Alert archive / New Jersey / Flash Flood Warnings in 2013

Flash Flood Warning 46, NWS Philadelphia/Mount Holly

July 28, 2013Hunterdon County, Morris County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 28, 2013, 5:19 PM EDT for Hunterdon County, Morris County, Somerset County, New Jersey. It was in force for 3 hr. 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: Jul 28, 2013, 5:19 PM EDT (21:19 UTC)
Expired: Jul 28, 2013, 8:15 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 88 km from the middle of the area, began a volume at 21:22 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
Jul 28, 6:20 PM EDT	FLASH FLOOD	Morristown, NJ	FLOODING ON I-287 SOUTH NORTH OF EXIT 35

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, 9.3 hours before the alert went out and 143 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: 958 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 62 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.

342 
WGUS51 KPHI 282119
FFWPHI
NJC019-027-035-290015-
/O.NEW.KPHI.FF.W.0046.130728T2119Z-130729T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
519 PM EDT SUN JUL 28 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN HUNTERDON COUNTY...
  MORRIS COUNTY...
  SOMERSET COUNTY...

* UNTIL 815 PM EDT...

* AT 514 PM EDT...THE NATIONAL WEATHER SERVICE RADAR AND REPORTS     
  FROM THE PUBLIC INDICATE FLASH FLOODING ACROSS THE AREA. RAINFALL  
  TOTALS OF OVER THREE INCHES HAVE OCCURRED AND SEVERE FLOODING HAS  
  ALREAD BEEN REPORTED. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BASKING
  RIDGE...BELLE MEAD...BOONTON...BRIDGEWATER...BUTLER...CHATHAM...
  CHESTER...CLOVERHILL...DOVER...FLAGTOWN...FLORHAM PARK...GREEN
  POND...KINNELON...LINCOLN PARK...MADISON...MARTINSVILLE...
  MENDHAM...MILLINGTON...MORRISTOWN...MORRIS PLAINS...MOUNT
  ARLINGTON...MOUNTAIN LAKES...NETCONG...PEAPACK AND GLADSTONE...
  RIVERDALE...ROCKAWAY...SKILLMAN...SOMERVILLE...WHARTON...WHITE
  HOUSE STATION...BOUND BROOK...BUDD LAKE...CALIFON...EAST HANOVER...
  FAR HILLS...FLEMINGTON...LAKE TELEMARK...LEBANON...LONG VALLEY...
  MANVILLE...MILLSTONE...PARSIPPANY...PEQUANNOCK TOWNSHIP...SOMERSET
  AND SUCCASUNNA.

  ADDITIONAL RAINFALL OF SEVEAL INCHES IS POSSIBLE THIS EVENING      
  WITH SEVERE FLOODING EXPECTED ACROSS MANY AREAS. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. NEVER ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR IN AN
AUTOMOBILE. TURN AROUND DON'T DROWN!

&&

LAT...LON 4090 7434 4074 7437 4068 7445 4067 7440
      4062 7442 4057 7453 4049 7446 4038 7461
      4042 7477 4036 7486 4056 7490 4075 7484
      4079 7489 4091 7478 4092 7465 4109 7450
      4103 7450 4100 7430 4091 7427

$$

FORECASTER:PO

1 follow-up statement

560 
WGUS71 KPHI 282247
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
647 PM EDT SUN JUL 28 2013

NJC019-027-035-290015-
/O.CON.KPHI.FF.W.0046.000000T0000Z-130729T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HUNTERDON NJ-MORRIS NJ-SOMERSET NJ-
647 PM EDT SUN JUL 28 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR
SOMERSET...MORRIS AND EASTERN HUNTERDON COUNTIES...

AT 643 PM EDT...DOPPLER WEATHER RADAR INDICATED THAT MUCH OF THE  
HEAVIEST RAINS HAVE MOVED OUT OF THE WARNED AREA. HOWEVER...AREAS OF 
FLOODING WILL CONTINUE THIS EVENING AND SMALL STREAMS MAY FLOOD OUT 
OF THEIR BANKS. THIS IS ALREADY OCCURRING OVER THE MIDDLE BROOK IN 
SOMERSET COUNTY. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BASKING
RIDGE...BELLE MEAD...BOONTON...BRIDGEWATER...BUTLER...CHATHAM...
CHESTER...CLOVERHILL...DOVER...FLAGTOWN...FLORHAM PARK...GREEN
POND...KINNELON...LINCOLN PARK...MADISON...MARTINSVILLE...MENDHAM...
MILLINGTON...MORRISTOWN...MORRIS PLAINS...MOUNT ARLINGTON...MOUNTAIN
LAKES...NETCONG...PEAPACK AND GLADSTONE...RIVERDALE...ROCKAWAY...
SKILLMAN...SOMERVILLE...WHARTON...WHITE HOUSE STATION...BOUND
BROOK...BUDD LAKE...CALIFON...EAST HANOVER...FAR HILLS...
FLEMINGTON...LAKE TELEMARK...LEBANON...LONG VALLEY...MANVILLE...
MILLSTONE...PARSIPPANY...PEQUANNOCK TOWNSHIP...SOMERSET AND
SUCCASUNNA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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 4090 7434 4074 7437 4068 7445 4067 7440
      4062 7442 4057 7453 4049 7446 4038 7461
      4042 7477 4036 7486 4056 7490 4075 7484
      4079 7489 4091 7478 4092 7465 4109 7450
      4103 7450 4100 7430 4091 7427

$$

FORECASTER:PO

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 2:42 PM EDT	Special Weather Statement	PHI	Gloucester	48 min
Jul 28, 2:57 PM EDT	Special Weather Statement	PHI	Morris	48 min
Jul 28, 3:14 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Sussex, Warren	3 hr
Jul 28, 3:22 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	113 min
Jul 28, 3:36 PM EDT	Severe Thunderstorm Warning	PHI	Morris	39 min
Jul 28, 3:46 PM EDT	Flash Flood Warning	PHI	Camden, Gloucester, Salem	7 hr
Jul 28, 4:07 PM EDT	Special Weather Statement	PHI	Essex	38 min
Jul 28, 4:15 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer	2 hr
Jul 28, 4:25 PM EDT	Special Weather Statement	PHI	Camden	50 min
Jul 28, 4:32 PM EDT	Special Weather Statement	PHI	Hunterdon, Somerset	58 min
Jul 28, 4:47 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	118 min
Jul 28, 5:39 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	36 min
Jul 28, 5:55 PM EDT	Special Weather Statement	PHI	Camden, Gloucester	50 min
Jul 28, 5:58 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	2 hr
Jul 28, 6:28 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	3 hr
Jul 28, 6:38 PM EDT	Special Weather Statement	PHI	Burlington, Camden	37 min
Jul 28, 7:11 PM EDT	Special Weather Statement	PHI	Middlesex	49 min
Jul 28, 7:12 PM EDT	Areal Flood Advisory	PHI	Middlesex	2 hr
Jul 28, 7:29 PM EDT	Special Weather Statement	PHI	Burlington	31 min
Jul 28, 7:43 PM EDT	Areal Flood Advisory	PHI	Burlington, Ocean	2 hr

Nearby

Flash Flood Warnings in New Jersey, 2013 Every flash flood warning in 2013

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.