Alert archive / New Jersey / Flash Flood Warnings in 2017

Flash Flood Warning 14, NWS Philadelphia/Mount Holly

July 14, 2017Gloucester County, Salem County, New Jersey; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 14, 2017, 3:34 PM EDT for Gloucester County, Salem County, New Jersey; New Castle County, Delaware. 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 14, 2017, 3:34 PM EDT (19:34 UTC)
Expired: Jul 14, 2017, 6:30 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties New Castle County, DE, Gloucester County, NJ, Salem County, NJ

The radar

The Philadelphia radar (KDIX), 91 km from the middle of the area, began a volume at 19:33 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
Jul 14, 6:15 PM EDT	HEAVY RAIN 2.65	3 N Alloway, NJ

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.6 hours before the alert went out and 188 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: 403 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1367 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

835 
WGUS51 KPHI 141934
FFWPHI
DEC003-NJC015-033-142230-
/O.NEW.KPHI.FF.W.0014.170714T1934Z-170714T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
334 PM EDT FRI JUL 14 2017

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Central New Castle County in northern Delaware...
  Salem County in southern New Jersey...
  Western Gloucester County in southern New Jersey...

* Until 630 PM EDT

* At 332 PM EDT...Doppler radar indicated thunderstorms producing 
  very heavy rain across portions of the warned area. Rainfall rates 
  up to 2 inches per hour have been reported. Expect flooding in the 
  areas of heaviest rainfall through the afternoon commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3967 7579 3968 7552 3981 7543 3980 7541
      3984 7536 3985 7531 3978 7519 3957 7506
      3954 7521 3956 7524 3953 7527 3950 7542
      3948 7578

$$

jjm

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 8:17 PM EDT	Special Weather Statement	PHI	Camden	43 min
Jul 13, 8:26 PM EDT	Special Weather Statement	PHI	Cape May	34 min
Jul 13, 8:27 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	4 hr
Jul 13, 8:49 PM EDT	Special Weather Statement	PHI	Cumberland	26 min
Jul 13, 8:51 PM EDT	Special Weather Statement	PHI	Atlantic	54 min
Jul 13, 9:07 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	53 min
Jul 13, 9:46 PM EDT	Special Weather Statement	PHI	Atlantic	14 min
Jul 13, 9:50 PM EDT	Special Marine Warning	PHI		115 min
Jul 13, 9:57 PM EDT	Special Weather Statement	PHI	Cape May	33 min
Jul 13, 10:42 PM EDT	Special Marine Warning	PHI		93 min
Jul 14, 7:21 AM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	3 hr
Jul 14, 11:40 AM EDT	Flash Flood Watch	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	11 hr
Jul 14, 2:57 PM EDT	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	3 hr
Jul 14, 3:07 PM EDT	Special Marine Warning	PHI		53 min
Jul 14, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	12 min
Jul 14, 3:23 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	67 min
Jul 14, 3:25 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Cumberland, Gloucester, Ocean, Salem	4 hr
Jul 14, 3:35 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester	55 min
Jul 14, 3:43 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Salem	47 min
Jul 14, 3:47 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Ocean	3 hr
Jul 14, 3:54 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	66 min
Jul 14, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May	63 min
Jul 14, 4:13 PM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	3 hr
Jul 14, 4:18 PM EDT	Special Marine Warning	PHI		57 min
Jul 14, 4:25 PM EDT	Special Marine Warning	PHI		95 min
Jul 14, 4:44 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	61 min
Jul 14, 4:54 PM EDT	Special Marine Warning	PHI		66 min
Jul 14, 5:47 PM EDT	Special Weather Statement	PHI	Cape May	13 min
Jul 14, 5:53 PM EDT	Special Marine Warning	PHI		52 min
Jul 14, 6:32 PM EDT	Special Marine Warning	PHI		88 min
Jul 14, 7:08 PM EDT	Special Marine Warning	PHI		97 min
Jul 14, 7:28 PM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	3 hr
Jul 13, 8:09 PM EDT	Special Weather Statement	PHI	Kent	36 min
Jul 13, 8:29 PM EDT	Special Weather Statement	PHI	Kent	31 min
Jul 13, 10:03 PM EDT	Special Weather Statement	PHI	Sussex	27 min
Jul 13, 10:15 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	4 hr
Jul 13, 10:39 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	51 min
Jul 14, 9:02 AM EDT	Special Weather Statement	PHI	New Castle	28 min
Jul 14, 12:06 PM EDT	Heat Advisory	PHI	Kent, Sussex	7 hr
Jul 14, 2:14 PM EDT	Areal Flood Advisory	PHI	New Castle	3 hr
Jul 14, 2:31 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	59 min
Jul 14, 2:53 PM EDT	Flash Flood Warning	PHI	New Castle	3 hr
Jul 14, 5:14 PM EDT	Areal Flood Advisory	PHI	Kent	3 hr
Jul 14, 5:24 PM EDT	Special Weather Statement	PHI	Sussex	36 min
Jul 14, 5:30 PM EDT	River Flood Warning	PHI	New Castle	7 hr
Jul 14, 5:40 PM EDT	Severe Thunderstorm Warning	PHI	Kent	65 min
Jul 14, 5:51 PM EDT	Special Weather Statement	PHI	Sussex	39 min
Jul 14, 6:10 PM EDT	Flash Flood Warning	PHI	Kent	3 hr
Jul 14, 6:20 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	40 min
Jul 14, 6:32 PM EDT	Areal Flood Advisory	PHI	Sussex	4 hr
Jul 14, 6:48 PM EDT	Special Weather Statement	PHI	Sussex	42 min
Jul 14, 7:15 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	60 min

Nearby

Flash Flood Warnings in New Jersey, 2017 Flash Flood Warnings in Delaware, 2017 Every flash flood warning in 2017

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.