Alert archive / Delaware / Flash Flood Warnings in 1996

Flash Flood Warning 12, NWS Philadelphia/Mount Holly

March 20, 1996New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Mar 20, 1996, 12:01 AM 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
Mar 20, 1996, 12:01 AM EST (05:01 UTC)
Expired
Mar 20, 1996, 3:15 AM 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, 5.0 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 1996-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 19 joules per kilogram.LCLLFCEL10008507005003002001001 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 1996-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -139 square meters per square second.1939587897Sfc1 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
19 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
504 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
-139 m²/s²
0-3 km storm-relative helicity
-196 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 200505 COR
FFWPHL
DEC003-201100-

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING...CORRECTION
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
1201 AM EST WED MAR 20 1996

THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS EXTENDED
THE FLOOD WARNING UNTIL 600 AM EST FOR PEOPLE IN THE FOLLOWING
LOCATION...

IN DELAWARE

   ...NORTHERN NEW CASTLE COUNTY

AT 1201 AM...THE GAGE READING ON THE CHRISTINA RIVER AT COOCHS BRIDGE WAS
10.45 FT. FLOOD STAGE IS 9 FT. THE RIVER HAS CRESTED AND SHOULD GO BELOW
FLOOD STAGE BY MORNING.

IF YOU ARE IN AN AREA PRONE TO FLOODING...MOVE TO HIGHER GROUND
IMMEDIATELY...BEFORE YOUR ACCESS IS CUT OFF BY RISING FLOOD WATERS.
CONTINUE TO MONITOR NOAA WEATHER RADIO OR YOUR LOCAL RADIO AND
TELEVISION STATIONS FOR THE LATEST INFORMATION ON THE FLOOD WARNING.

DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS.  THE DEPTH OF THE
WATER MAY BE HIGHER THAN YOU THINK.  RAPIDLY RISING WATERS CAN
QUICKLY ENGULF YOUR VEHICLE AND ITS OCCUPANTS...WASHING THEM AWAY.
REMEMBER...MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.

AVOID AREAS WHICH ARE ALREADY FLOODED.  IF YOU COME ACROSS A
FLOODED STREAM...WHERE THE WATER IS ABOVE YOUR ANKLES...STOP.
DO NOT ATTEMPT TO CROSS THE STREAM BECAUSE ITS FLOW MAY BE
STRONGER THAN YOU THINK.  YOU COULD BE WASHED AWAY.


RNS
&

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 19, 9:15 PM ESTFlash Flood WarningPHINew Castle3 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.