Alert archive / Pennsylvania / River Flood Warnings in 2020

River Flood Warning 10, NWS Philadelphia/Mount Holly

April 13, 2020Chester County, Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Apr 13, 2020, 12:29 PM EDT for Chester County, Delaware County, Pennsylvania. It took effect at Apr 13, 2020, 4:00 PM EDT. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: Apr 13, 2020, 12:29 PM EDT (16:29 UTC)
In effect from: Apr 13, 2020, 4:00 PM EDT
Expired: Apr 14, 2020, 12:55 AM EDT
In force: 9 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: Minor

Counties Chester County, PA, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 102 km from the middle of the area, began a volume at 16:32 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 Brandywine Creek at Chadds Ford (CDFP1). The gauge peaked at 9.36 ft at Apr 13, 2020, 9:00 PM EDT.

Action stage: 8 ft
Minor stage: 9 ft
Moderate stage: 11 ft
Major stage: 13 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01481000, 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.

469 
WGUS41 KPHI 131629
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mt Holly NJ
1229 PM EDT Mon Apr 13 2020

...The National Weather Service in Mount Holly NJ has issued a 
flood warning for the following rivers in Pennsylvania...

  Brandywine Creek At Chadds Ford affecting Chester and Delaware
  Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. 
The water may be deeper than you think.

&&

PAC029-045-132228-
/O.NEW.KPHI.FL.W.0010.200413T2000Z-200414T1127Z/
/CDFP1.1.ER.200413T2000Z.200414T0000Z.200414T0527Z.NO/
1229 PM EDT Mon Apr 13 2020

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The Brandywine Creek at Chadds Ford.
* From this afternoon to Tuesday morning...or until the warning is
  cancelled.
* At 11:30 AM Monday the stage was 6.8 feet.
* Flood stage is 9.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage by late this afternoon and 
  continue to rise to near 10.0 feet by this evening. The river will 
  fall below flood overnight.
* Impact...At 10.0 feet...The intersections of Creek Road and Route
  926 near Pocopson floods upstream of Chadds Ford.
* Flood history...This crest compares to a previous crest of 10.0 
  feet on Apr 14 2010.  
 
&&

                         FLD    OBSERVED            FORECAST
 LOCATION                STG    STG   DAY TIME      CREST

Brandywine Creek
  Chadds Ford            9.0    6.82  Mon 11 AM     10.0    Mon 8 PM 
 
&&
 
LAT...LON 3993 7561 3982 7553 3979 7560 3991 7567
                                      

$$

Kruzdlo

2 follow-up statements

944 
WGUS81 KPHI 132210
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
610 PM EDT Mon Apr 13 2020

...The Flood Warning continues for the Brandywine Creek at
Chadds Ford...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas.
The water may be deeper than you think it is.

&&

PAC029-045-140651-
/O.EXT.KPHI.FL.W.0010.000000T0000Z-200414T0651Z/
/CDFP1.1.ER.200413T2300Z.200414T0000Z.200414T0051Z.NO/
610 PM EDT Mon Apr 13 2020

The Flood Warning continues for
  The Brandywine Creek at Chadds Ford.
* At 5:30 PM, the creek level was 8.79 feet.
* Flood stage is 9.0 feet.
* Minor flooding is forecast.
* Forecast...The creek is forecast to rise above flood stage
  this evening, reaching 9.2 feet. The creek should fall back
  below flood stage overnight.
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Chadds Ford            9.0    8.79  Mon 530 PM   9.2   Mon 8 PM 
 
&&
 
LAT...LON 3993 7561 3982 7553 3979 7560 3991 7567                                     

$$

Iovino

524 
WGUS81 KPHI 140455
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
1255 AM EDT Tue Apr 14 2020

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

  Brandywine Creek At Chadds Ford affecting Chester and Delaware Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. The water may be
deeper than you think.

&&

PAC029-045-140525-
/O.CAN.KPHI.FL.W.0010.000000T0000Z-200414T0651Z/
/CDFP1.1.ER.200413T2230Z.200414T0130Z.200414T0349Z.NO/
1255 AM EDT Tue Apr 14 2020

The Flood Warning is cancelled for
  The Brandywine Creek at Chadds Ford.
* At 12:30 AM Tuesday the stage was 8.7 feet.
* Flood stage is 9.0 feet.
* Fell below flood stage at 11:49 PM Monday.
* Forecast...The river will continue to fall to 4.0 feet by tomorrow morning.
* Impact...At 8.0 feet...Open adjacent land next to the creek floods.

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Chadds Ford            9.0    8.69  Tue 12 AM    Crested 
 
&&
 
LAT...LON 3993 7561 3982 7553 3979 7560 3991 7567
                                      

$$

Johnson

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 6:11 AM EDT	Areal Flood Advisory	PHI	Berks, Chester, Delaware, Montgomery	4 hr
Apr 13, 6:48 AM EDT	Areal Flood Advisory	PHI	Delaware, Montgomery, Philadelphia	4 hr
Apr 13, 8:03 AM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Apr 13, 10:58 AM EDT	River Flood Warning	PHI	Chester	6 hr
Apr 13, 11:09 AM EDT	Areal Flood Warning	PHI	Chester, Delaware	3 hr
Apr 13, 1:01 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	4 hr
Apr 13, 1:07 PM EDT	Flash Flood Warning	PHI	Berks, Carbon, Lehigh, Northampton	4 hr
Apr 13, 1:27 PM EDT	Severe Thunderstorm Warning	PHI	Chester	33 min
Apr 13, 1:47 PM EDT	Flash Flood Warning	PHI	Chester	3 hr
Apr 13, 2:23 PM EDT	Areal Flood Warning	PHI	Montgomery, Philadelphia	4 hr
Apr 13, 2:37 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more	2 hr
Apr 13, 2:41 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	64 min
Apr 13, 4:35 PM EDT	Areal Flood Warning	PHI	Montgomery	2 hr

Nearby

River Flood Warnings in Pennsylvania, 2020 Every river flood warning in 2020

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.