Alert archive / New Jersey / Flash Flood Warnings in 2015

Flash Flood Warning 12, NWS Philadelphia/Mount Holly

June 15, 2015Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 15, 2015, 5:48 PM 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: Jun 15, 2015, 5:48 PM EDT (21:48 UTC)
Expired: Jun 15, 2015, 9:45 PM 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), 148 km from the middle of the area, began a volume at 21:49 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, 9.8 hours before the alert went out and 159 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: 456 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 397 m²/s²
0-3 km storm-relative helicity: 607 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

159 
WGUS51 KPHI 152148
FFWPHI
NJC037-160145-
/O.NEW.KPHI.FF.W.0012.150615T2148Z-150616T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
548 PM EDT MON JUN 15 2015

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN SUSSEX COUNTY IN NORTHWESTERN NEW JERSEY...

* UNTIL 945 PM EDT
    
* AT 545 PM EDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. OVER TWO INCHES OF RAIN HAVE 
  ALREADY FALLEN IN SOME AREAS AND MORE RAIN IS MOVING IN FROM THE 
  NORTHWEST.  ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES IS 
  POSSIBLE. FLASH FLOODING IS LIKELY WHERE THE HEAVIEST RAIN OCCURS.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MONTAGUE...FRANKLIN...HAMBURG...OGDENSBURG...SUSSEX...MILFORD...
  HAINESVILLE...VERNON VALLEY...PELLETTOWN...HIGHLAND LAKE AND HIGH
  POINT.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 4120 7437 4101 7459 4125 7485 4127 7484
      4131 7479 4132 7480 4133 7476 4135 7475
      4135 7471

$$

NIERENBERG

1 follow-up statement

406 
WGUS71 KPHI 160025
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
825 PM EDT MON JUN 15 2015

NJC037-160034-
/O.CAN.KPHI.FF.W.0012.000000T0000Z-150616T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX NJ-
825 PM EDT MON JUN 15 2015

...THE FLASH FLOOD WARNING FOR NORTHEASTERN SUSSEX COUNTY IS
CANCELLED...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT.

LAT...LON 4120 7437 4101 7459 4125 7485 4127 7484
      4131 7479 4132 7480 4133 7476 4135 7475
      4135 7471

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 8:15 PM EDT	Special Weather Statement	PHI	Salem	30 min
Jun 14, 8:33 PM EDT	Special Weather Statement	PHI	Hunterdon, Warren	27 min
Jun 14, 8:39 PM EDT	Special Weather Statement	PHI	Cumberland, Salem	36 min
Jun 14, 8:55 PM EDT	Special Weather Statement	PHI	Hunterdon, Mercer, Morris, Somerset, Sussex, Warren	50 min
Jun 14, 9:07 PM EDT	Special Weather Statement	PHI	Cumberland	38 min
Jun 14, 10:23 PM EDT	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 3 more	4 hr
Jun 15, 3:43 PM EDT	Areal Flood Advisory	PHI	Morris	4 hr
Jun 15, 4:02 PM EDT	Areal Flood Advisory	PHI	Sussex	4 hr
Jun 15, 6:50 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	4 hr

Nearby

Flash Flood Warnings in New Jersey, 2015 Every flash flood warning in 2015

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.