River Flood Warning 55, NWS Philadelphia/Mount Holly

Issued

Dec 25, 2020, 12:36 AM EST (05:36 UTC)

In effect from

Dec 25, 2020, 2:00 AM EST

Expired

Dec 25, 2020, 1:33 PM EST

In force

12 hr

Issued by

NWS Philadelphia/Mount Holly

Area

Storm-based polygon

Flood severity

Minor

County Montgomery County, PA

The Philadelphia radar (KDIX), 93 km from the middle of the area, began a volume at 05:37 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.

Written for the forecast point Perkiomen Creek at Graterford (GRAP1). The gauge peaked at 12.93 ft at Dec 25, 2020, 7:00 AM EST.

Action stage

8 ft

Minor stage

11 ft

Moderate stage

13 ft

Major stage

16 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01473000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

679 
WGUS41 KPHI 250536
FLWPHI

BULLETIN - EAS ACTIVATION REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
1236 AM EST Fri Dec 25 2020

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

  Perkiomen Creek At Graterford affecting Montgomery County.

For the Perkiomen Creek...including Graterford...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.


PAC091-251745-
/O.NEW.KPHI.FL.W.0055.201225T0700Z-201225T2100Z/
/GRAP1.1.ER.201225T0700Z.201225T1200Z.201225T1500Z.NO/
1236 AM EST Fri Dec 25 2020

The National Weather Service in Mount Holly has issued a

* Flood Warning for
  the Perkiomen Creek At Graterford.
* Until this afternoon.
* At 12:16 AM EST Friday the stage was 10.6 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage early 
  this morning to a crest of 12.5 near daybreak. It will then fall 
  below flood stage late this morning.
* Impact at 8.0 feet...Park Avenue in Schwenksville is flooded. The 
  Perkiomen Trail is flooded in Perkiomen Township at Plank Road and 
  Route 113. Ninth Avenue begins to flood in Collegeville. Impact at 
  11.0 feet...Graterford Road and Penitentiary Bridge are closed due 
  to flooding. Impact at 12.0 feet...Portions of Central Perkiomen 
  Park in Collegeville are flooded. Flood waters expand onto and to 
  the west of First Avenue in Collegeville.
* Flood History...This crest compares to a previous crest of 12.5 
  feet on 07/28/2004.

&&


Stream          Fld   Observed        Fcsts (1 am)        Crest
Location        Stg   Stg Day/Time    Sat  Sun        Stg Time Date

Perkiomen Creek
Graterford      11.0  10.6 Fri 12 a   4.8  3.3        12.5 7am 12/25





&&

LAT...LON 4024 7548 4024 7542 4011 7542 4011 7547

$$

CMS

825 
WGUS41 KPHI 251137
FLWPHI

BULLETIN - EAS ACTIVATION REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
637 AM EST Fri Dec 25 2020

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

  Perkiomen Creek At Graterford affecting Montgomery County.

For the Perkiomen Creek...including Graterford...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.


PAC091-252345-
/O.EXT.KPHI.FL.W.0055.000000T0000Z-201226T0100Z/
/GRAP1.2.ER.201225T0532Z.201225T1200Z.201225T1900Z.NO/
637 AM EST Fri Dec 25 2020

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

The Flood Warning continues for
  the Perkiomen Creek At Graterford.
* Until this evening.
* At 6:31 AM EST Friday the stage was 12.9 feet.
* Flood stage is 11.0 feet.
* Minor flooding is occurring and moderate flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 6:31 AM EST Friday was 12.9 feet.
* Forecast...The river is expected to rise to a crest of 13.1 feet 
  this morning. It will then fall below flood stage this afternoon.
* Impact at 11.0 feet...Graterford Road and Penitentiary Bridge are 
  closed due to flooding. Impact at 12.0 feet...Portions of Central 
  Perkiomen Park in Collegeville are flooded. Flood waters expand 
  onto and to the west of First Avenue in Collegeville. Impact at 
  13.0 feet...First Avenue in Collegeville becomes impassable.
* Flood History...This crest compares to a previous crest of 13.2 
  feet on 09/27/1985.

&&


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

Perkiomen Creek
Graterford      11.0  12.9 Fri 6 am   5.2  3.3        13.1 7am 12/25





&&

LAT...LON 4024 7548 4024 7542 4011 7542 4011 7547

$$

CMS

035 
WGUS81 KPHI 251833
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
133 PM EST Fri Dec 25 2020

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

  Perkiomen Creek At Graterford affecting Montgomery County.

PAC091-251945-
/O.CAN.KPHI.FL.W.0055.000000T0000Z-201225T1833Z/
/GRAP1.2.ER.201225T0532Z.201225T1200Z.201225T1900Z.NO/
133 PM EST Fri Dec 25 2020

...The Flood Warning for the Perkiomen Creek At Graterford has been 
cancelled...

The Flood Warning is cancelled for
  the Perkiomen Creek At Graterford.
* At 1:15 PM EST Friday the stage was 9.1 feet.
* Flood stage is 11.0 feet.
* Forecast...The river is expected to fall to 2.7 feet Monday 
  morning.

&&


Stream          Fld   Observed        Fcsts (1 pm)        Crest
Location        Stg   Stg Day/Time    Sat  Sun        Stg Time Date

Perkiomen Creek
Graterford      11.0  9.1  Fri 1 pm   4.7  3.0        Crested





&&

LAT...LON 4024 7548 4024 7542 4011 7542 4011 7547

$$

Kruzdlo

River Flood Warnings in Pennsylvania, 2020Every river flood warning in 2020

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.