Alert archive / Delaware / River Flood Warnings in 2012

River Flood Warning 22, NWS Philadelphia/Mount Holly

December 21, 2012New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this river flood warning at Dec 21, 2012, 8:49 AM EST for New Castle County, Delaware. It took effect at Dec 21, 2012, 8:54 AM EST. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Dec 21, 2012, 8:49 AM EST (13:49 UTC)
In effect from: Dec 21, 2012, 8:54 AM EST
Expired: Dec 21, 2012, 11:44 AM EST
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Flood severity: Minor

County New Castle County, DE

The radar

The Dover AFB radar (KDOX), 85 km from the middle of the area, began a volume at 13:49 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 White Clay Creek near Newark (DPKD1). The gauge peaked at 12.95 ft at Dec 21, 2012, 9:00 AM EST.

Action stage: 11 ft
Minor stage: 13 ft
Moderate stage: 15 ft
Major stage: 16.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01479000, 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.

258 
WGUS41 KPHI 211349
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
849 AM EST FRI DEC 21 2012

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

  WHITE CLAY CREEK NEAR NEWARK AFFECTING NEW CASTLE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

DEC003-211949-
/O.NEW.KPHI.FL.W.0022.121221T1354Z-121221T2228Z/
/DPKD1.1.ER.121221T1354Z.121221T1500Z.121221T1628Z.NO/
849 AM EST FRI DEC 21 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE WHITE CLAY CREEK NEAR NEWARK.
* UNTIL THIS AFTERNOON...OR UNTIL THE WARNING IS CANCELLED.
* AT 8:15 AM FRIDAY THE STAGE WAS 12.5 FEET. 
* FLOOD STAGE IS 13.0 FEET.
* MINOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE BY MID MORNING AND CONTINUE TO RISE TO NEAR
  13.2. THE RIVER WILL FALL BELOW FLOOD STAGE BY LATE THIS MORNING.
* IMPACT...AT 13.3 FEET...DELAWARE ROUTE 7 BEGINS TO FLOOD.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

WHITE CLAY CREEK
  NEWARK           13.0   12.51  FRI 8 AM     13.2    FRI 10 AM

&&

1 follow-up statement

066 
WGUS81 KPHI 211644
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1144 AM EST FRI DEC 21 2012

...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN PENNSYLVANIA...
DELAWARE...
 
  CHESTER CREEK NEAR CHESTER AFFECTING DELAWARE COUNTY
  RED CLAY CREEK AT WOODDALE AFFECTING NEW CASTLE COUNTY
  WHITE CLAY CREEK NEAR NEWARK AFFECTING NEW CASTLE COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC045-211714-
/O.CAN.KPHI.FL.W.0020.000000T0000Z-121221T2037Z/
/CHSP1.1.ER.121221T1108Z.121221T1200Z.121221T1315Z.NO/
1144 AM EST FRI DEC 21 2012

THE FLOOD WARNING IS CANCELLED FOR
  THE CHESTER CREEK NEAR CHESTER.
* AT 11:31 AM FRIDAY THE STAGE WAS 6.3 FEET. 
* FLOOD STAGE IS 8.0 FEET.
* FELL BELOW FLOOD STAGE AT 8:15 AM FRIDAY.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO 2.5 FEET BY TOMORROW MORNING.

$$

DEC003-211714-
/O.CAN.KPHI.FL.W.0021.000000T0000Z-121221T2214Z/
/RCCD1.1.ER.121221T1308Z.121221T1345Z.121221T1445Z.NO/
1144 AM EST FRI DEC 21 2012

THE FLOOD WARNING IS CANCELLED FOR
  THE RED CLAY CREEK AT WOODDALE.
* AT 11:16 AM FRIDAY THE STAGE WAS 6.3 FEET. 
* FLOOD STAGE IS 7.0 FEET.
* FELL BELOW FLOOD STAGE AT 9:45 AM FRIDAY.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO 2.9 FEET BY TOMORROW MORNING.
* IMPACT...AT 7.5 FEET...BARLEY MILL ROAD BEGINS TO FLOOD

$$

DEC003-211714-
/O.CAN.KPHI.FL.W.0022.000000T0000Z-121221T2228Z/
/DPKD1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
1144 AM EST FRI DEC 21 2012

THE FLOOD WARNING IS CANCELLED FOR
  THE WHITE CLAY CREEK NEAR NEWARK.
* AT 11:16 AM FRIDAY THE STAGE WAS 12.2 FEET. 
* FLOOD STAGE IS 13.0 FEET.
* FORECAST...THE RIVER CRESTED BELOW FLOOD STAGE AT 12.9 FEET. THE RIVER WILL 
  CONTINUE TO FALL TO 5.6 FEET BY TOMORROW MORNING.
* IMPACT...AT 13.3 FEET...DELAWARE ROUTE 7 BEGINS TO FLOOD.

$$

                   FLD     OBSERVED           FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

CHESTER CREEK
  CHESTER          8.0    6.27  FRI 12 PM     CRESTED AND FALLING

WHITE CLAY CREEK
  NEWARK           13.0   12.17  FRI 11 AM    CRESTED AND FALLING

RED CLAY CREEK
  WOODDALE         7.0    6.28  FRI 11 AM     CRESTED AND FALLING

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 20, 9:11 PM EST	Wind Advisory	PHI	Kent, New Castle, Sussex	12 hr
Dec 21, 12:27 AM EST	Coastal Flood Warning	PHI	Kent, New Castle	11 hr
Dec 21, 5:33 AM EST	Areal Flood Warning	PHI	New Castle	4 hr
Dec 21, 7:10 AM EST	River Flood Warning	PHI	New Castle	5 hr
Dec 21, 7:56 AM EST	River Flood Warning	PHI	New Castle	4 hr
Dec 21, 3:16 PM EST	Wind Advisory	PHI	Kent, New Castle, Sussex	27 hr

Nearby

River Flood Warnings in Delaware, 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.