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National Weather Service Forecast Office - Upton, NY

SUMMARY: An official, New York State 24 hour precipitation record was set at Islip, NY on August 12-13, 2014 with 13.57" of rain (See Public Information Statement). This breaks the previous record of 11.6" at Tannersville, NY on August 27-28, 2011 during Hurricane/Tropical storm Irene. 1.08" fell in just 9 minutes from 5:39 am to 5:47 am (See Islip, NY Rainfall Data)!  An anomalously deep upper level trough was moving into the northeast the morning of August 13th, transporting deep moisture over Long Island. At the surface, a parent low pressure system was moving across southeast Canada, with secondary low development just south of New York City. Heavy precipitation focused along and just north of the warm front associated with the secondary low pressure system. The mean storm motion was parallel to the orientation of the warm front and was significant in helping maintain heavy rain over Islip, NY for several hours. Click the links below to view different aspects of this historical event.

Radar and Satellite Review Dual Polarization Data Moisture  Islip, NY Rainfall Data
Photos Rainfall Reports Local Storm Reports NWS Products

 

Radar and Satellite Review

KOKX Base Reflectivity Loop 2-9 AM (Images Every 15 Minutes)

 

IR Satellite and Weather Prediction Center (WPC) Surface Analysis Water Vapor and Rapid Update Cycle(RAP) 500 mb Analysis

 

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Dual Polarization Data

 

KOKX Storm Total Accumulation Full Domain KOKX Storm Total Accumulation Zoom
Instantaneous Precip Rate (5:30 am) Specific Differential Phase (5:30 am)
(Higher the value, the more liquid water)

 

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Moisture

Deep, tropical moisture was available throughout the atmosphere as the event unfolded. The 00 UTC sounding from Wallops Island, VA (KWAL) observed a precipitable water of 2.38". This high moisture content air would be transported north towards Long Island from the negatively tilted trough. The 12 UTC sounding from Upton, NY (KOKX) contained a precipitable water of 1.81". However, this may be slightly underdone due to failure of the RH sensor around 600 mb. The animation below illustrates the large area of high precipitable water along the Middle Atlantic coast that was being advected northward by the low level wind field. Deep saturation was also present in both of these soundings below the freezing level. The warm cloud layer (between cloud base and freezing level) was 13,809 ft in depth in large part due to a freezing level of 15,162 ft.

0000 UTC August 13, 2014 KWAL Sounding 1200 UTC August 13, 2014 KOKX Sounding

 

RAP 850 mb Height (m), Wind (kt), and Layer Precipitable Water (in)

 

Precipitable water climatology data from Wallops Island, VA, courtesy of the Rapid City, SD NWS forecast office, illustrated the anomolous nature of the air mass that was transported towards Long Island. The 2.38" at Wallops Island was in the 99th percentile since 1963. This means 99% of the observed precipitable water values at Wallops Island have been below 2.38."  The observed 1.81" precipitable water at Upton, NY was in the 75th percentile, and a little below 2 standard deviations above normal.  However, this may be slighly low due to the failure of the RH sensor around 600 mb.

 

Wallops Island Precipitable Water Climo
Star represents 0000 UTC Aug 13, 2014 observed value
Upton Precipitable Water Climo
Star represents 1200 UTC Aug 13, 2014 observed value

 

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Islip, NY Rainfall Data

1-Minute Islip Automated Surface Observation System (ASOS) Data

Daryl Herzmann from Iowa State University shared this graph of 1-minute rainfall observations from Islip, NY from the morning of Wednesday, August 13. 1.08" of rain was recorded in just 9 minutes from 5:39 am to 5:47 am! A total of 1.76" was recorded in just 16 minutes from 5:39 am to 5:54 am! The data here is plotted from 12 am EDT to 11 am EDT. The total rainfall shown in the chart is 13.25." Please note that 24-hour climate data the NWS uses follows standard time (this plot is in Daylight Time) so this number will be slightly different than our records, which show 13.21" from 12 am Local Standard Time (LST) to 11 am LST.

