Alert archive / Pennsylvania / River Flood Warnings in 2022

River Flood Warning 26, NWS Philadelphia/Mount Holly

September 6, 2022Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Sep 6, 2022, 8:07 AM EDT for Chester County, Pennsylvania. It took effect at Sep 6, 2022, 9:16 AM EDT. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Sep 6, 2022, 8:07 AM EDT (12:07 UTC)
In effect from
Sep 6, 2022, 9:16 AM EDT
Expired
Sep 6, 2022, 11:57 AM EDT
In force
3 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 12:06 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 6.48 ft at Sep 6, 2022, 10:00 AM EDT.

actionminormoderate24681009/0609/07
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.

408 
WGUS41 KPHI 061207
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
807 AM EDT Tue Sep 6 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...

Motorists should not attempt to drive around barricades or drive 
cars through flooded areas.

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

The next statement will be issued this afternoon by 545 PM EDT.

&&


PAC029-062145-
/O.NEW.KPHI.FL.W.0026.220906T1316Z-220906T2134Z/
/DWNP1.1.ER.220906T1316Z.220906T1400Z.220906T1533Z.NO/
807 AM EDT Tue Sep 6 2022

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

* WHAT...Minor flooding is forecast.

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

* WHEN...Until late 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 7:45 AM EDT Tuesday the stage was 5.9 feet.
  - Forecast...The river is expected to rise above flood stage
    this morning to a crest of 7.5 feet. 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
    7.2 feet on 03/01/2021.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (8 am)        Crest
Location        Stg   Stg Day/Time    Wed  Thu        Stg Time Date

East Branch Bran
Downingtown     7.0   5.9  Tue 7 am   3.1  MSG        7.5 10am 9/06


&&

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


$$

Iovino
1 follow-up statement
656 
WGUS81 KPHI 061557
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
1157 AM EDT Tue Sep 6 2022

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

  East Branch Brandywine Creek Below Downingtown affecting Chester 
  County.

PAC029-061700-
/O.CAN.KPHI.FL.W.0026.000000T0000Z-220906T1557Z/
/DWNP1.1.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
1157 AM EDT Tue Sep 6 2022

...FLOOD WARNING IS CANCELLED...

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

* ADDITIONAL DETAILS...
  - At 11:45 AM EDT Tuesday the stage was 6.3 feet.
  - Forecast...The river is expected to fall to 3.3 feet late
    Wednesday morning.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (12 pm)       Crest
Location        Stg   Stg Day/Time    Wed  Thu        Stg Time Date

East Branch Bran
Downingtown     7.0   6.3  Tue 11 a   3.3  MSG        Crested    


&&

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


$$

Iovino

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 6, 5:11 AM EDTAreal Flood AdvisoryPHIBerks, Chester, Delaware, Montgomery4 hr
Sep 6, 6:32 AM EDTFlash Flood WarningPHIChester, Montgomery4 hr
Sep 6, 6:55 AM EDTFlash Flood WarningPHIChester, Delaware, Montgomery, Philadelphia4 hr
Sep 6, 6:58 AM EDTAreal Flood AdvisoryPHIBerks116 min
Sep 6, 7:00 AM EDTAreal Flood AdvisoryPHILehigh, Northampton114 min
Sep 6, 7:15 AM EDTAreal Flood AdvisoryPHIBucks3 hr
Sep 6, 7:50 AM EDTAreal Flood AdvisoryPHIDelaware, Philadelphia4 hr

Nearby

River Flood Warnings in Pennsylvania, 2022Every 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.