Alert archive / New Jersey / River Flood Warnings in 2021
River Flood Warning 49, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this river flood warning at Sep 1, 2021, 4:41 PM EDT for Somerset County, New Jersey. It took effect at Sep 1, 2021, 10:53 PM EDT. It was in force for 55 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 1, 2021, 4:41 PM EDT (20:41 UTC)
- In effect from
- Sep 1, 2021, 10:53 PM EDT
- Expired
- Sep 4, 2021, 5:41 AM EDT
- In force
- 55 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- Moderate
County Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 61 km from the middle of the area, began a volume at 20:43 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 20.81 ft at Sep 2, 2021, 11:00 AM 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.
146
WGUS41 KPHI 012041
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
441 PM EDT Wed Sep 1 2021
...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...Moderate
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.
NJC035-020845-
/O.NEW.KPHI.FL.W.0049.210902T0900Z-210904T0000Z/
/BKWN4.2.ER.210902T0900Z.210903T0000Z.210903T1800Z.NO/
441 PM EDT Wed Sep 1 2021
The National Weather Service in Mount Holly has issued a
* Flood Warning for
the Millstone River At Blackwells Mills.
* From late tonight to Friday evening.
* At 4:15 PM EDT Wednesday the stage was 2.1 feet.
* Flood stage is 9.0 feet.
* Moderate flooding is forecast.
* Forecast...The river is expected to rise above flood stage late
tonight to a crest of 11.5 feet tomorrow evening. It will then
fall below flood stage early Friday afternoon.
* Impact...At 6.0 feet, The Griggstown Causway is closed due to
flooding.
* Impact...At 7.0 feet, Several more causways are closed due to
flooding.
* Impact...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.
* Impact...At 10.0 feet, The D&R Canal is flooded by the Millstone
River.
* Flood History...This crest compares to a previous crest of 11.4
feet on 04/03/2005.
&&
Fld Observed Forecasts (2 pm EDT)
Location Stg Stg Day/Time Thu Fri Sat
Millstone River
Blackwells Mill 9.0 2.1 Wed 4 pm EDT 11.2 9.0 3.9
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
Kruzdlo11 follow-up statements
761
WGUS41 KPHI 020159 RRA
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
959 PM EDT Wed Sep 1 2021
...Forecast flooding changed from Moderate to Major severity and
increased in duration for the following rivers in New Jersey...
Millstone River At Blackwells Mills affecting Somerset County.
For the Millstone River...including Blackwells Mills...Major
flooding is forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Additional information is available at www.weather.gov/phi.
NJC035-021400-
/O.EXT.KPHI.FL.W.0049.210902T0253Z-210904T1614Z/
/BKWN4.3.ER.210902T0253Z.210903T0000Z.210904T1014Z.NO/
959 PM EDT Wed Sep 1 2021
...Forecast flooding increased from Moderate to Major severity and
increased in duration until early Saturday afternoon...
The Flood Warning continues for
the Millstone River At Blackwells Mills.
* Until Saturday afternoon.
* At 9:15 PM EDT Wednesday the stage was 7.6 feet.
* Flood stage is 9.0 feet.
* Major flooding is forecast.
* Forecast...The river is expected to rise above flood stage late
this evening to a crest of 17.0 feet tomorrow evening. It will
then fall below flood stage Saturday morning.
* Impact...At 6.0 feet, The Griggstown Causway is closed due to
flooding.
* Impact...At 7.0 feet, Several more causways are closed due to
flooding.
* Impact...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.
* Impact...At 10.0 feet, The D&R Canal is flooded by the Millstone
River.
* Impact...At 13.0 feet, Washington Street and several businesses
are flooded.
* Flood History...This crest compares to a previous crest of 16.8
feet on 07/15/1975.
&&
Fld Observed Forecasts (8 pm EDT)
Location Stg Stg Day/Time Thu Fri Sat
Millstone River
Blackwells Mill 9.0 7.6 Wed 9 pm EDT 17.0 12.0 4.7
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
Meola896
WGUS81 KPHI 020456
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
1256 AM EDT Thu Sep 2 2021
...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...Major
flooding is forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Additional information is available at www.weather.gov/phi.
NJC035-021700-
/O.EXT.KPHI.FL.W.0049.000000T0000Z-210904T1638Z/
/BKWN4.3.ER.210902T0213Z.210903T0000Z.210904T1038Z.NO/
1256 AM EDT Thu Sep 2 2021
...The Flood Warning is now in effect until early Saturday
afternoon...
The Flood Warning continues for
the Millstone River At Blackwells Mills.
