Alert archive / New York / Flash Flood Warnings in 2012

Flash Flood Warning 10, NWS New York, NY

July 28, 2012Orange County, New York

NWS New York, NY issued this flash flood warning at Jul 28, 2012, 12:47 PM EDT for Orange County, New York. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 28, 2012, 12:47 PM EDT (16:47 UTC)
Expired
Jul 28, 2012, 3:45 PM EDT
In force
3 hr
Issued by
NWS New York, NY
Area
Storm-based polygon
Flood severity
None

County Orange County, NY

The radar

The Albany radar (KENX), 121 km from the middle of the area, began a volume at 16:51 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.

What was reported inside it

TimeReportWhereRemark
Jul 28, 2:02 PM EDTFLASH FLOOD1 Wsw Glenwood Park, NYWATER RUSHING DOWN UNION AVE DUE TO STREAM OVER ITS BANKS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 4.8 hours before the alert went out and 136 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 12:00Z on 2012-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 285 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, Albany, NY at 12:00Z on 2012-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
285 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
590 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

146 
WGUS51 KOKX 281647
FFWOKX
NYC071-281945-
/O.NEW.KOKX.FF.W.0010.120728T1647Z-120728T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
1247 PM EDT SAT JUL 28 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ORANGE COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 345 PM EDT...

* AT 1242 PM EDT...FLASH FLOODING IS EXPECTED AS ANOTHER AREA OF 
THUNDERSTORMS MOVES ACROSS ORANGE COUNTY. THIS ACTIVITY IS MOVING 
EAST AT 20 MPH. EXPECT RAINFALL RATES OF ONE TO TWO INCHES PER HOUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4151 7448 4159 7439 4164 7426 4161 7424
      4159 7414 4161 7414 4161 7407 4159 7405
      4159 7398 4146 7399 4138 7398 4126 7451
      4136 7470 4144 7476 4149 7476

$$

PW
2 follow-up statements
510 
WGUS71 KOKX 281800
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
200 PM EDT SAT JUL 28 2012

NYC071-281945-
/O.CON.KOKX.FF.W.0010.000000T0000Z-120728T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ORANGE NY-
200 PM EDT SAT JUL 28 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM EDT FOR
ORANGE COUNTY...

AT 156 PM EDT...SHOWERS AND THUNDERSTORMS CONTINUED TO MOVE ACROSS 
THE WARNED AREA...PRODUCING HEAVY RAIN. THIS IS IN ADDITION TO THE 
HEAVY DOWNPOURS EARLIER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY
AND SOUTHEAST NEW YORK.

&&

LAT...LON 4151 7448 4159 7439 4164 7426 4161 7424
      4159 7414 4161 7414 4161 7407 4159 7405
      4159 7398 4146 7399 4138 7398 4126 7451
      4136 7470 4144 7476 4149 7476

$$

PW
893 
WGUS71 KOKX 281944
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
344 PM EDT SAT JUL 28 2012

NYC071-281954-
/O.EXP.KOKX.FF.W.0010.000000T0000Z-120728T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ORANGE NY-
344 PM EDT SAT JUL 28 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 345 PM EDT FOR NORTHERN 
ORANGE COUNTY...

ADDITIONAL SHOWERS ARE EXPECTED...HOWEVER...THE HEAVY RAIN HAS MOVED 
TO THE SOUTHEAST OF THE WARNED AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY
AND SOUTHEAST NEW YORK.

LAT...LON 4151 7448 4159 7439 4164 7426 4161 7424
      4159 7414 4161 7414 4161 7407 4159 7405
      4159 7398 4146 7399 4138 7398 4126 7451
      4136 7470 4144 7476 4149 7476

$$

PW

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 8:41 AM EDTAreal Flood AdvisoryOKXNassau2 hr
Jul 28, 8:43 AM EDTAreal Flood AdvisoryOKXSuffolk2 hr
Jul 28, 8:49 AM EDTAreal Flood AdvisoryOKXSuffolk116 min
Jul 28, 12:16 PM EDTAreal Flood AdvisoryOKXOrange, Putnam59 min
Jul 28, 1:03 PM EDTSpecial Weather StatementOKXOrange42 min
Jul 28, 1:08 PM EDTSevere Thunderstorm WarningOKXOrange37 min
Jul 28, 1:25 PM EDTAreal Flood AdvisoryOKXPutnam95 min
Jul 28, 1:48 PM EDTSpecial Weather StatementOKXPutnam57 min
Jul 28, 1:54 PM EDTSpecial Weather StatementOKXOrange, Rockland66 min
Jul 28, 1:58 PM EDTAreal Flood AdvisoryOKXOrange, Putnam, Rockland, Westchester92 min
Jul 28, 2:20 PM EDTAreal Flood AdvisoryOKXWestchester85 min
Jul 28, 2:40 PM EDTFlash Flood WarningOKXOrange, Putnam, Rockland, Westchester3 hr
Jul 28, 2:44 PM EDTFlash Flood WarningOKXPutnam, Westchester3 hr
Jul 28, 2:58 PM EDTSpecial Marine WarningOKX47 min
Jul 28, 3:17 PM EDTAreal Flood AdvisoryOKXWestchester58 min
Jul 28, 4:00 PM EDTFlash Flood WarningOKXBronx, Kings, Nassau, New York, Queens, Westchester112 min
Jul 28, 5:04 PM EDTAreal Flood AdvisoryOKXNassau, Suffolk116 min
Jul 28, 6:43 PM EDTSpecial Weather StatementOKXOrange62 min

Nearby

Flash Flood Warnings in New York, 2012Every flash flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.