 

Exceedence Probability Analysis

The Hydrometeorological Design Studies Center (HDSC) analyzed annual exceedance probabilities (AEPs) at Islip, NY.  An AEP gives the probability of exceeding a given amount of rainfall at least once in any given year at a given location. The map below illustrates rainfall magnitudes with AEPs ranging from 1/10 (10%) to smaller than 1/1000 (0.1%) for the 3-hour duration of heaviest rainfall.  Note the the corridor with AEPs smaller than 1/1000 where the heaviest rain indicates the true rarity of this historic event. For more information, please view the document, Exceedance Probability Analysis for the Islip, NY Rainfall Event, 13 August 2014, by the HDSC.

 

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Photos

Babylon, NY
Source: Bob Smith/Twitter
Babylon, NY
Source: NYS DOT/ CBS2
Babylon, NY
Source: MTA
Babylon, NY
Source: Mona Rivera/1010 WINS
Bay Shore, NY
Source: Anik Solaris/Twitter
Bay Shore, NY
Source: Justin Alba/News12 LI
Bay Shore, NY
Source: CBS2
Bay Shore, NY
Source: News 12 LI
Bay Shore, NY
Source: Sal Federico/Twitter
Bay Shore, NY
Source: Natasha Chiatar/News12 LI
Farmingdale, NY
Source: Rich Hoffman/ News12 LI
Holbrook, NY
Source: Delia Frank/News12 LI
Holbrook, NY
Source: Jay Henne/ News 12 LI
Holbrook, NY
Source: WeatherGoneWild
Holtsville, NY
Source: Jessica McAvoy
Islandia, NY
Source: Long Island Patch
Islip, NY
Source: Daniel Linek
Islip, NY
Source: Dyanna Aracena
Islip, NY
Source: WeatherGoneWild
Islip, NY
Source: MTA
Islip-McArthur Airport
Source: Gary Welch
Islip-McArthur Airport
Source: LI Patch
Jericho, NY
Source: CBS2
Nesconset, NY
Source: LI Patch
Ronkonkoma, NY
Source: LI Patch
Ronkonkoma, NY
Source: LI Patch
Selden, NY
Source: Mike Weinberg/CBS2
S. State Parkway
Source: Ryan Davidson
West Islip, NY
Source: Mona Rivera/1010 WINS
West Islip, NY
Source: NBC 4

 

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Rainfall Reports

 

PUBLIC INFORMATION STATEMENT
SPOTTER REPORTS
NATIONAL WEATHER SERVICE NEW YORK NY
129 PM EDT WED AUG 13 2014

THE FOLLOWING ARE UNOFFICIAL OBSERVATIONS TAKEN DURING THE PAST 24
HOURS FOR THE STORM THAT HAS BEEN AFFECTING OUR REGION. APPRECIATION
IS EXTENDED TO HIGHWAY DEPARTMENTS...COOPERATIVE OBSERVERS...SKYWARN
SPOTTERS AND MEDIA FOR THESE REPORTS. THIS SUMMARY IS ALSO AVAILABLE
ON OUR HOME PAGE AT WEATHER.GOV/NYC

********************STORM TOTAL RAINFALL********************

LOCATION          STORM TOTAL     TIME/DATE   COMMENTS
                     RAINFALL           OF
                     /INCHES/   MEASUREMENT

CONNECTICUT

...FAIRFIELD COUNTY...
   FAIRFIELD             1.63  1035 AM  8/13  TRAINED SPOTTER
   BRIDGEPORT AIRPORT    1.59  1023 AM  8/13  ASOS
   DANBURY               1.52  1200 PM  8/13  TRAINED SPOTTER
   DANBURY AIRPORT       1.02  1024 AM  8/13  ASOS
   BETHEL                0.70  1114 AM  8/13  TRAINED SPOTTER

...NEW HAVEN COUNTY...
   MADISON               4.50   909 AM  8/13  PUBLIC
   NEW HAVEN             2.70  1025 AM  8/13  ASOS
   HAMDEN                1.62   940 AM  8/13  TRAINED SPOTTER
   MERIDEN               0.96  1029 AM  8/13  ASOS

...NEW LONDON COUNTY...
   MONTVILLE             4.45   903 AM  8/13  AMATEUR RADIO
   LYME STATION          3.90   903 AM  8/13  EAST LYME
   OLD LYME              3.62  1200 PM  8/13  PUBLIC
   GROTON AIRPORT        2.40  1025 AM  8/13  ASOS
   COLCHESTER            2.12   809 AM  8/13  AMATEUR RADIO

