Alert archive / Pennsylvania / River Flood Warnings in 2018

River Flood Warning 47, NWS Philadelphia/Mount Holly

September 28, 2018Chester County, Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Sep 28, 2018, 8:28 AM EDT for Chester County, Delaware County, Pennsylvania. It took effect at Sep 28, 2018, 1:00 PM EDT. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Sep 28, 2018, 8:28 AM EDT (12:28 UTC)
In effect from: Sep 28, 2018, 1:00 PM EDT
Expired: Sep 28, 2018, 9:16 PM EDT
In force: 8 hr
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 12:29 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 9.16 ft at Sep 28, 2018, 5:00 PM EDT.

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.

728 
WGUS41 KPHI 281228
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mt Holly NJ
828 AM EDT Fri Sep 28 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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-045-281828-
/O.NEW.KPHI.FL.W.0047.180928T1700Z-180929T0700Z/
/CDFP1.1.ER.180928T1700Z.180929T0000Z.180929T0100Z.NO/
828 AM EDT Fri Sep 28 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 late tonight...or until the warning 
  is cancelled.
* At 7:30 AM Friday the stage was 6.8 feet.
* Flood stage is 9.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage around midday and continue to 
  rise to near 9.7 feet by this evening.
* 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 9.8 
  feet on Jan 28 1996.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG   DAY TIME     CREST

Brandywine Creek
  Chadds Ford            9.0    6.78  Fri 7 AM     9.7    Fri 8 PM 
 
&&
 
LAT...LON 3993 7561 3982 7553 3979 7560 3991 7567
                                      

$$

Kruzdlo

2 follow-up statements

000 
WGUS81 KPHI 281802
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
202 PM EDT Fri Sep 28 2018

...The Flood Warning continues 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.

&&

PAC029-045-290401-
/O.EXT.KPHI.FL.W.0047.000000T0000Z-180929T0440Z/
/CDFP1.1.ER.180928T2000Z.180928T2200Z.180928T2240Z.NO/
202 PM EDT Fri Sep 28 2018

The Flood Warning continues for
  The Brandywine Creek at Chadds Ford.
* At 1:30 PM Friday the stage was 8.8 feet.
* Flood stage is 9.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage late this afternoon and 
  continue to rise to near 9.2 feet early this evening. The 
  river will fall below flood stage by by late evening.
* 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 Apr 2 1998.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG   DAY TIME     CREST

Brandywine Creek
  Chadds Ford            9.0    8.77  Fri 1 PM     9.2    Fri 6 PM 
 
&&
 
LAT...LON 3993 7561 3982 7553 3979 7560 3991 7567
                                      

$$

Kruzdlo

381 
WGUS81 KPHI 290116
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
916 PM EDT Fri Sep 28 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.

&&

PAC029-045-290146-
/O.CAN.KPHI.FL.W.0047.000000T0000Z-180929T0440Z/
/CDFP1.1.ER.180928T1856Z.180928T2115Z.180928T2147Z.NO/
916 PM EDT Fri Sep 28 2018

The Flood Warning is cancelled for
  The Brandywine Creek at Chadds Ford.
* At  8:30 PM Friday the stage was 7.6 feet.
* Flood stage is 9.0 feet.
* Fell below flood stage at  5:47 PM Friday.
* Forecast...The river will continue to fall to 3.5 feet by Sunday morning.
* Impact...At 8.0 feet...Open adjacent land next to the creek floods.

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Chadds Ford            9.0    7.59  Fri 8 PM     5.9    Sat 2 AM 
 
&&
 
LAT...LON 3993 7561 3982 7553 3979 7560 3991 7567
                                      

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 12:10 AM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	13 hr
Sep 28, 1:44 AM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	5 hr
Sep 28, 3:13 AM EDT	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Sep 28, 4:59 AM EDT	River Flood Warning	PHI	Chester	7 hr
Sep 28, 5:33 AM EDT	River Flood Warning	PHI	Montgomery	6 hr
Sep 28, 7:33 AM EDT	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	5 hr
Sep 28, 8:33 AM EDT	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	7 hr
Sep 28, 12:31 PM EDT	Areal Flood Warning	PHI	Montgomery, Philadelphia	2 hr

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.