Alert archive / Delaware / River Flood Warnings in 2023

River Flood Warning 31, NWS Philadelphia/Mount Holly

December 10, 2023New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this river flood warning at Dec 10, 2023, 10:21 PM EST for New Castle County, Delaware. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Dec 10, 2023, 10:21 PM EST (03:21 UTC)
Expired
Dec 11, 2023, 3:57 AM EST
In force
6 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
Minor

County New Castle County, DE

The radar

The Dover AFB radar (KDOX), 95 km from the middle of the area, began a volume at 03:20 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 Christina River at Coochs Bridge (CHBD1). The gauge peaked at 10.99 ft at Dec 11, 2023, 12:00 AM EST.

actionminormoderatemajor51012/1112/12
Action stage
9 ft
Minor stage
11 ft
Moderate stage
12 ft
Major stage
13 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01478000, 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.

647 
WGUS41 KPHI 110321
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
1021 PM EST Sun Dec 10 2023

...The National Weather Service in Mount Holly NJ has issued a Flood 
Warning for the following rivers in Delaware...

  Christina River At Coochs Bridge affecting New Castle County.



For the Christina River...including Coochs Bridge...Minor flooding 
is forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Additional information is available at www.weather.gov/phi.

The next statement will be issued late tonight at 400 AM EST.

&&

DEC003-110900-
/O.NEW.KPHI.FL.W.0031.231211T0321Z-231211T0900Z/
/CHBD1.1.ER.231211T0439Z.231211T0600Z.231211T0737Z.NO/
1021 PM EST Sun Dec 10 2023

...FLOOD WARNING IN EFFECT FROM THIS EVENING TO LATE TONIGHT...

* WHAT...Minor flooding is forecast.

* WHERE...Christina River at Coochs Bridge.

* WHEN...From this evening to late tonight.

* IMPACTS...At 9.0 feet, Flooding begins in fields and floodplain 
  adjacent to the river.
  At 11.0 feet, Flooding begins in the town of Christiana. East Main 
  Street (Del 7) begins to flood as does Water Street. Meadow Road 
  near New Castle Airport is subject to flooding. Barksdale Road 
  near Casho Mill Road is also subject to flooding as are 
  residential backyards.
  At 11.5 feet, Portions of Duross Heights near New Castle Airport 
  begin to flood including Don Avenue. Airport Road at the New 
  Castle Airport begins to flood as the Christina River backs up the 
  Nonesuch Creek. Walther Road in the Bear area also floods. 
  Flooding also occurs around Smalley's Pond Dam in Christiana.
  At 12.0 feet, Significant flooding occurs on Meadow Road in 
  Christiana. Roads are closed. Homes are flooded. Salem Church Road 
  and Reybold Road floods in Christiana also flood and are subject 
  to closures. Residential backyards can flood in this area. 
  Flooding also occurs in Newark on West Chestnut Hill Road and 
  South College Avenue.

* ADDITIONAL DETAILS...
  - At 10:00 PM EST Sunday the stage was 10.7 feet.
  - Bankfull stage is 9.0 feet.
  - Forecast...The river is expected to rise above flood stage
    late this evening to a crest of 11.4 feet just after midnight
    tonight. It will then fall below flood stage just after
    midnight tonight.
  - Flood stage is 11.0 feet.
  - Flood History...This crest compares to a previous crest of
    11.4 feet on 04/17/2011.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (10 pm)       Crest
Location        Stg   Stg Day/Time    Mon  Tue        Stg Time Date

Christina River
Coochs Bridge   11.0  10.7 Sun 10 p   8.2  MSG        11.4 1am 12/11


&&

LAT...LON 3964 7578 3970 7578 3965 7570 3968 7565
      3968 7557 3959 7569


$$

Hoeflich
1 follow-up statement
694 
WGUS81 KPHI 110857
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
357 AM EST Mon Dec 11 2023

...The Flood Warning is cancelled for the following rivers in 
Delaware...

  Christina River At Coochs Bridge affecting New Castle County.



DEC003-111000-
/O.CAN.KPHI.FL.W.0031.000000T0000Z-231211T0857Z/
/CHBD1.1.ER.231211T0515Z.231211T0530Z.231211T0530Z.NO/
357 AM EST Mon Dec 11 2023

...FLOOD WARNING IS CANCELLED...

The Flood Warning is cancelled for
  the Christina River At Coochs Bridge.

* ADDITIONAL DETAILS...
  - At 3:15 AM EST Monday the stage was 10.2 feet and receding.
  - Bankfull stage is 9.0 feet.
  - Forecast...The river rose to a crest of 11.0 feet at 12:15 am
    this morning and is now receding.
  - http://www.weather.gov/safety/flood

&&

Stream          Fld   Observed        Fcsts (4 am)        Crest
Location        Stg   Stg Day/Time    Tue  Wed        Stg Time Date

Christina River
Coochs Bridge   11.0  10.2 Mon 3 am   7.9  MSG        10.6 4am 12/11


&&

LAT...LON 3964 7578 3970 7578 3965 7570 3968 7565
      3968 7557 3959 7569


$$

MJL

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 7:08 PM ESTAreal Flood AdvisoryPHINew Castle4 hr

Nearby

River Flood Warnings in Delaware, 2023Every river flood warning in 2023

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.