Alert archive / New York / Flash Flood Warnings in 1990

Flash Flood Warning 16, NWS New York, NY

October 24, 1990Westchester County, New York

NWS New York, NY issued this flash flood warning at Oct 24, 1990, 1:45 AM EDT for Westchester County, New York. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Oct 24, 1990, 1:45 AM EDT (05:45 UTC)
Expired
Oct 24, 1990, 5:00 AM EDT
In force
3 hr
Issued by
NWS New York, NY
Area
Whole counties

County Westchester County, NY

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

Albany, NY (KALB), launched 00:00Z, 5.8 hours before the alert went out and 171 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, Albany, NY at 00:00Z on 1990-10-24Temperature 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, Albany, NY at 00:00Z on 1990-10-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 252 square meters per square second.193958Sfc1 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
0 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
252 m²/s²
0-3 km storm-relative helicity
347 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 KNYC 240554 COR
FFWNYC
NYC119-240800-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
145 AM EDT WED OCT 24 1990...CORRECTION FOR UGC EXPIRATION TIME

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLOOD WARNING EFFECTIVE
UNTIL 4 AM EDT WEDNESDAY MORNING FOR PERSONS IN THE FOLLOWING
COUNTY

IN THE STATE OF NEW YORK

WESTCHESTER

HEAVY RAINS OF AROUND 2 INCHES HAVE PUSHED SMALL STREAMS AND RIVERS
OVER THEIR BANKFULL IN WESTCHESTER COUNTY.  WHILE THE RAIN HAS
TAPERED OFF AND ENDED IN MOST PARTS OF THE COUNTY...SECTIONS OF
THE SAW MILL AND HUTCHINSON RIVER PARKWAYS REMAIN CLOSED DUE TO
FLOODING FROM THEIR ADJACENT RIVERS.  ALSO THERE IS PROBABLY SOME
PONDING OF WATER IN OTHER POOR DRAINAGE AREAS ACROSS THE COUNTY.

A FLOOD WARNING MEANS FLOODING IS OCCURRING OR IMMINENT. IF YOU SEE
FLOOD WATERS APPROACHING YOU...PLEASE MOVE TO HIGHER GROUND QUICKLY.
DO NOT ATTEMPT TO WALK OR DRIVE THROUGH FLOODED AREAS...IT CAN )COST
YOU YOUR LIFE.

GIGI

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, Oct 23, 9:59 PM EDT, 3 hours 46 minutes before
CTZALL-240300-

SPECIAL WEATHER STATEMENT RERUN
NATIONAL WEATHER SERVICE BRIDGEP0RT CONNECTICUT
908 PM EDT TUE OCT 23 1990

...AN URBAN FLOOD ADVISORY IN EFFECT FOR CONNECTICUT OVERNIGHT.

MOSTLY LIGHT RAIN WAS FALLING IN THE BRIDGEPORT AND NEW HAVEN AREA
AS OF 9 PM.  HOWEVER IN THE PAST SIX HOURS IN THE FAIRFIELD...NEW HAVEN
AND MIDDLESEX COUNTIES RAINFALL AMOUNTS RANGED FROM .63 OF AN INCH IN
WALLINGFORD TO 1.74 INCHES AT STEVENSON.

SCATTERED AREAS OF HEAVIER RAIN ALONG WITH SOME THUNDERSTORMS WILL BE
PASSING THROUGH THE REGION OVERNIGHT AND THIS WILL CAUSE FLOODING OF
ROADS AND POOR DRAINAGE AREAS.  THE RAIN SHOULD END EARLY WEDNESDAY...
THEN BECOME PARTLY SUNNY IN THE AFTERNOON.

HAZZARD
Special weather statement, Oct 23, 10:40 PM EDT, 3 hours 5 minutes before
NJZ001-005-007-015-NYZ014>017-240300-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
FOR EXTREME SOUTHEAST NEW YORK...NORTHERN NEW JERSEY AND LONG
ISLAND
NATIONAL WEATHER SERVICE NEW YORK NY
1030 PM EDT TUE OCT 23 1990

A LARGE AREA OF MOSTLY LIGHT RAIN WAS OVER THE LOWER HUDSON VALLEY OF NEW
YORK STATE...WESTERN CONNECTICUT...THE WESTERN HALF OF LONG ISLAND...THE
METROPOLITAN AREA...MOST OF NORTHERN AND CENTRAL NEW JERSEY...AND OVER THE
OCEAN OUT TO 135 MILES SOUTHEAST OF NEW YORK CITY.

THERE WAS ALSO SOME LIGHT RAIN SCATTERED OVER SOUTHWESTERN MASSACHUSETTS...
EASTERN CONNECTICUT...SOUTHERN RHODE ISLAND...AND EASTERN PENNSYLVANIA.

EMBEDDED IN THIS BROAD AREA OF LIGHT RAIN WERE SCATTERED PATCHES OF HEAVIER
RAIN.  THERE WAS ALSO A THUNDERSTORM WITH HEAVY RAIN OVER THE OCEAN OFF
THE NORTHERN NEW JERSEY COAST.

MOVEMENT WAS TO THE NORTH FROM 25 TO 30 MILES AN HOUR.

