River Flood Warning 39, NWS Philadelphia/Mount Holly

Issued

Aug 13, 2018, 3:07 PM EDT (19:07 UTC)

In effect from

Aug 13, 2018, 5:00 PM EDT

Expired

Aug 13, 2018, 8:52 PM EDT

In force

4 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 19:08 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 11.36 ft at Aug 13, 2018, 5:00 PM EDT.

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.

027 
WGUS41 KPHI 131907
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mt Holly NJ
307 PM EDT Mon Aug 13 2018

...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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC091-140106-
/O.NEW.KPHI.FL.W.0039.180813T2100Z-180814T1233Z/
/GRAP1.1.ER.180813T2100Z.180814T0000Z.180814T0633Z.NO/
307 PM EDT Mon Aug 13 2018

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The Perkiomen Creek at Graterford.
* Until Tuesday morning...or until the warning is cancelled.
* At 2:31 PM Monday the stage was 10.5 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage this afternoon and continue 
  to rise to near 11.9 feet this evening. The river will fall
  below flood stage overnight tonight.
* 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 Mar 22 2000.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG    DAY TIME    CREST

Perkiomen Creek
  Graterford             11.0   10.49  Mon 3 PM    11.9    Mon 8 PM 
 
&&
 
LAT...LON 4024 7549 4024 7542 4011 7542 4012 7547
                                      

$$

Kruzdlo

692 
WGUS81 KPHI 140052
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
852 PM EDT Mon Aug 13 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.

&&

PAC091-140122-
/O.CAN.KPHI.FL.W.0039.000000T0000Z-180814T1233Z/
/GRAP1.1.ER.180813T1921Z.180813T2131Z.180813T2307Z.NO/
852 PM EDT Mon Aug 13 2018

The Flood Warning is cancelled for
  The Perkiomen Creek at Graterford.
* At 8:32 PM Monday the stage was 10.2 feet.
* Flood stage is 11.0 feet.
* Fell below flood stage at 7:07 PM Monday.
* Forecast...The river will continue to fall to 4.6 feet by
  Wednesday morning.
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG    DAY TIME    CREST

Perkiomen Creek
  Graterford             11.0   10.24  Mon 9 PM    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.