Alert archive / New York / Flash Flood Warnings in 2011

Flash Flood Warning 7, NWS New York, NY

June 23, 2011Suffolk County, New York

NWS New York, NY issued this flash flood warning at Jun 23, 2011, 2:03 PM EDT for Suffolk County, New York. It was in force for 117 min. 4 reports 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: Jun 23, 2011, 2:03 PM EDT (18:03 UTC)
Expired: Jun 23, 2011, 4:00 PM EDT
In force: 117 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

County Suffolk County, NY

The radar

The Brookhaven radar (KOKX), 11 km from the middle of the area, began a volume at 18:05 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

Time	Report	Where	Remark
Jun 23, 2:53 PM EDT	FLASH FLOOD	Mount Sinai, NY	CAR TRAPPED WITH WATER UP TO BOTTOM OF THE CAR DOOR ON BROOK HOLLOW ROAD. ROAD CLOSED.
Jun 23, 3:50 PM EDT	FLASH FLOOD	Cutchogue, NY	NEW SUFFOLK AVE CLOSED FOR ONE AND A HALF HOURS DUE TO FLOODING.
Jun 23, 4:00 PM EDT	FLASH FLOOD	Orient, NY	BASEMENT FLOODING ON OLD FARM ROAD... ALONG WITH MAIN STREET PUMP HOUSE WITH ONE FOOT OF WATER. TIME ESTIMATED FROM RADAR.
Jun 23, 4:10 PM EDT	FLASH FLOOD	Greenport, NY	INTERSECTION OF SUN STREET AND 1ST STREET CLOSED DUE TO FLOODING.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.1 hours before the alert went out and 11 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 414 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 575 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 59 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.

735 
WGUS51 KOKX 231803
FFWOKX
NYC103-232000-
/O.NEW.KOKX.FF.W.0007.110623T1803Z-110623T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
203 PM EDT THU JUN 23 2011

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

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

* UNTIL 400 PM EDT...

* AT 159 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM THUNDERSTORMS OVER THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

&&

LAT...LON 4086 7243 4088 7248 4086 7245 4083 7248
      4069 7299 4074 7288 4075 7301 4070 7314
      4069 7326 4073 7344 4093 7339 4091 7323
      4098 7312 4099 7263 4115 7229 4111 7228
      4111 7233 4109 7228 4098 7225

$$

MALOIT

1 follow-up statement

050 
WGUS71 KOKX 231908
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
308 PM EDT THU JUN 23 2011

NYC103-232000-
/O.CON.KOKX.FF.W.0007.000000T0000Z-110623T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUFFOLK NY-
308 PM EDT THU JUN 23 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM EDT FOR
SUFFOLK COUNTY...

AT 306 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED
AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL RATES OF UP TO TWO INCHES AN HOUR ARE POSSIBLE 
IN THE WARNED AREA.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 4086 7243 4088 7248 4086 7245 4083 7248
      4069 7299 4074 7288 4075 7301 4070 7314
      4069 7326 4073 7344 4093 7339 4091 7323
      4098 7312 4099 7263 4115 7229 4111 7228
      4111 7233 4109 7228 4098 7225

$$

MALOIT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 12:59 AM EDT	Marine Dense Fog Advisory	OKX		9 hr
Jun 23, 8:55 AM EDT	Areal Flood Advisory	OKX	Orange	50 min
Jun 23, 9:45 AM EDT	Areal Flood Advisory	OKX	Orange	2 hr
Jun 23, 10:13 AM EDT	Special Weather Statement	OKX	Rockland	62 min
Jun 23, 10:51 AM EDT	Flash Flood Warning	OKX	Orange, Rockland	6 hr
Jun 23, 11:10 AM EDT	Severe Thunderstorm Warning	OKX	Orange, Rockland, Westchester	50 min
Jun 23, 11:59 AM EDT	Severe Thunderstorm Warning	OKX	Westchester	46 min
Jun 23, 12:16 PM EDT	Areal Flood Advisory	OKX	Westchester	59 min
Jun 23, 12:23 PM EDT	Flash Flood Warning	OKX	Westchester	4 hr
Jun 23, 1:24 PM EDT	Areal Flood Advisory	OKX	Nassau, Suffolk	66 min
Jun 23, 1:58 PM EDT	Special Weather Statement	OKX	Suffolk	62 min
Jun 23, 3:38 PM EDT	Flash Flood Warning	OKX	Suffolk	118 min
Jun 23, 4:47 PM EDT	Areal Flood Warning	OKX	Orange, Rockland	18 hr

Nearby

Flash Flood Warnings in New York, 2011 Every flash flood warning in 2011

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.