Alert archive / New Jersey / Flash Flood Warnings in 2013

Flash Flood Warning 57, NWS Philadelphia/Mount Holly

August 13, 2013Hunterdon County, Mercer County, New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 13, 2013, 8:20 AM EDT for Hunterdon County, Mercer County, New Jersey; Bucks County, Pennsylvania. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 13, 2013, 8:20 AM EDT (12:20 UTC)
Expired: Aug 13, 2013, 4:15 PM EDT
In force: 8 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Hunterdon County, NJ, Mercer County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 42 km from the middle of the area, began a volume at 12:22 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 0.3 hours before the alert went out and 143 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: 1840 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 567 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 7.8

Open this sounding in Storm Lab

The text

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

300 
WGUS51 KPHI 131220
FFWPHI
NJC019-021-PAC017-131615-
/O.NEW.KPHI.FF.W.0057.130813T1220Z-130813T1615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
820 AM EDT TUE AUG 13 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN HUNTERDON COUNTY...
  MERCER COUNTY...
  SOUTHERN BUCKS COUNTY...

* UNTIL 1215 PM EDT...

* AT 815 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN MOVING INTO THE AREA FROM THE SOUTHWEST. RAINFALL
  AMOUNTS OF TWO TO FOUR INCHES ARE POSSIBLE IN A SHORT AMOUNT OF
  TIME.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TRENTON...
  PRINCETON...DOYLESTOWN...NEWTOWN AND LAMBERTVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. NEVER ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR IN AN
AUTOMOBILE. TURN AROUND DON'T DROWN!

&&

LAT...LON 4018 7461 4014 7459 4018 7471 4013 7474
      4013 7482 4008 7487 4005 7497 4011 7496
      4035 7536 4050 7479 4038 7472 4039 7463
      4033 7462 4028 7449 4024 7448

$$

IOVINO

1 follow-up statement

300 
WGUS51 KPHI 131606
FFWPHI
NJC019-021-PAC017-132015-
/O.EXT.KPHI.FF.W.0057.000000T0000Z-130813T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1206 PM EDT TUE AUG 13 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  SOUTHERN HUNTERDON COUNTY...
  MERCER COUNTY...
  SOUTHERN BUCKS COUNTY...

* UNTIL 415 PM EDT...

* AT NOON EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED     
  THAT HEAVY RAIN HAS MOVED OUT OF THE AREA. HOWEVER...SOME SMALL    
  STREAMS REMAIN OUT OF THEIR BANKS. THE FLASH FLOOD WARNING HAS     
  THEREFORE BEEN EXTENDED INTO THE LATE AFTERNOON HOURS TO GIVE TIME 
  FOR THE WATER TO DRAIN. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO 
CROSS WATER COVERED BRIDGES...DIPS...OR LOW WATER CROSSINGS. TURN 
AROUND...DON'T DROWN! NEVER TRY TO CROSS A FLOWING STREAM...EVEN A 
SMALL ONE...ON FOOT. NEVER...EVER...SWIM OR BOAT IN FLOODED STREAMS.

&&

LAT...LON 4018 7461 4014 7459 4018 7471 4013 7474
      4013 7482 4008 7487 4005 7497 4011 7496
      4035 7536 4050 7479 4038 7472 4039 7463
      4033 7462 4028 7449 4024 7448

$$

FORECASTER:JJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 2:45 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 6 more	9 hr
Aug 13, 6:23 AM EDT	Severe Thunderstorm Warning	PHI	Salem	67 min
Aug 13, 7:05 AM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	40 min
Aug 13, 7:11 AM EDT	Special Marine Warning	PHI		19 min
Aug 13, 7:16 AM EDT	Special Weather Statement	PHI	Camden, Gloucester, Salem	59 min
Aug 13, 7:22 AM EDT	Areal Flood Advisory	PHI	Camden, Gloucester, Salem	7 hr
Aug 13, 7:33 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Warren	7 hr
Aug 13, 7:51 AM EDT	Special Marine Warning	PHI		24 min
Aug 13, 7:54 AM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester, Salem	8 hr
Aug 13, 7:54 AM EDT	Special Weather Statement	PHI	Camden	66 min
Aug 13, 7:57 AM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	48 min
Aug 13, 8:36 AM EDT	Special Weather Statement	PHI	Mercer	39 min
Aug 13, 8:44 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Salem	61 min
Aug 13, 8:59 AM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Camden, Gloucester	7 hr
Aug 13, 9:07 AM EDT	Special Weather Statement	PHI	Cumberland, Salem	38 min
Aug 13, 9:11 AM EDT	Special Weather Statement	PHI	Burlington	49 min
Aug 13, 9:22 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	38 min
Aug 13, 9:26 AM EDT	Special Weather Statement	PHI	Atlantic	34 min
Aug 13, 9:34 AM EDT	Special Marine Warning	PHI		56 min
Aug 13, 9:42 AM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Hunterdon, Middlesex and 4 more	5 hr
Aug 13, 9:43 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	47 min
Aug 13, 9:49 AM EDT	Special Weather Statement	PHI	Atlantic, Cumberland	56 min
Aug 13, 10:01 AM EDT	Special Weather Statement	PHI	Monmouth	29 min
Aug 13, 10:04 AM EDT	Special Weather Statement	PHI	Ocean	41 min
Aug 13, 10:12 AM EDT	Tornado Warning	PHI	Ocean	33 min
Aug 13, 10:32 AM EDT	Severe Thunderstorm Warning	PHI	Ocean	28 min
Aug 13, 10:39 AM EDT	Special Marine Warning	PHI		66 min
Aug 13, 10:51 AM EDT	Special Weather Statement	PHI	Atlantic	54 min
Aug 13, 11:51 AM EDT	Special Marine Warning	PHI		84 min
Aug 13, 1:10 PM EDT	Special Marine Warning	PHI		65 min
Aug 13, 2:18 PM EDT	Areal Flood Warning	PHI	Burlington, Camden, Gloucester, Salem	9 hr
Aug 13, 3:30 PM EDT	Small Craft Advisory	PHI		24 hr
Aug 13, 5:15 AM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	4 hr
Aug 13, 5:47 AM EDT	Flash Flood Warning	PHI	Chester	4 hr
Aug 13, 6:07 AM EDT	Areal Flood Advisory	PHI	Bucks, Lehigh, Northampton	7 hr
Aug 13, 6:07 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	53 min
Aug 13, 6:20 AM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Philadelphia	4 hr
Aug 13, 6:32 AM EDT	Tornado Warning	PHI	Chester	43 min
Aug 13, 6:36 AM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery	8 hr
Aug 13, 7:14 AM EDT	Flash Flood Warning	PHI	Berks	4 hr
Aug 13, 7:42 AM EDT	Special Weather Statement	PHI	Philadelphia	48 min
Aug 13, 8:07 AM EDT	River Flood Warning	PHI	Chester	9 hr
Aug 13, 9:50 AM EDT	Flash Flood Warning	PHI	Chester	4 hr
Aug 13, 11:22 AM EDT	River Flood Warning	PHI	Chester, Delaware	16 hr

Nearby

Flash Flood Warnings in New Jersey, 2013 Flash Flood Warnings in Pennsylvania, 2013 Every flash flood warning in 2013

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.