Alert archive / Pennsylvania / River Flood Warnings in 2023

River Flood Warning 15, NWS Philadelphia/Mount Holly

June 27, 2023Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Jun 27, 2023, 2:23 AM EDT for Chester County, Pennsylvania. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 27, 2023, 2:23 AM EDT (06:23 UTC)
Expired
Jun 27, 2023, 8:36 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 06:27 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).

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.

181 
WGUS41 KPHI 270623
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
223 AM EDT Tue Jun 27 2023

...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...

Be especially cautious at night when it is harder to recognize the 
dangers of flooding. 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 this morning by 700 AM EDT.

&&


PAC029-271100-
/O.NEW.KPHI.FL.W.0015.230627T0623Z-230627T1100Z/
/DWNP1.1.ER.230627T0529Z.230627T0900Z.230627T1551Z.NO/
223 AM EDT Tue Jun 27 2023

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

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

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

* WHEN...From early this morning to 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 1:45 AM EDT Tuesday the stage was 7.6 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 1:45 AM EDT Tuesday was 7.6 feet.
  - Forecast...The river is expected to rise to a crest of 8.8
    feet early this morning. It will then fall below flood stage
    late this morning.
  - Flood stage is 7.0 feet.
  - Flood History...This crest compares to a previous crest of
    9.0 feet on 04/03/2005.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (2 am)        Crest
Location        Stg   Stg Day/Time    Wed  Thu        Stg Time Date

East Branch Bran
Downingtown     7.0   7.6  Tue 1 am   3.4  MSG        8.8 5am 6/27


&&

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


$$

Staarmann
3 follow-up statements
830 
WGUS41 KPHI 270709
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
309 AM EDT Tue Jun 27 2023

...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...

Be especially cautious at night when it is harder to recognize the 
dangers of flooding. 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 this morning by 700 AM EDT.

&&


PAC029-271100-
/O.CON.KPHI.FL.W.0015.000000T0000Z-230627T1100Z/
/DWNP1.2.ER.230627T0529Z.230627T0900Z.230627T1648Z.NO/
309 AM EDT Tue Jun 27 2023

...FLOOD WARNING REMAINS IN EFFECT UNTIL THIS MORNING...

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

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

* WHEN...Until 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 2:45 AM EDT Tuesday the stage was 8.8 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 2:45 AM EDT Tuesday was 8.8 feet.
  - Forecast...The river is expected to rise to a crest of 9.3
    feet early this morning. It will then fall below flood stage
    this afternoon.
  - Flood stage is 7.0 feet.
  - Flood History...This crest compares to a previous crest of
    9.3 feet on 02/06/2004.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (3 am)        Crest
Location        Stg   Stg Day/Time    Wed  Thu        Stg Time Date

East Branch Bran
Downingtown     7.0   8.8  Tue 2 am   3.4  MSG        9.3 5am 6/27


&&

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


$$

Staarmann
436 
WGUS81 KPHI 270910
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
510 AM EDT Tue Jun 27 2023

...The Flood Warning is extended 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 this afternoon by 100 PM EDT.

&&


PAC029-271700-
/O.EXT.KPHI.FL.W.0015.000000T0000Z-230627T1700Z/
/DWNP1.2.ER.230627T0529Z.230627T1000Z.230627T1648Z.NO/
510 AM EDT Tue Jun 27 2023

...FLOOD WARNING NOW IN EFFECT UNTIL THIS AFTERNOON...

* WHAT...Moderate flooding is occurring and moderate flooding is 
  forecast.

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

* WHEN...Until 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.
  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 9.2 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 4:45 AM EDT Tuesday was 9.2 feet.
  - Forecast...The river is expected to rise to a crest of 9.2
    feet this morning. It will then fall below flood stage this
    afternoon.
  - 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 (5 am)        Crest
Location        Stg   Stg Day/Time    Wed  Thu        Stg Time Date

East Branch Bran
Downingtown     7.0   9.2  Tue 4 am   3.4  MSG        9.2 6am 6/27


&&

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


$$

Staarmann
397 
WGUS81 KPHI 271236
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
836 AM EDT Tue Jun 27 2023

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

  East Branch Brandywine Creek Below Downingtown affecting Chester 
  County.

PAC029-271345-
/O.CAN.KPHI.FL.W.0015.000000T0000Z-230627T1236Z/
/DWNP1.2.ER.230627T0529Z.230627T0830Z.230627T1127Z.NO/
836 AM EDT Tue Jun 27 2023

...FLOOD WARNING IS CANCELLED...

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

* ADDITIONAL DETAILS...
  - At 7:45 AM EDT Tuesday the stage was 6.7 feet.
  - Forecast...The river will fall to 3.2 feet later today.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (9 am)        Crest
Location        Stg   Stg Day/Time    Wed  Thu        Stg Time Date

East Branch Bran
Downingtown     7.0   6.7  Tue 7 am   3.3  MSG    Crested & 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.

