Alert archive / Pennsylvania / River Flood Warnings in 2022

River Flood Warning 21, NWS Philadelphia/Mount Holly

April 19, 2022Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Apr 19, 2022, 1:00 AM EDT for Chester County, Pennsylvania. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Apr 19, 2022, 1:00 AM EDT (05:00 UTC)
Expired: Apr 19, 2022, 7:04 AM 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 05:03 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 East Branch Brandywine Creek below Downingtown (DWNP1). The gauge peaked at 8.44 ft at Apr 19, 2022, 4:00 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.

121 
WGUS41 KPHI 190500
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
100 AM EDT Tue Apr 19 2022

...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...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles. Be especially cautious at night when 
it is harder to recognize the dangers of flooding.

Additional information is available at www.weather.gov/phi.

The next statement will be issued this afternoon at 200 PM EDT.

&&


PAC029-191800-
/O.NEW.KPHI.FL.W.0021.220419T0500Z-220419T1800Z/
/DWNP1.1.ER.220419T0555Z.220419T0900Z.220419T1227Z.NO/
100 AM EDT Tue Apr 19 2022

...FLOOD WARNING IN EFFECT FROM EARLY THIS MORNING TO THIS 
AFTERNOON...

* WHAT...Minor flooding is forecast.

* WHERE...East Branch Brandywine Creek Below Downingtown.

* WHEN...From early this morning to this afternoon.

* IMPACTS...At 6.0 feet, Open adjacent land next to the creek floods.
  At 8.0 feet, Dowlin Forge Road begins to flood.

* ADDITIONAL DETAILS...
  - At 12:45 AM EDT Tuesday the stage was 6.4 feet.
  - Forecast...The river is expected to rise above flood stage
    early this morning to a crest of 7.8 feet early this morning.
    It will then fall below flood stage this morning.
  - Flood stage is 7.0 feet.
  - Flood History...This crest compares to a previous crest of
    7.9 feet on 08/19/2021.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (1 am)        Crest
Location        Stg   Stg Day/Time    Wed  Thu        Stg Time Date

East Branch Bran
Downingtown     7.0   6.4  Tue 12 a   3.7  MSG        7.8 5am 4/19


&&

LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574


$$

Staarmann

2 follow-up statements

866 
WGUS81 KPHI 190856
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
456 AM EDT Tue Apr 19 2022

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

  East Branch Brandywine Creek Below Downingtown affecting Chester 
  County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles. Be especially cautious at night when 
it is harder to recognize the dangers of flooding.

Additional information is available at www.weather.gov/phi.

The next statement will be issued this morning at 1100 AM EDT.

&&


PAC029-191500-
/O.EXT.KPHI.FL.W.0021.000000T0000Z-220419T1500Z/
/DWNP1.1.ER.220419T0527Z.220419T0745Z.220419T1227Z.NO/
456 AM EDT Tue Apr 19 2022

...FLOOD WARNING NOW IN EFFECT UNTIL LATE THIS MORNING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...East Branch Brandywine Creek Below Downingtown.

* WHEN...Until late this morning.

* IMPACTS...At 6.0 feet, Open adjacent land next to the creek floods.
  At 8.0 feet, Dowlin Forge Road begins to flood.
  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.

* ADDITIONAL DETAILS...
  - At 4:45 AM EDT Tuesday the stage was 8.3 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 4:45 AM EDT Tuesday was 8.5 feet.
  - Forecast...The river is expected to fall below flood stage
    this morning and continue falling to 3.7 feet tomorrow
    morning.
  - Flood stage is 7.0 feet.
  - Flood History...This crest compares to a previous crest of
    8.3 feet on 06/04/2003.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (5 am)        Crest
Location        Stg   Stg Day/Time    Wed  Thu        Stg Time Date

East Branch Bran
Downingtown     7.0   8.3  Tue 4 am   3.7  MSG         MSG  unknown


&&

LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574


$$

Staarmann

488 
WGUS81 KPHI 191104
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
704 AM EDT Tue Apr 19 2022

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

  East Branch Brandywine Creek Below Downingtown affecting Chester 
  County.

PAC029-191215-
/O.CAN.KPHI.FL.W.0021.000000T0000Z-220419T1104Z/
/DWNP1.1.ER.220419T0527Z.220419T0745Z.220419T1227Z.NO/
704 AM EDT Tue Apr 19 2022

...FLOOD WARNING IS CANCELLED...

The Flood Warning is cancelled for
  the East Branch Brandywine Creek Below Downingtown.

* ADDITIONAL DETAILS...
  - At 6:45 AM EDT Tuesday the stage was 6.8 feet.
  - Forecast...The river is expected to rise to a crest of 7.3
    feet this morning. It will then fall below flood stage this
    morning.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (7 am)        Crest
Location        Stg   Stg Day/Time    Wed  Thu        Stg Time Date

East Branch Bran
Downingtown     7.0   6.8  Tue 6 am   3.7  MSG        7.3 7am 4/19


&&

LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574


$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 1:20 AM EDT	Areal Flood Warning	PHI	Chester, Delaware	3 hr
Apr 19, 1:23 AM EDT	Areal Flood Warning	PHI	Montgomery	5 hr
Apr 19, 1:38 AM EDT	River Flood Warning	PHI	Delaware	3 hr
Apr 19, 1:43 AM EDT	Areal Flood Warning	PHI	Montgomery, Philadelphia	10 hr
Apr 19, 2:16 AM EDT	Areal Flood Warning	PHI	Bucks	8 hr
Apr 19, 4:46 AM EDT	River Flood Warning	PHI	Bucks	7 hr
Apr 19, 4:50 AM EDT	River Flood Warning	PHI	Chester, Delaware	7 hr
Apr 19, 6:23 PM EDT	Special Weather Statement	PHI	Bucks, Northampton	22 min

Nearby

River Flood Warnings in Pennsylvania, 2022 Every river flood warning in 2022

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.