Alert archive / New Jersey / Flash Flood Warnings in 2013

Flash Flood Warning 41, NWS Philadelphia/Mount Holly

July 22, 2013Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 22, 2013, 5:44 PM EDT for Ocean County, New Jersey. It was in force for 4 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 22, 2013, 5:44 PM EDT (21:44 UTC)
Expired: Jul 22, 2013, 9:45 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 22 km from the middle of the area, began a volume at 21:46 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 22, 6:00 PM EDT	FLASH FLOOD	Jackson Twp, NJ	NUMEROUS STREETS FLOODED

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, 9.7 hours before the alert went out and 146 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: 1246 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 490 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

578 
WGUS51 KPHI 222144
FFWPHI
NJC029-230145-
/O.NEW.KPHI.FF.W.0041.130722T2144Z-130723T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
544 PM EDT MON JUL 22 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL OCEAN COUNTY...

* UNTIL 945 PM EDT...

* AT 538 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER NORTH CENTRAL OCEAN
  COUNTY.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CASSVILLE...JACKSON AND JACKSONS MILLS.

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 4011 7421 4002 7426 4005 7444 4017 7439
      4017 7428 4016 7426 4015 7426 4014 7425
      4011 7424

$$

MEOLA

1 follow-up statement

998 
WGUS71 KPHI 230136
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
936 PM EDT MON JUL 22 2013

NJC029-230146-
/O.EXP.KPHI.FF.W.0041.000000T0000Z-130723T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OCEAN NJ-
936 PM EDT MON JUL 22 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 945 PM EDT FOR NORTH
CENTRAL OCEAN 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 4011 7421 4002 7426 4005 7444 4017 7439
      4017 7428 4016 7426 4015 7426 4014 7425
      4011 7424

$$

MEOLA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 3:08 PM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more	8 hr
Jul 22, 3:22 PM EDT	Areal Flood Advisory	PHI	Morris, Somerset	3 hr
Jul 22, 3:45 PM EDT	Special Weather Statement	PHI	Sussex, Warren	2 hr
Jul 22, 4:03 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	3 hr
Jul 22, 4:30 PM EDT	Special Weather Statement	PHI	Ocean	60 min
Jul 22, 4:34 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Jul 22, 4:48 PM EDT	Areal Flood Advisory	PHI	Ocean	3 hr
Jul 22, 5:00 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	75 min
Jul 22, 5:10 PM EDT	Special Weather Statement	PHI	Mercer	65 min
Jul 22, 5:16 PM EDT	Areal Flood Advisory	PHI	Mercer	3 hr
Jul 22, 7:12 PM EDT	Areal Flood Advisory	PHI	Burlington	3 hr
Jul 22, 7:49 PM EDT	Areal Flood Advisory	PHI	Burlington	3 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.