Alert archive / Delaware / Flash Flood Warnings in 1996

Flash Flood Warning 56, NWS Philadelphia/Mount Holly

July 13, 1996New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 13, 1996, 7:54 AM EDT for New Castle County, Delaware. It was in force for 4 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
Jul 13, 1996, 7:54 AM EDT (11:54 UTC)
Expired
Jul 13, 1996, 11:55 AM EDT
In force
4 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 11:57 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 00:00Z, 11.9 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 1996-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 77 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 1996-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.1939Sfc1 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
77 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
496 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
85 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 131154
FFWPHL
DEC003-131555-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
754 AM EDT SAT JUL 13 1996

THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY NJ HAS
ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1155 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN  DELAWARE

   ...NEW CASTLE COUNTY
 
HEAVY RAIN IN EXCESS OF 2 INCHES HAS SENT THE CHRISTINA RIVER AT
COOCHS BRIDGE OVER ITS BANKS. RAIN CONTINUE TO FALL OVER THE AREA AND
ADDITIONAL RISES CAN BE EXPECTED.

A FLASH FLOOD WATCH AND A TORNADO WATCH REMAIN IN EFFECT FOR THE
AREA.

IF YOU ARE IN THE PATH OF THIS STORM AND IN AN AREA PRONE TO
FLOODING...BE ALERT TO MOVE TO HIGHER GROUND. AFTER THE STORM HAS
PASSED...AND THE THREAT OF FLOODING IS OVER...REPORT ANY SEVERE
WEATHER OR FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY AND HAVE
THEM RELAY YOUR SEVERE WEATHER REPORT ON TO THE NATIONAL WEATHER
SERVICE.

VERY HEAVY RAINS FROM THUNDERSTORMS CAN CAUSE FLOODING OF POOR
DRAINAGE AREAS AND LOW LYING SPOTS IN A HURRY. BE ALERT FOR RAPIDLY
CHANGING CONDITIONS.

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.

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; radar from the NEXRAD Level II archive.