Alert archive / New Jersey / River Flood Warnings in 2025
River Flood Warning 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this river flood warning at May 31, 2025, 6:20 PM EDT for Morris County, New Jersey. It took effect at May 31, 2025, 8:00 PM EDT. It was in force for 11 hr.
The area
The outline as issued.
The facts
- Issued
- May 31, 2025, 6:20 PM EDT (22:20 UTC)
- In effect from
- May 31, 2025, 8:00 PM EDT
- Expired
- Jun 1, 2025, 6:39 AM EDT
- In force
- 11 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- Minor
County Morris County, NJ
The radar
The Philadelphia radar (KDIX), 103 km from the middle of the area, began a volume at 22:24 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 Rockaway River at Boonton below reservoir (BONN4). The gauge peaked at 5.03 ft at Jun 1, 2025, 1:00 AM EDT.
- Action stage
- 4.5 ft
- Minor stage
- 5 ft
- Moderate stage
- 7 ft
- Major stage
- 8 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 01381000, 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.
008
WGUS41 KPHI 312220
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
620 PM EDT Sat May 31 2025
...The National Weather Service in Mount Holly NJ has issued a Flood
Warning for the following rivers in New Jersey...
Rockaway River At Boonton Below Resvr affecting Morris County.
For the Rockaway River...including Boonton Above Resvr, Boonton
Below Resvr...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 800 AM EDT.
&&
NJC027-011200-
/O.NEW.KPHI.FL.W.0003.250601T0000Z-250601T1200Z/
/BONN4.1.ER.250601T0600Z.250601T0600Z.250601T0600Z.NO/
620 PM EDT Sat May 31 2025
...FLOOD WARNING IN EFFECT UNTIL TOMORROW MORNING...
* WHAT...Minor flooding is forecast.
* WHERE...Rockaway River at Boonton Below Resvr.
* WHEN...Until tomorrow morning.
* IMPACTS...At 6.0 feet, Flooding occurs on Vail Road in Montville.
The Road heading into Parsippany is subject to closures.
* ADDITIONAL DETAILS...
- At 6:00 PM EDT Saturday the stage was 4.6 feet.
- Forecast...The river is expected to rise to a crest of 5.0
feet just after midnight tonight.
- Flood stage is 5.0 feet.
- Flood History...This crest compares to a previous crest of
5.0 feet on 12/01/2020.
- http://www.weather.gov/safety/flood
&&
Fld Observed Forecasts (8 pm EDT)
Location Stg Stg Day/Time Sun Mon Tue
Rockaway River
Boonton Below Resv 5.0 4.6 Sat 6 pm EDT 4.4 3.8 MSG
&&
LAT...LON 4087 7443 4092 7438 4087 7430 4082 7436
$$
Staarmann2 follow-up statements
672
WGUS81 KPHI 010420
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
1220 AM EDT Sun Jun 1 2025
...The Flood Warning continues for the following rivers in New
Jersey...
Rockaway River At Boonton Below Resvr affecting Morris County.
For the Rockaway River...including Boonton Below Resvr...Minor
flooding is forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Additional information is available at www.weather.gov/phi.
The next statement will be issued this morning at 800 AM EDT.
&&
NJC027-011200-
/O.CON.KPHI.FL.W.0003.000000T0000Z-250601T1200Z/
/BONN4.1.ER.250601T0330Z.250601T0400Z.250601T0600Z.NO/
1220 AM EDT Sun Jun 1 2025
...FLOOD WARNING REMAINS IN EFFECT UNTIL THIS MORNING...
* WHAT...Minor flooding is occurring.
* WHERE...Rockaway River at Boonton Below Resvr.
* WHEN...Until this morning.
* IMPACTS...At 6.0 feet, Flooding occurs on Vail Road in Montville.
The Road heading into Parsippany is subject to closures.
* ADDITIONAL DETAILS...
- At 12:00 AM EDT Sunday the stage was 5.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 12:00 AM EDT Sunday was 5.0 feet.
- Forecast...The river is expected to fall below flood stage
early this morning and continue falling to 3.6 feet early
Tuesday afternoon.
- Flood stage is 5.0 feet.
- Flood History...This crest compares to a previous crest of
5.0 feet on 12/01/2020.
- http://www.weather.gov/safety/flood
&&
Fld Observed Forecasts (2 am EDT)
Location Stg Stg Day/Time Mon Tue Wed
Rockaway River
Boonton Below Resv 5.0 5.0 Sun 12 am EDT 4.2 3.7 MSG
&&
LAT...LON 4087 7443 4092 7438 4087 7430 4082 7436
$$
AKL662
WGUS81 KPHI 011039
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
639 AM EDT Sun Jun 1 2025
...The Flood Warning is cancelled for the following rivers in New
Jersey...
Rockaway River At Boonton Below Resvr affecting Morris County.
NJC027-011145-
/O.CAN.KPHI.FL.W.0003.000000T0000Z-250601T1039Z/
/BONN4.1.ER.250601T0330Z.250601T0615Z.250601T0845Z.NO/
639 AM EDT Sun Jun 1 2025
...FLOOD WARNING IS CANCELLED...
The Flood Warning is cancelled for
the Rockaway River At Boonton Below Resvr.
* ADDITIONAL DETAILS...
- At 6:00 AM EDT Sunday the stage was 4.95 feet.
- Forecast...The river is expected to fall to 3.6 feet early
Tuesday afternoon.
- http://www.weather.gov/safety/flood
&&
Fld Observed Forecasts (8 am EDT)
Location Stg Stg Day/Time Mon Tue Wed
Rockaway River
Boonton Below Resv 5.0 4.95 Sun 6 am EDT 4.0 3.6 MSG
&&
LAT...LON 4087 7443 4092 7438 4087 7430 4082 7436
$$
AKLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 9:04 PM EDT | Wind Advisory | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 10 hr |
| May 30, 11:12 PM EDT | Flash Flood Warning | PHI | Gloucester, Salem | 3 hr |
| May 30, 11:36 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| May 31, 12:34 AM EDT | Flash Flood Warning | PHI | Burlington, Mercer | 3 hr |
| May 31, 4:00 AM EDT | Areal Flood Warning | PHI | Morris, Sussex, Warren | 9 hr |
| May 31, 4:19 AM EDT | Areal Flood Warning | PHI | Hunterdon | 6 hr |
| May 31, 5:13 AM EDT | Areal Flood Warning | PHI | Somerset | 97 min |
| May 31, 8:46 AM EDT | Areal Flood Warning | PHI | Somerset | 7 hr |
| May 31, 2:12 PM EDT | Special Marine Warning | PHI | 63 min | |
| May 31, 3:10 PM EDT | Special Marine Warning | PHI | 65 min | |
| May 31, 3:14 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 16 min |
| May 31, 4:51 PM EDT | Special Marine Warning | PHI | 84 min | |
| May 31, 5:04 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Gloucester, Salem | 41 min |
Nearby
River Flood Warnings in New Jersey, 2025Every river flood warning in 2025
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.