Alert archive / Pennsylvania / River Flood Warnings in 2021

River Flood Warning 39, NWS Philadelphia/Mount Holly

September 1, 2021Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Sep 1, 2021, 4:21 PM EDT for Bucks County, Pennsylvania. It took effect at Sep 1, 2021, 9:46 PM EDT. It was in force for 24 hr.

The area

The outline as issued.

The facts

Issued: Sep 1, 2021, 4:21 PM EDT (20:21 UTC)
In effect from: Sep 1, 2021, 9:46 PM EDT
Expired: Sep 2, 2021, 9:16 PM EDT
In force: 24 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: Major

County Bucks County, PA

The radar

The Philadelphia radar (KDIX), 49 km from the middle of the area, began a volume at 20:25 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 Neshaminy Creek near Langhorne (LNGP1). The gauge peaked at 20.79 ft at Sep 2, 2021, 7:00 AM EDT.

Action stage: 8 ft
Minor stage: 9 ft
Moderate stage: 12 ft
Major stage: 14 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01465500, 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.

947 
WGUS41 KPHI 012021
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
421 PM EDT Wed Sep 1 2021

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

  Neshaminy Creek At Langhorne affecting Bucks County.

For the Neshaminy Creek...including Langhorne...Major 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.


PAC017-020830-
/O.NEW.KPHI.FL.W.0039.210902T0200Z-210903T0058Z/
/LNGP1.3.ER.210902T0200Z.210902T1200Z.210902T1857Z.NO/
421 PM EDT Wed Sep 1 2021

The National Weather Service in Mount Holly has issued a

* Flood Warning for
  the Neshaminy Creek At Langhorne.
* From this evening to Thursday evening.
* At 3:15 PM EDT Wednesday the stage was 1.5 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 15.0 feet tomorrow morning. It will 
  then fall below flood stage early tomorrow afternoon.
* Impact...At 7.0 feet, Water begins to overflow the lowest banks, 
  on both sides of the creek, into adjacent wooded areas.
* Impact...At 9.0 feet, Flooding begins on Bridle Drive in 
  Middletown Township.
* Impact...At 10.5 feet, Route 413, near Bridgeton Pike in 
  Middletown Township, is subject to closures due to flooding.
* Impact...At 12.0 feet, Widespread flooding occurs on Bridle Drive 
  in Middletown Township. The road becomes impassable.
* Impact...At 13.0 feet, Periwinkle Drive in Middletown Township 
  begins to flood. Flooding in also possible further downstream in 
  the Croyden Section of Bristol Township, especially when the 
  Delaware River tides are high.
* Impact...At 14.0 feet, Residential properties are flooded on 
  Bridle Drive in Middletown Township. Flooding also occurs on 
  Business US 1 in Middletown Township near Rising Sun Avenue. 
  Flooding is also possible further downstream in the Croydon 
  Section of Bristol Township, especially when the Delaware River 
  tides are high.
* Flood History...This crest compares to a previous crest of 15.0 
  feet on 11/09/1972.

&&


               Fld   Observed           Forecasts (2 pm EDT)     
Location       Stg   Stg   Day/Time     Thu   Fri   Sat          

Neshaminy Creek
Langhorne      9.0   1.5   Wed 3 pm EDT 9.4   4.2   3.2          





&&

LAT...LON 4019 7498 4020 7491 4008 7486 4006 7493

$$

Kruzdlo

5 follow-up statements

254 
WGUS81 KPHI 020146
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
946 PM EDT Wed Sep 1 2021

...The Flood Warning is extended for the following rivers in 
Pennsylvania...

  Neshaminy Creek At Langhorne affecting Bucks County.

For the Neshaminy Creek...including Langhorne...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.


PAC017-021400-
/O.EXT.KPHI.FL.W.0039.210902T0146Z-210903T1221Z/
/LNGP1.3.ER.210902T0019Z.210902T0600Z.210903T0621Z.NO/
946 PM EDT Wed Sep 1 2021

...The Flood Warning is now in effect until Friday morning...

