Alert archive / Pennsylvania / River Flood Warnings in 2018

River Flood Warning 56, NWS Philadelphia/Mount Holly

November 3, 2018Chester County, Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Nov 3, 2018, 5:00 AM EDT for Chester County, Delaware County, Pennsylvania. It took effect at Nov 3, 2018, 2:00 PM EDT. It was in force for .

The area

The outline as issued.

The facts

Issued
Nov 3, 2018, 5:00 AM EDT (09:00 UTC)
In effect from
Nov 3, 2018, 2:00 PM EDT
Expired
Nov 3, 2018, 11:02 AM EDT
In force
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
Minor

Counties Chester County, PA, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 102 km from the middle of the area, began a volume at 09:03 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 Brandywine Creek at Chadds Ford (CDFP1). The gauge peaked at 8.70 ft at Nov 3, 2018, 1:00 PM EDT.

actionminormoderate51011/0311/04
Action stage
8 ft
Minor stage
9 ft
Moderate stage
11 ft
Major stage
13 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01481000, 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.

729 
WGUS41 KPHI 030900
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mt Holly NJ
500 AM EDT Sat Nov 3 2018

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

  Brandywine Creek At Chadds Ford affecting Chester and Delaware Counties
...Forecast flooding changed from Minor to Moderate severity for the following 
rivers in Pennsylvania...
  East Branch Brandywine Creek Below Downingtown affecting Chester County

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-031500-
/O.EXT.KPHI.FL.W.0052.000000T0000Z-181103T2341Z/
/DWNP1.2.ER.181103T0605Z.181103T1000Z.181103T1741Z.NO/
500 AM EDT Sat Nov 3 2018

...Observed flooding increased from Minor to Moderate severity...
...Forecast flooding increased from Minor to Moderate severity...
The Flood Warning continues for 
 The East Branch Brandywine Creek Below Downingtown.
* Until this evening...Or until the warning is cancelled.
* At 4:45 AM Saturday the stage was 9.1 feet.
* Flood stage is 7.0 feet.
* Moderate flooding is occurring and Moderate flooding is forecast.
* Forecast...The river will continue rising to near 9.3 feet by this morning. 
  The river will fall below flood stage this afternoon.
* Impact...At 9.0 feet...High water on the Brandywine sends backwater up Beaver 
  Creek. Beaver Creek floods inundating parks and the Downingtown Little League 
  fields.
* Flood history...This crest compares to a previous crest of 9.3 feet on Apr 17 
  2011.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Downingtown            7.0    9.15  Sat 5 AM     9.3    Sat 6 AM 
 
&&
 
LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574
                                      

$$

PAC029-045-031500-
/O.NEW.KPHI.FL.W.0056.181103T1800Z-181104T0000Z/
/CDFP1.1.ER.181103T1800Z.181103T1800Z.181103T1800Z.NO/
500 AM EDT Sat Nov 3 2018

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The Brandywine Creek at Chadds Ford.
* From this afternoon to this evening...Or until the warning is cancelled.
* At 4:30 AM Saturday the stage was 5.8 feet.
* Flood stage is 9.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise to near flood stage this afternoon.
* Impact...At 10.0 feet...The intersections of Creek Road and Route 926 near 
  Pocopson floods upstream of Chadds Ford.
* Flood history...This crest compares to a previous crest of 9.2 feet on Sep 28 
  2018.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Chadds Ford            9.0    5.85  Sat 4 AM     9.0    Sat 2 PM 
 
&&
 
LAT...LON 3993 7561 3982 7553 3979 7560 3991 7567
                                      

$$
1 follow-up statement
627 
WGUS81 KPHI 031502
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
1102 AM EDT Sat Nov 3 2018

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

  Brandywine Creek At Chadds Ford affecting Chester and Delaware Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-045-031532-
/O.CAN.KPHI.FL.W.0056.000000T0000Z-181104T0000Z/
/CDFP1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
1102 AM EDT Sat Nov 3 2018

The Flood Warning is cancelled for
  The Brandywine Creek at Chadds Ford.
* At 10:30 AM Saturday the stage was 8.6 feet.
* Flood stage is 9.0 feet.
* Forecast...The river will crest below flood stage at 8.9 feet this afternoon.
* Impact...At 8.0 feet...Open adjacent land next to the creek floods.
* Flood history...This crest compares to a previous crest of 9.2 feet on Sep 28 
  2018.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Chadds Ford            9.0    8.65  Sat 10 AM    8.9    Sat 2 PM 
 
&&
 
LAT...LON 3993 7561 3982 7553 3979 7560 3991 7567
                                      

$$

CMS

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 2, 8:22 PM EDTAreal Flood AdvisoryPHIBerks, Lehigh, Northampton4 hr
Nov 2, 9:28 PM EDTAreal Flood AdvisoryPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton4 hr
Nov 2, 9:48 PM EDTSpecial Weather StatementPHIBerks, Chester27 min
Nov 2, 10:09 PM EDTSevere Thunderstorm WarningPHIChester, Delaware, Montgomery51 min
Nov 2, 10:32 PM EDTTornado WarningPHIBerks, Chester, Montgomery28 min
Nov 2, 10:36 PM EDTSpecial Weather StatementPHINorthampton24 min
Nov 2, 10:45 PM EDTAreal Flood WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton13 hr
Nov 2, 10:47 PM EDTTornado WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton43 min
Nov 2, 10:53 PM EDTFlash Flood WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton4 hr
Nov 2, 10:53 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more67 min
Nov 2, 11:23 PM EDTTornado WarningPHIBucks, Chester, Delaware, Montgomery, Philadelphia24 min
Nov 2, 11:25 PM EDTAreal Flood AdvisoryPHIBucks, Chester, Delaware, Montgomery, Philadelphia4 hr
Nov 2, 11:49 PM EDTTornado WarningPHIBucks26 min
Nov 2, 11:53 PM EDTAreal Flood AdvisoryPHIBucks4 hr
Nov 2, 11:53 PM EDTSpecial Weather StatementPHIDelaware, Philadelphia37 min
Nov 3, 12:20 AM EDTAreal Flood AdvisoryPHIBerks, Carbon, Lehigh, Monroe, Northampton4 hr
Nov 3, 1:03 AM EDTRiver Flood WarningPHILehigh5 hr
Nov 3, 1:29 AM EDTAreal Flood AdvisoryPHIMonroe, Northampton4 hr
Nov 3, 1:41 AM EDTAreal Flood AdvisoryPHIBucks4 hr
Nov 3, 2:03 AM EDTRiver Flood WarningPHIChester6 hr
Nov 3, 2:34 AM EDTAreal Flood WarningPHIBucks, Northampton15 hr
Nov 3, 2:40 AM EDTRiver Flood WarningPHIMontgomery10 hr
Nov 3, 2:40 AM EDTRiver Flood WarningPHIChester, Montgomery, Philadelphia15 hr
Nov 3, 3:21 AM EDTAreal Flood WarningPHIBucks, Chester, Delaware, Montgomery, Philadelphia4 hr
Nov 3, 7:01 AM EDTAreal Flood WarningPHIBucks, Chester, Delaware, Montgomery, Philadelphia5 hr
Nov 3, 11:44 AM EDTAreal Flood WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton8 hr
Nov 3, 5:19 PM EDTAreal Flood WarningPHINorthampton22 hr

Nearby

River Flood Warnings in Pennsylvania, 2018Every 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.