Alert archive / Pennsylvania / River Flood Warnings in 2021

River Flood Warning 72, NWS Philadelphia/Mount Holly

September 2, 2021Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Sep 2, 2021, 5:02 AM EDT for Lehigh County, Pennsylvania. It was in force for 11 hr.

The area

The outline as issued.

The facts

Issued: Sep 2, 2021, 5:02 AM EDT (09:02 UTC)
Expired: Sep 2, 2021, 4:21 PM EDT
In force: 11 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: Minor

County Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 119 km from the middle of the area, began a volume at 09:01 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 Jordan Creek at Allentown (ALNP1). The gauge peaked at 10.71 ft at Sep 2, 2021, 8:00 AM EDT.

Action stage: 6 ft
Minor stage: 8 ft
Moderate stage: 10 ft
Major stage: 11 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01452000, 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.

500 
WGUS41 KPHI 020902
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
502 AM EDT Thu Sep 2 2021

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

  Jordan Creek At Allentown affecting Lehigh County.

For the Jordan Creek...including Allentown...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.


PAC077-022115-
/O.NEW.KPHI.FL.W.0072.210902T0902Z-210903T0016Z/
/ALNP1.1.ER.210902T0827Z.210902T1200Z.210902T1815Z.NO/
502 AM EDT Thu Sep 2 2021

The National Weather Service in Mount Holly has issued a

* Flood Warning for
  the Jordan Creek At Allentown.
* From early this morning to this evening.
* At 4:45 AM EDT Thursday the stage was 8.3 feet.
* Flood stage is 8.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 4:45 AM EDT Thursday was 8.3 feet.
* Forecast...The river will oscillate around flood stage with a 
  maximum value of 9.0 feet this morning.
* Impact...At 6.0 feet, Jordan Park begins to flood.
* Impact...At 6.5 feet, Covered Bridge Park begins to flood. 
  Playground equipment and athletic fields at Jordan Park are 
  submerged.
* Impact...At 7.1 feet, Route 309 in Whithall Township is closed due 
  to flooding.
* Impact...At 8.0 feet, Village Road in South whitehall is flooded.
* Flood History...This crest compares to a previous crest of 8.0 
  feet on 10/19/1996.

&&


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

Jordan Creek
Allentown   8.0   8.3   Thu 4 am EDT 6.1   4.0   MSG          





&&

LAT...LON 4062 7553 4066 7551 4062 7544 4058 7547

$$

Kruzdlo

4 follow-up statements

775 
WGUS41 KPHI 021024
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
624 AM EDT Thu Sep 2 2021

...Forecast flooding changed from Minor to Moderate severity and 
increased in duration for the following rivers in Pennsylvania...

  Jordan Creek At Allentown affecting Lehigh County.

For the Jordan Creek...including Allentown...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.


PAC077-022230-
/O.EXT.KPHI.FL.W.0072.000000T0000Z-210903T0300Z/
/ALNP1.2.ER.210902T0827Z.210902T1200Z.210902T2100Z.NO/
624 AM EDT Thu Sep 2 2021

...Forecast flooding increased from Minor to Moderate severity and 
increased in duration until late this evening...

The Flood Warning continues for
  the Jordan Creek At Allentown.
* Until this evening.
* At 6:00 AM EDT Thursday the stage was 9.5 feet.
* Flood stage is 8.0 feet.
* Minor flooding is occurring and moderate flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 6:00 AM EDT Thursday was 9.5 feet.
* Forecast...The river will oscillate around flood stage with a 
  maximum value of 10.1 feet this morning.
* Impact...At 6.0 feet, Jordan Park begins to flood.
* Impact...At 6.5 feet, Covered Bridge Park begins to flood. 
  Playground equipment and athletic fields at Jordan Park are 
  submerged.
* Impact...At 7.1 feet, Route 309 in Whithall Township is closed due 
  to flooding.
* Impact...At 8.0 feet, Village Road in South whitehall is flooded.
* Flood History...This crest compares to a previous crest of 10.9 
  feet on 09/09/1987.

&&


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

Jordan Creek
Allentown   8.0   9.5   Thu 6 am EDT 6.1   4.0   MSG          





&&

LAT...LON 4062 7553 4066 7551 4062 7544 4058 7547

$$

Kruzdlo

201 
WGUS81 KPHI 021226
FLSPHI

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

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

  Jordan Creek At Allentown affecting Lehigh County.

For the Jordan Creek...including Allentown...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.


PAC077-030030-
/O.CON.KPHI.FL.W.0072.000000T0000Z-210903T0300Z/
/ALNP1.2.ER.210902T0827Z.210902T1400Z.210903T1000Z.NR/
826 AM EDT Thu Sep 2 2021

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

The Flood Warning continues for
  the Jordan Creek At Allentown.
* Until this evening.
* At 8:15 AM EDT Thursday the stage was 10.7 feet.
* Flood stage is 8.0 feet.
* Moderate flooding is occurring and moderate flooding is forecast. 
  This approaches the flood of record.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 8:15 AM EDT Thursday was 10.7 feet.
* Forecast...The river will oscillate around flood stage with a 
  maximum value of 10.9 feet late this morning.
* Impact...At 6.0 feet, Jordan Park begins to flood.
* Impact...At 6.5 feet, Covered Bridge Park begins to flood. 
  Playground equipment and athletic fields at Jordan Park are 
  submerged.
* Impact...At 7.1 feet, Route 309 in Whithall Township is closed due 
  to flooding.
* Impact...At 8.0 feet, Village Road in South whitehall is flooded.
* Flood History...This crest compares to a previous crest of 10.9 
  feet on 09/09/1987.

