Alert archive / Pennsylvania / River Flood Warnings in 2013

River Flood Warning 3, NWS Philadelphia/Mount Holly

January 31, 2013Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Jan 31, 2013, 4:42 AM EST for Montgomery County, Pennsylvania. It took effect at Jan 31, 2013, 6:04 AM EST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jan 31, 2013, 4:42 AM EST (09:42 UTC)
In effect from: Jan 31, 2013, 6:04 AM EST
Expired: Jan 31, 2013, 2:13 PM EST
In force: 8 hr
Issued by: NWS Philadelphia/Mount Holly
Flood severity: Minor

County Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 09:45 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 Perkiomen Creek at Graterford (GRAP1). The gauge peaked at 12.48 ft at Jan 31, 2013, 8:00 AM EST.

Action stage: 8 ft
Minor stage: 11 ft
Moderate stage: 13 ft
Major stage: 16 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01473000, 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.

154 
WGUS41 KPHI 310942
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
442 AM EST THU JAN 31 2013

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

  PERKIOMEN CREEK AT GRATERFORD AFFECTING MONTGOMERY COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC091-311542-
/O.NEW.KPHI.FL.W.0003.130131T1400Z-130201T0206Z/
/GRAP1.1.ER.130131T1400Z.130131T1800Z.130131T2006Z.NO/
442 AM EST THU JAN 31 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE PERKIOMEN CREEK AT GRATERFORD.
* FROM THIS MORNING TO THIS EVENING...OR UNTIL THE WARNING IS CANCELLED.
* AT 4:31 AM THURSDAY THE STAGE WAS 9.3 FEET. 
* FLOOD STAGE IS 11.0 FEET. 
* MINOR FLOODING IS FORECAST. 
* FORECAST...RISE ABOVE FLOOD STAGE BY LATE THIS MORNING AND CONTINUE TO RISE TO
  NEAR 12.4 FEET BY THIS AFTERNOON. THE RIVER WILL FALL BELOW FLOOD STAGE BY 
  LATE THIS AFTERNOON.
* IMPACT...AT 12.0 FEET...PENITENTIARY BRIDGE IS CLOSED. FLOODING BEGINS IN 
  COLLEGEVILLE. HOUSES ON THE RIGHT BANK IN GRATERFORD TAKE ON WATER.

$$

                   FLD     OBSERVED            FORECAST
 LOCATION          STG     STG  DAY TIME       CREST

PERKIOMEN CREEK
  GRATERFORD       11.0    9.30  THU 5 AM      12.4    THU 1 PM 

&&

3 follow-up statements

798 
WGUS41 KPHI 311106
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
606 AM EST THU JAN 31 2013

...FORECAST FLOODING CHANGED FROM MINOR TO MODERATE SEVERITY FOR THE FOLLOWING 
RIVERS IN PENNSYLVANIA...

  PERKIOMEN CREEK AT GRATERFORD AFFECTING MONTGOMERY COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC091-311706-
/O.EXT.KPHI.FL.W.0003.130131T1104Z-130201T0235Z/
/GRAP1.2.ER.130131T1013Z.130131T1800Z.130131T2035Z.NO/
606 AM EST THU JAN 31 2013

...FORECAST FLOODING INCREASED FROM MINOR TO MODERATE SEVERITY...
THE FLOOD WARNING CONTINUES FOR 
  THE PERKIOMEN CREEK AT GRATERFORD.
* FROM THIS MORNING TO THIS EVENING...OR UNTIL THE WARNING IS CANCELLED.
* AT 5:46 AM THURSDAY THE STAGE WAS 11.6 FEET. 
* FLOOD STAGE IS 11.0 FEET. 
* MINOR FLOODING IS OCCURRING AND MODERATE FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 13.0 FEET BY THIS AFTERNOON.
  THE RIVER WILL FALL BELOW FLOOD STAGE LATE THIS AFTERNOON.
* IMPACT...AT 13.0 FEET...THE SEWAGE TREATMENT PLANT IN SWENKSVILLE FLOODS.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

PERKIOMEN CREEK
  GRATERFORD       11.0   11.65  THU 6 AM     13.0    THU 1 PM 

&&

044 
WGUS81 KPHI 311458
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
958 AM EST THU JAN 31 2013

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN PENNSYLVANIA...
 
  PERKIOMEN CREEK AT GRATERFORD AFFECTING MONTGOMERY COUNTY 
...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN PENNSYLVANIA...
  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.