* Until Saturday afternoon.
* At 12:15 AM EDT Thursday the stage was 14.5 feet.
* Flood stage is 9.0 feet.
* Moderate flooding is occurring and major flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 12:15 AM EDT Thursday was 14.5 feet.
* Forecast...The river is expected to rise to a crest of 19.5 feet
this evening. It will then fall below flood stage Saturday morning.
* Impact...At 6.0 feet, The Griggstown Causway is closed due to
flooding.
* Impact...At 7.0 feet, Several more causways are closed due to
flooding.
* Impact...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.
* Impact...At 10.0 feet, The D&R Canal is flooded by the Millstone
River.
* Impact...At 13.0 feet, Washington Street and several businesses
are flooded.
* Flood History...This crest compares to a previous crest of 19.2
feet on 04/16/2007.
&&
Fld Observed Forecasts (2 am EDT)
Location Stg Stg Day/Time Fri Sat Sun
Millstone River
Blackwells Mill 9.0 14.5 Thu 12 am ED 18.5 10.7 MSG
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
Meola392
WGUS81 KPHI 020804
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
404 AM EDT Thu Sep 2 2021
...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...Major
flooding is forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Additional information is available at www.weather.gov/phi.
NJC035-022015-
/O.EXT.KPHI.FL.W.0049.000000T0000Z-210904T1000Z/
/BKWN4.3.ER.210902T0213Z.210902T1800Z.210904T0400Z.NR/
404 AM EDT Thu Sep 2 2021
...The Flood Warning is now in effect until Saturday morning...
The Flood Warning continues for
the Millstone River At Blackwells Mills.
* Until Saturday morning.
* At 3:15 AM EDT Thursday the stage was 19.3 feet.
* Flood stage is 9.0 feet.
* Major flooding is occurring and major flooding is forecast. This
approaches the flood of record.
* Recent Activity...The maximum river stage in the 24 hours ending
at 3:15 AM EDT Thursday was 19.3 feet.
* Forecast...The river is expected to rise to a crest of 20.8 feet
this afternoon. It will then fall below flood stage early Saturday
morning.
* Impact...At 6.0 feet, The Griggstown Causeway is closed due to
flooding.
* Impact...At 7.0 feet, Several more causeways are closed due to
flooding.
* Impact...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.
* Impact...At 10.0 feet, The D&R Canal is flooded by the Millstone
River.
* Impact...At 13.0 feet, Washington Street and several businesses
are flooded.
* Flood History...This crest compares to a previous crest of 21.0
feet on 09/17/1999.
&&
Fld Observed Forecasts (2 am EDT)
Location Stg Stg Day/Time Fri Sat Sun
Millstone River
Blackwells Mill 9.0 19.3 Thu 3 am EDT 18.0 8.5 3.4
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
Meola504
WGUS81 KPHI 021554
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
1154 AM EDT Thu Sep 2 2021
...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...Major
flooding is forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Additional information is available at www.weather.gov/phi.
NJC035-030400-
/O.CON.KPHI.FL.W.0049.000000T0000Z-210904T1000Z/
/BKWN4.3.ER.210902T0213Z.210902T1515Z.210904T0300Z.NR/
1154 AM EDT Thu Sep 2 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Millstone River At Blackwells Mills.
* Until Saturday morning.
* At 11:15 AM EDT Thursday the stage was 20.8 feet.
* Flood stage is 9.0 feet.
* Major flooding is occurring and major flooding is forecast. This
approaches the flood of record.
* Recent Activity...The maximum river stage in the 24 hours ending
at 11:15 AM EDT Thursday was 20.8 feet.
* Forecast...The river is expected to fall below flood stage late
tomorrow evening and continue falling to 3.2 feet Sunday morning.
* Impact...At 6.0 feet, The Griggstown Causway is closed due to
flooding.
* Impact...At 7.0 feet, Several more causways are closed due to
flooding.
* Impact...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.
* Impact...At 10.0 feet, The D&R Canal is flooded by the Millstone
River.
* Impact...At 13.0 feet, Washington Street and several businesses
are flooded.
* Flood History...This crest compares to a previous crest of 21.0
feet on 09/17/1999.
&&
Fld Observed Forecasts (2 pm EDT)
Location Stg Stg Day/Time Fri Sat Sun
Millstone River
Blackwells Mill 9.0 20.8 Thu 11 am ED 12.3 4.7 MSG
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
Kruzdlo759
WGUS81 KPHI 022054
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
454 PM EDT Thu Sep 2 2021
...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...Major
flooding is forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Additional information is available at www.weather.gov/phi.
