Alert archive / New Jersey / Flash Flood Warnings in 2016

Flash Flood Warning 4, NWS Philadelphia/Mount Holly

February 24, 20167 counties in New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Feb 24, 2016, 10:32 PM EST for 7 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 4 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: Feb 24, 2016, 10:32 PM EST (03:32 UTC)
Expired: Feb 25, 2016, 2:30 AM EST
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Burlington County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 98 km from the middle of the area, began a volume at 03:33 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
Feb 24, 11:30 PM EST	FLASH FLOOD	Reaville, NJ	NESHANIC CREEK ROSE ABOVE FLOOD STAGE. THE WATER LEVEL ROSE OVER A FOOT IN ONE HOUR

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, 3.5 hours before the alert went out and 135 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: 38 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 479 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 529 m²/s²
0-3 km storm-relative helicity: 504 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

387 
WGUS51 KPHI 250332
FFWPHI
NJC005-019-021-023-027-035-037-PAC017-250730-
/O.NEW.KPHI.FF.W.0004.160225T0332Z-160225T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1032 PM EST WED FEB 24 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY...
  EASTERN HUNTERDON COUNTY IN NORTHWESTERN NEW JERSEY...
  SOUTHEASTERN SUSSEX COUNTY IN NORTHWESTERN NEW JERSEY...
  SOMERSET COUNTY IN NORTHERN NEW JERSEY...
  MORRIS COUNTY IN NORTHERN NEW JERSEY...
  WESTERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
  NORTH CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  EAST CENTRAL BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA...

* UNTIL 230 AM EST
    
* AT 1030 PM EST...A LINE OF THUNDERSTORMS WERE MOVING OVER THE SAME
  AREA. DOPPLER RADAR INDICATED BETWEEN 1.00 AND 1.50 INCHES OF RAIN
  WAS FALLING. THIS IS IN ADDITION TO THE HEAVY RAIN SOME AREAS
  RECEIVED EARLIER. DUE TO SATURATED SOILS, EXCESSIVE RUNOFF WILL
  OCCUR, AND QUICKLY. FLASH FLOODING IS EXPECTED ACROSS PORTIONS OF
  THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. 

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

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4113 7445 4109 7450 4104 7450 4105 7445
      4102 7443 4100 7430 4090 7427 4091 7433
      4076 7438 4075 7436 4067 7446 4065 7441
      4060 7446 4060 7432 4007 7467 4029 7513
      4116 7452

$$
KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 24, 7:10 PM EST	Flash Flood Warning	PHI	Mercer, Middlesex, Monmouth, Somerset	3 hr
Feb 24, 8:42 PM EST	Areal Flood Advisory	PHI	Hunterdon, Mercer, Morris, Sussex, Warren	4 hr
Feb 24, 8:47 PM EST	Severe Thunderstorm Warning	PHI	Gloucester, Salem	43 min
Feb 24, 8:48 PM EST	Areal Flood Advisory	PHI	Cumberland, Gloucester, Salem	4 hr
Feb 24, 9:02 PM EST	Special Marine Warning	PHI		58 min
Feb 24, 9:18 PM EST	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 4 more	4 hr
Feb 24, 9:24 PM EST	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 3 more	4 hr
Feb 24, 9:40 PM EST	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	35 min
Feb 24, 9:55 PM EST	Flash Flood Warning	PHI	Warren	4 hr
Feb 24, 10:05 PM EST	Flash Flood Warning	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	4 hr
Feb 24, 10:06 PM EST	Special Weather Statement	PHI	Sussex	39 min
Feb 24, 10:19 PM EST	Special Marine Warning	PHI		56 min
Feb 24, 10:26 PM EST	Special Weather Statement	PHI	Sussex	34 min
Feb 24, 10:36 PM EST	Special Weather Statement	PHI	Atlantic, Ocean	39 min
Feb 24, 10:49 PM EST	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Monmouth, Ocean	4 hr
Feb 24, 10:51 PM EST	Special Weather Statement	PHI	Mercer, Middlesex, Morris, Somerset	54 min
Feb 24, 11:03 PM EST	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 1 more	42 min
Feb 24, 11:11 PM EST	Special Weather Statement	PHI	Monmouth, Ocean	64 min
Feb 24, 11:22 PM EST	Special Marine Warning	PHI		53 min
Feb 24, 11:25 PM EST	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	15 min
Feb 25, 12:04 AM EST	Special Weather Statement	PHI	Atlantic, Monmouth, Ocean	56 min
Feb 25, 1:55 AM EST	Areal Flood Warning	PHI	Warren	6 hr
Feb 25, 2:04 AM EST	Areal Flood Warning	PHI	Burlington, Camden, Gloucester	4 hr
Feb 25, 2:22 AM EST	Areal Flood Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Morris, Somerset and 1 more	8 hr
Feb 25, 2:26 AM EST	River Flood Warning	PHI	Somerset	33 hr
Feb 25, 2:31 AM EST	River Flood Warning	PHI	Morris, Passaic	31 hr
Feb 25, 7:51 AM EST	Areal Flood Warning	PHI	Warren	6 hr
Feb 25, 10:02 AM EST	River Flood Warning	PHI	Morris	25 hr
Feb 25, 10:13 AM EST	Areal Flood Warning	PHI	Somerset	6 hr
Feb 25, 12:37 PM EST	Areal Flood Warning	PHI	Sussex, Warren	8 hr
Feb 25, 3:28 PM EST	Areal Flood Warning	PHI	Somerset	14 hr
Feb 24, 7:12 PM EST	Severe Thunderstorm Warning	PHI	Chester, Delaware	33 min
Feb 24, 7:21 PM EST	Areal Flood Advisory	PHI	Chester	4 hr
Feb 24, 7:35 PM EST	Areal Flood Advisory	PHI	Carbon, Monroe	6 hr
Feb 24, 7:39 PM EST	Severe Thunderstorm Warning	PHI	Berks, Chester	36 min
Feb 24, 8:13 PM EST	Special Weather Statement	PHI	Chester, Montgomery	62 min
Feb 24, 8:23 PM EST	Special Weather Statement	PHI	Lehigh, Monroe, Northampton	67 min
Feb 24, 9:44 PM EST	Areal Flood Warning	PHI	Berks, Chester, Montgomery	10 hr
Feb 24, 10:11 PM EST	River Flood Warning	PHI	Chester	20 hr
Feb 25, 12:19 AM EST	River Flood Warning	PHI	Montgomery	14 hr
Feb 25, 12:28 AM EST	River Flood Warning	PHI	Chester, Delaware	18 hr
Feb 25, 12:37 AM EST	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	28 hr
Feb 25, 2:07 AM EST	River Flood Warning	PHI	Berks, Montgomery	8 hr
Feb 25, 7:41 AM EST	Areal Flood Warning	PHI	Berks, Chester, Montgomery	6 hr

Nearby

Flash Flood Warnings in New Jersey, 2016 Flash Flood Warnings in Pennsylvania, 2016 Every flash flood warning in 2016

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.