Alert archive / Pennsylvania / River Flood Warnings in 2019

River Flood Warning 15, NWS Philadelphia/Mount Holly

June 20, 2019Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Jun 20, 2019, 3:59 AM EDT for Chester County, Pennsylvania. It took effect at Jun 20, 2019, 4:34 AM EDT. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jun 20, 2019, 3:59 AM EDT (07:59 UTC)
In effect from: Jun 20, 2019, 4:34 AM EDT
Expired: Jun 20, 2019, 11:05 AM EDT
In force: 7 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 08:02 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 9.19 ft at Jun 20, 2019, 6:00 AM 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.

372 
WGUS41 KPHI 200759
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
359 AM EDT Thu Jun 20 2019

...The National Weather Service in Mount Holly has issued a Flood
Warning for the East Branch Brandywine Creek Below Downingtown...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-201359-
/O.NEW.KPHI.FL.W.0015.190620T0834Z-190620T1741Z/
/DWNP1.1.ER.190620T0834Z.190620T1000Z.190620T1141Z.NO/
359 AM EDT Thu Jun 20 2019

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The East Branch Brandywine Creek at Downingtown.
* until this afternoon...Or until the warning is cancelled.
* At 3:45 AM, the creek level was 6.30 feet.
* Flood stage is 7.0 feet.
* Minor flooding is forecast.
* Forecast...The creek is expected to rise to near 7.8 feet
  early this morning, before falling back below flood stage by
  late morning.
* Impact...At 8.0 feet...Dowlin Forge Road begins to flood.
* Flood history...This crest compares to a previous crest of
  8.2 feet on June 11, 2018.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Downingtown            7.0    6.30  Thu 345 AM    7.8    Thu 6 AM 
 
&&
 
LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574
                                      
$$

Iovino

2 follow-up statements

842 
WGUS41 KPHI 200858
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
458 AM EDT Thu Jun 20 2019

...Forecast flooding changed from Minor to Moderate severity
for the East Branch Brandywine Creek Below Downingtown...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-201458-
/O.EXT.KPHI.FL.W.0015.000000T0000Z-190620T2130Z/
/DWNP1.2.ER.190620T0806Z.190620T1100Z.190620T1530Z.NO/
458 AM EDT Thu Jun 20 2019

...Forecast flooding increased from Minor to Moderate severity...
The Flood Warning continues for 
 The East Branch Brandywine Creek Below Downingtown.
* until this afternoon...Or until the warning is cancelled.
* At 4:45 AM, the creek level was 8.37 feet.
* Flood stage is 7.0 feet.
* Minor flooding is occurring and moderate flooding is forecast.
* Forecast...The creek will continue rising to near 9.8 feet
  this morning. The creek should fall back below flood stage
  by 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
  9.8 feet on April 16, 1996.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Downingtown            7.0    8.37  Thu 445 AM    9.8    Thu 7 AM 
 
&&
 
LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574
                                      
$$

Iovino

948 
WGUS81 KPHI 201505
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
1105 AM EDT Thu Jun 20 2019

...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.

&&

PAC029-201535-
/O.CAN.KPHI.FL.W.0015.000000T0000Z-190620T2130Z/
/DWNP1.2.ER.190620T0806Z.190620T1115Z.190620T1428Z.NO/
1105 AM EDT Thu Jun 20 2019

The Flood Warning is cancelled for
  The East Branch Brandywine Creek at Downingtown.
* At 10:45 AM Thursday the stage was 6.7 feet.
* Flood stage is 7.0 feet.
* Fell below flood stage at 10:28 AM Thursday.
* Forecast...The river will continue to fall to 3.8 feet 
  by tomorrow morning assuming the basin does not receive
  any additional rainfall.
* 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    6.67  Thu 11 AM    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
Jun 19, 9:09 PM EDT	Areal Flood Warning	PHI	Philadelphia	3 hr
Jun 19, 9:50 PM EDT	Special Weather Statement	PHI	Lebanon	55 min
Jun 19, 10:47 PM EDT	Areal Flood Advisory	PHI	Berks	50 min
Jun 19, 11:11 PM EDT	Flash Flood Warning	PHI	Chester, Delaware	6 hr
Jun 19, 11:34 PM EDT	Flash Flood Warning	PHI	Berks	6 hr
Jun 20, 12:39 AM EDT	Areal Flood Advisory	PHI	Montgomery	7 min
Jun 20, 12:45 AM EDT	Flash Flood Warning	PHI	Montgomery, Philadelphia	6 hr
Jun 20, 3:40 AM EDT	River Flood Warning	PHI	Delaware	111 min
Jun 20, 5:10 AM EDT	Areal Flood Warning	PHI	Chester, Delaware	12 hr
Jun 20, 5:19 AM EDT	River Flood Warning	PHI	Chester, Delaware	13 hr
Jun 20, 5:24 AM EDT	Areal Flood Warning	PHI	Berks	6 hr
Jun 20, 6:14 AM EDT	Areal Flood Warning	PHI	Montgomery, Philadelphia	10 hr
Jun 20, 6:31 AM EDT	River Flood Warning	PHI	Delaware	3 hr
Jun 20, 1:24 PM EDT	Special Weather Statement	PHI	Berks, Chester, Montgomery	51 min
Jun 20, 1:28 PM EDT	Areal Flood Advisory	PHI	Berks	4 hr
Jun 20, 2:13 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery	4 hr
Jun 20, 2:26 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	94 min
Jun 20, 2:33 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	57 min
Jun 20, 2:48 PM EDT	Flash Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Jun 20, 3:20 PM EDT	Flash Flood Warning	PHI	Bucks	4 hr
Jun 20, 4:58 PM EDT	River Flood Warning	PHI	Chester	4 hr
Jun 20, 6:33 PM EDT	Areal Flood Warning	PHI	Montgomery	3 hr

Nearby

River Flood Warnings in Pennsylvania, 2019 Every river flood warning in 2019

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.