Alert archive / Pennsylvania / River Flood Warnings in 2012

River Flood Warning 18, NWS Philadelphia/Mount Holly

October 30, 2012Chester County, Montgomery County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Oct 30, 2012, 4:51 AM EDT for Chester County, Montgomery County, Philadelphia County, Pennsylvania. It took effect at Oct 30, 2012, 8:00 AM EDT. It was in force for 118 min.

The area

The counties it named.

The facts

Issued: Oct 30, 2012, 4:51 AM EDT (08:51 UTC)
In effect from: Oct 30, 2012, 8:00 AM EDT
Expired: Oct 30, 2012, 9:58 AM EDT
In force: 118 min
Issued by: NWS Philadelphia/Mount Holly
Flood severity: Minor

Counties Chester County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 87 km from the middle of the area, began a volume at 08:51 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 Schuylkill River at Norristown (NRSP1). The gauge peaked at 12.66 ft at Oct 30, 2012, 6:00 AM EDT.

Action stage: 12 ft
Minor stage: 13 ft
Moderate stage: 17 ft
Major stage: 19 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01473500, 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.

699
WGUS41 KPHI 300851
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
451 AM EDT TUE OCT 30 2012

...THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A FLOOD WARNING FOR
THE FOLLOWING RIVERS IN PENNSYLVANIA...

SCHUYLKILL RIVER AT POTTSTOWN AFFECTING MONTGOMERY COUNTY
SCHUYLKILL RIVER AT NORRISTOWN AFFECTING CHESTER...MONTGOMERY AND PHILADELPHIA
COUNTIES

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

PAC091-301451-
/O.NEW.KPHI.FL.W.0017.121030T2300Z-121031T0651Z/
/PTNP1.1.ER.121030T2300Z.121031T0000Z.121031T0051Z.NO/
451 AM EDT TUE OCT 30 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLOOD WARNING FOR
THE SCHUYLKILL RIVER AT POTTSTOWN.
* FROM THIS EVENING TO LATE TONIGHT...OR UNTIL THE WARNING IS CANCELLED.
* AT 3:15 AM TUESDAY THE STAGE WAS 8.9 FEET.
* FLOOD STAGE IS 12.5 FEET.
* MINOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE AND CONTINUE TO RISE TO NEAR 12.6 FEET THIS AFTERNOON. THE RIVER WILL FALL BELOW FLOOD STAGE BY THIS EVENING.
* IMPACT...AT 12.5 FEET...PORTIONS OF PA ROUTE 724 ALONG THE BERKS/CHESTER COUNTY
LINE BEGIN TO FLOOD, SPECIFICALLY UNION TOWNSHIP IN BERKS COUNTY AND NORTH
COVENTRY TOWNSHIP IN CHESTER COUNTY.

PAC029-091-101-301451-
/O.NEW.KPHI.FL.W.0018.121030T1200Z-121031T0945Z/
/NRSP1.1.ER.121030T1200Z.121030T1800Z.121031T0345Z.NO/
451 AM EDT TUE OCT 30 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLOOD WARNING FOR
THE SCHUYLKILL RIVER AT NORRISTOWN.
* FROM THIS MORNING TO LATE TONIGHT...OR UNTIL THE WARNING IS CANCELLED.
* AT 3:30 AM TUESDAY THE STAGE WAS 12.5 FEET.
* FLOOD STAGE IS 13.0 FEET.
* MINOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE BY THIS MORNING AND CONTINUE TO RISE TO NEAR
13.5 FEET BY LATE THIS AFTERNOON. THE RIVER WILL FALL BELOW FLOOD STAGE BY
TONIGHT.
* IMPACT...AT 13.0 FEET...WATER BEGINS TO COVER AND CLOSE RIVERVIEW BOULEVARD IN
WEST NORRITON.

FLD OBSERVED FORECAST
LOCATION STG STG DAY TIME CREST

SCHUYLKILL RIVER
POTTSTOWN 12.5 8.87 TUE 3 AM 12.6 TUE 8 PM
NORRISTOWN 13.0 12.50 TUE 3 AM 13.5 TUE 2 PM

2 follow-up statements

351 
WGUS81 KPHI 301029
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
629 AM EDT TUE OCT 30 2012

...THE FLOOD WARNING CONTINUES FOR THE SCHUYLKILL RIVER FROM
   AROUND POTTSTOWN TO NEAR NORRISTOWN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC091-302029-
/O.CON.KPHI.FL.W.0017.121030T2300Z-121031T0651Z/
/PTNP1.1.ER.121030T2300Z.121031T0000Z.121031T0051Z.NO/
629 AM EDT TUE OCT 30 2012

