Alert archive / Delaware / Flash Flood Warnings in 2007

Flash Flood Warning 1, NWS Philadelphia/Mount Holly

January 1, 2007New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Jan 1, 2007, 8:10 AM EST for New Castle County, Delaware. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jan 1, 2007, 8:10 AM EST (13:10 UTC)
Expired
Jan 1, 2007, 10:15 AM EST
In force
2 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County New Castle County, DE

The radar

The Dover AFB radar (KDOX), 85 km from the middle of the area, began a volume at 13:11 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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 1.2 hours before the alert went out and 167 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2007-01-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2007-01-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 275 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
457 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
275 m²/s²
0-3 km storm-relative helicity
289 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS51 KPHI 011314
FFWPHI
DEC003-011515-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
810 AM EST MON JAN 1 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  THIS INCLUDES THE CITY OF WILMINGTON...

* UNTIL 1015 AM EST

* AT 806 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NORTH
  STAR...HOCKESSIN...GLASGOW...BEAR...WILMINGTON MANOR...STANTON...
  PIKE CREEK...NEWPORT...NEW CASTLE...ELSMERE AND BELLEFONTE

THE CHRISTINA RIVER AT COOCHS BRIDGE IS APPROACHING FLOOD STAGE OF 
10.5 FT AND WILL LIKELY CONTINUE TO RISE ABOVE FLOOD STAGE. MINOR 
FLOODING IS EXPECTED FOR A FEW HOURS THIS MORNING.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL MAY CAUSE FLOODING OF OTHER 
SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND 
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

LAT...LON 3951 7577 3952 7559 3981 7545 3978 7573

$$

AMC

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 1, 5:29 AM ESTCoastal Flood AdvisoryPHINew Castle, Sussex9 hr
Jan 1, 10:04 AM ESTFlash Flood WarningPHINew Castle3 hr

Nearby

Flash Flood Warnings in Delaware, 2007Every flash flood warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.