Alert archive / Pennsylvania / River Flood Warnings in 2016

River Flood Warning 4, NWS Philadelphia/Mount Holly

February 24, 2016Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Feb 24, 2016, 10:11 PM EST for Chester County, Pennsylvania. It took effect at Feb 24, 2016, 10:22 PM EST. It was in force for 20 hr.

The area

The outline as issued.

The facts

Issued: Feb 24, 2016, 10:11 PM EST (03:11 UTC)
In effect from: Feb 24, 2016, 10:22 PM EST
Expired: Feb 25, 2016, 6:08 PM EST
In force: 20 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: Moderate

County Chester County, PA

The radar

The Philadelphia radar (KDIX), 109 km from the middle of the area, began a volume at 03:11 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 11.07 ft at Feb 25, 2016, 2:00 AM EST.

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.

528 
WGUS41 KPHI 250311
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1011 PM EST WED FEB 24 2016

...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...

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

&&

PAC029-250911-
/O.NEW.KPHI.FL.W.0004.160225T0322Z-160225T2308Z/
/DWNP1.2.ER.160225T0322Z.160225T0900Z.160225T1708Z.NO/
1011 PM EST WED FEB 24 2016

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The East Branch Brandywine Creek at Downingtown.
* until Thursday evening...Or until the warning is cancelled.
* At 9:45 PM Wednesday the stage was 6.6 feet.
* Flood stage is 7.0 feet.
* Moderate flooding is forecast.
* Forecast...Rise above flood stage this evening and continue to rise to near
  9.1 feet overnight. 


                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG   DAY TIME     CREST

Brandywine Creek
  Downingtown            7.0    6.56  Wed 10 PM    9.1    Thu 4 AM 
 
&&
 
LAT...LON 4001 7574 3991 7567 3993 7561 4002 7567
                                      

$$

Kruzdlo

2 follow-up statements

534 
WGUS41 KPHI 250603
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
103 AM EST THU FEB 25 2016

...Forecast flooding changed from Moderate to Major severity for
the following rivers in Pennsylvania...

  East Branch Brandywine Creek Below Downingtown affecting Chester County

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-251203-
/O.EXT.KPHI.FL.W.0004.000000T0000Z-160225T2117Z/
/DWNP1.3.ER.160225T0258Z.160225T0900Z.160225T1517Z.NO/
103 AM EST THU FEB 25 2016

...Forecast flooding increased from Moderate to Major severity...
The Flood Warning continues for 
 The East Branch Brandywine Creek at Downingtown.
* until this afternoon...or until the warning is cancelled.
* At 12:45 AM Thursday the stage was 10.3 feet.
* Flood stage is 7.0 feet.
* Moderate flooding is occurring and Major flooding is forecast.
* Forecast...The river will continue rising to near 11.7 feet early this 
  morning. The river will fall below flood stage later this morning.


                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG   DAY TIME     CREST

Brandywine Creek
  Downingtown            7.0   10.28  Thu 1 AM     11.7    Thu 4 AM 
 
&&
 
LAT...LON 4001 7574 3991 7567 3993 7561 4002 7567
                                      

$$

Kruzdlo

819 
WGUS81 KPHI 251203
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
703 AM EST THU FEB 25 2016

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

  East Branch Brandywine Creek Below Downingtown affecting Chester County

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC029-251233-
/O.CAN.KPHI.FL.W.0004.000000T0000Z-160225T2117Z/
/DWNP1.3.ER.160225T0258Z.160225T0732Z.160225T1056Z.NO/
703 AM EST THU FEB 25 2016

The Flood Warning is cancelled for
  The East Branch Brandywine Creek at Downingtown.
* At  6:45 AM Thursday the stage was 6.2 feet.
* Flood stage is 7.0 feet.
* Fell below flood stage at  5:56 AM Thursday.
* Forecast...The river will continue to fall to 4.0 feet by tomorrow morning.


                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Brandywine Creek
  Downingtown            7.0    6.24  Thu 7 AM     5.6    Thu 8 AM 
 
&&
 
LAT...LON 4001 7574 3991 7567 3993 7561 4002 7567
                                      

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 24, 7:12 PM EST	Severe Thunderstorm Warning	PHI	Chester, Delaware	33 min
Feb 24, 7:21 PM EST	Areal Flood Advisory	PHI	Chester	4 hr
Feb 24, 7:35 PM EST	Areal Flood Advisory	PHI	Carbon, Monroe	6 hr
Feb 24, 7:39 PM EST	Severe Thunderstorm Warning	PHI	Berks, Chester	36 min
Feb 24, 8:13 PM EST	Special Weather Statement	PHI	Chester, Montgomery	62 min
Feb 24, 8:23 PM EST	Special Weather Statement	PHI	Lehigh, Monroe, Northampton	67 min
Feb 24, 8:42 PM EST	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Lehigh, Monroe, Montgomery and 2 more	4 hr
Feb 24, 8:47 PM EST	Severe Thunderstorm Warning	PHI	Chester	43 min
Feb 24, 9:18 PM EST	Areal Flood Advisory	PHI	Bucks	4 hr
Feb 24, 9:40 PM EST	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	35 min
Feb 24, 9:44 PM EST	Areal Flood Warning	PHI	Berks, Chester, Montgomery	10 hr
Feb 24, 9:55 PM EST	Flash Flood Warning	PHI	Bucks, Lehigh, Monroe, Northampton	4 hr
Feb 24, 10:05 PM EST	Flash Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Feb 24, 10:32 PM EST	Flash Flood Warning	PHI	Bucks	4 hr
Feb 24, 11:03 PM EST	Severe Thunderstorm Warning	PHI	Bucks	42 min
Feb 25, 12:19 AM EST	River Flood Warning	PHI	Montgomery	14 hr
Feb 25, 12:28 AM EST	River Flood Warning	PHI	Chester, Delaware	18 hr
Feb 25, 12:37 AM EST	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	28 hr
Feb 25, 1:55 AM EST	Areal Flood Warning	PHI	Bucks, Lehigh, Monroe, Northampton	6 hr
Feb 25, 2:04 AM EST	Areal Flood Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	4 hr
Feb 25, 2:07 AM EST	River Flood Warning	PHI	Berks, Montgomery	8 hr
Feb 25, 2:22 AM EST	Areal Flood Warning	PHI	Bucks	8 hr
Feb 25, 7:41 AM EST	Areal Flood Warning	PHI	Berks, Chester, Montgomery	6 hr
Feb 25, 7:51 AM EST	Areal Flood Warning	PHI	Bucks, Lehigh, Monroe, Northampton	6 hr

Nearby

River Flood Warnings in Pennsylvania, 2016 Every river flood warning in 2016

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.