NJC035-030900-
/O.CON.KPHI.FL.W.0049.000000T0000Z-210904T1000Z/
/BKWN4.3.ER.210902T0213Z.210902T1515Z.210904T0300Z.NR/
454 PM EDT Thu Sep 2 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Millstone River At Blackwells Mills.
* Until Saturday morning.
* At 4:15 PM EDT Thursday the stage was 20.3 feet.
* Flood stage is 9.0 feet.
* Major flooding is occurring and major flooding is forecast. This
approaches the flood of record.
* Recent Activity...The maximum river stage in the 24 hours ending
at 4:15 PM EDT Thursday was 20.8 feet.
* Forecast...The river is expected to fall below flood stage late
tomorrow evening and continue falling to 3.0 feet early Sunday
afternoon.
* Impact...At 6.0 feet, The Griggstown Causway is closed due to
flooding.
* Impact...At 7.0 feet, Several more causways are closed due to
flooding.
* Impact...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.
* Impact...At 10.0 feet, The D&R Canal is flooded by the Millstone
River.
* Impact...At 13.0 feet, Washington Street and several businesses
are flooded.
* Flood History...This crest compares to a previous crest of 21.0
feet on 09/17/1999.
&&
Fld Observed Forecasts (2 pm EDT)
Location Stg Stg Day/Time Fri Sat Sun
Millstone River
Blackwells Mill 9.0 20.3 Thu 4 pm EDT 12.3 4.7 3.0
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
Kruzdlo738
WGUS81 KPHI 030316
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
1116 PM EDT Thu Sep 2 2021
...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...Major
flooding is forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Additional information is available at www.weather.gov/phi.
NJC035-031530-
/O.EXT.KPHI.FL.W.0049.000000T0000Z-210904T0936Z/
/BKWN4.3.ER.210902T0213Z.210902T1515Z.210904T0336Z.NR/
1116 PM EDT Thu Sep 2 2021
...The Flood Warning is now in effect until early Saturday morning...
The Flood Warning continues for
the Millstone River At Blackwells Mills.
* Until late Friday night.
* At 10:15 PM EDT Thursday the stage was 18.3 feet.
* Flood stage is 9.0 feet.
* Major flooding is occurring and major flooding is forecast. This
approaches the flood of record.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:15 PM EDT Thursday was 20.8 feet.
* Forecast...The river is expected to fall below flood stage late
tomorrow evening and continue falling to 2.9 feet Sunday evening.
* Impact...At 6.0 feet, The Griggstown Causeway is closed due to
flooding.
* Impact...At 7.0 feet, Several more causeways are closed due to
flooding.
* Impact...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.
* Impact...At 10.0 feet, The D&R Canal is flooded by the Millstone
River.
* Impact...At 13.0 feet, Washington Street and several businesses
are flooded.
* Flood History...This crest compares to a previous crest of 18.7
feet on 08/28/1971.
&&
Fld Observed Forecasts (2 am EDT)
Location Stg Stg Day/Time Sat Sun Mon
Millstone River
Blackwells Mill 9.0 18.3 Thu 10 pm ED 8.2 3.4 MSG
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
Meola067
WGUS81 KPHI 030935
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
535 AM EDT Fri Sep 3 2021
...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...Moderate
flooding is forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Additional information is available at www.weather.gov/phi.
NJC035-032145-
/O.EXT.KPHI.FL.W.0049.000000T0000Z-210904T0700Z/
/BKWN4.3.ER.210902T0213Z.210902T1515Z.210904T0100Z.NR/
535 AM EDT Fri Sep 3 2021
...The Flood Warning is now in effect until late tonight...
The Flood Warning continues for
the Millstone River At Blackwells Mills.
* Until late tonight.
* At 5:15 AM EDT Friday the stage was 15.6 feet.
* Flood stage is 9.0 feet.
* Major flooding is occurring and moderate flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 5:15 AM EDT Friday was 20.8 feet.
* Forecast...The river is expected to fall below flood stage late
this evening and continue falling to 2.8 feet early Monday morning.
* Impact...At 6.0 feet, The Griggstown Causeway is closed due to
flooding.
* Impact...At 7.0 feet, Several more causeways are closed due to
flooding.
* Impact...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.
* Impact...At 10.0 feet, The D&R Canal is flooded by the Millstone
River.
* Impact...At 13.0 feet, Washington Street and several businesses
are flooded.
* Flood History...This crest compares to a previous crest of 15.5
feet on 10/20/1996.
