River Flood Warning 63, NWS Philadelphia/Mount Holly

Issued

Nov 25, 2018, 12:13 AM EST (05:13 UTC)

In effect from

Nov 25, 2018, 4:00 AM EST

Expired

Nov 25, 2018, 10:37 AM EST

In force

7 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 05:15 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).

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.

864 
WGUS41 KPHI 250513
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
1213 AM EST Sun Nov 25 2018

...The National Weather Service in Mount Holly NJ has issued a
Flood Warning for the Perkiomen Creek at Graterford...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas.
The water may be deeper than you think it is.

&&

PAC091-251112-
/O.NEW.KPHI.FL.W.0063.181125T0900Z-181125T1918Z/
/GRAP1.1.ER.181125T0900Z.181125T1200Z.181125T1318Z.NO/
1213 AM EST Sun Nov 25 2018

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The Perkiomen Creek at Graterford.
* from early this morning until this afternoon.
* At 12:05 AM the creek level was 8.89 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* Forecast...The creek is forecast to rise above flood stage 
  overnight, reaching 11.7 feet around daybreak. The creek
  should fall back below flood stage on Sunday morning.
* Impact...At 12.0 feet, Penitentiary Bridge is closed.
  Flooding begins in Collegeville. Houses on the right bank
  in Graterford take on water.
* Flood history...This crest compares to a previous crest of
  11.9 feet on March 22, 2000.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Perkiomen Creek
  Graterford            11.0   8.89  Sun 1205 AM   11.7 Sun 7 AM 
 
&&
 
LAT...LON 4024 7549 4024 7542 4011 7542 4012 7547                                    

$$

Iovino

898 
WGUS81 KPHI 250748
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
248 AM EST Sun Nov 25 2018

...The Flood Warning continues for the Perkiomen Creek at
Graterford...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas.
The water may be deeper than you think it is.

&&

PAC091-251747-
/O.EXT.KPHI.FL.W.0063.181125T0900Z-181125T1900Z/
/GRAP1.1.ER.181125T0900Z.181125T1200Z.181125T1300Z.NO/
248 AM EST Sun Nov 25 2018

The Flood Warning continues for
  The Perkiomen Creek at Graterford.
* until this afternoon or until the warning is cancelled.
* At 2:30 AM the creek level was 10.47 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* Forecast...The creek is expected to rise above flood stage 
  overnight, reaching 12.4 feet around daybreak. The creek should
  fall back below flood stage late this morning.
* Impact...At 12.0 feet, Penitentiary Bridge is closed. Flooding
  occurs in Collegeville. Houses on the right bank in Graterford
  take on water.
* Flood history...This crest compares to a previous crest of 12.4
  feet on September 15, 2003.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Perkiomen Creek
  Graterford            11.0   10.47  Sun 230 AM   12.4  Sun 7 AM 
 
&&
 
LAT...LON 4024 7549 4024 7542 4011 7542 4012 7547
                                      
$$

Iovino

924 
WGUS81 KPHI 251537
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
1037 AM EST Sun Nov 25 2018

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

  Perkiomen Creek At Graterford affecting Montgomery County

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. 
The water may be deeper than you think.

&&

PAC091-251607-
/O.CAN.KPHI.FL.W.0063.000000T0000Z-181125T1900Z/
/GRAP1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
1037 AM EST Sun Nov 25 2018

The Flood Warning is cancelled for
  The Perkiomen Creek at Graterford.
* At 10:15 AM Sunday the stage was 7.7 feet.
* Flood stage is 11.0 feet.
* Forecast...The river will continue to fall throughout the day.
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG   DAY TIME     CREST

Perkiomen Creek
  Graterford             11.0   7.72  Sun 10 AM    Crested and falling 
 
&&
 
LAT...LON 4024 7549 4024 7542 4011 7542 4012 7547
                                      

$$

Kruzdlo

River Flood Warnings in Pennsylvania, 2018Every river flood warning in 2018

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.