Alert archive / New Jersey / Flash Flood Warnings in 2016

Flash Flood Warning 22, NWS Philadelphia/Mount Holly

July 16, 2016Atlantic County, Burlington County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 16, 2016, 10:40 PM EDT for Atlantic County, Burlington 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
Jul 16, 2016, 10:40 PM EDT (02:40 UTC)
Expired
Jul 17, 2016, 2:45 AM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Atlantic County, NJ, Burlington County, NJ

The radar

The Philadelphia radar (KDIX), 44 km from the middle of the area, began a volume at 02:43 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.7 hours before the alert went out and 196 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2016-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 785 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2016-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
785 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
975 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
3 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted.

214 
WGUS51 KPHI 170240
FFWPHI
NJC001-005-170645-
/O.NEW.KPHI.FF.W.0022.160717T0240Z-160717T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1040 PM EDT SAT JUL 16 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHEASTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 245 AM EDT
    
* AT 1039 PM EDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN IN THE PAST HOUR. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  EGG HARBOR CITY...WEYMOUTH...WADING RIVER...ELWOOD-MAGNOLIA...
  BATSTO...MAYS LANDING AND FOLSOM.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3961 7446 3945 7474 3955 7486 3972 7460

$$

SFJ
1 follow-up statement
555 
WGUS71 KPHI 170428
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1228 AM EDT SUN JUL 17 2016

NJC001-005-170436-
/O.CAN.KPHI.FF.W.0022.000000T0000Z-160717T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ATLANTIC NJ-BURLINGTON NJ-
1228 AM EDT SUN JUL 17 2016

...THE FLASH FLOOD WARNING FOR CENTRAL ATLANTIC AND SOUTHEASTERN
BURLINGTON COUNTIES IS CANCELLED...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO 
POSE A THREAT. PLEASE CONTINUE TO HEED ANY ROAD CLOSURES.

LAT...LON 3961 7446 3945 7474 3955 7486 3972 7460

$$

LF

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 8:14 PM EDTFlash Flood WarningPHIBurlington, Camden, Gloucester4 hr
Jul 16, 8:18 PM EDTSpecial Weather StatementPHIMorris27 min
Jul 16, 8:21 PM EDTSpecial Marine WarningPHI54 min
Jul 16, 8:23 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Cumberland, Gloucester, Ocean and 1 more4 hr
Jul 16, 8:43 PM EDTSpecial Weather StatementPHIGloucester, Salem32 min
Jul 16, 8:56 PM EDTAreal Flood AdvisoryPHICumberland, Gloucester, Salem4 hr
Jul 16, 9:51 PM EDTSpecial Weather StatementPHIAtlantic24 min
Jul 16, 10:23 PM EDTSpecial Weather StatementPHIAtlantic22 min

Nearby

Flash Flood Warnings in New Jersey, 2016Every flash flood warning in 2016

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.