The Flood Warning continues for
  the Neshaminy Creek At Langhorne.
* From this evening to Friday morning.
* At 9:15 PM EDT Wednesday the stage was 11.8 feet.
* Flood stage is 9.0 feet.
* Minor flooding is occurring and major flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 9:15 PM EDT Wednesday was 11.8 feet.
* Forecast...The river is expected to rise to a crest of 18.6 feet 
  just after midnight tonight. It will then fall below flood stage 
  early Friday morning.
* Impact...At 7.0 feet, Water begins to overflow the lowest banks, 
  on both sides of the creek, into adjacent wooded areas.
* Impact...At 9.0 feet, Flooding begins on Bridle Drive in 
  Middletown Township.
* Impact...At 10.5 feet, Route 413, near Bridgeton Pike in 
  Middletown Township, is subject to closures due to flooding.
* Impact...At 12.0 feet, Widespread flooding occurs on Bridle Drive 
  in Middletown Township. The road becomes impassable.
* Impact...At 13.0 feet, Periwinkle Drive in Middletown Township 
  begins to flood. Flooding in also possible further downstream in 
  the Croyden Section of Bristol Township, especially when the 
  Delaware River tides are high.
* Impact...At 14.0 feet, Residential properties are flooded on 
  Bridle Drive in Middletown Township. Flooding also occurs on 
  Business US 1 in Middletown Township near Rising Sun Avenue. 
  Flooding is also possible further downstream in the Croydon 
  Section of Bristol Township, especially when the Delaware River 
  tides are high.
* Flood History...This crest compares to a previous crest of 19.0 
  feet on 06/30/1973.

&&


               Fld   Observed           Forecasts (8 pm EDT)     
Location       Stg   Stg   Day/Time     Thu   Fri   Sat          

Neshaminy Creek
Langhorne      9.0   11.8  Wed 9 pm EDT 11.5  5.8   4.2          





&&

LAT...LON 4019 7498 4020 7491 4008 7486 4006 7493

$$

Meola

907 
WGUS81 KPHI 020719
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
319 AM EDT Thu Sep 2 2021

...The Flood Warning continues for the following rivers in 
Pennsylvania...

  Neshaminy Creek At Langhorne affecting Bucks County.

For the Neshaminy Creek...including Langhorne...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.


PAC017-021930-
/O.EXT.KPHI.FL.W.0039.000000T0000Z-210903T0547Z/
/LNGP1.3.ER.210902T0019Z.210902T1200Z.210902T2347Z.NO/
319 AM EDT Thu Sep 2 2021

...The Flood Warning is now in effect until just after midnight 
tonight...

The Flood Warning continues for
  the Neshaminy Creek At Langhorne.
* Until late tonight.
* At 2:15 AM EDT Thursday the stage was 18.4 feet.
* Flood stage is 9.0 feet.
* Major flooding is occurring and major flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 2:15 AM EDT Thursday was 18.4 feet.
* Forecast...The river is expected to rise to a crest of 20.3 feet 
  this morning. It will then fall below flood stage this evening.
* Impact...At 7.0 feet, Water begins to overflow the lowest banks, 
  on both sides of the creek, into adjacent wooded areas.
* Impact...At 9.0 feet, Flooding begins on Bridle Drive in 
  Middletown Township.
* Impact...At 10.5 feet, Route 413, near Bridgeton Pike in 
  Middletown Township, is subject to closures due to flooding.
* Impact...At 12.0 feet, Widespread flooding occurs on Bridle Drive 
  in Middletown Township. The road becomes impassable.
* Impact...At 13.0 feet, Periwinkle Drive in Middletown Township 
  begins to flood. Flooding in also possible further downstream in 
  the Croyden Section of Bristol Township, especially when the 
  Delaware River tides are high.
* Impact...At 14.0 feet, Residential properties are flooded on 
  Bridle Drive in Middletown Township. Flooding also occurs on 
  Business US 1 in Middletown Township near Rising Sun Avenue. 
  Flooding is also possible further downstream in the Croydon 
  Section of Bristol Township, especially when the Delaware River 
  tides are high.
* Flood History...This crest compares to a previous crest of 19.6 
  feet on 08/28/2011.

&&


               Fld   Observed           Forecasts (2 am EDT)     
Location       Stg   Stg   Day/Time     Fri   Sat   Sun          

Neshaminy Creek
Langhorne      9.0   18.4  Thu 2 am EDT 7.1   4.4   3.5          





&&

LAT...LON 4019 7498 4020 7491 4008 7486 4006 7493

$$

CMS

240 
WGUS81 KPHI 021526
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
1126 AM EDT Thu Sep 2 2021

...The Flood Warning continues for the following rivers in 
Pennsylvania...

  Neshaminy Creek At Langhorne affecting Bucks County.

For the Neshaminy Creek...including Langhorne...Major 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.


PAC017-030330-
/O.CON.KPHI.FL.W.0039.000000T0000Z-210903T0547Z/
/LNGP1.3.ER.210902T0019Z.210902T1030Z.210903T0400Z.NO/
1126 AM EDT Thu Sep 2 2021

...The Flood Warning remains in effect...