IssuedProductOfficeCountiesLasted
Jun 26, 8:27 PM EDTSpecial Weather StatementPHIChester33 min
Jun 26, 8:33 PM EDTSpecial Weather StatementPHIPhiladelphia27 min
Jun 26, 8:36 PM EDTSpecial Weather StatementPHIBucks24 min
Jun 26, 8:40 PM EDTSevere Thunderstorm WarningPHIChester31 min
Jun 26, 8:42 PM EDTSevere Thunderstorm WarningPHIBucks48 min
Jun 26, 9:18 PM EDTSevere Thunderstorm WarningPHIBerks42 min
Jun 26, 9:30 PM EDTFlash Flood WarningPHIMonroe, Northampton3 hr
Jun 26, 9:47 PM EDTSevere Thunderstorm WarningPHIChester, Montgomery43 min
Jun 26, 9:51 PM EDTSevere Thunderstorm WarningPHIChester, Delaware, Philadelphia54 min
Jun 26, 9:58 PM EDTSevere Thunderstorm WarningPHIChester47 min
Jun 26, 10:33 PM EDTSevere Thunderstorm WarningPHIBucks, Chester, Delaware, Montgomery, Philadelphia42 min
Jun 26, 10:54 PM EDTAreal Flood AdvisoryPHIBerks, Chester, Delaware, Montgomery, Philadelphia3 hr
Jun 26, 11:07 PM EDTSevere Thunderstorm WarningPHIBucks, Philadelphia53 min
Jun 26, 11:27 PM EDTAreal Flood AdvisoryPHIBucks, Montgomery, Philadelphia3 hr
Jun 26, 11:35 PM EDTFlash Flood WarningPHIBucks, Chester, Delaware, Montgomery, Philadelphia6 hr
Jun 27, 12:00 AM EDTAreal Flood WarningPHIBucks, Lehigh, Monroe, Northampton7 hr
Jun 27, 12:51 AM EDTFlash Flood WarningPHIChester, Montgomery4 hr
Jun 27, 1:23 AM EDTSpecial Weather StatementPHIMontgomery37 min
Jun 27, 2:29 AM EDTSpecial Weather StatementPHIDelaware31 min
Jun 27, 3:01 AM EDTSpecial Weather StatementPHIDelaware, Montgomery, Philadelphia29 min
Jun 27, 3:02 AM EDTFlood WatchPHIBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more46 min
Jun 27, 3:26 AM EDTRiver Flood WarningPHIDelaware4 hr
Jun 27, 3:48 AM EDTFlood WatchPHIBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more17 hr
Jun 27, 3:54 AM EDTRiver Flood WarningPHIChester, Delaware5 hr
Jun 27, 6:14 AM EDTAreal Flood WarningPHIMontgomery, Philadelphia3 hr
Jun 27, 6:16 AM EDTAreal Flood WarningPHIChester, Delaware3 hr
Jun 27, 10:08 AM EDTRiver Flood WarningPHIChester, Delaware109 min
Jun 27, 12:45 PM EDTSpecial Weather StatementPHIBerks30 min
Jun 27, 2:13 PM EDTSevere Thunderstorm WarningPHIChester47 min
Jun 27, 2:18 PM EDTSevere Thunderstorm WarningPHICarbon, Monroe22 min
Jun 27, 2:21 PM EDTSpecial Weather StatementPHIBerks24 min
Jun 27, 2:42 PM EDTAreal Flood AdvisoryPHIBerks3 hr
Jun 27, 2:57 PM EDTAreal Flood AdvisoryPHIChester3 hr
Jun 27, 3:07 PM EDTSevere Thunderstorm WarningPHIBerks38 min
Jun 27, 3:25 PM EDTSevere Thunderstorm WarningPHIChester19 min
Jun 27, 3:33 PM EDTSpecial Weather StatementPHIDelaware27 min
Jun 27, 3:57 PM EDTSevere Thunderstorm WarningPHIChester, Delaware, Montgomery, Philadelphia48 min
Jun 27, 4:06 PM EDTSpecial Weather StatementPHINorthampton24 min
Jun 27, 4:24 PM EDTAreal Flood AdvisoryPHINorthampton3 hr
Jun 27, 4:30 PM EDTSevere Thunderstorm WarningPHIMontgomery, Philadelphia32 min
Jun 27, 4:33 PM EDTSevere Thunderstorm WarningPHIMonroe, Northampton42 min
Jun 27, 4:39 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery, Philadelphia51 min
Jun 27, 4:58 PM EDTAreal Flood AdvisoryPHIBucks, Montgomery, Philadelphia3 hr
Jun 27, 5:01 PM EDTSevere Thunderstorm WarningPHINorthampton44 min
Jun 27, 5:22 PM EDTSevere Thunderstorm WarningPHIBucks, Philadelphia38 min
Jun 27, 5:43 PM EDTSpecial Weather StatementPHIMonroe, Northampton32 min
Jun 27, 5:44 PM EDTFlash Flood WarningPHIBucks, Montgomery, Philadelphia5 hr
Jun 27, 5:52 PM EDTAreal Flood AdvisoryPHINorthampton3 hr
Jun 27, 5:57 PM EDTAreal Flood AdvisoryPHIBucks, Delaware, Philadelphia3 hr
Jun 27, 6:15 PM EDTSpecial Weather StatementPHINorthampton45 min

Nearby

River Flood Warnings in Pennsylvania, 2023Every river flood warning in 2023

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.