Alert archive / Delaware / Flash Flood Warnings in 1988

Flash Flood Warning 2, NWS Wilmington, NC

November 28, 1988New Castle County, Delaware

NWS Wilmington, NC issued this flash flood warning at Nov 28, 1988, 4:12 AM EST for New Castle County, Delaware. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Nov 28, 1988, 4:12 AM EST (09:12 UTC)
Expired
Nov 28, 1988, 9:15 AM EST
In force
5 hr
Issued by
NWS Wilmington, NC
Area
Whole counties

County New Castle County, DE

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 00:00Z, 9.2 hours before the alert went out and 99 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, Atlantic City In, NJ at 00:00Z on 1988-11-28Temperature 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, Atlantic City In, NJ at 00:00Z on 1988-11-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 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
1018 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
192 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 KILG 280917
FFWILG
DEC003-281415-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON DE
412 AM EST MON NOV 28 1988
 
THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  915 AM EST
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTHERN DELAWARE
          ...NORTHERN NEW CASTLE
 
HEAVY RAINFALL OF ONE AND A HALF TO TWO INCHES OCCURRED ACROSS MOST OF
NORTHERN DELAWARE OVERNIGHT. THE WATER LEVEL OF MANY SMALL STREAMS
THROUGHOUT NORTHERN NEW CASTLE COUNTY HAS RISEN TO NEAR BANKFUL.
 
IN PARTICULAR...THE CHRISTINA RIVER AT COOCHS BRIDGE HAS ALREADY
CLIMBED TO ITS BANKFUL STAGE OF 9 FEET...AND CONTINUES TO RISE.
 
ADDITION SHOWERS...SOME OF WHICH MAY BE QUITE HEAVY...ARE EXPECTED
OVER THE REGION DURING THE MORNING HOURS AND MORE WIDESPREAD SMALL
STREAM AND URBAN FLOODING IS LIKELY.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT.
 
IF YOU LIVE IN A FLOOD PRONE AREA...TAKE NECESSARY PRECAUTION
IMMEDIATELY.
 
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDzONED QUICKLY.  MOVE TO HIGHER GROUND.
 
LC

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Nov 28, 3:21 AM EST, 51 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE WILMINGTON NC
320 AM EST MON NOV 28 1988

AT 315 AM A LINE OF THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDS SOUTH
FROM NEAR NEW BERN...ACROSS JACKSONVILLE TO JUST SOUTH OF WILMINGTON
NORTH CAROLINA.  THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY DOWNPOURS
AND STRONG GUSTY WINDS.  THE THUNDERSTORMS ARE MOVING NORTHEAST AT
35 MILES AN HOUR.

MOTORISTS SHOULD BE PREPARED FOR STANDING W>ATER IN LOW LYING AREAS
AND VISIBILITY SHARPLY REDUCED IN THE HEAVIER DOWNPOURS.  THERE HAS
BEEN NO REPORTS OF SEVERE WEATHER WITH THESE THUNDERSTORMS.

THIS WILL BE THE LAST STATEMENT ON THESE STORMS UNLESS CONDITIONS
DETERIORATE.

TGO
Special weather statement, Nov 28, 4:04 AM EST, 8 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE CAPE HATTERAS NC
4 AM EST MON NOV 28 1988

  ...TORNADO WATCH FOR MUCH OF NORTHEAST NORTH CAROLINA...

   ...GALE WARNINGS FOR COASTAL WATERS AND SOUNDS...

AT 345 AM...A TORNADO WATCH IS IN EFFECT UNTIL 6AM FOR MOST OF
NORTHEAST NORTH CAROLINA EXCEPT DARE COUNTY.

AT 330 AM RADAR INDICATED THUNDERSTORMS AND RAINSHOWERS MOVING
ACROSS NORTHEAST NORTH CAROLINA.  THE THUNDERSTORMS EXTENDED FROM
SOUTH OF WILMINGTON ACROSS EASTERN NORTH CAROLINA INTO SOUTHEAST
VIRGINIA.   THESE THUNDERSTORMS MAY PRODUCE VERY HEAVY RAIN...
HEAVY LIGHTNING AND STRONG GUSTY WINDS.

THE THUNDERSTORMS AND SHOWERS WERE MOVING TO THE NORTHEAST AT
n35 MILES AN HOUR.
LEIN

Nearby

Flash Flood Warnings in Delaware, 1988Every flash flood warning in 1988

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.