Alert archive / New Jersey / Flash Flood Warnings in 2012

Flash Flood Warning 24, NWS Philadelphia/Mount Holly

August 1, 2012Hunterdon County, Morris County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 1, 2012, 3:51 PM EDT for Hunterdon County, Morris County, New Jersey. It was in force for 2 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: Aug 1, 2012, 3:51 PM EDT (19:51 UTC)
Expired: Aug 1, 2012, 6:18 PM EDT
In force: 2 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Hunterdon County, NJ, Morris County, NJ

The radar

The Philadelphia radar (KDIX), 88 km from the middle of the area, began a volume at 19:53 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
Aug 1, 4:30 PM EDT	FLASH FLOOD	Readington Twp, NJ	ROAD FLOODED

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, 7.9 hours before the alert went out and 166 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: 140 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 893 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 85 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.

233 
WGUS51 KPHI 011951
FFWPHI
NJC019-027-012345-
/O.NEW.KPHI.FF.W.0024.120801T1951Z-120801T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
351 PM EDT WED AUG 1 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN HUNTERDON COUNTY...
  SOUTHWESTERN MORRIS COUNTY...

* UNTIL 745 PM EDT...

* AT 348 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER NORTHEASTERN HUNTERDON AND
  SOUTHWESTERN MORRIS COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RURAL AREAS
  OF NORTHEASTERN HUNTERDON AND SOUTHWESTERN MORRIS COUNTIES.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4072 7472 4064 7473 4062 7471 4060 7472
      4058 7472 4047 7488 4065 7508 4069 7502
      4071 7497 4075 7494 4084 7480 4074 7465

$$

MEOLA

2 follow-up statements

964 
WGUS71 KPHI 012100
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
500 PM EDT WED AUG 1 2012

NJC019-027-012345-
/O.CON.KPHI.FF.W.0024.000000T0000Z-120801T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HUNTERDON NJ-MORRIS NJ-
500 PM EDT WED AUG 1 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR
SOUTHWESTERN MORRIS AND NORTHEASTERN HUNTERDON COUNTIES...

AT 457 PM EDT...DOPPLER RADAR ESTIMATES CONTINUE TO INDICATE A
THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER NORTHEASTERN HUNTERDON 
AND SOUTHWESTERN MORRIS COUNTIES. RADAR ESTIMATES INDICATE THAT UP 
TO FIVE AND A HALF INCHES OF RAIN HAS FALLEN.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RURAL AREAS
OF NORTHEASTERN HUNTERDON AND SOUTHWESTERN MORRIS COUNTIES.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE BY CALLING YOUR LOCAL
LAW ENFORCEMENT OFFICIALS OR BY CALLING THE NATIONAL WEATHER SERVICE
TOLL FREE AT...1-877-633-6772.

&&

LAT...LON 4072 7472 4064 7473 4062 7471 4060 7472
      4058 7472 4047 7488 4065 7508 4069 7502
      4071 7497 4075 7494 4084 7480 4074 7465

$$

MEOLA

438 
WGUS71 KPHI 012218
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
618 PM EDT WED AUG 1 2012

NJC019-027-012228-
/O.CAN.KPHI.FF.W.0024.000000T0000Z-120801T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HUNTERDON NJ-MORRIS NJ-
618 PM EDT WED AUG 1 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHWESTERN MORRIS
AND NORTHEASTERN HUNTERDON COUNTIES...

THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND FLOOD WATERS
NO LONGER POSE A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH
FLOOD WARNING HAS BEEN CANCELLED.

LAT...LON 4072 7472 4064 7473 4062 7471 4060 7472
      4058 7472 4047 7488 4065 7508 4069 7502
      4071 7497 4075 7494 4084 7480 4074 7465

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 9:51 PM EDT	Coastal Flood Statement	PHI	Burlington, Camden, Gloucester	5 hr
Aug 1, 9:24 AM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more	15 hr
Aug 1, 9:44 AM EDT	Areal Flood Advisory	PHI	Cumberland	2 hr
Aug 1, 10:48 AM EDT	Special Weather Statement	PHI	Cumberland	57 min
Aug 1, 10:59 AM EDT	Areal Flood Advisory	PHI	Cumberland	73 min
Aug 1, 12:09 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	3 hr
Aug 1, 12:48 PM EDT	Areal Flood Advisory	PHI	Cape May	107 min
Aug 1, 1:09 PM EDT	Special Weather Statement	PHI	Cape May	66 min
Aug 1, 1:16 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Ocean	3 hr
Aug 1, 1:45 PM EDT	Special Weather Statement	PHI	Somerset	60 min
Aug 1, 2:12 PM EDT	Areal Flood Advisory	PHI	Middlesex, Morris, Somerset	3 hr
Aug 1, 2:27 PM EDT	Special Weather Statement	PHI	Hunterdon, Mercer	63 min
Aug 1, 2:39 PM EDT	Flash Flood Warning	PHI	Middlesex, Somerset	3 hr
Aug 1, 2:47 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer	3 hr
Aug 1, 2:57 PM EDT	Special Weather Statement	PHI	Ocean	63 min
Aug 1, 3:12 PM EDT	Special Weather Statement	PHI	Hunterdon	63 min
Aug 1, 3:25 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	3 hr
Aug 1, 3:31 PM EDT	Coastal Flood Statement	PHI	Burlington, Camden, Gloucester, Salem	11 hr
Aug 1, 4:11 PM EDT	Areal Flood Advisory	PHI	Burlington, Ocean	65 min
Aug 1, 4:41 PM EDT	Special Weather Statement	PHI	Sussex	64 min
Aug 1, 5:26 PM EDT	Areal Flood Advisory	PHI	Sussex	102 min
Aug 1, 5:41 PM EDT	Special Weather Statement	PHI	Camden, Gloucester	64 min
Aug 1, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	31 min
Aug 1, 6:16 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	46 min

Nearby

Flash Flood Warnings in New Jersey, 2012 Every flash flood warning in 2012

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.