Alert archive / Pennsylvania / River Flood Warnings in 2018

River Flood Warning 40, NWS Philadelphia/Mount Holly

August 13, 2018Montgomery County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Aug 13, 2018, 5:09 PM EDT for Montgomery County, Philadelphia County, Pennsylvania. It took effect at Aug 13, 2018, 9:00 PM EDT. It was in force for 28 hr.

The area

The outline as issued.

The facts

Issued: Aug 13, 2018, 5:09 PM EDT (21:09 UTC)
In effect from: Aug 13, 2018, 9:00 PM EDT
Expired: Aug 15, 2018, 12:30 AM EDT
In force: 28 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: Minor

Counties Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 69 km from the middle of the area, began a volume at 21:10 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 Schuylkill River at Philadelphia (PADP1). The gauge peaked at 10.90 ft at Aug 14, 2018, 1:00 AM EDT.

Action stage: 10 ft
Minor stage: 11 ft
Moderate stage: 13 ft
Major stage: 15.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01474500, 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.

780 
WGUS41 KPHI 132109
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mt Holly NJ
509 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...

  Schuylkill River At Philadelphia affecting Montgomery and 
  Philadelphia Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC091-101-140308-
/O.NEW.KPHI.FL.W.0040.180814T0100Z-180815T0430Z/
/PADP1.1.ER.180814T0100Z.180814T1200Z.180814T2230Z.NO/
509 PM EDT Mon Aug 13 2018

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The Schuylkill River at Philadelphia.
* From this evening to late Tuesday night...or until the warning 
  is cancelled.
* At 4:00 PM Monday the stage was 9.6 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage tonight and continue to rise
  to near 12.2 feet by tomorrow morning. The river will fall below 
  flood stage by tomorrow evening.
* Impact...At 12.0 feet...Main Street in Manayunk floods in the area
  of Shurs Lane.
* Flood history...This crest compares to a previous crest of 12.1
  feet on Oct 9 2005.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG    DAY TIME    CREST

Schuylkill River
  Philadelphia           11.0    9.64  Mon 4 PM    12.2    Tue 8 AM 
 
&&
 
LAT...LON 3998 7525 4002 7517 3988 7517 3985 7525
                                      

$$

Kruzdlo

2 follow-up statements

384 
WGUS81 KPHI 140126
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
926 PM EDT Mon Aug 13 2018

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

  Schuylkill River At Berne affecting Berks and Montgomery
  Counties
  Schuylkill River At Pottstown affecting Montgomery County
  Schuylkill River At Norristown affecting Chester...Montgomery
  and Philadelphia Counties
  Schuylkill River At Philadelphia affecting Montgomery and
  Philadelphia Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC011-091-141125-
/O.EXT.KPHI.FL.W.0036.000000T0000Z-180814T1300Z/
/BREP1.1.ER.180813T1956Z.180814T0032Z.180814T0700Z.NO/
926 PM EDT Mon Aug 13 2018

The Flood Warning continues for
  The Schuylkill River at Berne.
* At 8:32 PM Monday the stage was 12.9 feet.
* Flood stage is 12.0 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river will crest late this evening and fall below 
  flood stage early tomorrow.
* Impact...At 12.0 feet...Miller Street in Shoemakersville floods.
* Flood history...This crest compares to a previous crest of 12.9 
  feet on Aug 13 2004.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG    DAY TIME    CREST

Schuylkill River
  Berne                  12.0   12.89  Mon 9 PM    Near crest
 
&&
 
LAT...LON 4056 7598 4059 7595 4036 7591 4031 7598
                                      

$$

PAC091-141125-
/O.EXT.KPHI.FL.W.0037.000000T0000Z-180815T0800Z/
/PTNP1.1.ER.180813T1751Z.180814T1200Z.180815T0200Z.NO/
926 PM EDT Mon Aug 13 2018

The Flood Warning continues for
  The Schuylkill River at Pottstown.
* At 8:46 PM Monday the stage was 11.9 feet.
* Flood stage is 12.5 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage once again tonight and continue
  to rise to near 15.2 feet by tomorrow morning. The river will fall
  below flood stage by late tomorrow evening.
* Flood history...This crest compares to a previous crest of 14.8 feet
  on Jan 20 1996.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG    DAY TIME    CREST

