Alert archive / New York / Flash Flood Warnings in 2020

Flash Flood Warning 9, NWS New York, NY

July 6, 20204 counties in New York; 4 counties in New Jersey

NWS New York, NY issued this flash flood warning at Jul 6, 2020, 4:02 PM EDT for 4 counties in New York; 4 counties in New Jersey. It was in force for 115 min. 3 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: Jul 6, 2020, 4:02 PM EDT (20:02 UTC)
Expired: Jul 6, 2020, 5:57 PM EDT
In force: 115 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

Counties Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Passaic County, NJ, Bronx County, NY, Kings County, NY, New York County, NY, Queens County, NY

The radar

The Philadelphia radar (KDIX), 97 km from the middle of the area, began a volume at 20:05 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
Jul 6, 4:18 PM EDT	FLASH FLOOD	Bogota, NJ	MULTIPLE REPORTS OF STREETS FLOODED AND VEHICLES STRANDED
Jul 6, 4:45 PM EDT	FLASH FLOOD	Garfield, NJ	RIVER ROAD IS FLOODED WITH MULTIPLE STRANDED VEHICLES. FIRE DEPARTMENT RESPONDING WITH WATER RESCUE BOATS.
Jul 6, 4:59 PM EDT	FLASH FLOOD	River Edge, NJ	INTERSECTION OF GRAND AVE AND MARGINAL RD FLOODED WITH STRANDED VEHICLE. POLICE AND FIRE DEPT RESPONDING FOR WATER RESCUE.

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, 8.0 hours before the alert went out and 106 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: 100 J/kg
Mixed-layer CIN: -192 J/kg
Mixed-layer LCL: 1959 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

675 
WGUS51 KOKX 062002
FFWOKX
NJC003-013-017-031-NYC005-047-061-081-062300-
/O.NEW.KOKX.FF.W.0009.200706T2002Z-200706T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
402 PM EDT Mon Jul 6 2020

The National Weather Service in Upton NY has issued a

* Flash Flood Warning for...
  Hudson County in northeastern New Jersey...
  Eastern Passaic County in northeastern New Jersey...
  Southeastern Bergen County in northeastern New Jersey...
  Northeastern Essex County in northeastern New Jersey...
  Queens County in southeastern New York...
  Bronx County in southeastern New York...
  Kings County in southeastern New York...
  New York (Manhattan) County in southeastern New York...

* Until 700 PM EDT.

* At 402 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to one inch of rain has
  already fallen. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  New York, Jersey City, Paterson, Passaic, Hoboken, Bloomfield,
  Hackensack, Paramus, Ridgewood, Lyndhurst, Rutherford, Secaucus,
  Ridgefield, Rfk Bridge and Midtown Manhattan.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of urban
areas, highways, streets and underpasses as well as other drainage
areas and low lying spots.

&&

LAT...LON 4067 7403 4067 7405 4066 7406 4090 7430
      4090 7429 4089 7428 4090 7427 4092 7427
      4100 7411 4079 7387 4070 7392 4066 7404

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

NV

1 follow-up statement

702 
WGUS71 KOKX 062157
FFSOKX

Flash Flood Statement
National Weather Service New York NY
557 PM EDT Mon Jul 6 2020

NJC003-013-017-031-NYC005-047-061-081-062207-
/O.CAN.KOKX.FF.W.0009.000000T0000Z-200706T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hudson NJ-Passaic NJ-Bergen NJ-Essex NJ-Queens NY-Bronx NY-Kings NY-
New York (Manhattan) NY-
557 PM EDT Mon Jul 6 2020

...THE FLASH FLOOD WARNING FOR HUDSON...EASTERN PASSAIC...
SOUTHEASTERN BERGEN...NORTHEASTERN ESSEX...QUEENS...BRONX...KINGS AND
NEW YORK (MANHATTAN) COUNTIES IS CANCELLED...

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

Report road closures, deep standing water, overflowing streams or 
creeks, stranded cars, and flooded property to your nearest law 
enforcement agency. They will relay your report to the National 
Weather Service Upton NY.

LAT...LON 4067 7403 4067 7405 4066 7406 4090 7430
      4090 7429 4089 7428 4090 7427 4092 7427
      4100 7411 4079 7387 4070 7392 4066 7404

$$

NV

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 3:02 PM EDT	Special Weather Statement	OKX	New York	43 min
Jul 6, 3:26 PM EDT	Severe Thunderstorm Warning	OKX	Richmond	64 min
Jul 6, 3:28 PM EDT	Areal Flood Advisory	OKX	Richmond	3 hr
Jul 6, 3:31 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, New York, Queens	44 min
Jul 6, 3:34 PM EDT	Special Marine Warning	OKX		56 min
Jul 6, 3:38 PM EDT	Flash Flood Warning	OKX	Richmond	2 hr
Jul 6, 3:59 PM EDT	Severe Thunderstorm Warning	OKX	Kings, New York, Richmond	61 min
Jul 6, 4:33 PM EDT	Areal Flood Advisory	OKX	Kings, Queens	117 min
Jul 6, 4:35 PM EDT	Areal Flood Advisory	OKX	Bronx, New York, Westchester	3 hr
Jul 6, 4:39 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, New York, Queens, Rockland, Westchester	66 min
Jul 6, 4:44 PM EDT	Special Marine Warning	OKX		61 min
Jul 6, 4:49 PM EDT	Flash Flood Warning	OKX	Bronx, Queens, Rockland, Westchester	62 min
Jul 6, 5:03 PM EDT	Severe Thunderstorm Warning	OKX	Nassau, Suffolk	42 min
Jul 6, 5:11 PM EDT	Special Weather Statement	OKX	Westchester	49 min
Jul 6, 5:15 PM EDT	Special Weather Statement	OKX	Orange	60 min
Jul 6, 5:39 PM EDT	Special Marine Warning	OKX		96 min
Jul 6, 6:16 PM EDT	Special Weather Statement	OKX	Orange	44 min
Jul 6, 3:23 PM EDT	Areal Flood Advisory	OKX	Bergen	3 hr
Jul 6, 3:48 PM EDT	Special Weather Statement	OKX	Essex, Union	42 min

Nearby

Flash Flood Warnings in New York, 2020 Flash Flood Warnings in New Jersey, 2020 Every flash flood warning in 2020

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.