Alert archive / New Jersey / Flash Flood Warnings in 2011

Flash Flood Warning 8, NWS Philadelphia/Mount Holly

July 8, 20115 counties in New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 8, 2011, 4:10 PM EDT for 5 counties in New Jersey. It was in force for 3 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 8, 2011, 4:10 PM EDT (20:10 UTC)
Expired: Jul 8, 2011, 6:56 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ

The radar

The Philadelphia radar (KDIX), 106 km from the middle of the area, began a volume at 20:14 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 8, 5:00 PM EDT	FLASH FLOOD	Morristown, NJ	I-287 CLOSED IN MORRIS COUNTY DUE TO FLOODING.

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, 8.2 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-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: 745 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 849 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

314 
WGUS51 KPHI 082010
FFWPHI
NJC019-027-035-037-041-090015-
/O.NEW.KPHI.FF.W.0008.110708T2010Z-110709T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
410 PM EDT FRI JUL 8 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MORRIS COUNTY IN NORTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF MORRISTOWN...
  NORTHERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...
  NORTHERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
  SOUTHERN SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
  THIS INCLUDES THE CITY OF NEWTON...
  WARREN COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 815 PM EDT

* AT 405 PM EDT...THUNDERSTORMS WITH TORRENTIAL DOWNPOURS
  ARE MOVING INTO NORTHERN NEW JERSEY. RAINFALL AMOUNTS OF
  1 TO 2 INCHES PER HOUR ARE LIKELY IN STRONGER STORMS. THIS
  AREA HAS RECENTLY BEEN WET AND IS MORE SUSCEPTIBLE TO STREAM
  AS WELL AS POOR DRAINAGE FLOODING.
 
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PARSIPPANY...HOPE...GREEN POND...FLATBROOKVILLE...FIVE POINTS...
  COLUMBIA...WHARTON...STANHOPE...ROCKAWAY...RIVERDALE...PEQUANNOCK
  TOWNSHIP...OGDENSBURG...NETCONG...MOUNTAIN LAKES...MOUNT
  ARLINGTON...LINCOLN PARK...LAKE TELEMARK...LAKE MOHAWK...
  KINNELON...HOPATCONG...GREAT MEADOWS-VIENNA...DOVER...CRANDON
  LAKES...BUTLER...BUDD LAKE...BOONTON...BLAIRSTOWN...ANDOVER AND
  ALLAMUCHY-PANTHER VALLEY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER
GROUND.

&&

LAT...LON 4089 7433 4086 7431 4074 7436 4067 7445
      4066 7440 4061 7443 4057 7519 4076 7519
      4079 7510 4084 7510 4086 7505 4099 7514
      4107 7497 4111 7498 4113 7467 4107 7449
      4104 7449 4105 7444 4097 7427 4089 7427

$$

TFG

1 follow-up statement

299 
WGUS71 KPHI 082256
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
656 PM EDT FRI JUL 8 2011

NJC019-027-035-037-041-082306-
/O.CAN.KPHI.FF.W.0008.000000T0000Z-110709T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX NJ-WARREN NJ-MORRIS NJ-HUNTERDON NJ-SOMERSET NJ-
656 PM EDT FRI JUL 8 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHERN
SOMERSET...NORTHERN HUNTERDON...MORRIS...WARREN AND SOUTHERN SUSSEX
COUNTIES...

NO ONGOING FLOODING IS BEING REPORTED IN THE AREA.

LAT...LON 4089 7433 4086 7431 4074 7436 4067 7445
      4066 7440 4061 7443 4057 7519 4076 7519
      4079 7510 4084 7510 4086 7505 4099 7514
      4107 7497 4111 7498 4113 7467 4107 7449
      4104 7449 4105 7444 4097 7427 4089 7427

$$
 
TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 8:40 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	80 min
Jul 7, 8:42 PM EDT	Special Marine Warning	PHI		2 hr
Jul 7, 10:07 PM EDT	Special Weather Statement	PHI	Cape May	53 min
Jul 7, 10:55 PM EDT	Severe Thunderstorm Warning	PHI	Warren	28 min
Jul 8, 3:58 AM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	19 hr
Jul 8, 4:34 AM EDT	Special Weather Statement	PHI	Hunterdon	56 min
Jul 8, 12:03 PM EDT	Special Weather Statement	PHI	Atlantic	57 min
Jul 8, 12:56 PM EDT	Special Weather Statement	PHI	Atlantic, Camden, Gloucester	64 min
Jul 8, 2:12 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	93 min
Jul 8, 2:23 PM EDT	Special Weather Statement	PHI	Warren	82 min
Jul 8, 2:25 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	7 hr
Jul 8, 2:51 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Warren	54 min
Jul 8, 2:56 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer	3 hr
Jul 8, 3:03 PM EDT	Special Weather Statement	PHI	Mercer	57 min
Jul 8, 3:14 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	66 min
Jul 8, 3:33 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Somerset	3 hr
Jul 8, 3:44 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	76 min
Jul 8, 3:48 PM EDT	Flash Flood Warning	PHI	Camden	3 hr
Jul 8, 3:51 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	69 min
Jul 8, 4:42 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	78 min
Jul 8, 4:50 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden	70 min
Jul 8, 5:03 PM EDT	Flash Flood Warning	PHI	Sussex	117 min
Jul 8, 5:03 PM EDT	Tornado Warning	PHI	Atlantic, Burlington, Camden	27 min
Jul 8, 5:33 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 4 more	3 hr
Jul 8, 5:44 PM EDT	Flash Flood Warning	PHI	Camden, Gloucester, Salem	3 hr
Jul 8, 6:32 PM EDT	Special Marine Warning	PHI		58 min
Jul 8, 7:13 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	77 min
Jul 8, 7:24 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean	3 hr
Jul 8, 7:26 PM EDT	Special Marine Warning	PHI		64 min
Jul 8, 7:50 PM EDT	Special Marine Warning	PHI		55 min

Nearby

Flash Flood Warnings in New Jersey, 2011 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.