NEW JERSEY

...BERGEN COUNTY...
   RIDGEWOOD             0.98   930 AM  8/13  TRAINED SPOTTER
   TETERBORO             0.56   706 AM  8/13  ASOS
   WESTWOOD              0.54   645 AM  8/13  TRAINED SPOTTER
   OAKLAND               0.20   914 AM  8/13  TRAINED SPOTTER

...ESSEX COUNTY...
   MAPLEWOOD             0.74  1000 AM  8/13  PUBLIC
   NEWARK AIRPORT        0.58   800 AM  8/13  ASOS
   CALDWELL AIRPORT      0.41   800 AM  8/13  ASOS

...HUDSON COUNTY...
   NORTH BERGEN          0.88  1000 AM  8/13  TRAINED SPOTTER

NEW YORK

...KINGS COUNTY...
   MIDWOOD               1.34   706 AM  8/13  TRAINED SPOTTER

...NASSAU COUNTY...
   MASSAPEQUA            8.20   930 AM  8/13  PUBLIC
   WANTAGH               7.84   825 AM  8/13  TRAINED SPOTTER
   MERRICK               6.81   749 AM  8/13  TRAINED SPOTTER
   LIDO BEACH            5.30   900 AM  8/13  TRAINED SPOTTER
   OLD BETHPAGE          5.27  1045 AM  8/13  TRAINED SPOTTER
   BELLMORE              5.20   830 AM  8/13  PUBLIC
   GARDEN CITY           4.75   800 AM  8/13  TRAINED SPOTTER
   PLAINVIEW             4.70   840 AM  8/13  TRAINED SPOTTER
   LONG BEACH            4.64   729 AM  8/13  PUBLIC
   SYOSSET               4.01   658 AM  8/13  TRAINED SPOTTER
   MUTTONTOWN            3.41   945 AM  8/13  TRAINED SPOTTER
   EAST HILLS            3.16  1100 AM  8/13  PUBLIC
   FLORAL PARK           2.80   745 AM  8/13  TRAINED SPOTTER
   BAYVILLE              2.63   730 AM  8/13  TRAINED SPOTTER
   MALVERNE              0.98   700 AM  8/13  TRAINED SPOTTER

...NEW YORK COUNTY...
   CENTRAL PARK          0.72  1032 AM  8/13  ASOS

...ORANGE COUNTY...
   MONTGOMERY AIRPORT    0.65   800 AM  8/13  ASOS

...PUTNAM COUNTY...
   COLD SPRING           1.30  1100 AM  8/13  TRAINED SPOTTER

...QUEENS COUNTY...
   NYC/JFK AIRPORT       3.26   940 AM  8/13  ASOS
   NYC/LA GUARDIA        0.77   800 AM  8/13  ASOS

...SUFFOLK COUNTY...
   ISLIP AIRPORT        13.27  1030 AM  8/13  ASOS
   HOLBROOK             12.57   119 PM  8/13  NWS EMPLOYEE
   WEST ISLIP           11.50   958 AM  8/13  TRAINED SPOTTER
   BAY SHORE            11.35   915 AM  8/13  TRAINED SPOTTER
   ISLIP                10.20   850 AM  8/13  TRAINED SPOTTER
   DEER PARK             8.40  1240 PM  8/13  PUBLIC
   RONKONKOMA            8.20   640 AM  8/13  TRAINED SPOTTER
   FARMINGVILLE          7.73   800 AM  8/13  TRAINED SPOTTER
   CENTEREACH            6.71   918 AM  8/13  NWS EMPLOYEE
   ST. JAMES             6.11   935 AM  8/13  PUBLIC
   SMITHTOWN             5.17   900 AM  8/13  TRAINED SPOTTER
   PORT JEFFERSON STATI  5.10   900 AM  8/13  PUBLIC
   EAST FARMINGDALE      4.93   800 AM  8/13  ASOS
   MEDFORD               4.45   800 AM  8/13  TRAINED SPOTTER
   MOUNT SINAI           4.40  1007 AM  8/13  CO-OP OBSERVER
   EAST NORTHPORT        4.40  1153 AM  8/13  TRAINED SPOTTER
   CENTERPORT            3.18   700 AM  8/13  CO-OP OBSERVER
   UPTON                 1.75  1036 AM  8/13  NWS OFFICE
   STONY BROOK           1.59   515 AM  8/13  TRAINED SPOTTER
   SHIRLEY AIRPORT       1.15   800 AM  8/13  ASOS
   SOUTHAMPTON           0.70   940 AM  8/13  TRAINED SPOTTER
   WESTHAMPTON AIRPORT   0.68   800 AM  8/13  ASOS
   ORIENT                0.62  1102 AM  8/13  TRAINED SPOTTER
   1 NNE MONTAUK         0.14   800 AM  8/13  ASOS