Schuylkill River
  Pottstown              12.5   11.86  Mon 9 PM    15.2    Tue 8 AM 
 
&&
 
LAT...LON 4020 7569 4026 7562 4013 7535 4006 7542
                                      

$$

PAC029-091-101-141125-
/O.EXT.KPHI.FL.W.0038.000000T0000Z-180815T1500Z/
/NRSP1.1.ER.180813T1811Z.180814T0600Z.180815T0900Z.NO/
926 PM EDT Mon Aug 13 2018

The Flood Warning continues for
  The Schuylkill River at Norristown.
* At 8:30 PM Monday the stage was 14.6 feet.
* Flood stage is 13.0 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river will continue rising to near 15.5 feet tonight.
  The river will fall below flood stage Wednesday morning.
* Impact...At 16.0 feet...The Upper Merion Boathouse starts to flood.
* Flood history...This crest compares to a previous crest of 15.4 feet 
  on Sep 29 2004.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG    DAY TIME    CREST

Schuylkill River
  Norristown             13.0   14.65  Mon 8 PM    15.5    Tue 2 AM 
 
&&
 
LAT...LON 4006 7542 4013 7535 4002 7517 3998 7525
                                      

$$

PAC091-101-141125-
/O.EXT.KPHI.FL.W.0040.000000T0000Z-180815T0051Z/
/PADP1.1.ER.180814T0400Z.180814T0600Z.180814T1851Z.NO/
926 PM EDT Mon Aug 13 2018

The Flood Warning continues for
  The Schuylkill River at Philadelphia.
* At 8:00 PM Monday the stage was 10.6 feet.
* Flood stage is 11.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage and continue to rise to near 11.3
  feet tonight. The river will fall below flood stage by early tomorrow 
  afternoon.
* Impact...At 11.5 feet...Route 1 off ramp to Ridge Avenue is flooded
  and closed. MLK Drive is flooded and closed between Greenland Drive and
  Montgomery Drive.
* Flood history...This crest compares to a previous crest of 11.3 feet on 
  Sep 18 2004.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG    DAY TIME    CREST

Schuylkill River
  Philadelphia           11.0   10.58  Mon 8 PM    11.3    Tue 2 AM 
 
&&
 
LAT...LON 3998 7525 4002 7517 3988 7517 3985 7525
                                      

$$

Kruzdlo

340 
WGUS81 KPHI 140822
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
422 AM EDT Tue Aug 14 2018

...The Flood Warning continues for the Schuylkill River from
Pottstown to Norristown...

...The Flood Warning has been cancelled for the other segments
of the Schuylkill River...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC011-091-140852-
/O.CAN.KPHI.FL.W.0036.000000T0000Z-180814T1300Z/
/BREP1.1.ER.180813T1956Z.180814T0132Z.180814T0609Z.NO/
422 AM EDT Tue Aug 14 2018

The Flood Warning is cancelled for
  The Schuylkill River at Berne.
* At 4:00 AM, the river level was 11.41 feet.
* Flood stage is 12.0 feet.
* The river fell below flood stage at 2:09 AM.
* Forecast...The river level will continue to fall.

&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Schuylkill River
  Berne                 12.0   11.41  Tue 400 AM   Crested 
 
&&
 
LAT...LON 4056 7598 4059 7595 4036 7591 4031 7598
                                      

$$

PAC091-141821-
/O.EXT.KPHI.FL.W.0037.000000T0000Z-180814T1900Z/
/PTNP1.1.ER.180813T1751Z.180814T1200Z.180814T1300Z.NO/
422 AM EDT Tue Aug 14 2018

The Flood Warning continues for
  The Schuylkill River at Pottstown.
* At 4:00 AM, the river level was 12.27 feet.
* Flood stage is 12.5 feet.
* Minor flooding is forecast.
* Forecast...The river level should rise above flood stage
  reaching 13.0 feet early this morning. The river will fall
  back below flood stage late this morning.
* Impact...At 13.0 feet...Portions of PA Route 724 along the
  Berks/Chester County line are closed due to high water,
  specfically in Union Township in Berks County and North
  Coventry Township in Chester County.
* Flood history...This crest compares to a previous crest of
  13.0 feet on Jun 20 2003.  

