Alert archive / Pennsylvania / River Flood Warnings in 2018

River Flood Warning 24, NWS Philadelphia/Mount Holly

July 23, 2018Chester County, Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Jul 23, 2018, 7:00 AM EDT for Chester County, Delaware County, Pennsylvania. It took effect at Jul 23, 2018, 8:00 AM EDT. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Jul 23, 2018, 7:00 AM EDT (11:00 UTC)
In effect from: Jul 23, 2018, 8:00 AM EDT
Expired: Jul 23, 2018, 4:22 PM EDT
In force: 8 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 11:02 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 10.01 ft at Jul 23, 2018, 12:00 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.

963 
WGUS41 KPHI 231100
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mt Holly NJ
700 AM EDT Mon Jul 23 2018

...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.

&&

PAC029-045-231700-
/O.NEW.KPHI.FL.W.0024.180723T1200Z-180723T2131Z/
/CDFP1.1.ER.180723T1200Z.180723T1400Z.180723T1531Z.NO/
700 AM EDT Mon Jul 23 2018

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The Brandywine Creek at Chadds Ford.
* until this afternoon...Or until the warning is cancelled.
* At  6:30 AM Monday the stage was 8.1 feet.
* Flood stage is 9.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage by this morning and continue to rise to near
  9.8 feet by late this morning.the river will fall below flood stage by late 
  this morning.
* 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 9.8 feet on Apr 3 
  2005.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Chadds Ford            9.0    8.15  Mon 6 AM     9.8    Mon 10 AM
 
&&
 
LAT...LON 3993 7561 3982 7553 3979 7560 3991 7567
                                      

$$

SFJ

2 follow-up statements

992 
WGUS81 KPHI 231355
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
955 AM EDT Mon Jul 23 2018

...The Flood Warning continues 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.

&&

PAC029-045-232146-
/O.EXT.KPHI.FL.W.0024.000000T0000Z-180723T2146Z/
/CDFP1.1.ER.180723T1242Z.180723T1400Z.180723T1546Z.NO/
955 AM EDT Mon Jul 23 2018

The Flood Warning continues for
  The Brandywine Creek at Chadds Ford.
* At  9:30 AM Monday the stage was 9.5 feet.
* Flood stage is 9.0 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river will continue rising to near 9.8 feet by late this 
  morning. The river will fall below flood stage late this morning.
* 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 9.8 feet on Apr 3 
  2005.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Chadds Ford            9.0    9.47  Mon 9 AM     9.8    Mon 10 AM
 
&&
 
LAT...LON 3993 7561 3982 7553 3979 7560 3991 7567
                                      

$$

SFJ

890 
WGUS81 KPHI 232022
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
422 PM EDT Mon Jul 23 2018

...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.

&&

PAC029-045-232052-
/O.CAN.KPHI.FL.W.0024.000000T0000Z-180723T2146Z/
/CDFP1.1.ER.180723T1242Z.180723T1630Z.180723T1843Z.NO/
422 PM EDT Mon Jul 23 2018

The Flood Warning is cancelled for
  The Brandywine Creek at Chadds Ford.
* At  3:30 PM Monday the stage was 7.9 feet.
* Flood stage is 9.0 feet.
* Fell below flood stage at  2:43 PM Monday.
* Forecast...The river will continue to fall to 5.7 feet by tomorrow morning.
* Impact...At 8.0 feet...Open adjacent land next to the creek floods.
* Flood history...This crest compares to a previous crest of 9.2 feet on Apr 2 
  1998.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Chadds Ford            9.0    7.91  Mon 3 PM     8.9    Wed 8 PM 
 
&&
 
LAT...LON 3993 7561 3982 7553 3979 7560 3991 7567
                                      

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 8:18 PM EDT	Areal Flood Warning	PHI	Chester	117 min
Jul 22, 8:43 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jul 22, 8:54 PM EDT	Flash Flood Warning	PHI	Berks, Chester	4 hr
Jul 22, 9:40 PM EDT	Flash Flood Warning	PHI	Lehigh	3 hr
Jul 22, 10:21 PM EDT	Special Weather Statement	PHI	Monroe	54 min
Jul 22, 11:18 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe, Northampton	3 hr
Jul 23, 12:19 AM EDT	River Flood Warning	PHI	Chester	5 hr
Jul 23, 3:45 AM EDT	Flash Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	68 hr
Jul 23, 12:58 PM EDT	Special Weather Statement	PHI	Chester	32 min
Jul 23, 1:01 PM EDT	Areal Flood Advisory	PHI	Chester	34 min

Nearby

River Flood Warnings in Pennsylvania, 2018 Every river flood warning in 2018

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.