...WESTCHESTER COUNTY...
   SCARSDALE             1.40  1115 AM  8/13  TRAINED SPOTTER
   WHITE PLAINS AIRPORT  0.85   800 AM  8/13  ASOS


**********************24 HOUR RAINFALL**********************

LOCATION              24 HOUR     TIME/DATE   COMMENTS
                     RAINFALL           OF
                     /INCHES/   MEASUREMENT

CONNECTICUT

...FAIRFIELD COUNTY...
   3 ENE WESTPORT        1.50   800 AM  8/13  COCORAHS
   3 SSE BROOKFIELD      0.67   700 AM  8/13  COCORAHS

...MIDDLESEX COUNTY...
   1 N WESTBROOK CENTER  2.31   725 AM  8/13  COCORAHS
   3 WSW EAST HAMPTON    0.93   700 AM  8/13  COCORAHS
   1 S PORTLAND          0.87   800 AM  8/13  COCORAHS

...NEW HAVEN COUNTY...
   2 E MILFORD           1.51   900 AM  8/13  COCORAHS
   2 NW NEW HAVEN        1.21   800 AM  8/13  COCORAHS

NEW JERSEY

...BERGEN COUNTY...
   2 S RIVER VALE TWP    0.99  1044 AM  8/13  COCORAHS
   WNW GLEN ROCK         0.81   800 AM  8/13  COCORAHS
   1 E SADDLE BROOK TWP  0.75   730 AM  8/13  COCORAHS
   1 W TENAFLY           0.71   700 AM  8/13  COCORAHS
   1 SSE OAKLAND         0.22   725 AM  8/13  COCORAHS
   WNW OAKLAND           0.16   720 AM  8/13  COCORAHS
   1 ESE OAKLAND         0.08   700 AM  8/13  COCORAHS

...ESSEX COUNTY...
   1 WSW VERONA TWP      0.82   900 AM  8/13  COCORAHS
   1 SE MAPLEWOOD TWP    0.72   700 AM  8/13  COCORAHS
   1 NE CEDAR GROVE TWP  0.62   600 AM  8/13  COCORAHS
   1 NE WEST CALDWELL T  0.58   900 AM  8/13  COCORAHS

...HUDSON COUNTY...
   N HARRISON            0.58   700 AM  8/13  COCORAHS

...PASSAIC COUNTY...
   1 WNW LITTLE FALLS T  0.79   800 AM  8/13  COCORAHS
   S HAWTHORNE           0.66   530 AM  8/13  COCORAHS
   3 SSE RINGWOOD        0.24   820 AM  8/13  COCORAHS

...UNION COUNTY...
   1 ESE NEW PROVIDENCE  0.78   800 AM  8/13  COCORAHS
   1 NNW SUMMIT          0.75   700 AM  8/13  COCORAHS
   1 NW UNION TWP        0.73   800 AM  8/13  COCORAHS
   1 NE WESTFIELD        0.73   645 AM  8/13  COCORAHS
   1 SSE KENILWORTH      0.71  1000 AM  8/13  COCORAHS

NEW YORK

...KINGS COUNTY...
   3 NW BROOKLYN         0.95   700 AM  8/13  COCORAHS

...NASSAU COUNTY...
   E LEVITTOWN           5.66   800 AM  8/13  COCORAHS
   W FLORAL PARK         2.53   700 AM  8/13  COCORAHS

...PUTNAM COUNTY...
   8 NE COLD SPRINGS     0.14   700 AM  8/13  COCORAHS
   4 ESE BEACON          0.08   620 AM  8/13  COCORAHS

