Alert archive / New York / Flash Flood Warnings in 2012

Flash Flood Warning 33, NWS New York, NY

October 4, 2012Orange County, Rockland County, New York; Bergen County, Passaic County, New Jersey

NWS New York, NY issued this flash flood warning at Oct 4, 2012, 4:17 PM EDT for Orange County, Rockland County, New York; Bergen County, Passaic County, New Jersey. It was in force for 118 min. 1 report 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: Oct 4, 2012, 4:17 PM EDT (20:17 UTC)
Expired: Oct 4, 2012, 6:15 PM EDT
In force: 118 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

Counties Bergen County, NJ, Passaic County, NJ, Orange County, NY, Rockland County, NY

The radar

The Philadelphia radar (KDIX), 128 km from the middle of the area, began a volume at 20:17 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
Oct 4, 5:35 PM EDT	FLASH FLOOD	1 N Spring Valley, NY	UNION ROAD CLOSED AT STONEHOUSE ROAD 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, 8.3 hours before the alert went out and 131 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 474 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: -28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

887 
WGUS51 KOKX 042017
FFWOKX
NJC003-031-NYC071-087-042215-
/O.NEW.KOKX.FF.W.0033.121004T2017Z-121004T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
417 PM EDT THU OCT 4 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PASSAIC COUNTY IN NORTHEAST NEW JERSEY...
  NORTHWESTERN BERGEN COUNTY IN NORTHEAST NEW JERSEY...
  ROCKLAND COUNTY IN SOUTHEAST NEW YORK...
  SOUTHERN ORANGE COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 615 PM EDT...

* AT 413 PM EDT...THE PUBLIC REPORTED VERY HEAVY RAIN FROM SHOWERS   
  AND THUNDERSTORMS OVER THE WARNED AREA. UP TO ONE INCH IN 30       
  MINUTES HAVE BEEN REPORTED. ADDITIONAL RAINFALL UP TO ONE INCH IS
  POSSIBLE WITH THESE SHOWERS AND THUNDERSTORMS.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4107 7449 4109 7450 4120 7437 4123 7443
      4135 7434 4119 7395 4098 7420 4101 7439
      4103 7442 4102 7443 4105 7445 4103 7449
      4104 7450

$$

MET

2 follow-up statements

032 
WGUS71 KOKX 042134
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
534 PM EDT THU OCT 4 2012

NYC071-042142-
/O.CAN.KOKX.FF.W.0033.000000T0000Z-121004T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ORANGE NY-
534 PM EDT THU OCT 4 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL
ORANGE COUNTY...

HEAVY RAINFALL HAS MOVED OUT OF THE AREA. THERE WERE NO REPORTS OF 
FLOODING. THEREFORE THE FLASH FLOOD WARNING HAS BEEN CANCELLED.

LAT...LON 4118 7432 4114 7423 4125 7409 4119 7395
      4098 7420 4101 7439 4103 7442 4102 7443
      4105 7445 4106 7445

$$

NJC003-031-NYC087-042215-
/O.CON.KOKX.FF.W.0033.000000T0000Z-121004T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ROCKLAND NY-BERGEN NJ-PASSAIC NJ-
534 PM EDT THU OCT 4 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR
PASSAIC...NORTHWESTERN BERGEN AND ROCKLAND COUNTIES...

AT 529 PM EDT...THE PUBLIC REPORTED UP TO 1.5 INCHES OF RAINFALL IN 
LESS THAN AN HOUR ACROSS PORTIONS OF THE WARNED AREA. NO FLOODING 
HAS BEEN REPORTED AT THIS TIME. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 4118 7432 4114 7423 4125 7409 4119 7395
      4098 7420 4101 7439 4103 7442 4102 7443
      4105 7445 4106 7445

$$

967 
WGUS71 KOKX 042208
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
608 PM EDT THU OCT 4 2012

NJC003-031-NYC087-042216-
/O.EXP.KOKX.FF.W.0033.000000T0000Z-121004T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ROCKLAND NY-BERGEN NJ-PASSAIC NJ-
608 PM EDT THU OCT 4 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM EDT FOR PASSAIC...
NORTHWESTERN BERGEN AND ROCKLAND COUNTIES...

HEAVY RAIN HAS MOVED OUT OF THE AREA. SOME AREA ROADS WERE REPORTED 
TO BE CLOSED DUE TO FLOODING. NO ADDITIONAL RAINFALL OR FLOODING IS 
EXPECTED AT THIS TIME...THEREFORE THE WARNING WILL BE ALLOWED TO 
EXPIRE.

LAT...LON 4118 7432 4114 7423 4125 7409 4119 7395
      4098 7420 4101 7439 4103 7442 4102 7443
      4105 7445 4106 7445

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 4, 4:31 PM EDT	Special Weather Statement	OKX	Orange	44 min
Oct 4, 4:46 PM EDT	Marine Dense Fog Advisory	OKX		17 hr
Oct 4, 5:18 PM EDT	Special Weather Statement	OKX	Rockland, Westchester	42 min
Oct 4, 5:47 PM EDT	Special Weather Statement	OKX	Westchester	43 min
Oct 4, 6:13 PM EDT	Special Weather Statement	OKX	Westchester	47 min
Oct 4, 6:45 PM EDT	Special Marine Warning	OKX		3 min
Oct 4, 3:41 PM EDT	Special Weather Statement	OKX	Passaic	49 min
Oct 4, 4:53 PM EDT	Special Weather Statement	OKX	Union	52 min

Nearby

Flash Flood Warnings in New York, 2012 Flash Flood Warnings in New Jersey, 2012 Every flash flood warning in 2012

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.