Alert archive / Delaware / Flash Flood Warnings in 1992

Flash Flood Warning 6, NWS Wilmington, NC

December 11, 1992New Castle County, Delaware

NWS Wilmington, NC issued this flash flood warning at Dec 11, 1992, 8:42 AM EST for New Castle County, Delaware. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Dec 11, 1992, 8:42 AM EST (13:42 UTC)
Expired
Dec 11, 1992, 12:45 PM EST
In force
4 hr
Issued by
NWS Wilmington, NC
Area
Whole counties

County New Castle County, DE

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 12:00Z, 1.7 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 12:00Z on 1992-12-11Temperature 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 12:00Z on 1992-12-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
659 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
57 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 111401
FFWILG
DEC003-111745-

BULLETIN - EBS ACTIVATION REQUESTED
FLOOD WARNING CORRECTION
NATIONAL WEATHER SERVICE WILMINGTON DE
842 AM EST FRI DEC 11 1992

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS EXTENDED THE
FLOOD WARNING EFFECTIVE UNTIL 1245 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATION......

IN NORTH DELAWARE

   ...NEW CASTLE COUNTY

THE CHRISTINA RIVER CONTINUES TO RISE AND AT 8AM INDICATED A READING OF
11.4 FEET...ALMOST 2 1/5 FEET ABOVE FLOOD STAGE. FLOODING IS OCCURRING
ON THE UPPER REACHES OF THE CHRISTINA GENERALLY UPSTREAM FROM
CHURCHMAN'S MARSH. WATER WAS CROSSING SMALLEYS DAM ROAD CAUSING
FLOODING...AND SOME ROADWAY FLOODING HAS BEEN REPORTED IN THE USUAL
POOR DRAINAGE AREAS WHEN HEAVY RAINS FALL IN THE AREA. THE CHRISTINA
SHOULD CREST WITHIN THE NEXT HOUR OR SO AND THEN BEGIN TO FALL. SINCE
YESTERDAY...OVER 2 INCHES OF RAIN HAS FALLEN IN PARTS OF NEW CASTLE
COUNTY...BUT ONLY LIGHT RAIN IS EXPECTED FOR THE REMAINDER OF TODAY.

THE WHITE CLAY CREEK IN STANTON IS ALSO FLOODING. FLOODING BEGINS AT 13
FEET AND THE WHITE CLAY WAS JUST STARTING TO SPILL OUT OF BANKS IN THE
DELAWARE PARK AREA. SOME OUT OF BANKS FLOODING WILL ALSO OCCUR
DOWNSTREAM AS FAR AS WHERE THE WHITE CLAY MERGES WITH THE CHRISTINA NEAR
NEWPORT.

A FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEV|ER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.



CS

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, Dec 11, 6:09 AM EST, 2 hours 33 minutes before
NCZ001-002-017-111400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CAPE HATTERAS NC
600 AM EST FRI DEC 11 1992

...GALE WARNING IS IN EFFECT FOR MUCH OF EASTERN NORTH CAROLINA
   INCLUDING THE COASTAL WATERS AND SOUNDS...

YESTERDAYS ONSHORE WINDS HAVE SPREAD SAND ACROSS ROADWAYS ALONG THE
OUTER BANKS...AS A RESULT CREATING HAZARDOUS TRAVELLING CONDITIONS FOR
THIS MORNINGS COMMUTE.  PORTIONS OF HIGHWAY 12 BETWEEN OREGON INLET
AND RODANTHE AND ON THE NORTH END OF OCRACOKE ISLAND WERE REPORTED
COMPLETELY SAND COVERED IN SOME LOCATIONS.

ALTHOUGH NO ONSHORE WINDS ARE ANTICIPATED TODAY...STRONG WEST WINDS
WILL PUSH SOUND WATERS UP ON THE EAST BANKS OF THE PAMLICO AND
ALBEMARLE SOUNDS...WITH PLACES LIKE THE COLLINGTON AREA MOST LIKELY
TO EXPERIENCE SHALLOW FLOODING.

THESE STRONG WINDS ARE BEING CAUSED BY THE CIRCULATION AROUND A SLOW

MOVING INTENSE LOW PRESSURE SYSTEM CURRENTLY OVER NORTHERN VIRGINIA.
THIS LOW WILL DRIFT NORTHEASTWARD AND BE IN A POSITION OFF THE
DELAWARE COAST BY NIGHTFALL.  AS A RESULT THE STRONGEST WINDS WILL
OCCUR TODAY AND BEGIN TO SLOWLY SUBSIDE LATE TODAY THROUGH SATURDAY
AS THE LOW TRACKS FURTHER AWAY FROM NORTH CAROLINA.

STAY TUNED TO NOAA WEATHER RADIO OR LOCAL TELEVISION AND RADIO STATIONS
FOR POSSIBLE ADDITIONAL STATEMENTS.

DCH

The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 11, 4:40 AM ESTFlash Flood WarningILMNew Castle4 hr
Dec 11, 12:45 PM ESTFlash Flood WarningILMNew Castle4 hr

Nearby

Flash Flood Warnings in Delaware, 1992Every flash flood warning in 1992

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.