&&
Fld Observed Forecasts (8 am EDT)
Location Stg Stg Day/Time Sat Sun Mon
Millstone River
Blackwells Mill 9.0 15.6 Fri 5 am EDT 5.7 3.2 MSG
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
Meola345
WGUS81 KPHI 031526
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
1126 AM EDT Fri Sep 3 2021
...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...Moderate
flooding is forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Additional information is available at www.weather.gov/phi.
NJC035-040330-
/O.CON.KPHI.FL.W.0049.000000T0000Z-210904T0700Z/
/BKWN4.3.ER.210902T0213Z.210902T1515Z.210904T0100Z.NR/
1126 AM EDT Fri Sep 3 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Millstone River At Blackwells Mills.
* Until late tonight.
* At 10:15 AM EDT Friday the stage was 13.7 feet.
* Flood stage is 9.0 feet.
* Moderate flooding is occurring and moderate flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending
at 10:15 AM EDT Friday was 20.8 feet.
* Forecast...The river is expected to fall below flood stage late
this evening and continue falling to 2.7 feet Monday morning.
* Impact...At 6.0 feet, The Griggstown Causway is closed due to
flooding.
* Impact...At 7.0 feet, Several more causways are closed due to
flooding.
* Impact...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.
* Impact...At 10.0 feet, The D&R Canal is flooded by the Millstone
River.
* Impact...At 13.0 feet, Washington Street and several businesses
are flooded.
* Flood History...This crest compares to a previous crest of 13.8
feet on 09/09/2011.
&&
Fld Observed Forecasts (2 pm EDT)
Location Stg Stg Day/Time Sat Sun Mon
Millstone River
Blackwells Mill 9.0 13.7 Fri 10 am ED 4.7 3.0 MSG
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
Kruzdlo297
WGUS81 KPHI 032016
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
416 PM EDT Fri Sep 3 2021
...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...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Additional information is available at www.weather.gov/phi.
NJC035-040700-
/O.CON.KPHI.FL.W.0049.000000T0000Z-210904T0700Z/
/BKWN4.2.ER.210902T0213Z.210902T1515Z.210904T0200Z.NR/
416 PM EDT Fri Sep 3 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Millstone River At Blackwells Mills.
* Until late tonight.
* At 3:15 PM EDT Friday the stage was 12.1 feet.
* Flood stage is 9.0 feet.
* Moderate flooding is occurring and minor flooding is forecast.
This approaches the flood of record.
* Recent Activity...The maximum river stage in the 24 hours ending
at 3:15 PM EDT Friday was 20.2 feet.
* Forecast...The river is expected to fall below flood stage late
this evening and continue falling to 2.7 feet early Monday
afternoon.
* Impact...At 6.0 feet, The Griggstown Causway is closed due to
flooding.
* Impact...At 7.0 feet, Several more causways are closed due to
flooding.
* Impact...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.
* Impact...At 10.0 feet, The D&R Canal is flooded by the Millstone
River.
* Impact...At 13.0 feet, Washington Street and several businesses
are flooded.
* Flood History...This crest compares to a previous crest of 12.1
feet on 08/19/1955.
&&
Fld Observed Forecasts (2 pm EDT)
Location Stg Stg Day/Time Sat Sun Mon
Millstone River
Blackwells Mill 9.0 12.1 Fri 3 pm EDT 4.7 3.0 2.7
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
Kruzdlo228
WGUS81 KPHI 040107
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
907 PM EDT Fri Sep 3 2021
...Forecast flooding changed from Minor to Moderate severity and
increased in duration for the following rivers in New Jersey...
Millstone River At Blackwells Mills affecting Somerset County.
For the Millstone River...including Blackwells Mills...Moderate
flooding is forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Additional information is available at www.weather.gov/phi.
NJC035-041315-
/O.EXT.KPHI.FL.W.0049.000000T0000Z-210904T1545Z/
/BKWN4.2.ER.210902T0213Z.210902T1515Z.210904T0945Z.NR/
907 PM EDT Fri Sep 3 2021
...Forecast flooding increased from Minor to Moderate severity and
increased in duration until late tomorrow morning...
The Flood Warning continues for
the Millstone River At Blackwells Mills.
* Until Saturday morning.
* At 8:15 PM EDT Friday the stage was 10.7 feet.
* Flood stage is 9.0 feet.
* Moderate flooding is occurring and moderate flooding is forecast.
The earlier crest approached the flood of record.
* Recent Activity...The maximum river stage in the 24 hours ending
at 8:15 PM EDT Friday was 18.7 feet.
* Forecast...The river is expected to fall below flood stage late
tonight and continue falling to 3.4 feet Monday evening.