&&

PAC091-010058-
/O.EXT.KPHI.FL.W.0003.000000T0000Z-130201T0136Z/
/GRAP1.1.ER.130131T1013Z.130131T1315Z.130131T1936Z.NO/
958 AM EST THU JAN 31 2013

THE FLOOD WARNING CONTINUES FOR
  THE PERKIOMEN CREEK AT GRATERFORD.
* AT  9:31 AM THURSDAY THE STAGE WAS 12.4 FEET. 
* FLOOD STAGE IS 11.0 FEET. 
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO BELOW FLOOD STAGE BY THIS 
  AFTERNOON.
* IMPACT...AT 12.0 FEET...PENITENTIARY BRIDGE IS CLOSED. FLOODING BEGINS IN 
  COLLEGVILLE. HOUSES ON THE RIGHT BANK IN GRATERFORD TAKE ON WATER

$$

PAC029-091-101-010058-
/O.CON.KPHI.FL.W.0004.000000T0000Z-130201T1030Z/
/NRSP1.1.ER.130131T1320Z.130131T1800Z.130201T0430Z.NO/
958 AM EST THU JAN 31 2013

THE FLOOD WARNING CONTINUES FOR
  THE SCHUYLKILL RIVER AT NORRISTOWN.
* AT  9:30 AM THURSDAY THE STAGE WAS 13.5 FEET. 
* FLOOD STAGE IS 13.0 FEET. 
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 14.5 FEET BY THIS AFTERNOON.
  THE RIVER WILL FALL BELOW FLOOD STAGE TONIGHT.
* IMPACT...AT 15.0 FEET...RIVER ROAD IN WEST CONSHOHOCKEN BEGINS TO FLOOD. THE 
  LOWER GARAGES AT THE RIVERVIEW LANDING AND THE LOFTS AT VALLEY FORGE START TO 
  TAKE ON WATER. THE LOWER SECTION OF PORT INDAIN ROAD IN WEST NORRITON BECOMES 
  IMPASSABLE.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

SCHUYLKILL RIVER
  NORRISTOWN       13.0   13.53  THU 9 AM    14.5    THU 1 PM 

PERKIOMEN CREEK
  GRATERFORD       11.0   12.37  THU 10 AM   12.2    THU 1 PM 

&&

344 
WGUS81 KPHI 311913
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
213 PM EST THU JAN 31 2013

...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN PENNSYLVANIA...
 
  PERKIOMEN CREEK AT GRATERFORD AFFECTING MONTGOMERY COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC091-311943-
/O.CAN.KPHI.FL.W.0003.000000T0000Z-130201T0136Z/
/GRAP1.1.ER.130131T1013Z.130131T1315Z.130131T1831Z.NO/
213 PM EST THU JAN 31 2013

THE FLOOD WARNING IS CANCELLED FOR
  THE PERKIOMEN CREEK AT GRATERFORD.
* AT  2:00 PM THURSDAY THE STAGE WAS 10.4 FEET. 
* FLOOD STAGE IS 11.0 FEET. 
* FELL BELOW FLOOD STAGE AT  1:31 PM THURSDAY.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO 4.8 FEET BY TOMORROW MORNING.
* IMPACT...AT 10.0 FEET...THE FIRST EVACUATIONS BEGIN IN SWENKSVILLE UPSTREAM OF 
  THE GAGE

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

PERKIOMEN CREEK
  GRATERFORD       11.0   10.43  THU 2 PM     7.7    THU 7 PM 

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 30, 7:38 PM EST	Special Weather Statement	PHI	Chester	67 min
Jan 30, 8:15 PM EST	Special Weather Statement	PHI	Chester, Delaware, Montgomery	60 min
Jan 30, 8:22 PM EST	Special Weather Statement	PHI	Berks, Lehigh	68 min
Jan 30, 9:36 PM EST	Special Weather Statement	PHI	Delaware, Philadelphia	114 min
Jan 30, 9:50 PM EST	Special Weather Statement	PHI	Bucks	115 min
Jan 30, 11:29 PM EST	Special Weather Statement	PHI	Bucks, Delaware, Philadelphia	2 hr
Jan 31, 12:10 AM EST	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	4 hr
Jan 31, 12:34 AM EST	Special Weather Statement	PHI	Berks, Carbon, Chester, Lehigh, Monroe, Montgomery and 1 more	116 min
Jan 31, 1:34 AM EST	Special Weather Statement	PHI	Bucks, Delaware, Philadelphia	116 min
Jan 31, 2:06 AM EST	Areal Flood Advisory	PHI	Bucks, Chester, Lehigh, Monroe, Montgomery, Northampton	4 hr
Jan 31, 2:20 AM EST	Special Weather Statement	PHI	Chester, Lehigh, Monroe, Montgomery, Northampton	55 min
Jan 31, 2:56 AM EST	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Jan 31, 3:15 AM EST	Special Weather Statement	PHI	Bucks, Philadelphia	2 hr
Jan 31, 4:00 AM EST	Areal Flood Warning	PHI	Berks, Chester, Montgomery	10 hr
Jan 31, 4:58 AM EST	Areal Flood Warning	PHI	Bucks	9 hr
Jan 31, 6:00 AM EST	Areal Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	6 hr
Jan 31, 6:01 AM EST	Wind Advisory	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	12 hr
Jan 31, 6:17 AM EST	Areal Flood Warning	PHI	Northampton	6 hr
Jan 31, 8:14 AM EST	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	12 hr
Jan 31, 11:47 AM EST	Areal Flood Warning	PHI	Montgomery, Philadelphia	4 hr
Jan 31, 1:21 PM EST	River Flood Warning	PHI	Chester, Delaware	7 hr
Jan 31, 6:56 PM EST	Special Weather Statement	PHI	Northampton	94 min

Nearby

River Flood Warnings in Pennsylvania, 2013 Every river flood warning in 2013

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.