Alert archive / Delaware / Flash Flood Warnings in 1993

Flash Flood Warning 2, NWS Wilmington, NC

March 4, 1993New Castle County, Delaware

NWS Wilmington, NC issued this flash flood warning at Mar 4, 1993, 3:07 PM EST for New Castle County, Delaware. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Mar 4, 1993, 3:07 PM EST (20:07 UTC)
Expired: Mar 4, 1993, 8:15 PM EST
In force: 5 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, 8.1 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 533 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 243 m²/s²
0-3 km storm-relative helicity: 395 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 042008
FFWILG
DEC003-050115-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON DE
307 PM EST THU MAR 4 1993
 
THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  815 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN NORTH DELAWARE
 
   ...NEW CASTLE COUNTY
 
HEAVY RAINS CONTINUE FALLING IN NORTHERN DELAWARE. RIVERS AND STREAMS
ARE RISING. THE CHRISTINA RIVER WAS REPORTED OUT OF BANKS WITH A READING
OF 10.4 FEET. THIS IS 1.4 FEET ABOVE FLOOD STAGE AND THE RIVER CONTINUES
TO RISE RAPIDLY.
 
 
A FLASH 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.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

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, Mar 4, 9:45 AM EST, 5 hours 22 minutes before

NCZ001-002-017-041545-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE CAPE HATTERAS NC
930 AM EST THU MAR 4 1993

...HEAVY RAINS ALONG COASTAL NORTHEAST NORTH CAROLINA...

AT 930 AM...WEATHER SEARCH RADAR WAS SHOWING AN AREA OF MODERATE TO
HEAVY RAINS OVER COASTAL NORTH CAROLINA...MAINLY OVER TYRRELL...DARE
AND CURRITUCK COUNTIES. THIS RAIN MAY CAUSE SOME TEMPORARY PONDING OF
WATER ON SOME ROADWAYS THROUGHOUT THESE AREAS. PEOPLE TRAVELLING WITHIN
THESE COUNTIES SHOULD ALLOW EXTRA TIME FOR THEIR COMMUTES.

ELSEWHERE...RAIN WITH ISOLATED THUNDERSTORMS COVERED THE ATLANTIC
WATERS...RANGING UP TO 125 MILES EAST OF THE COASTLINE BETWEEN CAPE
CHARLES VIRGINIA AND CAPE LOOKOUT NORTH CAROLINA.

MOVEMENT OF ALL PRECIPITATION WAS NORTH AT 50 MILES AN HOUR.
DCH

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 4, 4:07 PM EST	Flash Flood Warning	ILM	New Castle	4 hr
Mar 4, 5:44 PM EST	Flash Flood Warning	ILM	New Castle	4 hr

Nearby

Flash Flood Warnings in Delaware, 1993 Every flash flood warning in 1993

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.