Alert archive / Pennsylvania / River Flood Warnings in 2012

River Flood Warning 10, NWS Philadelphia/Mount Holly

October 29, 2012Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Oct 29, 2012, 11:21 AM EDT for Chester County, Pennsylvania. It took effect at Oct 29, 2012, 5:00 PM EDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Oct 29, 2012, 11:21 AM EDT (15:21 UTC)
In effect from: Oct 29, 2012, 5:00 PM EDT
Expired: Oct 30, 2012, 7:57 AM EDT
In force: 15 hr
Issued by: NWS Philadelphia/Mount Holly
Flood severity: Major

County Chester County, PA

The radar

The Philadelphia radar (KDIX), 114 km from the middle of the area, began a volume at 15:24 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 11.26 ft at Oct 29, 2012, 10:00 PM EDT.

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, in the capitals the NWS used until 2016.

246 
WGUS41 KPHI 291521
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1121 AM EDT MON OCT 29 2012

...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.

&&

PAC029-292121-
/O.NEW.KPHI.FL.W.0010.121029T2100Z-121030T1920Z/
/DWNP1.3.ER.121029T2100Z.121030T0400Z.121030T1320Z.NO/
1121 AM EDT MON OCT 29 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* FROM THIS AFTERNOON TO TUESDAY AFTERNOON...OR UNTIL THE WARNING IS CANCELLED.
* AT 10:45 AM MONDAY THE STAGE WAS 3.0 FEET. 
* FLOOD STAGE IS 7.0 FEET.
* MAJOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE BY LATE THIS AFTERNOON AND CONTINUE TO RISE 
  TO NEAR 12.3 FEET BY AFTER MIDNIGHT TONIGHT. THE RIVER WILL FALL BELOW FLOOD 
  STAGE BY LATE TOMORROW MORNING.


$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

BRANDYWINE CREEK
  DOWNINGTOWN      7.0    3.04  MON 11 AM   12.3    TUE 12 AM

&&

3 follow-up statements

480 
WGUS81 KPHI 292025
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
425 PM EDT MON OCT 29 2012

...THE FLOOD WARNING CONTINUES 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.

&&

PAC029-300625-
/O.CON.KPHI.FL.W.0010.121029T2100Z-121030T1920Z/
/DWNP1.3.ER.121029T2100Z.121030T0400Z.121030T1320Z.NO/
425 PM EDT MON OCT 29 2012

THE FLOOD WARNING CONTINUES FOR
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* UNTIL TUESDAY AFTERNOON...OR UNTIL THE WARNING IS CANCELLED.
* AT 3:45 PM MONDAY THE STAGE WAS 4.9 FEET. 
* FLOOD STAGE IS 7.0 FEET.
* MAJOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE BY LATE THIS AFTERNOON AND CONTINUE TO RISE 
  TO NEAR 12.3 FEET BY AFTER MIDNIGHT TONIGHT. THE RIVER WILL FALL BELOW FLOOD 
  STAGE BY LATE TOMORROW MORNING.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

BRANDYWINE CREEK
  DOWNINGTOWN      7.0    4.86  MON 4 PM      12.3  TUE 12 AM

&&

982 
WGUS81 KPHI 300222
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1022 PM EDT MON OCT 29 2012

...THE FLOOD WARNING CONTINUES 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.

&&

PAC029-301222-
/O.EXT.KPHI.FL.W.0010.000000T0000Z-121030T1823Z/
/DWNP1.3.ER.121029T2052Z.121030T0400Z.121030T1223Z.NO/
1022 PM EDT MON OCT 29 2012

THE FLOOD WARNING CONTINUES FOR
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* UNTIL TUESDAY AFTERNOON...OR UNTIL THE WARNING IS CANCELLED.
* AT 9:45 PM MONDAY THE STAGE WAS 11.1 FEET. 
* FLOOD STAGE IS 7.0 FEET.
* MAJOR FLOODING IS OCCURRING AND MAJOR FLOODING IS FORECAST. 
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 11.7 FEET BY AFTER MIDNIGHT 
  TONIGHT. THE RIVER WILL FALL BELOW FLOOD STAGE TOMORROW MORNING.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

BRANDYWINE CREEK
  DOWNINGTOWN      7.0   11.09  MON 10 PM   11.7    TUE 12 AM

&&

094 
WGUS81 KPHI 301158
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
757 AM EDT TUE OCT 30 2012

...THE FLOOD WARNING IS CANCELLED FOR THE EAST BRANCH BRANDYWINE
CREEK...

&&

PAC029-301227-
/O.CAN.KPHI.FL.W.0010.000000T0000Z-121030T1823Z/
/DWNP1.3.ER.121029T2052Z.121030T0230Z.121030T1047Z.NO/
757 AM EDT TUE OCT 30 2012

THE FLOOD WARNING IS CANCELLED FOR
  THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* AT 7:45 AM, THE STAGE WAS 6.7 FEET AND FALLING. 
* FLOOD STAGE IS 7.0 FEET. 
* THE CREEK FELL BELOW FLOOD STAGE BELOW DOWNINGTOWN AT 6:47 AM.


$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

BRANDYWINE CREEK
  DOWNINGTOWN      7.0    6.7  TUE 745 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 29, 7:40 AM EDT	Areal Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	23 hr
Oct 29, 11:15 AM EDT	River Flood Warning	PHI	Chester, Delaware	33 hr
Oct 29, 11:29 AM EDT	River Flood Warning	PHI	Delaware	19 hr
Oct 29, 11:34 AM EDT	River Flood Warning	PHI	Bucks	18 hr
Oct 29, 11:34 AM EDT	River Flood Warning	PHI	Montgomery	18 hr
Oct 29, 4:28 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	2 hr
Oct 29, 4:48 PM EDT	Areal Flood Warning	PHI	Berks	14 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.