Alert archive / Pennsylvania / River Flood Warnings in 2012

River Flood Warning 3, NWS Philadelphia/Mount Holly

September 3, 2012Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Sep 3, 2012, 4:19 AM EDT for Delaware County, Pennsylvania. It took effect at Sep 3, 2012, 5:12 AM EDT. It was in force for 38 min.

The area

The counties it named.

The facts

Issued: Sep 3, 2012, 4:19 AM EDT (08:19 UTC)
In effect from: Sep 3, 2012, 5:12 AM EDT
Expired: Sep 3, 2012, 5:50 AM EDT
In force: 38 min
Issued by: NWS Philadelphia/Mount Holly
Flood severity: Minor

County Delaware County, PA

The radar

The Philadelphia radar (KDIX), 84 km from the middle of the area, began a volume at 08:23 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 Chester Creek near Chester (CHSP1). The gauge peaked at 8.92 ft at Sep 3, 2012, 7:00 PM EDT.

Action stage: 7 ft
Minor stage: 8 ft
Moderate stage: 10 ft
Major stage: 14 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01477000, 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, in the capitals the NWS used until 2016.

848 
WGUS41 KPHI 030820
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
419 AM EDT MON SEP 3 2012

...THE NATIONAL WEATHER SERVICE HAS ISSUED A FLOOD WARNING FOR
   CHESTER CREEK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS.
THE WATER MAY BE DEEPER THAN YOU THINK IT IS.

&&

PAC045-031419-
/O.NEW.KPHI.FL.W.0003.120903T0912Z-120903T1631Z/
/CHSP1.1.ER.120903T0912Z.120903T1000Z.120903T1031Z.NO/
419 AM EDT MON SEP 3 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE CHESTER CREEK NEAR CHESTER.
* UNTIL LATE THIS MORNING...OR UNTIL THE WARNING IS CANCELLED.
* AT 4:00 AM...THE STAGE WAS 6.5 FEET AND RISING. 
* FLOOD STAGE IS 8.0 FEET. 
* MINOR FLOODING IS FORECAST. 
* FORECAST...THE CREEK SHOULD RISE ABOVE FLOOD STAGE EARLY THIS
  MORNING...CRESTING AROUND 8.5 FEET. THE RIVER IS FORECAST TO 
  FALL BACK BELOW FLOOD STAGE BY MID MORNING.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

CHESTER CREEK
  CHESTER          8.0    6.46  MON 400 AM    8.5    MON 600 AM 

&&

IOVINO

1 follow-up statement

460 
WGUS81 KPHI 030950
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
550 AM EDT MON SEP 3 2012

...THE FLOOD WARNING IS CANCELLED FOR THE CHESTER CREEK...

&&

PAC045-031020-
/O.CAN.KPHI.FL.W.0003.000000T0000Z-120903T1631Z/
/CHSP1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
550 AM EDT MON SEP 3 2012

THE FLOOD WARNING IS CANCELLED FOR
  THE CHESTER CREEK NEAR CHESTER.
* AT 5:30 AM...THE STAGE WAS 6.4 FEET AND FALLING. 
* FLOOD STAGE IS 8.0 FEET. 
* FORECAST...A RAPID RISE WORKED ITS WAY DOWN THE CHESTER CREEK DURING
  THE NIGHT AS A RESULT OF HEAVY RAINFALL IN THE HEADWATERS. THE
  CREEK LEVEL CRESTED AT 7.1 FEET AROUND 4:45 AM. THE LEVEL OF THE
  CREEK WILL CONTINUE TO FALL AND FLOODING IS NO LONGER EXPECTED.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

CHESTER CREEK
  CHESTER          8.0    6.40  MON 530 AM    CRESTED 

&&

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 3, 12:24 AM EDT	Areal Flood Advisory	PHI	Chester, Delaware	3 hr
Sep 3, 12:58 AM EDT	Flash Flood Warning	PHI	Chester, Delaware	5 hr
Sep 3, 4:44 AM EDT	Areal Flood Advisory	PHI	Chester, Montgomery	3 hr
Sep 3, 6:24 AM EDT	Areal Flood Warning	PHI	Chester	4 hr
Sep 3, 8:05 AM EDT	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery, Philadelphia	3 hr
Sep 3, 8:23 AM EDT	Flash Flood Warning	PHI	Delaware	82 min
Sep 3, 9:15 AM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery	3 hr
Sep 3, 10:28 AM EDT	Special Weather Statement	PHI	Philadelphia	62 min
Sep 3, 11:14 AM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery, Philadelphia	2 hr
Sep 3, 12:04 PM EDT	Areal Flood Warning	PHI	Chester	4 hr
Sep 3, 2:44 PM EDT	Areal Flood Advisory	PHI	Chester	119 min
Sep 3, 3:00 PM EDT	Flash Flood Watch	PHI	Delaware, Philadelphia	49 hr
Sep 3, 5:27 PM EDT	Areal Flood Warning	PHI	Delaware	3 hr
Sep 3, 6:41 PM EDT	River Flood Warning	PHI	Delaware	2 hr

Nearby

River Flood Warnings in Pennsylvania, 2012 Every river flood warning in 2012

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.