Alert archive / Delaware / Flash Flood Warnings in 2002

Flash Flood Warning 37, NWS Philadelphia/Mount Holly

December 11, 2002New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Dec 11, 2002, 8:30 PM EST for New Castle County, Delaware. It was in force for 3 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
Dec 11, 2002, 8:30 PM EST (01:30 UTC)
Expired
Dec 11, 2002, 11:00 PM EST
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County New Castle County, DE

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.5 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 00:00Z on 2002-12-12Temperature 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 00:00Z on 2002-12-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -58 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
359 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
-58 m²/s²
0-3 km storm-relative helicity
3 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.3

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 120130
FFWPHI
DEC003-120400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
755 PM EST WED DEC 11 2002

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS CONTINUED THE

* FLASH FLOOD WARNING FOR...
  NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE

* UNTIL 1100 PM EST.

* ALTHOUGH MODERATE TO HEAVY RAIN HAS ENDED OVER THE CHRISTINA       
  RIVER...THE COMBINATION OF SNOW MELT AND RAIN EARLIER IN THE DAY   
  HAVE PRODUCED A STAGE OF 11.42 FEET. FLOOD STAGE IS 9 FEET.

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE
TELEVISION OUTLET.

$$

WARNING RETRANSMITTED


LAT...LON 3982 7567 3981 7548 3965 7566 3957 7563
          3956 7577 3971 7576

KRUZDLO

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 11, 7:55 PM ESTFlash Flood WarningPHINew Castle3 hr

Nearby

Flash Flood Warnings in Delaware, 2002Every flash flood warning in 2002

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.