Alert archive / New York / Flash Flood Warnings in 2018

Flash Flood Warning 9, NWS New York, NY

July 25, 2018Orange County, New York; Passaic County, New Jersey

NWS New York, NY issued this flash flood warning at Jul 25, 2018, 4:33 PM EDT for Orange County, New York; Passaic County, New Jersey. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 25, 2018, 4:33 PM EDT (20:33 UTC)
Expired: Jul 25, 2018, 8:00 PM EDT
In force: 3 hr
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

Counties Passaic County, NJ, Orange County, NY

The radar

The Brookhaven radar (KOKX), 119 km from the middle of the area, began a volume at 20:32 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.6 hours before the alert went out and 119 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: 922 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 546 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: -31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

581 
WGUS51 KOKX 252033
FFWOKX
NJC031-NYC071-252230-
/O.NEW.KOKX.FF.W.0009.180725T2033Z-180725T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
433 PM EDT WED JUL 25 2018

The National Weather Service in Upton NY has issued a

* Flash Flood Warning for...
  Central Passaic County in northeastern New Jersey...
  Southeastern Orange County in southeastern New York...

* Until 630 PM EDT.

* At 432 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Ringwood, Monroe, Harriman and Tuxedo Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4133 7421 4129 7409 4120 7415 4115 7423
      4114 7423 4113 7421 4109 7424 4112 7434

$$

MD

2 follow-up statements

955 
WGUS51 KOKX 252125
FFWOKX
NJC031-NYC071-260000-
/O.EXT.KOKX.FF.W.0009.000000T0000Z-180726T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
525 PM EDT WED JUL 25 2018

The National Weather Service in Upton NY has extended the

* Flash Flood Warning for...
  Central Passaic County in northeastern New Jersey...
  Southeastern Orange County in southeastern New York...

* Until 800 PM EDT.

* At 524 PM EDT, Doppler radar indicated heavy rain across the warned
  area. Flash flooding may already be occurring.

* Some locations that will experience flooding include...
  Ringwood, Monroe, Harriman and Tuxedo Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4133 7421 4129 7409 4120 7415 4115 7423
      4114 7423 4113 7421 4109 7424 4112 7434

$$

MD

736 
WGUS71 KOKX 252350
FFSOKX

Flash Flood Statement
National Weather Service New York NY
750 PM EDT WED JUL 25 2018

NJC031-NYC071-260000-
/O.EXP.KOKX.FF.W.0009.000000T0000Z-180726T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Passaic NJ-Orange NY-
750 PM EDT WED JUL 25 2018

...THE FLASH FLOOD WARNING FOR CENTRAL PASSAIC AND SOUTHEASTERN
ORANGE COUNTIES WILL EXPIRE AT 800 PM EDT...

The heavy rain has ended. Although flooding is no longer expected to 
pose a threat in the near term, additional rainfall is possible 
tonight. Please continue to heed any remaining road closures.

LAT...LON 4133 7421 4129 7409 4120 7415 4115 7423
      4114 7423 4113 7421 4109 7424 4112 7434

$$

MD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 6:07 AM EDT	Areal Flood Advisory	OKX	Bronx, Kings, New York, Queens, Richmond, Rockland and 1 more	113 min
Jul 25, 6:50 AM EDT	Special Weather Statement	OKX	Putnam, Rockland	40 min
Jul 25, 3:38 PM EDT	Rip Current Statement	OKX	Kings, Nassau, Queens, Suffolk	28 hr
Jul 25, 4:24 PM EDT	Areal Flood Advisory	OKX	Orange	66 min
Jul 25, 6:42 PM EDT	Areal Flood Advisory	OKX	Orange	93 min
Jul 25, 6:43 PM EDT	Flash Flood Watch	OKX	Bronx, Kings, New York, Orange, Putnam, Queens and 3 more	9 hr
Jul 25, 7:03 PM EDT	Flash Flood Warning	OKX	Orange	117 min
Jul 25, 4:30 AM EDT	Areal Flood Advisory	OKX	Essex, Passaic, Union	2 hr
Jul 25, 3:44 PM EDT	Areal Flood Advisory	OKX	Passaic	61 min
Jul 25, 3:56 PM EDT	Flash Flood Warning	OKX	Passaic	3 hr

Nearby

Flash Flood Warnings in New York, 2018 Flash Flood Warnings in New Jersey, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.