Alert archive / New Jersey / Flash Flood Warnings in 2011

Flash Flood Warning 21, NWS Philadelphia/Mount Holly

August 14, 2011Hunterdon County, Morris County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 14, 2011, 12:03 AM EDT for Hunterdon County, Morris County, Somerset 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 14, 2011, 12:03 AM EDT (04:03 UTC)
Expired
Aug 14, 2011, 4:00 AM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 97 km from the middle of the area, began a volume at 04:03 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, 4.1 hours before the alert went out and 151 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 2011-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL1000850700500300200100-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2011-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

021 
WGUS51 KPHI 140403
FFWPHI
NJC019-027-035-140800-
/O.NEW.KPHI.FF.W.0021.110814T0403Z-110814T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1203 AM EDT SUN AUG 14 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MORRIS COUNTY...
  HUNTERDON COUNTY...
  NORTHERN SOMERSET COUNTY...

* UNTIL 400 AM EDT...

* AT 1200 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR            
  ESTIMATED UP TO ONE INCH OF RAIN HAS FALLEN OVER                   
  PORTIONS OF HUNTERDON...MORRIS AND NORTHERN SOMERSET COUNTIES      
  DURING THE PAST FEW HOURS. WITH ADDITIONAL RAIN ON THE WAY...FLASH 
  FLOODING IS EXPECTED. ROADWAY FLOODING CAN BE EXPECTED...AND       
  SMALL STREAMS AND DITCHES IN THE VICINITY OF HEAVY RAIN COULD       
  EXCEED THEIR BANKS.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOU CAR THROUGH FLOODED ROADWAYS...THE WATER MAY BE 
DEEPER THAN YOU THINK.

PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE...1-877-633-6772.

&&

LAT...LON 4089 7433 4086 7431 4082 7433 4063 7452
      4037 7493 4048 7507 4053 7507 4056 7511
      4056 7517 4059 7519 4080 7485 4090 7478
      4091 7466 4096 7464 4108 7451 4104 7449
      4105 7444 4101 7439 4100 7430 4089 7427

$$

FORECASTER:JJM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 9:39 PM EDTAreal Flood AdvisoryPHISussex, Warren4 hr
Aug 13, 10:21 PM EDTFlash Flood WarningPHIWarren4 hr
Aug 13, 11:16 PM EDTFlash Flood WarningPHISussex4 hr
Aug 13, 11:33 PM EDTAreal Flood AdvisoryPHIHunterdon, Morris4 hr
Aug 14, 12:53 AM EDTAreal Flood AdvisoryPHIMiddlesex, Somerset3 hr
Aug 14, 2:15 AM EDTFlash Flood WarningPHIWarren4 hr
Aug 14, 3:25 AM EDTSmall Craft AdvisoryPHI30 hr
Aug 14, 3:37 AM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Salem113 min
Aug 14, 3:42 AM EDTFlash Flood WatchPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more25 hr
Aug 14, 3:55 AM EDTFlash Flood WarningPHIBurlington, Camden, Cumberland, Gloucester, Hunterdon, Mercer and 4 more4 hr
Aug 14, 4:45 AM EDTSpecial Weather StatementPHICamden, Mercer60 min
Aug 14, 5:37 AM EDTAreal Flood AdvisoryPHIBurlington, Mercer, Middlesex, Monmouth, Ocean4 hr
Aug 14, 6:24 AM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Sussex, Warren3 hr
Aug 14, 7:43 AM EDTFlash Flood WarningPHIBurlington, Camden, Cumberland, Gloucester, Hunterdon, Mercer and 4 more4 hr
Aug 14, 8:57 AM EDTFlash Flood WarningPHIAtlantic, Burlington, Monmouth, Ocean4 hr
Aug 14, 11:40 AM EDTAreal Flood WarningPHICamden, Cumberland, Gloucester, Salem18 hr
Aug 14, 11:50 AM EDTSpecial Marine WarningPHI40 min
Aug 14, 12:00 PM EDTAreal Flood WarningPHIMorris28 hr
Aug 14, 12:25 PM EDTSpecial Marine WarningPHI35 min
Aug 14, 12:28 PM EDTSevere Thunderstorm WarningPHICumberland, Salem62 min
Aug 14, 12:37 PM EDTAreal Flood WarningPHIHunterdon, Warren7 hr
Aug 14, 1:24 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cumberland, Gloucester, Salem66 min
Aug 14, 1:36 PM EDTAreal Flood WarningPHIMercer, Middlesex, Morris, Somerset16 hr
Aug 14, 2:21 PM EDTAreal Flood WarningPHIBurlington6 hr
Aug 14, 2:23 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester52 min
Aug 14, 4:03 PM EDTSpecial Weather StatementPHIOcean57 min
Aug 14, 4:04 PM EDTRiver Flood WarningPHIMercer9 hr

Nearby

Flash Flood Warnings in New Jersey, 2011Every flash flood warning in 2011

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.