THE FLOOD WARNING CONTINUES FOR
  THE SCHUYLKILL RIVER AT POTTSTOWN.
* FROM THIS EVENING TO LATE TONIGHT...OR UNTIL THE WARNING IS CANCELLED.
* AT 5:45 AM, THE STAGE WAS 9.3 FEET AND RISING. 
* FLOOD STAGE IS 12.5 FEET. 
* MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER LEVEL SHOULD RISE ABOVE FLOOD STAGE LATE IN THE
  DAY, REACHING 12.6 FEET THIS EVENING. THE RIVER LEVEL IS EXPECTED TO
  FALL BACK BELOW FLOOD STAGE TONIGHT.
* IMPACT...AT 12.5 FEET...PORTIONS OF PA ROUTE 724 ALONG THE BERKS/CHESTER
  COUNTY LINE BEGIN TO FLOOD, SPECIFICALLY UNION TOWNSHIP IN BERKS COUNTY
  AND NORTH COVENTRY TOWNSHIP IN CHESTER COUNTY.

$$

PAC029-091-101-302028-
/O.CON.KPHI.FL.W.0018.121030T1200Z-121031T0945Z/
/NRSP1.1.ER.121030T1200Z.121030T1800Z.121031T0345Z.NO/
629 AM EDT TUE OCT 30 2012

THE FLOOD WARNING CONTINUES FOR
  THE SCHUYLKILL RIVER AT NORRISTOWN.
* UNTIL LATE TONIGHT...OR UNTIL THE WARNING IS CANCELLED.
* AT 5:30 AM, THE STAGE WAS 12.6 FEET AND RISING. 
* FLOOD STAGE IS 13.0 FEET. 
* MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER LEVEL SHOULD RISE ABOVE FLOOD STAGE THIS MORNING
  REACHING 13.5 FEET THIS AFTERNOON. THE RIVER LEVEL IS EXPECTED TO FALL
  BACK BELOW FLOOD TONIGHT.
* IMPACT...AT 13.0 FEET...WATER BEGINS TO COVER AND CLOSE RIVERVIEW
  BOULEVARD IN WEST NORRITON.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

SCHUYLKILL RIVER
  POTTSTOWN       12.5    9.3  TUE 545 AM     12.6  TUE 8 PM 
  NORRISTOWN      13.0  12.60  TUE 530 AM     13.5  TUE 2 PM 

&&

IOVINO

854 
WGUS81 KPHI 301358
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
958 AM EDT TUE OCT 30 2012

...THE FLOOD WARNING IS CANCELLED FOR THE SCHUYLKILL RIVER
FROM POTTSTOWN TO NORRISTOWN...

&&

PAC091-301428-
/O.CAN.KPHI.FL.W.0017.000000T0000Z-121031T0651Z/
/PTNP1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
958 AM EDT TUE OCT 30 2012

THE FLOOD WARNING IS CANCELLED FOR
  THE SCHUYLKILL RIVER AT POTTSTOWN.
* AT 9:30 AM, THE STAGE WAS 9.4 FEET AND CRESTING.
* FLOOD STAGE IS 12.5 FEET. 
* FORECAST...THE RIVER LEVEL WILL FALL SLOWLY AT POTTSTOWN.

$$

PAC029-091-101-301428-
/O.CAN.KPHI.FL.W.0018.000000T0000Z-121031T0945Z/
/NRSP1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
958 AM EDT TUE OCT 30 2012

THE FLOOD WARNING IS CANCELLED FOR
  THE SCHUYLKILL RIVER AT NORRISTOWN.
* AT 9:30 AM, THE STAGE WAS 12.4 FEET AND FALLING. 
* FLOOD STAGE IS 13.0 FEET. 
* FORECAST...THE RIVER CRESTED BELOW FLOOD STAGE AT 12.6 FEET. THE
  RIVER LEVEL WILL CONTINUE TO FALL.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

SCHUYLKILL RIVER
  POTTSTOWN        12.5    9.4  TUE 930 AM    CRESTING
  NORRISTOWN       13.0   12.4  TUE 930 AM    CRESTED

&&

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 30, 12:48 AM EDT	Areal Flood Advisory	PHI	Bucks, Carbon, Lehigh, Monroe, Northampton, Philadelphia	6 hr
Oct 30, 4:51 AM EDT	River Flood Warning	PHI	Montgomery	5 hr
Oct 30, 5:42 AM EDT	Areal Flood Warning	PHI	Chester	5 hr
Oct 30, 6:03 AM EDT	Coastal Flood Advisory	PHI	Delaware, Philadelphia	20 hr
Oct 30, 8:48 AM EDT	Wind Advisory	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	3 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.