Alert archive / New Jersey / Flash Flood Warnings in 2015

Flash Flood Warning 41, NWS Philadelphia/Mount Holly

July 26, 2015Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 26, 2015, 8:42 PM EDT for Sussex County, New Jersey. It was in force for 4 hr. 2 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 26, 2015, 8:42 PM EDT (00:42 UTC)
Expired
Jul 27, 2015, 12:45 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 Binghamton radar (KBGM), 143 km from the middle of the area, began a volume at 00:44 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

TimeReportWhereRemark
Jul 26, 8:45 PM EDTHEAVY RAIN 2.571 Ssw Montague, NJAWS RAIN GAUGE. 70 MINUTE TOTAL.
Jul 26, 11:59 PM EDTHEAVY RAIN 2.881 Ssw Montague, NJEVENT TOTAL... 2.57 INCHES IN 70 MINUTES ENDING 845 PM.

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 00:00Z, 0.7 hours before the alert went out and 165 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, Brookhaven, NY at 00:00Z on 2015-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 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, Brookhaven, NY at 00:00Z on 2015-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 square meters per square second.19395878Sfc1 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
35 J/kg
Mixed-layer CIN
-175 J/kg
Mixed-layer LCL
1409 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
93 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

068 
WGUS51 KPHI 270042
FFWPHI
NJC037-270445-
/O.NEW.KPHI.FF.W.0041.150727T0042Z-150727T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
842 PM EDT SUN JUL 26 2015

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

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

* UNTIL 1245 AM EDT
    
* AT 841 PM EDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED A
  THUNDERSTORM PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO
  INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MONTAGUE...MILFORD...HAINESVILLE AND HIGH POINT. 

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4133 7464 4117 7467 4115 7490 4128 7484
      4131 7479 4132 7480 4132 7479 4133 7476
      4135 7475 4136 7469

$$

JRK
2 follow-up statements
193 
WGUS71 KPHI 270154
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
954 PM EDT SUN JUL 26 2015

NJC037-270445-
/O.CON.KPHI.FF.W.0041.000000T0000Z-150727T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX NJ-
954 PM EDT SUN JUL 26 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 AM EDT FOR
NORTHWESTERN SUSSEX COUNTY...

AT 953 PM EDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED 
THUNDERSTORMS PRODUCING HEAVY RAIN OVER THE WARNED AREA. UP TO THREE 
INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING MAY ALREADY BE 
OCCURRING OR BEGINNING SHORTLY.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MONTAGUE...MILFORD...HAINESVILLE AND HIGH POINT. 

ADDITIONAL RAINFALL AMOUNTS OF UP TO ONE INCH ARE POSSIBLE IN THE 
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4115 7490 4128 7484 4131 7479 4132 7480
      4132 7479 4133 7476 4135 7475 4136 7469
      4134 7465 4130 7465 4116 7475

$$

JRK
222 
WGUS71 KPHI 270436
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1236 AM EDT MON JUL 27 2015

NJC037-270445-
/O.EXP.KPHI.FF.W.0041.000000T0000Z-150727T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX NJ-
1236 AM EDT MON JUL 27 2015

...THE FLASH FLOOD WARNING FOR NORTHWESTERN SUSSEX COUNTY WILL EXPIRE
AT 1245 AM EDT...

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

LAT...LON 4115 7490 4128 7484 4131 7479 4132 7480
      4132 7479 4133 7476 4135 7475 4136 7469
      4134 7465 4130 7465 4116 7475

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 8:00 PM EDTSpecial Weather StatementPHISussex30 min
Jul 26, 8:10 PM EDTAreal Flood AdvisoryPHISussex4 hr
Jul 26, 10:02 PM EDTFlash Flood WarningPHISussex, Warren7 hr
Jul 26, 10:43 PM EDTSpecial Weather StatementPHIMorris, Warren92 min
Jul 26, 11:05 PM EDTAreal Flood AdvisoryPHIWarren4 hr
Jul 27, 12:54 AM EDTAreal Flood AdvisoryPHIHunterdon3 hr
Jul 27, 3:19 AM EDTAreal Flood AdvisoryPHICamden, Cumberland, Gloucester, Salem3 hr
Jul 27, 5:20 PM EDTAreal Flood AdvisoryPHIMiddlesex, Somerset4 hr
Jul 27, 7:13 PM EDTAreal Flood AdvisoryPHIMercer4 hr

Nearby

Flash Flood Warnings in New Jersey, 2015Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.