Alert archive / New York / Flash Flood Warnings in 2016

Flash Flood Warning 3, NWS New York, NY

July 31, 2016Orange County, Putnam County, New York

NWS New York, NY issued this flash flood warning at Jul 31, 2016, 3:30 AM EDT for Orange County, Putnam County, New York. It was in force for 90 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 31, 2016, 3:30 AM EDT (07:30 UTC)
Expired
Jul 31, 2016, 5:00 AM EDT
In force
90 min
Issued by
NWS New York, NY
Area
Storm-based polygon
Flood severity
None

Counties Orange County, NY, Putnam County, NY

The radar

The Brookhaven radar (KOKX), 116 km from the middle of the area, began a volume at 07:34 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 00:00Z, 7.5 hours before the alert went out and 116 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 00:00Z on 2016-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 683 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2016-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 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
683 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
531 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

584 
WGUS51 KOKX 310730
FFWOKX
NYC071-079-310900-
/O.NEW.KOKX.FF.W.0003.160731T0730Z-160731T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
330 AM EDT SUN JUL 31 2016

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN PUTNAM COUNTY IN SOUTHEASTERN NEW YORK...
  SOUTHEASTERN ORANGE COUNTY IN SOUTHEASTERN NEW YORK...

* UNTIL 500 AM EDT

* AT 330 AM EDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE
  WARNED AREA. UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN. FLASH
  FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  NEWBURGH...MONROE...COLD SPRING...WEST POINT...NEW WINDSOR...
  HARRIMAN...KIRYAS JOEL...WASHINGTONVILLE...HIGHLAND FALLS...
  TUXEDO PARK...BALMVILLE...CORNWALL ON HUDSON...HIGHLAND MILLS...
  CENTRAL VALLEY...FIRTHCLIFFE...VAILS GATE AND FORT MONTGOMERY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4154 7399 4153 7400 4146 7400 4144 7398
      4149 7393 4149 7389 4132 7395 4132 7399
      4121 7415 4119 7427 4135 7425 4155 7404

$$
1 follow-up statement
319 
WGUS71 KOKX 310901
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
501 AM EDT SUN JUL 31 2016

NYC071-079-310910-
/O.EXP.KOKX.FF.W.0003.000000T0000Z-160731T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PUTNAM NY-ORANGE NY-
501 AM EDT SUN JUL 31 2016

...THE FLASH FLOOD WARNING FOR WESTERN PUTNAM AND SOUTHEASTERN ORANGE
COUNTIES HAS EXPIRED...

HEAVY RAIN HAS ENDED ACROSS THE AREA. ADDITIONAL FLOODING IS NO
LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ANY
REMAINING ROAD CLOSURES.

LAT...LON 4154 7399 4153 7400 4146 7400 4144 7398
      4149 7393 4149 7389 4132 7395 4132 7399
      4121 7415 4119 7427 4135 7425 4155 7404

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 1:25 AM EDTAreal Flood AdvisoryOKXOrange, Rockland2 hr
Jul 31, 4:44 AM EDTAreal Flood AdvisoryOKXPutnam2 hr
Jul 31, 4:56 AM EDTFlash Flood WatchOKXBronx, Kings, Nassau, New York, Orange, Putnam and 4 more10 hr
Jul 31, 5:15 PM EDTAreal Flood AdvisoryOKXOrange2 hr
Jul 31, 5:55 PM EDTAreal Flood AdvisoryOKXOrange2 hr
Jul 31, 6:16 PM EDTAreal Flood AdvisoryOKXPutnam119 min
Jul 31, 6:37 PM EDTAreal Flood AdvisoryOKXBronx113 min
Jul 31, 6:55 PM EDTAreal Flood AdvisoryOKXOrange2 hr

Nearby

Flash Flood Warnings in New York, 2016Every flash flood warning in 2016

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.