...QUEENS COUNTY...
   1 SW MIDDLE VILLAGE   1.43   700 AM  8/13  COCORAHS

...RICHMOND COUNTY...
   1 SE STATEN ISLAND    0.73   730 AM  8/13  COCORAHS

...ROCKLAND COUNTY...
   1 WSW WEST NYACK      0.88   730 AM  8/13  COCORAHS

...SUFFOLK COUNTY...
   1 SSW JAMESPORT       0.73   900 AM  8/13  COCORAHS
   1 S SOUTHOLD          0.69   832 AM  8/13  COCORAHS
   1 WNW EAST MORICHES   0.15   800 AM  8/13  COCORAHS

...WESTCHESTER COUNTY...
   N PEEKSKILL           0.85   830 AM  8/13  COCORAHS
   1 SW YORKTOWN HEIGHT  0.73   800 AM  8/13  COCORAHS
   2 NW SOUTH SALEM      0.72   700 AM  8/13  COCORAHS

$$

JP

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Local Storm Reports

 

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NEW YORK NY
845 PM EDT WED AUG 13 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0113 AM     MARINE TSTM WIND NYC/JFK AIRPORT         40.64N  73.76W
08/13/2014  M41 MPH          QUEENS             NY   ASOS

0140 AM     MARINE TSTM WIND 8 WNW BUOY 44065        40.42N  73.84W
08/13/2014  M43 MPH          ANZ355             NY   MESONET

0245 AM     MARINE TSTM WIND 1 SW BREEZY POINT       40.55N  73.93W
08/13/2014  M42 MPH          QUEENS             NY   MESONET

0358 AM     FLASH FLOOD      FARMINGDALE             40.73N  73.45W
08/13/2014                   NASSAU             NY   BROADCAST MEDIA

            ROAD CLOSED DUE TO FLOODING. ROUTE 110 BETWEEN ROUTE
            109/FARMINGDALE ROAD AND RULAND ROAD.

0403 AM     FLASH FLOOD      MASSAPEQUA              40.67N  73.47W
08/13/2014                   NASSAU             NY   BROADCAST MEDIA

            SUNRISE HIGHWAY/ROUTE 27 CLOSED DUE TO FLOODING BETWEEN
            CARMANS ROAD AND UNQUA ROAD

0410 AM     FLASH FLOOD      FARMINGDALE             40.73N  73.45W
08/13/2014                   NASSAU             NY   FIRE DEPT/RESCUE

            ROUTE 110 CLOSED BOTH WAYS DUE TO FLOODING FROM CONKLIN
            STREET TO SHERWOOD AVE.

0425 AM     FLASH FLOOD      JERICHO                 40.79N  73.54W
08/13/2014                   NASSAU             NY   FIRE DEPT/RESCUE

            ALL LANES CLOSED ON THE NORTHERN STATE PARKWAY AT EXIT
            35

0438 AM     MARINE TSTM WIND 1 E POINT LOOKOUT       40.59N  73.56W
08/13/2014  M39 MPH          NASSAU             NY   MESONET

0501 AM     FLASH FLOOD      DIX HILLS               40.80N  73.34W
08/13/2014                   SUFFOLK            NY   BROADCAST MEDIA

            LONG ISLAND EXPRESSWAY CLOSED AT EXIT 51 DUE TO
            FLOODING.

0501 AM     FLASH FLOOD      BRENTWOOD               40.78N  73.25W
08/13/2014                   SUFFOLK            NY   BROADCAST MEDIA

            SAGTIKOS PARKWAY IS CLOSED SOUTHBOUND AT EXIT S2 DUE TO
            FLOODING.

0509 AM     FLASH FLOOD      BELLMORE                40.66N  73.53W
08/13/2014                   NASSAU             NY   BROADCAST MEDIA

            8 INCHES OF WATER IN THE FIRST FLOOR OF A HOUSE

0515 AM     MARINE TSTM WIND POINT LOOKOUT           40.59N  73.58W
08/13/2014  M41 MPH          NASSAU             NY   MESONET

0525 AM     FLASH FLOOD      1 SE BETHPAGE           40.74N  73.47W
08/13/2014                   NASSAU             NY   BROADCAST MEDIA

            NY 135 CLOSED DUE TO FLOODING AT POWELL AVENUE.

0527 AM     MARINE TSTM WIND 1 WSW ROBERT MOSES STAT 40.62N  73.26W
08/13/2014  M41 MPH          SUFFOLK            NY   MESONET

0530 AM     FLASH FLOOD      NESCONSET               40.85N  73.15W
08/13/2014                   SUFFOLK            NY   FIRE DEPT/RESCUE

            FIRE DEPARTMENT IS DEPLOYING BOATS TO RESCUE TRAPPED
            VEHICLE OCCUPANTS AT NICHOLS ROAD AND ROY DRIVE.

