Alert archive / New Jersey / Flash Flood Warnings in 2013

Flash Flood Warning 33, NWS Philadelphia/Mount Holly

July 1, 20134 counties in New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 1, 2013, 8:55 AM EDT for 4 counties in New Jersey. It was in force for 4 hr. 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 1, 2013, 8:55 AM EDT (12:55 UTC)
Expired: Jul 1, 2013, 1:00 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ

The radar

The Philadelphia radar (KDIX), 96 km from the middle of the area, began a volume at 12:58 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 1, 9:03 AM EDT	FLOOD	Bedminster Twp, NJ	LOCALIZED STREET FLOODING REPORTED IN BEDMINSTER TWP.
Jul 1, 9:15 AM EDT	FLASH FLOOD	Bernards Twp, NJ	RAPIDLY MOVING WATER 15 INCHES DEEP ON ROADS IN BERNARDS TWP.
Jul 1, 9:30 AM EDT	FLASH FLOOD	Parsippany, NJ	STREET FLOODING REPORTED IN PARSIPPANY. STREET IS COMPLETELY COVERED WITH RAPIDLY FLOWING WATER.

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, 0.9 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: 687 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 438 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

003 
WGUS51 KPHI 011255
FFWPHI
NJC027-035-037-041-011700-
/O.NEW.KPHI.FF.W.0033.130701T1255Z-130701T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
855 AM EDT MON JUL 1 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL WARREN COUNTY...
  MORRIS COUNTY...
  SOMERSET COUNTY...
  SOUTHEASTERN SUSSEX COUNTY...

* UNTIL 100 PM EDT...

* AT 854 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY HEAVY RAIN FROM THUNDERSTORMS OVER EAST CENTRAL WARREN...     
  MORRIS...SOMERSET AND SOUTHEASTERN SUSSEX COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SOMERVILLE.

SPOTTER REPORTS AND ESTIMATED RAINFALL FROM DOPPLER RADAR INDICATE 
THAT IN EXCESS OF TWO INCHES OF RAIN ARE FALLING PER HOUR. THESE 
TYPE OF RAIN RATES, ON TOP OF ALREADY WET SOILS, WILL LEAD TO RAPID  
FLOODING. MOVE TO HIGHER GROUND IF NECESSARY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DRIVING INTO FLOOD WATERS COULD COST YOU YOUR LIFE...OR AT THE VERY
LEAST...THOUSANDS OF DOLLARS OF VEHICLE DAMAGE. NEARLY HALF OF ALL
FLASH FLOOD FATALITIES ARE AUTO RELATED. TURN AROUND...DON'T DROWN.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 4120 7437 4104 7450 4100 7431 4090 7427
      4090 7433 4074 7436 4068 7445 4061 7443
      4057 7453 4049 7446 4038 7460 4038 7472
      4050 7479 4062 7470 4072 7472 4074 7483
      4089 7500 4100 7487 4095 7481 4125 7445

$$

KRUZDLO

2 follow-up statements

015 
WGUS71 KPHI 011357
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
957 AM EDT MON JUL 1 2013

NJC027-035-037-041-011700-
/O.CON.KPHI.FF.W.0033.000000T0000Z-130701T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WARREN NJ-MORRIS NJ-SOMERSET NJ-SUSSEX NJ-
957 AM EDT MON JUL 1 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 PM EDT FOR
SOUTHEASTERN SUSSEX...SOMERSET...MORRIS AND EAST CENTRAL WARREN
COUNTIES...

AT 954 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED 
THAT NEARLY 3.00 INCHES OF RAIN HAD FALLEN THIS MORNING ACROSS 
PORTIONS OF THE WARNED AREA. A FEW SPOTTER REPORTS INDICATED THAT UP 
TO 2.00 INCHES OF THIS RAIN HAD FALLEN IN ABOUT THIRTY MINUTES.

EVEN THOUGH THE RAIN HAS MOVED OUT OF PORTIONS OF THE WARNED AREA, 
DUE TO THESE EXTRAORDINARY HIGH RAINFALL RATES, THE WARNING WILL 
REMAIN IN EFFECT UNTIL 100 PM.  


LAT...LON 4120 7437 4104 7450 4100 7431 4090 7427
      4090 7433 4074 7436 4068 7445 4061 7443
      4057 7453 4049 7446 4038 7460 4038 7472
      4050 7479 4062 7470 4072 7472 4074 7483
      4089 7500 4100 7487 4095 7481 4125 7445

$$

KRUZDLO

385 
WGUS71 KPHI 011652
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1252 PM EDT MON JUL 1 2013

NJC027-035-037-041-011701-
/O.EXP.KPHI.FF.W.0033.000000T0000Z-130701T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WARREN NJ-MORRIS NJ-SOMERSET NJ-SUSSEX NJ-
1252 PM EDT MON JUL 1 2013

...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHEASTERN SUSSEX...
SOMERSET...MORRIS AND EAST CENTRAL WARREN COUNTIES...

THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND NO LONGER
POSE A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH FLOOD
WARNING WAS ALLOWED TO EXPIRE.

MORE RAIN IS EXPECTED THIS AFTERNOON. ADDITIONAL WARNINGS ARE 
POSSIBLE. REMAIN VIGILANT.

REMEMBER, DRIVING INTO FLOOD WATERS COULD PUT YOUR LIFE AT RISK AND 
COST YOU THOUSANDS OF DOLLARS IN VEHICLE REPAIRS. FLOOD WATERS MAY 
BE DEEPER THAN YOU THINK. TURN AROUND AND FIND AN ALTERNATE ROUTE.

LAT...LON 4120 7437 4104 7450 4100 7431 4090 7427
      4090 7433 4074 7436 4068 7445 4061 7443
      4057 7453 4049 7446 4038 7460 4038 7472
      4050 7479 4062 7470 4072 7472 4074 7483
      4089 7500 4100 7487 4095 7481 4125 7445

$$

KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 4:07 AM EDT	Special Weather Statement	PHI	Sussex	38 min
Jul 1, 5:37 AM EDT	Flash Flood Warning	PHI	Warren	6 hr
Jul 1, 6:49 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Sussex, Warren	4 hr
Jul 1, 7:09 AM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	4 hr
Jul 1, 7:47 AM EDT	Special Weather Statement	PHI	Hunterdon, Somerset	58 min
Jul 1, 8:03 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	4 hr
Jul 1, 8:07 AM EDT	Flash Flood Warning	PHI	Hunterdon	4 hr
Jul 1, 8:25 AM EDT	Flash Flood Warning	PHI	Sussex	4 hr
Jul 1, 8:39 AM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset	66 min
Jul 1, 10:30 AM EDT	River Flood Warning	PHI	Hunterdon, Somerset	5 hr
Jul 1, 10:52 AM EDT	Areal Flood Warning	PHI	Hunterdon, Morris, Somerset	13 hr
Jul 1, 12:05 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	4 hr
Jul 1, 12:28 PM EDT	River Flood Warning	PHI	Burlington	40 hr
Jul 1, 12:36 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	4 hr
Jul 1, 2:14 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	4 hr
Jul 1, 5:38 PM EDT	River Flood Warning	PHI	Somerset	4 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.