Alert archive / New York / Flash Flood Warnings in 2018

Flash Flood Warning 2, NWS New York, NY

April 16, 20185 counties in New Jersey; 8 counties in New York; Greater Bridgeport Planning Region, Connecticut

NWS New York, NY issued this flash flood warning at Apr 16, 2018, 11:21 AM EDT for 5 counties in New Jersey; 8 counties in New York; Greater Bridgeport Planning Region, Connecticut. It was in force for 3 hr. 8 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: Apr 16, 2018, 11:21 AM EDT (15:21 UTC)
Expired: Apr 16, 2018, 2:15 PM EDT
In force: 3 hr
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

Counties Greater Bridgeport Planning Region, CT, Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Passaic County, NJ, Union County, NJ, Bronx County, NY, Kings County, NY, New York County, NY, Orange County, NY, Queens County, NY, Richmond County, NY, Rockland County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 107 km from the middle of the area, began a volume at 15:22 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
Apr 16, 11:27 AM EDT	FLASH FLOOD	Astoria, NY	GRAND CENTRAL PARKWAY CLOSED IN BOTH DIRECTIONS DUE TO FLOODING AT 48TH STREET.
Apr 16, 11:32 AM EDT	FLASH FLOOD	Lodi, NJ	MAIN STREET CLOSED IN BOTH DIRECTIONS SOUTH OF SIDNEY STREET BY LOCAL LAW ENFORECEMENT DUE TO FLOODING.
Apr 16, 12:10 PM EDT	COASTAL FLOOD	Stratford, CT	PARKING LOT FLOODED AT BIRDSEYE MARINE.
Apr 16, 12:15 PM EDT	FLASH FLOOD	Bridgeport, CT	ENTRANCE RAMP TO 1-95 FROM SURF AVENUE CLOSED DUE TO FLOODING.
Apr 16, 12:15 PM EDT	FLASH FLOOD	Stratford, CT	INTERSECTION OF BRUCE AVENUE AND STRATFORD AVENUE WAS CLOSED DUE TO FLOODING.
Apr 16, 12:15 PM EDT	FLASH FLOOD	Stratford, CT	INTERSECTION OF KING STREET AND BROADBRIDGE AVENUE IMPASSABLE DUE TO FLOODING.
Apr 16, 12:47 PM EDT	FLASH FLOOD	Newark, NJ	CARS STRANDED DUE TO FLOODING AT THE INTERSECTION OF FRELINGHUYSEN AVENUE AND TOLER PLACE.
Apr 16, 1:08 PM EDT	FLASH FLOOD	Hasbrouck Heights, NJ	ROUTE 17 NORTHBOUND CLOSED ABOVE ROUTE 46

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, 3.4 hours before the alert went out and 107 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: 7 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 391 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 902 m²/s²
0-3 km storm-relative helicity: 990 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

358 
WGUS51 KOKX 161521
FFWOKX
CTC001-NJC003-013-017-031-039-NYC005-047-061-071-081-085-087-119-
161815-
/O.NEW.KOKX.FF.W.0002.180416T1521Z-180416T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
1121 AM EDT MON APR 16 2018

The National Weather Service in Upton NY has issued a

* Flash Flood Warning for...
  Fairfield County in southern Connecticut...
  Hudson County in northeastern New Jersey...
  Passaic County in northeastern New Jersey...
  Union County in northeastern New Jersey...
  Bergen County in northeastern New Jersey...
  Essex County in northeastern New Jersey...
  Orange County in southeastern New York...
  Queens County in southeastern New York...
  Richmond County in southeastern New York...
  Bronx County in southeastern New York...
  Kings County in southeastern New York...
  Rockland County in southeastern New York...
  Westchester County in southeastern New York...
  New York (Manhattan) County in southeastern New York...

* Until 215 PM EDT

* At 1118 AM EDT, Doppler radar indicated heavy rain across the 
  warned area. Up to two inches of rain have already fallen. 
  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.

* Some locations that will experience flooding include...
  Newark, Jersey City, Jamaica, Yonkers, Paterson, Bridgeport,
  Elizabeth, Stamford, Flatbush, Norwalk, Danbury, New Rochelle,
  Flushing, Passaic and Bayonne.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4149 7476 4150 7448 4163 7426 4159 7395
      4132 7398 4137 7355 4151 7339 4129 7308
      4117 7311 4091 7375 4060 7375 4060 7404
      4050 7426 4060 7422 4060 7446 4091 7427
      4100 7430 4104 7450 4120 7437 4136 7469

$$

FIG

1 follow-up statement

046 
WGUS71 KOKX 161815
FFSOKX

Flash Flood Statement
National Weather Service New York NY
215 PM EDT MON APR 16 2018

CTC001-NJC003-013-017-031-039-NYC005-047-061-071-081-085-087-119-
161824-
/O.EXP.KOKX.FF.W.0002.000000T0000Z-180416T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fairfield CT-Hudson NJ-Passaic NJ-Union NJ-Bergen NJ-Essex NJ-
Orange NY-Queens NY-Richmond NY-Bronx NY-Kings NY-Rockland NY-
Westchester NY-New York (Manhattan) NY-
215 PM EDT MON APR 16 2018

...THE FLASH FLOOD WARNING FOR FAIRFIELD...HUDSON...PASSAIC...
UNION...BERGEN...ESSEX...ORANGE...QUEENS...RICHMOND...BRONX...
KINGS...ROCKLAND...WESTCHESTER AND NEW YORK (MANHATTAN) COUNTIES WILL
EXPIRE AT 215 PM EDT...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed to any remaining road closures.

LAT...LON 4149 7476 4150 7448 4163 7426 4159 7395
      4132 7398 4137 7355 4151 7339 4129 7308
      4117 7311 4091 7375 4060 7375 4060 7404
      4050 7426 4060 7422 4060 7446 4091 7427
      4100 7430 4104 7450 4120 7437 4136 7469

$$

FIG

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 6:26 AM EDT	Areal Flood Advisory	OKX	Bergen, Essex, Hudson, Passaic, Union	4 hr
Apr 16, 7:19 AM EDT	Flash Flood Warning	OKX	Bergen, Essex, Hudson, Passaic, Union	4 hr
Apr 16, 11:25 AM EDT	River Flood Warning	OKX	Bergen	13 hr
Apr 16, 2:20 PM EDT	Areal Flood Advisory	OKX	Bergen, Essex, Hudson, Passaic, Union	115 min
Apr 16, 5:26 PM EDT	Areal Flood Advisory	OKX	Bergen	3 hr
Apr 16, 8:34 AM EDT	Areal Flood Advisory	OKX	Nassau, Suffolk	3 hr
Apr 16, 10:23 AM EDT	Special Weather Statement	OKX	Suffolk	37 min
Apr 16, 10:28 AM EDT	Areal Flood Advisory	OKX	Suffolk	3 hr
Apr 16, 11:55 AM EDT	Areal Flood Advisory	OKX	Nassau, Suffolk	2 hr
Apr 16, 1:47 PM EDT	Small Craft Advisory	OKX		54 hr
Apr 16, 2:13 PM EDT	Coastal Flood Statement	OKX	Nassau, Queens, Suffolk	12 hr
Apr 16, 12:35 PM EDT	Areal Flood Advisory	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	115 min

Nearby

Flash Flood Warnings in New York, 2018 Flash Flood Warnings in New Jersey, 2018 Flash Flood Warnings in Connecticut, 2018 Every flash flood warning in 2018

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.