Alert archive / Connecticut / Flash Flood Warnings in 1998

Flash Flood Warning 9, NWS New York, NY

May 10, 1998Naugatuck Valley Planning Region, Connecticut

NWS New York, NY issued this flash flood warning at May 10, 1998, 7:20 PM EDT for Naugatuck Valley Planning Region, Connecticut. It was in force for 12 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
May 10, 1998, 7:20 PM EDT (23:20 UTC)
Expired
May 11, 1998, 7:15 AM EDT
In force
12 hr
Issued by
NWS New York, NY
Area
Whole counties

County Naugatuck Valley Planning Region, CT

The radar

The Brookhaven radar (KOKX), 75 km from the middle of the area, began a volume at 23:19 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

Brookhaven, NY (KOKX), launched 12:00Z, 11.3 hours before the alert went out and 75 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, Brookhaven, NY at 12:00Z on 1998-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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, Brookhaven, NY at 12:00Z on 1998-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 309 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
474 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
309 m²/s²
0-3 km storm-relative helicity
388 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 102321
FFWNYC
CTC009-111115-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
720 PM EDT SUN MAY 10 1998

THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NEW HAVEN COUNTY IN SOUTH CENTRAL CONNECTICUT

* UNTIL 715 AM EDT MONDAY MORNING

* AT 710 PM ...A RIVER GAGE INDICATES THAT THE QUINNIPIAC RIVER
NEAR QUINNIPIAC IN NEW HAVEN COUNTY HAS GONE ABOVE FLOOD LEVEL.
OTHER SMALL STREAMS IN NEW HAVEN COUNTY MAY ALSO RISE ABOVE BANKFULL
TONIGHT...SO TAKE NECESSARY PRECAUTIONS.

* DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

  EKH

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, May 10, 3:13 PM EDT, 4 hours 7 minutes before
NYZ067>081-NJZ002>006-011-CTZ005-012-110230-

SPECIAL WEATHER STATEMENT AND WEATHER MAP DISCUSSION FOR
EXTREME SOUTHEASTERN NEW YORK...NORTHEASTERN NEW JERSEY
AND SOUTHERN CONNECTICUT
NATIONAL WEATHER SERVICE NEW YORK NY
313 PM EDT SUN MAY 10 1998

...THE NATIONAL WEATHER SERVICE HAS ISSUED A FLOOD WATCH FOR THE
LOWER HUDSON VALLEY OF NEW YORK AND EXTENDED THE FLOOD WATCH FOR
NORTHEASTERN NEW JERSEY CONTINUES THROUGH MONDAY...

...A COASTAL FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY FOR THE
ENTIRE TRI-STATE REGION SHORELINE...

LOW PRESSURE OFF THE MID ATLANTIC COAST WILL CONTINUE A SLOW DRIFT
TO THE EAST THROUGH TUESDAY.  HIGH PRESSURE OVER SOUTHEAST CANADA
WILL MOVE EAST AND SOUTH INTO NORTHERN NEW ENGLAND MONDAY...AND THEN
BEGIN TO BUILD SOUTH TUESDAY.  THE PERSISTENT NORTHEAST FLOW OF
MOIST AIR BETWEEN THESE TWO WEATHER SYSTEMS CONTINUE PERIODS OF RAIN
AND GUSTY NORTHEAST WINDS INTO EARLY TUESDAY.

THIS LONG PERIOD OF ONSHORE WINDS WILL RESULT IN WIDESPREAD MINOR
COASTAL FLOODING DURING THE TIMES OF HIGH TIDE INTO MONDAY AND
TUESDAY.  LOCAL MODERATE COASTAL FLOODING IS ALSO POSSIBLE...
ESPECIALLY IN THOSE AREAS THAT ARE MOST VULNERABLE...SUCH AS
FREEPORT LONG ISLAND.

PROLONGED PERIODS OF HEAVY RAIN COULD CAUSE SOME STREAMS AND CREEKS
TO RISE TO NEAR BANKFULL.  THERE WILL BE FLOODING ON MANY STREETS
AND HIGHWAYS SO MOTORISTS SHOULD EXERCISE CAUTION.

THERE MAY BE SOME IMPROVEMENT ON THE HORIZON.  FAIR AND DRY WEATHER
IS EXPECTED TO BEGIN LATE TUESDAY AND CONTINUE INTO MIDWEEK.

REYNOLDS
Special weather statement, May 10, 3:13 PM EDT, 4 hours 7 minutes before
NYZ067>081-NJZ002>006-011-CTZ005-012-110230-

SPECIAL WEATHER STATEMENT AND WEATHER MAP DISCUSSION FOR
EXTREME SOUTHEASTERN NEW YORK...NORTHEASTERN NEW JERSEY
AND SOUTHERN CONNECTICUT
NATIONAL WEATHER SERVICE NEW YORK NY
313 PM EDT SUN MAY 10 1998

...THE NATIONAL WEATHER SERVICE HAS ISSUED A FLOOD WATCH FOR THE
LOWER HUDSON VALLEY OF NEW YORK AND EXTENDED THE FLOOD WATCH FOR
NORTHEASTERN NEW JERSEY CONTINUES THROUGH MONDAY...

...A COASTAL FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY FOR THE
ENTIRE TRI-STATE REGION SHORELINE...

LOW PRESSURE OFF THE MID ATLANTIC COAST WILL CONTINUE A SLOW DRIFT
TO THE EAST THROUGH TUESDAY.  HIGH PRESSURE OVER SOUTHEAST CANADA
WILL MOVE EAST AND SOUTH INTO NORTHERN NEW ENGLAND MONDAY...AND THEN
BEGIN TO BUILD SOUTH TUESDAY.  THE PERSISTENT NORTHEAST FLOW OF
MOIST AIR BETWEEN THESE TWO WEATHER SYSTEMS CONTINUE PERIODS OF RAIN
AND GUSTY NORTHEAST WINDS INTO EARLY TUESDAY.

THIS LONG PERIOD OF ONSHORE WINDS WILL RESULT IN WIDESPREAD MINOR
COASTAL FLOODING DURING THE TIMES OF HIGH TIDE INTO MONDAY AND
TUESDAY.  LOCAL MODERATE COASTAL FLOODING IS ALSO POSSIBLE...
ESPECIALLY IN THOSE AREAS THAT ARE MOST VULNERABLE...SUCH AS
FREEPORT LONG ISLAND.

PROLONGED PERIODS OF HEAVY RAIN COULD CAUSE SOME STREAMS AND CREEKS
TO RISE TO NEAR BANKFULL.  THERE WILL BE FLOODING ON MANY STREETS
AND HIGHWAYS SO MOTORISTS SHOULD EXERCISE CAUTION.

THERE MAY BE SOME IMPROVEMENT ON THE HORIZON.  FAIR AND DRY WEATHER
IS EXPECTED TO BEGIN LATE TUESDAY AND CONTINUE INTO MIDWEEK.

REYNOLDS

Nearby

Flash Flood Warnings in Connecticut, 1998Every flash flood warning in 1998

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.