* Impact...At 6.0 feet, The Griggstown Causeway is closed due to
flooding.
* Impact...At 7.0 feet, Several more causeways are closed due to
flooding.
* Impact...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.
* Impact...At 10.0 feet, The D&R Canal is flooded by the Millstone
River.
* Flood History...This crest compares to a previous crest of 10.8
feet on 06/10/1989.
&&
Fld Observed Forecasts (8 pm EDT)
Location Stg Stg Day/Time Sat Sun Mon
Millstone River
Blackwells Mill 9.0 10.7 Fri 8 pm EDT 5.9 4.2 3.4
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
SFJ314
WGUS81 KPHI 040941
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
541 AM EDT Sat Sep 4 2021
...The Flood Warning is cancelled for the following rivers in New
Jersey...
Millstone River At Blackwells Mills affecting Somerset County.
NJC035-041045-
/O.CAN.KPHI.FL.W.0049.000000T0000Z-210904T0941Z/
/BKWN4.2.ER.210902T0213Z.210902T1515Z.210904T0801Z.NR/
541 AM EDT Sat Sep 4 2021
...The Flood Warning for the Millstone River At Blackwells Mills has
been cancelled...
The Flood Warning is cancelled for
the Millstone River At Blackwells Mills.
* At 5:15 AM EDT Saturday the stage was 8.8 feet.
* Flood stage is 9.0 feet.
* Forecast...The river is expected to fall to 3.2 feet early Tuesday
morning.
&&
Fld Observed Forecasts (8 am EDT)
Location Stg Stg Day/Time Sun Mon Tue
Millstone River
Blackwells Mill 9.0 8.8 Sat 5 am EDT 4.7 3.7 MSG
&&
LAT...LON 4045 7463 4048 7461 4055 7460 4054 7453
4046 7454 4043 7456
$$
BAHThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 3:23 AM EDT | Gale Warning | PHI | 32 hr | |
| Sep 1, 3:23 AM EDT | Small Craft Advisory | PHI | 41 hr | |
| Sep 1, 4:34 AM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 39 hr |
| Sep 1, 7:58 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 47 min |
| Sep 1, 8:39 AM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 39 min |
| Sep 1, 9:11 AM EDT | Special Marine Warning | PHI | 64 min | |
| Sep 1, 11:24 AM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 3 hr |
| Sep 1, 4:04 PM EDT | Areal Flood Warning | PHI | Warren | 24 hr |
| Sep 1, 4:12 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 7 hr |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Morris, Somerset | 6 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 8 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 6 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Passaic | 21 days |
| Sep 1, 4:33 PM EDT | River Flood Warning | PHI | Morris, Passaic | 46 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Hunterdon, Somerset | 36 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Somerset | 22 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 42 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 48 hr |
| Sep 1, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer | 47 min |
| Sep 1, 5:26 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 9 hr |
| Sep 1, 5:33 PM EDT | Special Marine Warning | PHI | 27 min | |
| Sep 1, 5:34 PM EDT | Tornado Warning | PHI | Mercer | 26 min |
| Sep 1, 5:35 PM EDT | Tornado Warning | PHI | Cumberland, Salem | 25 min |
| Sep 1, 5:42 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Morris, Somerset, Warren | 10 hr |
| Sep 1, 5:57 PM EDT | Tornado Warning | PHI | Gloucester, Salem | 33 min |
| Sep 1, 5:57 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer, Somerset | 33 min |
| Sep 1, 6:05 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 10 hr |
| Sep 1, 6:08 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 6 hr |
| Sep 1, 6:14 PM EDT | Special Marine Warning | PHI | 61 min | |
| Sep 1, 6:20 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer, Somerset | 40 min |
| Sep 1, 6:22 PM EDT | Tornado Warning | PHI | Burlington, Camden, Gloucester | 23 min |
| Sep 1, 6:42 PM EDT | Tornado Warning | PHI | Burlington, Camden | 33 min |
| Sep 1, 6:59 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset | 61 min |
| Sep 1, 7:04 PM EDT | Tornado Warning | PHI | Burlington, Mercer | 26 min |
| Sep 1, 7:22 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer | 11 min |
| Sep 1, 7:28 PM EDT | Tornado Warning | PHI | Mercer, Middlesex, Morris, Somerset | 47 min |
| Sep 1, 7:31 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Somerset | 4 hr |
| Sep 1, 7:44 PM EDT | Special Marine Warning | PHI | 61 min |
Nearby
River Flood Warnings in New Jersey, 2021Every river flood warning in 2021
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.