Alert archive / New Jersey / Flash Flood Warnings in 2011

Flash Flood Warning 27, NWS Philadelphia/Mount Holly

August 14, 20114 states

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 14, 2011, 7:43 AM EDT for 4 states. 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: Aug 14, 2011, 7:43 AM EDT (11:43 UTC)
Expired: Aug 14, 2011, 11:45 AM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Kent County, DE, New Castle County, DE, Kent County, MD, Queen Anne's County, MD, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Salem County, NJ, Somerset County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 54 km from the middle of the area, began a volume at 11:45 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 14, 11:45 AM EDT	FLASH FLOOD	Millington, MD	ROAD FLOODED AT THE INTERSECTION OF 290 N AND 291.

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, 11.7 hours before the alert went out and 212 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: 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.

431 
WGUS51 KPHI 141143
FFWPHI
DEC001-003-MDC029-035-NJC005-007-011-015-019-021-023-027-033-035-
PAC017-045-091-101-141545-
/O.NEW.KPHI.FF.W.0027.110814T1143Z-110814T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN KENT COUNTY...
  NORTHEASTERN KENT COUNTY...
  MORRIS COUNTY...
  HUNTERDON COUNTY...
  SOMERSET COUNTY...
  SALEM COUNTY...
  WESTERN CUMBERLAND COUNTY...
  CAMDEN COUNTY...
  GLOUCESTER COUNTY...
  MERCER COUNTY...
  MIDDLESEX COUNTY...
  DELAWARE COUNTY...
  PHILADELPHIA COUNTY...
  SOUTHEASTERN MONTGOMERY COUNTY...
  SOUTHEASTERN BUCKS COUNTY...
  NORTHEASTERN QUEEN ANNE'S COUNTY...
  NEW CASTLE COUNTY...
  NORTHWESTERN BURLINGTON COUNTY...

* UNTIL 1145 AM EDT...

* AT 736 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  AN AREA OF VERY HEAVY RAIN FROM SHOWERS AND THUNDERSTORMS MOVING    
  SLOWLY NORTHEAST OVER THE REGION.  SOME VERY HEAVY RAIN EMBEDDED   
  IN THIS AREA IS CAPABLE OF DUMPING ANOTHER 1 TO 2 INCHES OF RAIN.  
  ADDITIONAL FLOODING OF ROADWAYS...LOW LYING AREAS AND SMALL        
  STREAMS CAN BE EXPECTED WHEREVER THE HEAVIEST RAIN HAPPENS TO FALL.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MIDDLETOWN...NEWARK...WILMINGTON...CAMDEN...MORRISTOWN...NEW
  BRUNSWICK...PERTH AMBOY...SOMERVILLE...TRENTON AND PHILADELPHIA.

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 4021 7459 4000 7455 3925 7520 3946 7555
      3958 7556 3946 7558 3922 7539 3914 7581
      3903 7593 3937 7587 3939 7577 3976 7576
      3999 7545 4101 7448 4086 7431 4067 7445
      4059 7444 4060 7423 4047 7427 4045 7422

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 12:37 AM EDT	Areal Flood Advisory	PHI	Cecil	3 hr
Aug 14, 1:12 AM EDT	Flash Flood Warning	PHI	Cecil	4 hr
Aug 14, 1:51 AM EDT	Areal Flood Advisory	PHI	Caroline, Kent, Queen Anne's, Talbot	6 hr
Aug 14, 2:27 AM EDT	Flash Flood Warning	PHI	Caroline, Kent, Queen Anne's	4 hr
Aug 14, 3:42 AM EDT	Flash Flood Watch	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	25 hr
Aug 14, 5:03 AM EDT	Flash Flood Warning	PHI	Cecil, Kent, Queen Anne's	4 hr
Aug 14, 8:41 AM EDT	Flash Flood Warning	PHI	Cecil, Kent, Queen Anne's	4 hr
Aug 14, 12:16 PM EDT	Areal Flood Warning	PHI	Cecil, Kent	4 hr
Aug 13, 9:39 PM EDT	Areal Flood Advisory	PHI	Carbon, Lehigh, Monroe, Northampton	4 hr
Aug 13, 9:56 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh, Northampton	4 hr
Aug 13, 11:33 PM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Aug 14, 3:55 AM EDT	Flash Flood Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	4 hr
Aug 14, 4:45 AM EDT	Special Weather Statement	PHI	Philadelphia	60 min
Aug 14, 6:24 AM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Aug 14, 9:21 AM EDT	Areal Flood Warning	PHI	Northampton	3 hr
Aug 14, 12:37 PM EDT	Areal Flood Warning	PHI	Bucks, Lehigh, Northampton	7 hr
Aug 14, 1:00 PM EDT	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	8 hr
Aug 13, 10:21 PM EDT	Flash Flood Warning	PHI	Warren	4 hr
Aug 13, 11:16 PM EDT	Flash Flood Warning	PHI	Sussex	4 hr
Aug 14, 12:03 AM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Somerset	4 hr
Aug 14, 12:53 AM EDT	Areal Flood Advisory	PHI	Middlesex, Somerset	3 hr
Aug 14, 2:15 AM EDT	Flash Flood Warning	PHI	Warren	4 hr
Aug 14, 3:25 AM EDT	Small Craft Advisory	PHI		30 hr
Aug 14, 3:37 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	113 min
Aug 14, 5:37 AM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	4 hr
Aug 14, 8:57 AM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Monmouth, Ocean	4 hr
Aug 14, 11:40 AM EDT	Areal Flood Warning	PHI	Camden, Cumberland, Gloucester, Salem	18 hr
Aug 14, 11:50 AM EDT	Special Marine Warning	PHI		40 min
Aug 14, 12:00 PM EDT	Areal Flood Warning	PHI	Morris	28 hr
Aug 14, 12:25 PM EDT	Special Marine Warning	PHI		35 min
Aug 14, 12:28 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	62 min
Aug 14, 1:24 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester, Salem	66 min
Aug 14, 1:36 PM EDT	Areal Flood Warning	PHI	Mercer, Middlesex, Morris, Somerset	16 hr
Aug 14, 2:21 PM EDT	Areal Flood Warning	PHI	Burlington	6 hr
Aug 14, 2:23 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	52 min
Aug 14, 4:03 PM EDT	Special Weather Statement	PHI	Ocean	57 min
Aug 14, 4:04 PM EDT	River Flood Warning	PHI	Mercer	9 hr
Aug 14, 6:39 AM EDT	River Flood Warning	PHI	New Castle	13 hr
Aug 14, 6:45 AM EDT	Areal Flood Advisory	PHI	Kent, New Castle	4 hr
Aug 14, 11:47 AM EDT	Severe Thunderstorm Warning	PHI	Kent	28 min
Aug 14, 2:56 PM EDT	River Flood Warning	PHI	New Castle	3 hr

Nearby

Flash Flood Warnings in New Jersey, 2011 Flash Flood Warnings in Pennsylvania, 2011 Flash Flood Warnings in Maryland, 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.