Alert archive / New York / Areal Flood Advisories in 2021

Areal Flood Advisory 82, NWS New York, NY

July 29, 2021Westchester County, New York; Greater Bridgeport Planning Region, Connecticut

NWS New York, NY issued this areal flood advisory at Jul 29, 2021, 3:46 PM EDT for Westchester County, New York; Greater Bridgeport Planning Region, Connecticut. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Jul 29, 2021, 3:46 PM EDT (19:46 UTC)
Expired
Jul 29, 2021, 4:45 PM EDT
In force
59 min
Issued by
NWS New York, NY
Area
Storm-based polygon

Counties Greater Bridgeport Planning Region, CT, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 64 km from the middle of the area, began a volume at 19:49 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, 7.8 hours before the alert went out and 64 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 2021-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 54 joules per kilogram.LCLLFCEL10008507005003002001001 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 2021-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
54 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
823 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

What forecasters said that day

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

NWS New York, NY wrote its last area forecast discussion before this areal flood advisory went out at Jul 29, 1:36 PM EDT, 2 hours 10 minutes earlier.

Area forecast discussion, Jul 29, 1:36 PM EDT, 2 hours 10 minutes before
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Hazardous weather outlook, Jul 29, 3:23 PM EDT, 23 minutes before
Hazardous Weather Outlook
National Weather Service New York NY
323 PM EDT Thu Jul 29 2021

ANZ335-338-345-353-355-NJZ002-004-006-103>108-NYZ071>075-078-080-
176>179-301930-
Long Island Sound West of New Haven CT/Port Jefferson NY-
New York Harbor-
South Shore Bays from Jones Inlet through Shinnecock Bay-
Fire Island Inlet NY to Moriches Inlet NY out 20 nm-
Sandy Hook NJ to Fire Island Inlet NY out 20 nm-Western Passaic-
Eastern Passaic-Hudson-Western Bergen-Eastern Bergen-Western Essex-
Eastern Essex-Western Union-Eastern Union-Southern Westchester-
New York (Manhattan)-Bronx-Richmond (Staten Island)-Kings (Brooklyn)-
Northwest Suffolk-Southwest Suffolk-Northern Queens-Northern Nassau-
Southern Queens-Southern Nassau-
323 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Atlantic coastal waters,
northeast New Jersey and southeast New York.

.DAY ONE...This afternoon and tonight.

Showers and thunderstorms into this evening may produce damaging
winds and heavy rainfall. An isolated tornado is not out of the
question.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

&&

This Hazardous Weather Outlook provides a summary of potential
widespread hazardous weather events that may reach NWS warning
criteria. Most long fused NWS watches, warnings, and advisories in
effect are highlighted.

Please refer to the latest NWS forecasts for weather not meeting NWS
warning criteria.

ANZ331-332-340-350-CTZ005>012-NYZ067>070-079-081-301930-
Long Island Sound East of New Haven CT/Port Jefferson NY to the
Mouth of the Connecticut River-
Long Island Sound East of the Mouth of the Connecticut River-
Peconic and Gardiners Bays-
Moriches Inlet NY to Montauk Point NY out 20 nm-Northern Fairfield-
Northern New Haven-Northern Middlesex-Northern New London-
Southern Fairfield-Southern New Haven-Southern Middlesex-
Southern New London-Orange-Putnam-Rockland-Northern Westchester-
Northeast Suffolk-Southeast Suffolk-
323 PM EDT Thu Jul 29 2021

This Hazardous Weather Outlook is for Atlantic coastal waters,
southern Connecticut and southeast New York.

.DAY ONE...This afternoon and tonight.

There is a low probability for any thunderstorms this evening to
produce gusty winds and heavy rainfall.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Hazardous weather is not expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

&&

This Hazardous Weather Outlook provides a summary of potential
widespread hazardous weather events that may reach NWS warning
criteria. Most long fused NWS watches, warnings, and advisories in
effect are highlighted.

Please refer to the latest NWS forecasts for weather not meeting NWS
warning criteria.

The office that day

Everything else NWS New York, NY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 29, 4:33 AM EDTSmall Craft AdvisoryOKX16 hr
Jul 29, 3:20 PM EDTSmall Craft AdvisoryOKX35 hr
Jul 29, 5:02 PM EDTSpecial Weather StatementOKXRockland, Westchester43 min
Jul 29, 5:35 PM EDTAreal Flood AdvisoryOKXRockland, Westchester85 min
Jul 29, 7:33 PM EDTSpecial Marine WarningOKX57 min
Jul 29, 4:59 PM EDTSpecial Weather StatementOKXEssex46 min
Jul 29, 5:36 PM EDTTornado WarningOKXEssex24 min
Jul 29, 5:44 PM EDTAreal Flood AdvisoryOKXEssex63 min
Jul 29, 5:59 PM EDTTornado WarningOKXEssex9 min
Jul 29, 6:47 PM EDTFlash Flood WarningOKXEssex3 hr
Jul 29, 7:15 PM EDTAreal Flood AdvisoryOKXBergen, Hudson, Passaic2 hr
Jul 29, 4:04 PM EDTSpecial Weather StatementOKX41 min
Jul 29, 5:10 PM EDTAreal Flood AdvisoryOKXGreater Bridgeport Planning Region15 min
Jul 29, 5:25 PM EDTFlash Flood WarningOKXGreater Bridgeport Planning Region2 hr
Jul 29, 6:52 PM EDTAreal Flood AdvisoryOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region113 min

Nearby

Areal Flood Advisories in New York, 2021Areal Flood Advisories in Connecticut, 2021Every areal flood advisory in 2021

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.