Alert archive / Delaware / River Flood Warnings in 2009

River Flood Warning 34, NWS Philadelphia/Mount Holly

December 26, 2009New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this river flood warning at Dec 26, 2009, 12:37 PM EST for New Castle County, Delaware. It took effect at Dec 26, 2009, 12:55 PM EST. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Dec 26, 2009, 12:37 PM EST (17:37 UTC)
In effect from
Dec 26, 2009, 12:55 PM EST
Expired
Dec 26, 2009, 6:25 PM EST
In force
6 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 17:36 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 13.21 ft at Dec 26, 2009, 4:00 PM EST.

actionminormoderate5101512/2612/27
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 261737
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1237 PM EST SAT DEC 26 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.

&&

DEC003-262337-
/O.NEW.KPHI.FL.W.0034.091226T1755Z-091227T0637Z/
/DPKD1.1.ER.091226T1755Z.091226T2000Z.091227T0037Z.NO/
1237 PM EST SAT DEC 26 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE WHITE CLAY CREEK NEAR NEWARK.
* UNTIL LATE TONIGHT...OR UNTIL THE WARNING IS CANCELLED.
* AT 12:15 PM SATURDAY THE STAGE WAS 12.6 FEET. 
* MINOR FLOODING IS FORECAST.
* FLOOD STAGE IS 13.0 FEET.
* FORECAST...RISE ABOVE FLOOD STAGE EARLY THIS AFTERNOON AND CONTINUE
  TO RISE TO NEAR 13.5 FEET BY LATE THIS AFTERNOON. THE RIVER WILL FALL 
  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   12.64  SAT 12 PM   13.5  SAT 3 PM 

&&
1 follow-up statement
000 
WGUS81 KPHI 262325
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
625 PM EST SAT DEC 26 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.

&&

DEC003-262355-
/O.CAN.KPHI.FL.W.0034.000000T0000Z-091227T0637Z/
/DPKD1.1.ER.091226T1808Z.091226T2015Z.091226T2252Z.NO/
625 PM EST SAT DEC 26 2009

THE FLOOD WARNING IS CANCELLED FOR
  THE WHITE CLAY CREEK NEAR NEWARK.
* AT 6:15 PM SATURDAY THE STAGE WAS 12.9 FEET. 
* FELL BELOW FLOOD STAGE AT 5:52 PM SATURDAY.
* FLOOD STAGE IS 13.0 FEET.
* FORECAST...THE RIVER WILL CONTINUE TO FALL THROUGH TOMORROW 
  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   12.87  SAT 6 PM     CRESTED EARLIER 

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 26, 2:34 AM ESTRiver Flood WarningPHINew Castle18 hr
Dec 26, 7:42 AM ESTCoastal Flood AdvisoryPHIKent, New Castle, Sussex15 hr
Dec 26, 10:28 AM ESTAreal Flood WarningPHINew Castle20 hr
Dec 26, 3:11 PM ESTRiver Flood WarningPHINew Castle3 hr

Nearby

River Flood Warnings in Delaware, 2009Every 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.