0541 AM     FLASH FLOOD      COMMACK                 40.84N  73.28W
08/13/2014                   SUFFOLK            NY   BROADCAST MEDIA

            JERICHO TPK CLOSED IN BOTH DIRECTIONS IN COMMACK

0542 AM     FLASH FLOOD      MANORVILLE              40.86N  72.79W
08/13/2014                   SUFFOLK            NY   BROADCAST MEDIA

            NY 27 AT RAILROAD AVENUE IS CLOSED DUE TO FLOODING.

0610 AM     FLASH FLOOD      SMITHTOWN               40.86N  73.21W
08/13/2014                   SUFFOLK            NY   BROADCAST MEDIA

            NY 25 CLOSED DUE TO FLOODING AT MAPLE AVENUE

0625 AM     FLASH FLOOD      DIX HILLS               40.80N  73.34W
08/13/2014                   SUFFOLK            NY   BROADCAST MEDIA

            I-495 WESTBOUND CLOSED DUE TO FLOODING BETWEEN EXITS 51
            AND 50

0630 AM     FLASH FLOOD      WEST BABYLON            40.72N  73.35W
08/13/2014                   SUFFOLK            NY   BROADCAST MEDIA

            SOUTHER STATE PARKWAY AT EXIT 37 CLOSED DUE TO
            FLOODING. CARS STRANDED.

0635 AM     FLASH FLOOD      BRANFORD                41.28N  72.81W
08/13/2014                   NEW HAVEN          CT   BROADCAST MEDIA

            CAR SUBMERGED IN WATER OFF I-95

0645 AM     FLASH FLOOD      RONKONKOMA              40.80N  73.12W
08/13/2014                   SUFFOLK            NY   TRAINED SPOTTER

            ESTIMATED 6-12 INCHES OF FLOWING WATER OVER RONKONKOMA
            AVE AND THE INTERSECTION OF WALTESS ROAD

0653 AM     FLASH FLOOD      BAY SHORE               40.73N  73.25W
08/13/2014                   SUFFOLK            NY   BROADCAST MEDIA

            SUNRISE HWY COMPLETELY FLOODED WITH CARS STRANDED IN
            FRONT OF BAY SHORE MALL

0659 AM     FLASH FLOOD      HOLTSVILLE              40.81N  73.05W
08/13/2014                   SUFFOLK            NY   PUBLIC

            NORTH AND SOUTHBOUND RAMPS GOING TO NICOLLS FROM
            EASTBOUND LIE HAVE CARS STUCK

0714 AM     MARINE TSTM WIND 4 ENE PLUM ISLAND       41.20N  72.12W
08/13/2014  M39 MPH          SUFFOLK            NY   MESONET

            GREAT GULL ISLAND MESONET 34 KT

0716 AM     FLASH FLOOD      BABYLON                 40.70N  73.33W
08/13/2014                   SUFFOLK            NY   PUBLIC

            ABOUT 3 FEET OF WATER ON LIVINGSTON AVE

0717 AM     MARINE TSTM WIND 1 WSW ROBERT MOSES STAT 40.62N  73.26W
08/13/2014  M57 MPH          SUFFOLK            NY   MESONET

0720 AM     FLASH FLOOD      ROCKY POINT             40.95N  72.93W
08/13/2014                   SUFFOLK            NY   PUBLIC

            PICTURES OF MULTIPLE CARS STUCK BY HALLOCK LANDING ROAD
            AND CULROSS DRIVE

0723 AM     FLASH FLOOD      AMITYVILLE              40.67N  73.42W
08/13/2014                   SUFFOLK            NY   PUBLIC

            6-10 INCHES OF WATER ON ROAD AND HALFWAY UP GARGAE
            DOORS ON UNION AVE

0724 AM     FLASH FLOOD      ISLIP TERRACE           40.75N  73.19W
08/13/2014                   SUFFOLK            NY   PUBLIC

            RAINFALL UP TO MAILBOXES ON ARGOSY ST

0724 AM     FLASH FLOOD      EAST ISLIP              40.73N  73.19W
08/13/2014                   SUFFOLK            NY   PUBLIC

