Alert archive / Delaware / River Flood Warnings in 2009

River Flood Warning 20, NWS Philadelphia/Mount Holly

December 9, 2009New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this river flood warning at Dec 9, 2009, 7:54 AM EST for New Castle County, Delaware. It took effect at Dec 9, 2009, 9:18 AM EST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Dec 9, 2009, 7:54 AM EST (12:54 UTC)
In effect from: Dec 9, 2009, 9:18 AM EST
Expired: Dec 9, 2009, 4:04 PM EST
In force: 7 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 12:58 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 14.12 ft at Dec 9, 2009, 12:00 PM 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.

000 
WGUS41 KPHI 091254
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
754 AM EST WED DEC 09 2009

...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.

&&

DEC003-091854-
/O.NEW.KPHI.FL.W.0020.091209T1418Z-091209T2213Z/
/DPKD1.1.ER.091209T1418Z.091209T1500Z.091209T1613Z.NO/
754 AM EST WED DEC 09 2009

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 7:15 AM WEDNESDAY THE STAGE WAS 11.1 FEET. 
* MINOR FLOODING IS FORECAST. 
* FLOOD STAGE IS 13.0 FEET. 
* FORECAST...RISE ABOVE FLOOD STAGE TO NEAR 13.7 FEET BY LATE THIS
  MORNING. THE RIVER WILL FALL BELOW
  FLOOD STAGE BY LATE THIS MORNING.
* IMPACT...AT 13.5 FEET...BUSINESSES IN THE AREA BEGIN TO FLOOD.

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

WHITE CLAY CREEK
  NEWARK           13.0   11.11  WED 7 AM    13.7  WED 10 AM

&&

2 follow-up statements

000 
WGUS81 KPHI 091829
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
129 PM EST WED DEC 09 2009

...THE FLOOD WARNING CONTINUES 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.

&&

DEC003-100136-
/O.EXT.KPHI.FL.W.0020.000000T0000Z-091210T0136Z/
/DPKD1.1.ER.091209T1341Z.091209T1700Z.091209T1936Z.NO/
129 PM EST WED DEC 09 2009

...FLOOD WARNING EXTENDED UNTIL THIS EVENING...THE FLOOD WARNING 
CONTINUES FOR
  THE WHITE CLAY CREEK NEAR NEWARK.
* UNTIL THIS EVENING...OR UNTIL THE WARNING IS CANCELLED.
* AT 1:15 PM WEDNESDAY THE STAGE WAS 13.9 FEET. 
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST. 
* FLOOD STAGE IS 13.0 FEET.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO BELOW FLOOD STAGE BY 
  THIS EVENING.
* IMPACT...AT 13.5 FEET...BUSINESSES IN THE AREA BEGIN TO FLOOD.

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

WHITE CLAY CREEK
  NEWARK           13.0   13.91  WED 1 PM    13.5  WED 2 PM 

&&

000 
WGUS81 KPHI 092104
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
404 PM EST WED DEC 09 2009

...THE FLOOD WARNING IS CANCELLED 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.

&&

DEC003-092134-
/O.CAN.KPHI.FL.W.0020.000000T0000Z-091210T0136Z/
/DPKD1.1.ER.091209T1341Z.091209T1700Z.091209T1940Z.NO/
404 PM EST WED DEC 09 2009

* AT 3:30 PM WEDNESDAY THE STAGE WAS 12.2 FEET. 
* NO FLOODING IS CURRENTLY FORECAST.
* FLOOD STAGE IS 13.0 FEET. 
* 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   12.22  WED 3 PM     FALLING 

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 9, 5:04 AM EST	Wind Advisory	PHI	Sussex	4 hr
Dec 9, 5:43 AM EST	River Flood Warning	PHI	New Castle	9 hr
Dec 9, 6:53 AM EST	Areal Flood Warning	PHI	New Castle	8 hr
Dec 9, 7:08 AM EST	Areal Flood Advisory	PHI	Kent, Sussex	4 hr
Dec 9, 8:44 AM EST	River Flood Warning	PHI	New Castle	5 hr
Dec 9, 12:00 PM EST	Wind Advisory	PHI	Kent, New Castle, Sussex	33 hr
Dec 9, 2:26 PM EST	Coastal Flood Advisory	PHI	New Castle	7 hr
Dec 9, 2:55 PM EST	Areal Flood Warning	PHI	New Castle	7 hr
Dec 9, 4:55 PM EST	Areal Flood Warning	PHI	Sussex	6 hr

Nearby

River Flood Warnings in Delaware, 2009 Every river flood warning in 2009

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.