The Flood Warning continues for
  the Neshaminy Creek At Langhorne.
* Until late tonight.
* At 10:15 AM EDT Thursday the stage was 19.4 feet.
* Flood stage is 9.0 feet.
* Major flooding is occurring and major flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 10:15 AM EDT Thursday was 20.8 feet.
* Forecast...The river is expected to fall below flood stage just 
  after midnight tonight and continue falling to 3.4 feet Sunday 
  morning.
* Impact...At 7.0 feet, Water begins to overflow the lowest banks, 
  on both sides of the creek, into adjacent wooded areas.
* Impact...At 9.0 feet, Flooding begins on Bridle Drive in 
  Middletown Township.
* Impact...At 10.5 feet, Route 413, near Bridgeton Pike in 
  Middletown Township, is subject to closures due to flooding.
* Impact...At 12.0 feet, Widespread flooding occurs on Bridle Drive 
  in Middletown Township. The road becomes impassable.
* Impact...At 13.0 feet, Periwinkle Drive in Middletown Township 
  begins to flood. Flooding in also possible further downstream in 
  the Croyden Section of Bristol Township, especially when the 
  Delaware River tides are high.
* Impact...At 14.0 feet, Residential properties are flooded on 
  Bridle Drive in Middletown Township. Flooding also occurs on 
  Business US 1 in Middletown Township near Rising Sun Avenue. 
  Flooding is also possible further downstream in the Croydon 
  Section of Bristol Township, especially when the Delaware River 
  tides are high.
* Flood History...This crest compares to a previous crest of 19.6 
  feet on 08/28/2011.

&&


               Fld   Observed           Forecasts (2 pm EDT)     
Location       Stg   Stg   Day/Time     Fri   Sat   Sun          

Neshaminy Creek
Langhorne      9.0   19.4  Thu 10 am ED 5.6   3.9   MSG          





&&

LAT...LON 4019 7498 4020 7491 4008 7486 4006 7493

$$

Kruzdlo

028 
WGUS81 KPHI 022025
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
425 PM EDT Thu Sep 2 2021

...The Flood Warning continues for the following rivers in 
Pennsylvania...

  Neshaminy Creek At Langhorne affecting Bucks County.

For the Neshaminy Creek...including Langhorne...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.


PAC017-030600-
/O.CON.KPHI.FL.W.0039.000000T0000Z-210903T0547Z/
/LNGP1.3.ER.210902T0019Z.210902T1030Z.210903T0300Z.NO/
425 PM EDT Thu Sep 2 2021

...The Flood Warning remains in effect...

The Flood Warning continues for
  the Neshaminy Creek At Langhorne.
* Until late tonight.
* At 3:15 PM EDT Thursday the stage was 14.1 feet.
* Flood stage is 9.0 feet.
* Major flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 3:15 PM EDT Thursday was 20.8 feet.
* Forecast...The river is expected to fall below flood stage late 
  this evening and continue falling to 3.2 feet early Sunday 
  afternoon.
* Impact...At 7.0 feet, Water begins to overflow the lowest banks, 
  on both sides of the creek, into adjacent wooded areas.
* Impact...At 9.0 feet, Flooding begins on Bridle Drive in 
  Middletown Township.
* Impact...At 10.5 feet, Route 413, near Bridgeton Pike in 
  Middletown Township, is subject to closures due to flooding.
* Impact...At 12.0 feet, Widespread flooding occurs on Bridle Drive 
  in Middletown Township. The road becomes impassable.
* Impact...At 13.0 feet, Periwinkle Drive in Middletown Township 
  begins to flood. Flooding in also possible further downstream in 
  the Croyden Section of Bristol Township, especially when the 
  Delaware River tides are high.
* Impact...At 14.0 feet, Residential properties are flooded on 
  Bridle Drive in Middletown Township. Flooding also occurs on 
  Business US 1 in Middletown Township near Rising Sun Avenue. 
  Flooding is also possible further downstream in the Croydon 
  Section of Bristol Township, especially when the Delaware River 
  tides are high.
* Flood History...This crest compares to a previous crest of 14.0 
  feet on 12/11/2003.

&&


               Fld   Observed           Forecasts (2 pm EDT)     
Location       Stg   Stg   Day/Time     Fri   Sat   Sun          

Neshaminy Creek
Langhorne      9.0   14.1  Thu 3 pm EDT 5.6   3.9   3.2          





&&

LAT...LON 4019 7498 4020 7491 4008 7486 4006 7493

$$

Kruzdlo

422 
WGUS81 KPHI 030116
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
916 PM EDT Thu Sep 2 2021

...The Flood Warning is cancelled for the following rivers in 
Pennsylvania...

  Neshaminy Creek At Langhorne affecting Bucks County.

PAC017-030230-
/O.CAN.KPHI.FL.W.0039.000000T0000Z-210903T0116Z/
/LNGP1.3.ER.210902T0019Z.210902T1030Z.210902T2143Z.NO/
916 PM EDT Thu Sep 2 2021

...The Flood Warning for the Neshaminy Creek At Langhorne has been 
cancelled...

