Alert archive / Pennsylvania / River Flood Warnings in 2022

River Flood Warning 1, NWS Philadelphia/Mount Holly

April 7, 2022Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Apr 7, 2022, 8:09 PM EDT for Chester County, Pennsylvania. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Apr 7, 2022, 8:09 PM EDT (00:09 UTC)
Expired: Apr 8, 2022, 2:59 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 00:09 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 8.31 ft at Apr 8, 2022, 12:00 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.

084 
WGUS41 KPHI 080009
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
809 PM EDT Thu Apr 7 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.

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

The next statement will be issued late tonight at 515 AM EDT.

&&


PAC029-080915-
/O.NEW.KPHI.FL.W.0001.220408T0009Z-220408T0901Z/
/DWNP1.1.ER.220407T2351Z.220408T0100Z.220408T0300Z.NO/
809 PM EDT Thu Apr 7 2022

...FLOOD WARNING IN EFFECT FROM THIS EVENING TO LATE TONIGHT...

* WHAT...Minor flooding is forecast.

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

* WHEN...From this evening to late tonight.

* 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 7:45 PM EDT Thursday the stage was 6.8 feet.
  - Forecast...The river is expected to rise above flood stage
    this evening and crest at 8.9 feet.
  - Flood stage is 7.0 feet.
  - Flood History...This crest compares to a previous crest of
    9.2 feet on 10/23/2003.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (8 pm)        Crest
Location        Stg   Stg Day/Time    Fri  Sat        Stg Time Date

East Branch Bran
Downingtown     7.0   6.8  Thu 7 pm   4.3  MSG        8.9 9pm 4/07


&&

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


$$

Kruzdlo

2 follow-up statements

876 
WGUS81 KPHI 080352
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
1152 PM EDT Thu Apr 7 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.

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

The next statement will be issued late tonight by 515 AM EDT.

&&


PAC029-080915-
/O.CON.KPHI.FL.W.0001.000000T0000Z-220408T0901Z/
/DWNP1.1.ER.220407T2351Z.220408T0400Z.220408T0758Z.NO/
1152 PM EDT Thu Apr 7 2022

...FLOOD WARNING REMAINS IN EFFECT UNTIL LATE TONIGHT...

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

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

* WHEN...Until late tonight.

* 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 10:45 PM EDT Thursday the stage was 8.2 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 10:45 PM EDT Thursday was 8.2 feet.
  - Forecast...The river is expected to fall below flood stage
    late tonight and continue falling to 4.2 feet late Saturday
    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 (12 am)       Crest
Location        Stg   Stg Day/Time    Sat  Sun        Stg Time Date

East Branch Bran
Downingtown     7.0   8.2  Thu 10 p   4.3  MSG        8.5 12am 4/08


&&

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


$$

Kruzdlo

990 
WGUS81 KPHI 080659
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
259 AM EDT Fri Apr 8 2022

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

  East Branch Brandywine Creek Below Downingtown affecting Chester 
  County.

PAC029-080800-
/O.CAN.KPHI.FL.W.0001.000000T0000Z-220408T0659Z/
/DWNP1.1.ER.220407T2351Z.220408T0330Z.220408T0758Z.NO/
259 AM EDT Fri Apr 8 2022

...FLOOD WARNING IS CANCELLED...

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

* ADDITIONAL DETAILS...
  - At 2:45 AM EDT Friday the stage was 6.9 feet.
  - Forecast...The river will fall to 4.2 feet this morning.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (3 am)        Crest
Location        Stg   Stg Day/Time    Sat  Sun        Stg Time Date

East Branch Bran
Downingtown     7.0   6.9  Fri 2 am   4.2  MSG        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 7, 10:24 PM EDT	Areal Flood Warning	PHI	Philadelphia	10 hr
Apr 7, 10:32 PM EDT	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	11 hr
Apr 7, 10:41 PM EDT	River Flood Warning	PHI	Bucks	14 hr
Apr 7, 10:46 PM EDT	Areal Flood Warning	PHI	Bucks	10 hr
Apr 7, 10:47 PM EDT	River Flood Warning	PHI	Monroe	10 hr
Apr 7, 10:49 PM EDT	Areal Flood Warning	PHI	Chester	4 hr
Apr 7, 11:27 PM EDT	Areal Flood Warning	PHI	Philadelphia	4 hr
Apr 7, 11:44 PM EDT	Areal Flood Warning	PHI	Montgomery, Philadelphia	3 hr
Apr 8, 12:36 AM EDT	Areal Flood Warning	PHI	Lehigh	7 hr
Apr 8, 12:46 AM EDT	Areal Flood Warning	PHI	Berks	6 hr
Apr 8, 3:29 AM EDT	Areal Flood Warning	PHI	Monroe	19 hr
Apr 8, 12:08 PM EDT	River Flood Warning	PHI	Monroe, Northampton	17 hr
Apr 8, 2:49 PM EDT	River Flood Warning	PHI	Northampton	20 hr
Apr 8, 2:50 PM EDT	River Flood Warning	PHI	Bucks	20 hr

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.