Alert archive / Delaware / Flash Flood Warnings in 1996

Flash Flood Warning 138, NWS Philadelphia/Mount Holly

December 14, 1996New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Dec 14, 1996, 3:30 AM EST for New Castle County, Delaware. It was in force for 6 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 14, 1996, 3:30 AM EST (08:30 UTC)
Expired
Dec 14, 1996, 9:30 AM EST
In force
6 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, 8.5 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 1996-12-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 1996-12-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -73 square meters per square second.19395878Sfc1 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
508 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
-73 m²/s²
0-3 km storm-relative helicity
-80 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 
TTAA00 KPHL 140838
FFWPHL
DEC003-141435-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CONTINUED
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
330 AM EST SAT DEC 14 1996

THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY NJ HAS
ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 930 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN  DELAWARE

   ...NEW CASTLE COUNTY
 
NATIONAL WEATHER SERVICE DOPPLER RADAR HAS BEEN INDICATING HEAVY RAIN
THROUGHOUT NEW CASTLE COUNTY SINCE FRIDAY EVENING.  MORE THAN THREE
INCHES OF RAIN HAS BEEN ESTIMATED OVER THE COUNTY SINCE 1PM FRIDAY.
PONDING OF WATER IN LOW LYING AREAS IS POSING A THREAT THROUGHOUT
THE COUNTY. USE DISCRETION AND CAUTION WHEN DRIVING THROUGH
WATER ON THE HIGHWAYS...IT MAY BE DEEPER THAN YOU THINK.

STAY TUNED TO NOAA WEATHER RADIO...THE VOICE OF THE NATIONAL WEATHER
SERVICE...OR TO COMMERCIAL RADIO OR TELEVISION STATIONS FOR THE
LATEST STORM INFORMATION.
 
JJM

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 13, 10:05 PM ESTFlash Flood WarningPHINew Castle6 hr
Dec 13, 10:30 PM ESTFlash Flood WarningPHINew Castle6 hr

Nearby

Flash Flood Warnings in Delaware, 1996Every flash flood warning in 1996

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.