Alert archive / Pennsylvania / River Flood Warnings in 2020

River Flood Warning 7, NWS Philadelphia/Mount Holly

April 13, 2020Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Apr 13, 2020, 10:58 AM EDT for Chester County, Pennsylvania. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Apr 13, 2020, 10:58 AM EDT (14:58 UTC)
Expired: Apr 13, 2020, 4:59 PM EDT
In force: 6 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: Minor

County Chester County, PA

The radar

The Philadelphia radar (KDIX), 108 km from the middle of the area, began a volume at 14:59 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 East Branch Brandywine Creek below Downingtown (DWNP1). The gauge peaked at 9.09 ft at Apr 13, 2020, 2:00 PM EDT.

Action stage: 6 ft
Minor stage: 7 ft
Moderate stage: 9 ft
Major stage: 11 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01480870, 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.

909 
WGUS41 KPHI 131458
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mt Holly NJ
1058 AM EDT Mon Apr 13 2020

...The National Weather Service in Mount Holly NJ has issued a flood 
warning 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.

&&

PAC029-132058-
/O.NEW.KPHI.FL.W.0007.200413T1458Z-200413T2342Z/
/DWNP1.1.ER.200413T1433Z.200413T1600Z.200413T1742Z.NO/
1058 AM EDT Mon Apr 13 2020

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The East Branch Brandywine Creek at Downingtown.
* Until this evening...or until the warning is cancelled.
* At 10:45 AM Monday the stage was 7.3 feet.
* Flood stage is 7.0 feet.
* Minor flooding is occurring.
* Forecast...The river will continue rising to near 8.4 feet. The river
  will fall below flood stage this afternoon.
* Impact...At 8.0 feet...Dowlin Forge Road begins to flood.
* Flood history...This crest compares to a previous crest of 8.3 feet on
  Jun 4 2003.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG   DAY TIME     CREST

Brandywine Creek
  Downingtown            7.0    7.26  Mon 11 AM    8.4    Mon 12 PM
 
&&
 
LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574
                                      

$$

Kruzdlo

3 follow-up statements

004 
WGUS41 KPHI 131733
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mt Holly NJ
133 PM EDT Mon Apr 13 2020

...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.

&&

PAC029-132332-
/O.EXT.KPHI.FL.W.0007.000000T0000Z-200414T0518Z/
/DWNP1.2.ER.200413T1433Z.200413T1900Z.200413T2318Z.NO/
133 PM EDT Mon Apr 13 2020

...Forecast flooding increased from Minor to Moderate severity...
The Flood Warning continues for 
 The East Branch Brandywine Creek at Downingtown.
* Until late tonight...or until the warning is cancelled.
* At 1:01 PM Monday the stage was 9.0 feet.
* Flood stage is 7.0 feet.
* Minor flooding is occurring and Moderate flooding is forecast.
* Forecast...The river will continue rising to near 9.3 feet by 
  late this afternoon. The river will fall below flood stage this 
  evening.
* 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 9.2 feet
  on Oct 23 2003.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG   DAY TIME     CREST

Brandywine Creek
  Downingtown            7.0    8.96  Mon 1 PM     9.3    Mon 3 PM 
 
&&
 
LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574
                                      

$$

Kruzdlo

002 
WGUS81 KPHI 131906
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
306 PM EDT Mon Apr 13 2020

...The Flood Warning continues 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.

&&

PAC029-140346-
/O.EXT.KPHI.FL.W.0007.000000T0000Z-200414T0346Z/
/DWNP1.2.ER.200413T1433Z.200413T1745Z.200413T2146Z.NO/
306 PM EDT Mon Apr 13 2020

The Flood Warning continues for
  The East Branch Brandywine Creek at Downingtown.
* At  2:45 PM Monday the stage was 8.7 feet.
* Flood stage is 7.0 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river will continue to fall to below flood stage by late 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 8.9 feet on Oct 11 
  2013.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Downingtown            7.0    8.73  Mon 3 PM     8.0    Mon 4 PM 
 
&&
 
LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574
                                      

$$

092 
WGUS81 KPHI 132059
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
459 PM EDT Mon Apr 13 2020

...The Flood Warning is cancelled 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.

&&

PAC029-132129-
/O.CAN.KPHI.FL.W.0007.000000T0000Z-200414T0346Z/
/DWNP1.2.ER.200413T1433Z.200413T1745Z.200413T2021Z.NO/
459 PM EDT Mon Apr 13 2020

The Flood Warning is cancelled for
  The East Branch Brandywine Creek at Downingtown.
* At 4:45 PM Monday the stage was 6.7 feet.
* Flood stage is 7.0 feet.
* Fell below flood stage at 4:21 PM Monday.
* Forecast...The river will continue to fall overnight.
* Impact...At 6.0 feet...Open adjacent land next to the creek 
  floods.
* Flood history...This crest compares to a previous crest of 7.0
  feet on Aug 4 2018.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG   DAY TIME     CREST

Brandywine Creek
  Downingtown            7.0    6.71  Mon 5 PM     Crested and falling 
 
&&
 
LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574
                                      

$$

Kruzdlo

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 6:11 AM EDT	Areal Flood Advisory	PHI	Berks, Chester, Delaware, Montgomery	4 hr
Apr 13, 6:48 AM EDT	Areal Flood Advisory	PHI	Delaware, Montgomery, Philadelphia	4 hr
Apr 13, 8:03 AM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Apr 13, 11:09 AM EDT	Areal Flood Warning	PHI	Chester, Delaware	3 hr
Apr 13, 12:29 PM EDT	River Flood Warning	PHI	Chester, Delaware	12 hr
Apr 13, 1:01 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	4 hr
Apr 13, 1:07 PM EDT	Flash Flood Warning	PHI	Berks, Carbon, Lehigh, Northampton	4 hr
Apr 13, 1:27 PM EDT	Severe Thunderstorm Warning	PHI	Chester	33 min
Apr 13, 1:47 PM EDT	Flash Flood Warning	PHI	Chester	3 hr
Apr 13, 2:23 PM EDT	Areal Flood Warning	PHI	Montgomery, Philadelphia	4 hr
Apr 13, 2:37 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more	2 hr
Apr 13, 2:41 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	64 min
Apr 13, 4:35 PM EDT	Areal Flood Warning	PHI	Montgomery	2 hr

Nearby

River Flood Warnings in Pennsylvania, 2020 Every river flood warning in 2020

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.