EL
Special weather statement, Oct 23, 11:23 PM EDT, 2 hours 22 minutes before
CTZALL-240430-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BRIDGEP0RT CONNECTICUT
1122 PM EDT TUE OCT 23 1990

...AN URBAN FLOOD ADVISORY IN EFFECT FOR CONNECTICUT OVERNIGHT.

RAIN WAS STILL FALLING ACROSS MOST OF CONNECTICUT AS OF 1115 PM.
SOUTHWESTERN PART OF THE SATE HAS SEEN HEAVY RAINFALL ON AND OFF FROM
2 PM.  SOME REPORTS IN THIS AREA AS OF 10 PM HAD SAUGATUCK WITH 2.20
INCHES.  A CALL AT 1030 PM TO THE STAMFORD POLICE HAD THE RIPPOWAM
RIVER ABOUT 1 FOOT BELOW THE BANKS.  PERSONS IN THIS AREA AS WELL
AS THE REST OF FAIRFIELD AND NEW HAVEN COUNTIES SHOULD KEEP UP ON
ANY CHANGE IN CONDITIONS THAT MAY BE ISSUED BY THE NATIONAL WEATHER
SERVICE.

MOST OTHER AREAS REPORT ONLY ROADaWAY FLOODING.  THE NATIONAL WEATHER
SERVICE OFFICE AT BRIDGEPORT HAD 1.60 INCHES FROM 2 PM THIS AFTERNOON.

HAZZARD
Special weather statement, Oct 23, 11:40 PM EDT, 2 hours 5 minutes before
NJZ001-005-007-015-NYZ014>017-240300-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
FOR EXTREME SOUTHEAST NEW YORK...NORTHERN NEW JERSEY AND LONG
ISLAND
NATIONAL WEATHER SERVICE NEW YORK NY
1130 PM EDT TUE OCT 23 1990

A LARGE AREA OF MOSTLY LIGHT RAIN WAS OVER THE LOWER HUDSON VALLEY AND THE
CATSKILL MOUNTAINS OF NEW YORK STATE...SOUTHWESTERN MASSACHUSETTS...
WESTERN CONNECTICUT...MOST OF LONG ISLAND...THE METROPOLITAN AREA...AND
MUCH OF NORTHERN AND CENTRAL NEW JERSEY.

THIS AREA OF RAIN EXTENDED OUT OVER THE OCEAN SOUTH OF LONG ISLAND FOR ABOUT
150 MILES.

THERE WERE ALSO SOME SCATTERED AREAS OF RAIN OVER SOUTHEASTERN MASSACHUSETTS
AND EASTERN CONNECTICUT.

EMBEDDED IN THIS BROAD AREA OF RAIN WERE SCATTERED PATCHES OF HEAVIER RAIN
...AND THERE WAS A THUNDERSTORM WITH HEAVY RAIN OVER THE OCEAN 30 MILES
SOUTH OF THE WESTERN END OF LONG ISLAND.

MOVEMENT WAS TO THE NORTH AT 25 MILES AN HOUR.

EL
Special weather statement, Oct 24, 12:26 AM EDT, 1 hour 19 minutes before
NJZ001-005-007-015-NYZ014>017-240300-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
FOR EXTREME SOUTHEAST NEW YORK...NORTHERN NEW JERSEY AND LONG ISLAND
NATIONAL WEATHER SERVICE NEW YORK NY
1230 AM EDT WED OCT 24 1990

NEW YORK CITY RADAR IS NON OPERATIONAL AT THE PRESENT TIME.
OTHER WEATHER SERVICE RADAR AND SURFACE OBSERVATIONS SHOWEDTHE FOLLOWING:

A LARGE AREA OF MOSTLY LIGHT RAIN OVER THE LOWER HUDSON VALLEY AND THE
CATSKILL MOUNTAINS OF NEW YORK STATE...SOUTHWESTERN MASSACHUSETTS...
WESTERN CONNECTICUT...MOST OF LONG ISLAND...THE METROPOLITAN AREA...AND
MUCH OF NORTHERN AND CENTRAL NEW JERSEY.

THIS AREA OF RAIN EXTENDED OUT OVER THE OCEAN SOUTH OF LONG ISLAND FOR ABOUT
150 MILES.

THERE WERE ALSO SOME SCATTERED AREAS OF RAIN OVER SOUTHEASTERN MASSACHUSETTS
AND EASTERN CONNECTICUT.

MOVEMENT WAS TO THE NORTH AT 25 MILES AN HOUR.

MIESELL
/
Special weather statement, Oct 24, 1:44 AM EDT, 1 minute before
NJZ001-005-007-015-NYZ014>017-240300-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
FOR EXTREME SOUTHEAST NEW YORK...NORTHERN NEW JERSEY AND LONG ISLAND
NATIONAL WEATHER SERVICE NEW YORK NY
130 AM EDT WED OCT 24 1990

A LARGE AREA OF MOSTLY LIGHT RAIN WAS OVER THE HUDSON VALLEY
OF NEW YORK STATE...CONNECTICUT...SCATTERED OVER SOUTHERN MASSACHUSETTS
...RHODE ISLAND  AND OVER THE OCEAN 50 MILES SOUTHEAST OF MONTAUK POINT ON LONG
ISLAND.

MOVEMENT WAS  TO THE NORTH NORTHEAST AT 20 MPH.
MIESELL
/

Nearby

Flash Flood Warnings in New York, 1990Every flash flood warning in 1990

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.