Alert archive / New Jersey / Areal Flood Advisories in 2019

Areal Flood Advisory 5, NWS Philadelphia/Mount Holly

January 20, 20196 counties in New Jersey; 4 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jan 20, 2019, 1:11 AM EST for 6 counties in New Jersey; 4 counties in Pennsylvania. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jan 20, 2019, 1:11 AM EST (06:11 UTC)
Expired: Jan 20, 2019, 9:15 AM EST
In force: 8 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Mercer County, NJ, Monmouth County, NJ, Salem County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 51 km from the middle of the area, began a volume at 06:14 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

Brookhaven, NY (KOKX), launched 00:00Z, 6.2 hours before the alert went out and 205 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: 665 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 253 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at Jan 19, 11:27 PM EST, 1 hour 44 minutes earlier.

Area forecast discussion, Jan 19, 11:27 PM EST, 1 hour 44 minutes before

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Hazardous weather outlook, Jan 19, 11:23 PM EST, 1 hour 48 minutes before

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In the hours before

Local storm report, Jan 19, 11:37 PM EST, 1 hour 34 minutes before

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Local storm report, Jan 19, 11:40 PM EST, 1 hour 31 minutes before

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Local storm report, Jan 19, 11:47 PM EST, 1 hour 24 minutes before

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Local storm report, Jan 19, 11:55 PM EST, 1 hour 16 minutes before

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Local storm report, Jan 20, 12:18 AM EST, 53 minutes before

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Local storm report, Jan 20, 1:05 AM EST, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
105 AM EST SUN JAN 20 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 AM     SNOW             COOLBAUGH TWP           41.18N 75.36W
01/20/2019  E7.0 INCH        MONROE             PA   TRAINED SPOTTER

            SNOWFALL RATES OF 1 IN/HR FOR PAST THREE
            HOURS.

&&

TCD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 19, 11:52 PM EST	Areal Flood Advisory	PHI	Gloucester, Salem	8 hr
Jan 20, 1:13 AM EST	Special Weather Statement	PHI	Burlington, Mercer, Middlesex	47 min
Jan 20, 1:58 AM EST	Special Weather Statement	PHI	Monmouth	32 min
Jan 20, 3:38 AM EST	Wind Chill Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	50 hr
Jan 20, 4:13 AM EST	Areal Flood Warning	PHI	Hunterdon, Somerset	3 hr
Jan 20, 4:48 AM EST	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset	4 hr
Jan 20, 6:12 AM EST	Special Weather Statement	PHI	Atlantic, Cumberland	33 min
Jan 20, 9:49 AM EST	Wind Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	30 hr
Jan 20, 10:03 AM EST	Wind Chill Warning	PHI	Carbon, Monroe	27 hr

Nearby

Areal Flood Advisories in New Jersey, 2019 Areal Flood Advisories in Pennsylvania, 2019 Every areal flood advisory in 2019

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.