T0834Z.NO/
357 AM EDT Sun Mar 10 2024

...FLOOD WARNING NOW IN EFFECT FROM THIS MORNING TO LATE TOMORROW 
MORNING...

* WHAT...Minor flooding is forecast.

* WHERE...Millstone River at Blackwells Mills.

* WHEN...From this morning to late tomorrow morning.

* IMPACTS...At 6.0 feet, The Griggstown Causeway is closed due to 
  flooding.
  At 7.0 feet, Several more causeways are closed due to flooding.
  At 9.0 feet, Flood stage reached with flooding now along River 
  Road in Blackwells Mills and S. River Street in Millstone. Base of 
  Route 533 bridge floods. River Road between Yorktown and Amsterdam 
  is subject to closure. Canal Road near Suydam Road floods.
  At 10.0 feet, The D&R Canal is flooded by the Millstone River.

* ADDITIONAL DETAILS...
  - At 3:15 AM EDT Sunday the stage was 6.8 feet.
  - Forecast...The river is expected to rise above flood stage
    late this morning to a crest of 9.6 feet this evening. It
    will then fall below flood stage late tonight.
  - Flood stage is 9.0 feet.
  - Flood History...This crest compares to a previous crest of
    9.7 feet on 01/19/2015.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (1 am)        Crest
Location        Stg   Stg Day/Time    Mon  Tue        Stg Time Date

Millstone River
Blackwells Mill 9.0   6.8  Sun 3 am   9.3  5.1        9.6 8pm 3/10


&&

LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
      4046 7454 4043 7456


$$

RCM

716 
WGUS81 KPHI 101518
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
1118 AM EDT Sun Mar 10 2024

...The Flood Warning continues for the following rivers in New 
Jersey...

  Millstone River At Blackwells Mills affecting Somerset County.



For the Millstone River...including Blackwells Mills...Minor 
flooding is forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Additional information is available at www.weather.gov/phi.

The next statement will be issued this evening at 1130 PM EDT.

&&

NJC035-110330-
/O.EXT.KPHI.FL.W.0040.240310T2000Z-240311T1312Z/
/BKWN4.1.ER.240310T2000Z.240311T0000Z.240311T0712Z.NO/
1118 AM EDT Sun Mar 10 2024

...FLOOD WARNING NOW IN EFFECT FROM THIS AFTERNOON TO LATE TOMORROW 
MORNING...

* WHAT...Minor flooding is forecast.

* WHERE...Millstone River at Blackwells Mills.

* WHEN...From this afternoon to late tomorrow morning.

* IMPACTS...At 6.0 feet, The Griggstown Causeway is closed due to 
  flooding.
  At 7.0 feet, Several more causeways are closed due to flooding.
  At 9.0 feet, Flood stage reached with flooding now along River 
  Road in Blackwells Mills and S. River Street in Millstone. Base of 
  Route 533 bridge floods. River Road between Yorktown and Amsterdam 
  is subject to closure. Canal Road near Suydam Road floods.
  At 10.0 feet, The D&R Canal is flooded by the Millstone River.

* ADDITIONAL DETAILS...
  - At 10:30 AM EDT Sunday the stage was 8.2 feet.
  - Forecast...The river is expected to rise above flood stage
    late this afternoon to a crest of 9.2 feet this evening. It
    will then fall below flood stage late tonight.
  - Flood stage is 9.0 feet.
  - Flood History...This crest compares to a previous crest of
    9.2 feet on 03/12/2011.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (2 pm)        Crest
Location        Stg   Stg Day/Time    Mon  Tue        Stg Time Date

Millstone River
Blackwells Mill 9.0   8.2  Sun 10 a   7.1  3.1        9.2 8pm 3/10


&&

LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
      4046 7454 4043 7456


$$

Fitzsimmons

853 
WGUS81 KPHI 110137
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
937 PM EDT Sun Mar 10 2024

...The Flood Warning is cancelled for the following rivers in New 
Jersey...

  Millstone River At Blackwells Mills affecting Somerset County.



NJC035-110245-
/O.CAN.KPHI.FL.W.0040.000000T0000Z-240311T0137Z/
/BKWN4.1.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
937 PM EDT Sun Mar 10 2024

...FLOOD WARNING IS CANCELLED...

The Flood Warning is cancelled for
  the Millstone River At Blackwells Mills.

* ADDITIONAL DETAILS...
  - At 9:15 PM EDT Sunday the stage was 8.9 feet.
  - Forecast...The river is expected to fall to 2.5 feet
    Wednesday evening.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (8 pm)        Crest
Location        Stg   Stg Day/Time    Mon  Tue        Stg Time Date

Millstone River
Blackwells Mill 9.0   8.9  Sun 9 pm   5.4  2.8         Crested


&&

LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
      4046 7454 4043 7456


$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 9, 3:12 AM EST	Gale Warning	PHI		62 hr
Mar 9, 3:12 AM EST	Small Craft Advisory	PHI		15 hr
Mar 9, 3:51 AM EST	Coastal Flood Warning	PHI	Burlington, Camden, Cumberland, Gloucester, Mercer, Monmouth and 2 more	37 hr
Mar 9, 9:52 AM EST	River Flood Warning	PHI	Essex, Morris, Passaic	5 days
Mar 9, 2:43 PM EST	Wind Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	51 hr

Nearby

River Flood Warnings in New Jersey, 2024 Every river flood warning 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; the gauge from the NWS water service and the USGS.