&&


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

Jordan Creek
Allentown   8.0   10.7  Thu 8 am EDT 7.7   5.2   MSG          





&&

LAT...LON 4062 7553 4066 7551 4062 7544 4058 7547

$$

Kruzdlo

179 
WGUS81 KPHI 021519
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
1119 AM EDT Thu Sep 2 2021

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

  Jordan Creek At Allentown affecting Lehigh County.

For the Jordan Creek...including Allentown...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.


PAC077-030300-
/O.CON.KPHI.FL.W.0072.000000T0000Z-210903T0300Z/
/ALNP1.2.ER.210902T0827Z.210902T1230Z.210903T1000Z.NO/
1119 AM EDT Thu Sep 2 2021

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

The Flood Warning continues for
  the Jordan Creek At Allentown.
* Until this evening.
* At 11:00 AM EDT Thursday the stage was 9.5 feet.
* Flood stage is 8.0 feet.
* Minor flooding is occurring and moderate flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 11:00 AM EDT Thursday was 10.7 feet.
* Forecast...The river will oscillate around flood stage with a 
  maximum value of 10.5 feet this afternoon.
* Impact...At 6.0 feet, Jordan Park begins to flood.
* Impact...At 6.5 feet, Covered Bridge Park begins to flood. 
  Playground equipment and athletic fields at Jordan Park are 
  submerged.
* Impact...At 7.1 feet, Route 309 in Whithall Township is closed due 
  to flooding.
* Impact...At 8.0 feet, Village Road in South whitehall is flooded.
* Flood History...This crest compares to a previous crest of 10.9 
  feet on 09/09/1987.

&&


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

Jordan Creek
Allentown   8.0   9.5   Thu 11 am ED 5.6   2.7   MSG          





&&

LAT...LON 4062 7553 4066 7551 4062 7544 4058 7547

$$

Kruzdlo

987 
WGUS81 KPHI 022021
FLSPHI

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

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

  Jordan Creek At Allentown affecting Lehigh County.

PAC077-022130-
/O.CAN.KPHI.FL.W.0072.000000T0000Z-210902T2021Z/
/ALNP1.2.ER.210902T0827Z.210902T1230Z.210903T1000Z.NO/
421 PM EDT Thu Sep 2 2021

...The Flood Warning for the Jordan Creek At Allentown has been 
cancelled...

The Flood Warning is cancelled for
  the Jordan Creek At Allentown.
* At 4:00 PM EDT Thursday the stage was 6.9 feet.
* Flood stage is 8.0 feet.
* Forecast...The river will continue to fall this evening.

&&


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

Jordan Creek
Allentown   8.0   6.9   Thu 4 pm EDT 3.8   2.7   2.6          





&&

LAT...LON 4062 7553 4066 7551 4062 7544 4058 7547

$$

Kruzdlo

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 8:29 PM EDT	River Flood Warning	PHI	Lehigh	10 hr
Sep 1, 9:47 PM EDT	River Flood Warning	PHI	Berks	18 hr
Sep 1, 10:24 PM EDT	Flash Flood Warning	PHI	Bucks, Philadelphia	4 hr
Sep 1, 10:29 PM EDT	River Flood Warning	PHI	Bucks	49 hr
Sep 1, 10:32 PM EDT	River Flood Warning	PHI	Bucks	31 hr
Sep 1, 10:42 PM EDT	Areal Flood Warning	PHI	Berks, Bucks, Montgomery	12 hr
Sep 1, 10:47 PM EDT	Areal Flood Warning	PHI	Bucks, Carbon, Lehigh, Northampton	23 hr
Sep 1, 10:52 PM EDT	Areal Flood Warning	PHI	Bucks	12 hr
Sep 1, 11:38 PM EDT	Areal Flood Warning	PHI	Berks, Chester, Delaware, Montgomery	10 hr
Sep 2, 12:01 AM EDT	Areal Flood Warning	PHI	Monroe, Northampton	40 hr
Sep 2, 2:23 AM EDT	Areal Flood Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	9 hr
Sep 2, 2:29 AM EDT	Areal Flood Warning	PHI	Bucks, Philadelphia	5 hr
Sep 2, 2:41 AM EDT	Areal Flood Warning	PHI	Bucks	14 hr
Sep 2, 3:52 AM EDT	Areal Flood Warning	PHI	Bucks	8 hr
Sep 2, 4:45 AM EDT	River Flood Warning	PHI	Bucks	37 hr
Sep 2, 4:45 AM EDT	River Flood Warning	PHI	Northampton	37 hr
Sep 2, 4:45 AM EDT	River Flood Warning	PHI	Bucks	37 hr
Sep 2, 4:45 AM EDT	River Flood Warning	PHI	Bucks	33 hr
Sep 2, 4:45 AM EDT	River Flood Warning	PHI	Bucks	34 hr
Sep 2, 4:45 AM EDT	River Flood Warning	PHI	Monroe, Northampton	5 hr
Sep 2, 6:05 AM EDT	Coastal Flood Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	6 hr
Sep 2, 6:44 PM EDT	Coastal Flood Advisory	PHI	Bucks, Delaware, Philadelphia	7 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.