            ABOUT 2 FEET OF WATER OVER LAGOON PLACE IN EAST ISLIP

0726 AM     FLASH FLOOD      NESCONSET               40.85N  73.15W
08/13/2014                   SUFFOLK            NY   PUBLIC

            BROWNS ROAD CLOSED DUE TO TWO CARS STUCK

0751 AM     FLASH FLOOD      BAY SHORE               40.73N  73.25W
08/13/2014                   SUFFOLK            NY   PUBLIC

            SIGNIFICANT FLOODING IN BAY SHORE TRAIN STATION PARKING
            LOT. AT LEAST 2 FEET OF WATER.

0811 AM     FLASH FLOOD      SELDEN                  40.87N  73.05W
08/13/2014                   SUFFOLK            NY   PUBLIC

            CAR SUBMERGED FULLY IN FLOOD WATERS AT BLUE POINT ROAD
            AND MIDDLE COUNTRY ROAD

0825 AM     FLASH FLOOD      BAY SHORE               40.73N  73.25W
08/13/2014                   SUFFOLK            NY   PUBLIC

            SUNRISE HIGHWAY AND SERVICE ROAD AT 5TH AVENUE EXIT 43
            CLOSED DUE TO FLOODING

0825 AM     FLASH FLOOD      HOLBROOK                40.79N  73.07W
08/13/2014                   SUFFOLK            NY   PUBLIC

            TWO CARS STUCK AT INTERSECTION OF UNION AVE AND MILL
            ROAD DUE TO FLOODING

0830 AM     FLASH FLOOD      WADING RIVER            40.95N  72.82W
08/13/2014                   SUFFOLK            NY   BROADCAST MEDIA

            PARTIAL COLLAPSE OF WEST BOUND LANE ON HULSE LANDING
            ROAD BETWEEN 25A AND SOUND AVENUE

0849 AM     FLASH FLOOD      ISLANDIA                40.81N  73.17W
08/13/2014                   SUFFOLK            NY   NWS EMPLOYEE

            LIE WESTBOUND AT EXIT 57 CLOSED DUE TO FLOODING

0919 AM     FLASH FLOOD      MADISON                 41.28N  72.59W
08/13/2014                   NEW HAVEN          CT   BROADCAST MEDIA

            ROUTE 1 CLOSED UNDER RAILROAD BRIDGE

0922 AM     MARINE TSTM WIND MECOX                   40.91N  72.30W
08/13/2014  M42 MPH          SUFFOLK            NY   MESONET

            MECOX BAY MESONET 37 KNOTS

0926 AM     MARINE TSTM WIND EAST MORICHES           40.81N  72.76W
08/13/2014  M39 MPH          SUFFOLK            NY   MESONET

            MESONET WIND GUST 34 KT

0940 AM     MARINE TSTM WIND 1 S BLUE POINT          40.73N  73.03W
08/13/2014  M48 MPH          SUFFOLK            NY   MESONET

            BLUE POINT MESONET 41.5 KNOTS

0628 PM     MARINE TSTM WIND 1 S MAMARONECK          40.92N  73.73W
08/13/2014  M42 MPH          ANZ335             NY   MESONET

            LARCHMONT HARBOR MESONET 36.7 KNOTS

0636 PM     MARINE TSTM WIND 2 WNW LATTINGTOWN       40.90N  73.63W
08/13/2014  M48 MPH          NASSAU             NY   MESONET

            BAYVILLE MESONET 41.9 KNOTS

0700 PM     MARINE TSTM WIND EATONS NECK             40.95N  73.40W
08/13/2014  M40 MPH          SUFFOLK            NY   MESONET

            EATONS NECK MESONET 34.9 KNOTS


&&

$$

LN

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Additional NWS Products

National Weather Service WFO New York, NY Watches, Warnings, and Advisories

The following links show each Flash Flood Watch, Flash Flood Warning, and Urban Flood Advisory we issued for this historic event. The Flash Flood Watch was issued at 4:04 pm Monday, August 11, 2014. The first flash flood warning was issued at 2:54 am Wednesday, August 13, 2014 for Suffolk and Nassau counties. The first report of flash flooding occurred at 3:58 am.

  1. Flash Flooding:
  2. Urban Flooding:

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