Alert archive / Delaware / River Flood Warnings in 2008

River Flood Warning 45, NWS Philadelphia/Mount Holly

December 12, 2008New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this river flood warning at Dec 12, 2008, 4:31 AM EST for New Castle County, Delaware. It took effect at Dec 12, 2008, 4:58 AM EST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Dec 12, 2008, 4:31 AM EST (09:31 UTC)
In effect from: Dec 12, 2008, 4:58 AM EST
Expired: Dec 12, 2008, 1:03 PM EST
In force: 8 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 09:33 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 12.90 ft at Dec 12, 2008, 6:00 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.

000 
WGUS41 KPHI 120931
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
431 AM EST FRI DEC 12 2008

...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

...MINOR FLOODING IS FORECAST FOR THE WHITE CLAY CREEK...

DEC003-121531-
/O.NEW.KPHI.FL.W.0045.081212T0958Z-081212T1803Z/
/DPKD1.1.ER.081212T0958Z.081212T1100Z.081212T1203Z.NO/
431 AM EST FRI DEC 12 2008

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 4:15 AM FRIDAY THE STAGE WAS 12.6 FEET. 
* MINOR FLOODING IS FORECAST. 
* FLOOD STAGE IS 13.0 FEET. 
* FORECAST...RISE ABOVE FLOOD STAGE EARLY 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   12.62  FRI 4 AM    13.1  FRI 6 AM 

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 11, 7:46 PM EST	Areal Flood Advisory	PHI	New Castle	9 hr
Dec 11, 9:32 PM EST	Areal Flood Warning	PHI	New Castle	12 hr
Dec 11, 9:39 PM EST	River Flood Warning	PHI	New Castle	14 hr
Dec 12, 4:19 AM EST	River Flood Warning	PHI	New Castle	8 hr
Dec 12, 9:00 AM EST	Coastal Flood Advisory	PHI	New Castle	6 hr

Nearby

River Flood Warnings in Delaware, 2008 Every river flood warning in 2008

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.