Alert archive / New Jersey / Flash Flood Warnings in 2007

Flash Flood Warning 9, NWS Philadelphia/Mount Holly

April 27, 2007Hunterdon County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Apr 27, 2007, 8:08 AM EDT for Hunterdon County, Somerset County, New Jersey. It took effect at Apr 27, 2007, 8:15 AM EDT. It was in force for 90 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 27, 2007, 8:08 AM EDT (12:08 UTC)
In effect from
Apr 27, 2007, 8:15 AM EDT
Expired
Apr 27, 2007, 9:45 AM EDT
In force
90 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

Counties Hunterdon County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 75 km from the middle of the area, began a volume at 12:08 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, 0.1 hours before the alert went out and 164 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 12:00Z on 2007-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2007-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
429 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
217 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.

000 
WGUS51 KPHI 271215
FFWPHI
NJC019-035-271345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
808 AM EDT FRI APR 27 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL SOMERSET COUNTY IN NORTHERN NEW JERSEY...
  SOUTHERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 945 AM EDT

* AT 802 AM EDT...DOPPLER RADAR INDICATED THAT BETWEEN 2 AND 4       
  INCHES OF RAIN HAS ALREADY FALLEN IN A BAND FROM STOCKTON TO       
  EAST AMWELL IN HUNTERDON COUNTY AND BRANCHBURG TO WARREN IN        
  SOMERSET COUNTY. WITH MORE RAIN TO COME, THE FLASH FLOOD           
  WARNING HAS BEEN REISSUED.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WHITE HOUSE
  STATION...SOMERVILLE...MANVILLE AND FLEMINGTON

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. 

MOVE TO HIGHER GROUND IF NECESSARY.

LAT...LON 4039 7492 4051 7452 4068 7463 4052 7503

$$

KRUZDLO

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 2:14 AM EDTFlash Flood WarningPHIHunterdon, Somerset3 hr
Apr 27, 4:53 AM EDTFlash Flood WarningPHIHunterdon, Somerset3 hr

Nearby

Flash Flood Warnings in New Jersey, 2007Every flash flood warning in 2007

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.