Alert archive / New Jersey / Flash Flood Warnings in 2013

Flash Flood Warning 50, NWS Philadelphia/Mount Holly

August 9, 2013Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 9, 2013, 7:34 AM EDT for Sussex County, New Jersey. It was in force for 4 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: Aug 9, 2013, 7:34 AM EDT (11:34 UTC)
Expired: Aug 9, 2013, 11:30 AM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 145 km from the middle of the area, began a volume at 11:34 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 00:00Z, 11.6 hours before the alert went out and 164 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: 349 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 696 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

475 
WGUS51 KPHI 091134
FFWPHI
NJC037-091530-
/O.NEW.KPHI.FF.W.0050.130809T1134Z-130809T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
734 AM EDT FRI AUG 9 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SUSSEX COUNTY...

* UNTIL 1130 AM EDT...

* AT 729 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  THAT VERY HEAVY RAIN HAS MOVED THROUGH THE COUNTY WITH UP TO FOUR
  INCHES ESTIMATED OFF OF DOPPLER RADAR. ADDITIONAL SHOWERS WITH 
  HEAVY RAIN ARE MOVING TOWARD THE COUNTY AND COULD DROP LOCALLY
  AROUND ANOTHER INCH.

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

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

&&

LAT...LON 4125 7446 4097 7482 4111 7499 4118 7489
      4121 7487 4124 7487 4132 7480 4135 7476
      4136 7469

$$

TFG

1 follow-up statement

862 
WGUS71 KPHI 091528
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1128 AM EDT FRI AUG 9 2013

NJC037-091537-
/O.EXP.KPHI.FF.W.0050.000000T0000Z-130809T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX NJ-
1128 AM EDT FRI AUG 9 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1130 AM EDT FOR SUSSEX
COUNTY...

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

LAT...LON 4125 7446 4097 7482 4111 7499 4118 7489
      4121 7487 4124 7487 4132 7480 4135 7476
      4136 7469

$$

KLINE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 3:55 AM EDT	Small Craft Advisory	PHI		16 hr
Aug 9, 6:30 AM EDT	Areal Flood Advisory	PHI	Sussex, Warren	4 hr
Aug 9, 8:03 AM EDT	Flash Flood Watch	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	11 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.