&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Schuylkill River
  Pottstown             12.5   12.27  Tue 400 AM   13.0   Tue 8 AM 
 
&&
 
LAT...LON 4020 7569 4026 7562 4013 7535 4006 7542
                                      

$$

PAC029-091-101-141821-
/O.EXT.KPHI.FL.W.0038.000000T0000Z-180815T0300Z/
/NRSP1.1.ER.180813T1811Z.180814T0245Z.180814T2100Z.NO/
422 AM EDT Tue Aug 14 2018

The Flood Warning continues for
  The Schuylkill River at Norristown.
* At 3:30 AM, the river level was 14.16 feet.
* Flood stage is 13.0 feet.
* Minor flooding is occurring and is forecast to continue.
* Forecast...The river level will continue to fall and it should
  return below flood stage toward evening.
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Schuylkill River
  Norristown            13.0   14.16  Tue 330 AM   Crested 
 
&&
 
LAT...LON 4006 7542 4013 7535 4002 7517 3998 7525
                                      

$$

PAC091-101-140852-
/O.CAN.KPHI.FL.W.0040.000000T0000Z-180815T0051Z/
/PADP1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
422 AM EDT Tue Aug 14 2018

The Flood Warning is cancelled for
  The Schuylkill River at Philadelphia.
* At 3:00 AM, the river level was 10.78 feet.
* Flood stage is 11.0 feet.
* Forecast...The river crested below flood stage at 10.92 feet.
  The river level will continue to fall.
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Schuylkill River
  Philadelphia          11.0   10.78  Tue 300 AM   Crested 
 
&&
 
LAT...LON 3998 7525 4002 7517 3988 7517 3985 7525
                                      

$$

Iovino

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 10:08 PM EDT	Flash Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	24 hr
Aug 13, 4:42 AM EDT	Areal Flood Advisory	PHI	Berks	4 hr
Aug 13, 5:12 AM EDT	Areal Flood Advisory	PHI	Chester	103 min
Aug 13, 6:24 AM EDT	Areal Flood Advisory	PHI	Berks, Chester, Delaware, Montgomery	4 hr
Aug 13, 6:50 AM EDT	Flash Flood Warning	PHI	Berks, Chester, Delaware, Montgomery	6 hr
Aug 13, 8:03 AM EDT	Areal Flood Advisory	PHI	Delaware, Montgomery, Philadelphia	4 hr
Aug 13, 8:43 AM EDT	Flash Flood Warning	PHI	Bucks, Delaware, Lehigh, Montgomery, Northampton, Philadelphia	4 hr
Aug 13, 9:21 AM EDT	River Flood Warning	PHI	Chester	10 hr
Aug 13, 10:40 AM EDT	Areal Flood Advisory	PHI	Carbon, Monroe, Northampton	42 min
Aug 13, 11:05 AM EDT	River Flood Warning	PHI	Chester, Delaware	30 hr
Aug 13, 11:21 AM EDT	Areal Flood Warning	PHI	Carbon, Monroe, Northampton	4 hr
Aug 13, 12:14 PM EDT	River Flood Warning	PHI	Berks, Montgomery	23 hr
Aug 13, 12:14 PM EDT	River Flood Warning	PHI	Montgomery	28 hr
Aug 13, 12:14 PM EDT	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	52 hr
Aug 13, 12:37 PM EDT	Areal Flood Warning	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more	18 hr
Aug 13, 3:07 PM EDT	River Flood Warning	PHI	Montgomery	6 hr
Aug 13, 4:57 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe, Northampton	3 hr
Aug 13, 7:27 PM EDT	Areal Flood Warning	PHI	Carbon, Northampton	7 hr
Aug 13, 7:42 PM EDT	Severe Thunderstorm Warning	PHI	Chester	48 min

Nearby

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

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.