Alert archive / Pennsylvania / River Flood Warnings in 2024
River Flood Warning 97, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this river flood warning at Aug 9, 2024, 5:56 PM EDT for Chester County, Pennsylvania. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2024, 5:56 PM EDT (21:56 UTC)
- Expired
- Aug 9, 2024, 11:58 PM 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 21:58 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 10.76 ft at Aug 9, 2024, 2:00 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.
636
WGUS41 KPHI 092156
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
556 PM EDT Fri Aug 9 2024
...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.
Caution is urged when walking near riverbanks.
Additional information is available at www.weather.gov/phi.
The next statement will be issued late tonight at midnight EDT.
&&
PAC029-100400-
/O.NEW.KPHI.FL.W.0097.240809T2156Z-240810T0400Z/
/DWNP1.1.ER.240809T2130Z.000000T0000Z.240809T2148Z.NO/
556 PM EDT Fri Aug 9 2024
...FLOOD WARNING IN EFFECT FROM THIS AFTERNOON TO JUST AFTER
MIDNIGHT TONIGHT...
* WHAT...Minor flooding is occurring.
* WHERE...East Branch Brandywine Creek below Downingtown.
* WHEN...From this afternoon to just after midnight tonight.
* 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 5:45 PM EDT Friday the stage was 7.3 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 5:45 PM EDT Friday was 10.8 feet.
- Forecast...The river is expected to fall to 4.1 feet tomorrow
evening.
- 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 (6 pm) Crest
Location Stg Stg Day/Time Sat Sun Stg Time Date
East Branch Bran
Downingtown 7.0 7.3 Fri 5 pm 4.1 MSG
&&
LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574
$$
MJL2 follow-up statements
553
WGUS81 KPHI 092215
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
615 PM EDT Fri Aug 9 2024
...Forecast flooding changed to Minor severity and increased in
duration for the following rivers in Pennsylvania...
East Branch Brandywine Creek Below Downingtown affecting Chester
County.
For the Brandywine Creek...including Downingtown, Chadds Ford,
Wilmington...Minor flooding is forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Caution is urged when walking near riverbanks.
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 Saturday morning at 800 AM EDT.
&&
PAC029-101200-
/O.EXT.KPHI.FL.W.0097.000000T0000Z-240810T1200Z/
/DWNP1.1.ER.240809T2130Z.000000T0000Z.240810T0947Z.NO/
615 PM EDT Fri Aug 9 2024
...FLOOD WARNING NOW IN EFFECT UNTIL TOMORROW MORNING...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...East Branch Brandywine Creek below Downingtown.
* WHEN...Until tomorrow 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 5:45 PM EDT Friday the stage was 7.3 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 5:45 PM EDT Friday was 10.8 feet.
- Forecast...The river is expected to rise to a crest of 8.4
feet late this evening. It will then fall below flood stage
late tonight.
- Flood stage is 7.0 feet.
- Flood History...This crest compares to a previous crest of
8.4 feet on 04/08/2022.
- http://www.weather.gov/safety/flood
&&
Stream Fld Observed Fcsts (6 pm) Crest
Location Stg Stg Day/Time Sat Sun Stg Time Date
East Branch Bran
Downingtown 7.0 7.3 Fri 5 pm 5.7 MSG 8.4 9pm 8/09
&&
LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574
$$
MJL832
WGUS81 KPHI 100358
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
1158 PM EDT Fri Aug 9 2024
...The Flood Warning is cancelled for the following rivers in
Pennsylvania...
East Branch Brandywine Creek Below Downingtown affecting Chester
County.
PAC029-100500-
/O.CAN.KPHI.FL.W.0097.000000T0000Z-240810T0358Z/
/DWNP1.1.ER.240809T2130Z.000000T0000Z.240810T0141Z.NO/
1158 PM EDT Fri Aug 9 2024
...FLOOD WARNING IS CANCELLED...
The Flood Warning is cancelled for
the East Branch Brandywine Creek Below Downingtown.
* ADDITIONAL DETAILS...
- At 11:45 PM EDT Friday the stage was 6.0 feet.
- Forecast...The river is expected to fall to 5.0 feet Sunday
morning.
- http://www.weather.gov/safety/flood
&&
Stream Fld Observed Fcsts (12 am) Crest
Location Stg Stg Day/Time Sun Mon Stg Time Date
East Branch Bran
Downingtown 7.0 6.0 Fri 11 p 5.1 MSG Crested
&&
LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 8:52 PM EDT | Flash Flood Warning | PHI | Berks, Chester | 3 hr |
| Aug 8, 9:06 PM EDT | River Flood Warning | PHI | Chester | 9 hr |
| Aug 8, 11:40 PM EDT | Areal Flood Warning | PHI | Chester | 4 hr |
| Aug 9, 12:12 AM EDT | River Flood Warning | PHI | Chester, Delaware | 16 hr |
| Aug 9, 2:50 PM EDT | Flash Flood Warning | PHI | Lehigh, Northampton | 2 hr |
| Aug 9, 3:31 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 108 min |
| Aug 9, 3:50 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 2 hr |
| Aug 9, 4:11 PM EDT | Flash Flood Warning | PHI | Northampton | 100 min |
| Aug 9, 5:30 PM EDT | Flash Flood Warning | PHI | Bucks | 83 min |
| Aug 9, 6:46 PM EDT | Areal Flood Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 4 hr |
Nearby
River Flood Warnings in Pennsylvania, 2024Every river flood warning in 2024
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.