The Flood Warning is cancelled for
  the Neshaminy Creek At Langhorne.
* At 8:15 PM EDT Thursday the stage was 7.2 feet.
* Flood stage is 9.0 feet.
* Forecast...The river is expected to fall to 3.2 feet Sunday 
  evening.

&&


               Fld   Observed           Forecasts (8 pm EDT)     
Location       Stg   Stg   Day/Time     Fri   Sat   Sun          

Neshaminy Creek
Langhorne      9.0   7.2   Thu 8 pm EDT 4.7   3.7   3.2          





&&

LAT...LON 4019 7498 4020 7491 4008 7486 4006 7493

$$

PO

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 6:19 AM EDT	Areal Flood Advisory	PHI	Chester, Delaware	116 min
Sep 1, 6:49 AM EDT	Flash Flood Warning	PHI	Chester, Delaware, Philadelphia	86 min
Sep 1, 11:24 AM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	3 hr
Sep 1, 12:07 PM EDT	Flash Flood Warning	PHI	Carbon, Monroe	4 hr
Sep 1, 1:29 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh	6 hr
Sep 1, 2:53 PM EDT	Flash Flood Warning	PHI	Berks, Chester, Delaware, Montgomery	9 hr
Sep 1, 3:55 PM EDT	River Flood Warning	PHI	Montgomery	36 hr
Sep 1, 3:55 PM EDT	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	43 hr
Sep 1, 3:55 PM EDT	River Flood Warning	PHI	Montgomery, Philadelphia	41 hr
Sep 1, 3:55 PM EDT	River Flood Warning	PHI	Philadelphia	39 hr
Sep 1, 3:55 PM EDT	River Flood Warning	PHI	Berks	24 hr
Sep 1, 4:02 PM EDT	River Flood Warning	PHI	Monroe	24 hr
Sep 1, 4:04 PM EDT	Areal Flood Warning	PHI	Carbon, Monroe, Northampton	24 hr
Sep 1, 4:10 PM EDT	River Flood Warning	PHI	Monroe	19 hr
Sep 1, 4:12 PM EDT	Flash Flood Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	7 hr
Sep 1, 4:12 PM EDT	River Flood Warning	PHI	Lehigh, Northampton	25 hr
Sep 1, 4:12 PM EDT	River Flood Warning	PHI	Lehigh, Northampton	24 hr
Sep 1, 4:12 PM EDT	River Flood Warning	PHI	Carbon	15 hr
Sep 1, 4:13 PM EDT	Tornado Warning	PHI	Chester	32 min
Sep 1, 4:20 PM EDT	River Flood Warning	PHI	Montgomery	22 hr
Sep 1, 4:42 PM EDT	Flash Flood Warning EmergencyConsiderable damage threat	PHI	Chester, Delaware, Montgomery	6 hr
Sep 1, 5:07 PM EDT	River Flood Warning	PHI	Chester	17 hr
Sep 1, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	47 min
Sep 1, 5:15 PM EDT	Tornado Warning	PHI	Delaware, Montgomery, Philadelphia	30 min
Sep 1, 5:26 PM EDT	Flash Flood Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	9 hr
Sep 1, 5:34 PM EDT	Tornado Warning	PHI	Bucks, Montgomery, Philadelphia	26 min
Sep 1, 5:42 PM EDT	Flash Flood Warning	PHI	Bucks	10 hr
Sep 1, 5:57 PM EDT	Tornado Warning	PHI	Bucks	33 min
Sep 1, 6:08 PM EDT	Flash Flood Warning	PHI	Monroe, Northampton	6 hr
Sep 1, 6:20 PM EDT	Tornado Warning	PHI	Bucks	40 min
Sep 1, 6:22 PM EDT	Tornado Warning Tornado observed	PHI	Philadelphia	23 min
Sep 1, 6:38 PM EDT	River Flood Warning	PHI	Chester, Delaware	26 hr
Sep 1, 6:42 PM EDT	Tornado Warning	PHI	Bucks, Philadelphia	33 min
Sep 1, 6:59 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	61 min
Sep 1, 7:04 PM EDT	Tornado Warning EmergencyTornado observedCatastrophic damage threat	PHI	Bucks	26 min
Sep 1, 7:05 PM EDT	Flash Flood Warning EmergencyCatastrophic damage threat	PHI	Bucks	8 hr
Sep 1, 7:22 PM EDT	Tornado Warning	PHI	Bucks	11 min
Sep 1, 7:23 PM EDT	Areal Flood Warning	PHI	Berks, Lehigh	14 hr
Sep 1, 7:31 PM EDT	Flash Flood Warning EmergencyCatastrophic damage threat	PHI	Bucks	4 hr
Sep 1, 7:53 PM EDT	River Flood Warning	PHI	Delaware	13 hr

Nearby

River Flood Warnings in Pennsylvania, 2021 Every 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.