Alert archive / Pennsylvania / Areal Flood Advisories in 2018

Areal Flood Advisory 297, NWS Philadelphia/Mount Holly

September 18, 2018Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood advisory at Sep 18, 2018, 6:27 AM EDT for Carbon County, Monroe County, Pennsylvania. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Sep 18, 2018, 6:27 AM EDT (10:27 UTC)
Expired: Sep 18, 2018, 10:30 AM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Carbon County, PA, Monroe County, PA

The radar

The Binghamton radar (KBGM), 140 km from the middle of the area, began a volume at 10:29 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

Albany, NY (KALY), launched 00:00Z, 10.5 hours before the alert went out and 236 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: 8 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1049 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 131 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 Sep 18, 6:22 AM EDT, 5 minutes earlier.

Area forecast discussion, Sep 18, 6:22 AM EDT, 5 minutes before

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Hazardous weather outlook, Sep 18, 4:16 AM EDT, 2 hours 11 minutes before

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In the hours before

Special weather statement, Sep 18, 1:13 AM EDT, 5 hours 14 minutes before

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Special weather statement, Sep 18, 2:09 AM EDT, 4 hours 18 minutes before

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Special weather statement, Sep 18, 4:13 AM EDT, 2 hours 14 minutes before

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Local storm report, Sep 18, 4:53 AM EDT, 1 hour 34 minutes before

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Local storm report, Sep 18, 4:59 AM EDT, 1 hour 28 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 18, 4:13 AM EDT	Special Weather Statement	PHI	Camden, Gloucester, Salem	92 min
Sep 18, 9:27 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 5 more	6 hr
Sep 18, 10:59 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	4 hr
Sep 18, 12:01 PM EDT	Flash Flood Warning	PHI	Mercer, Middlesex, Somerset	4 hr
Sep 18, 12:16 PM EDT	Special Weather Statement	PHI	Middlesex	29 min
Sep 18, 12:36 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 2 more	3 hr
Sep 18, 1:20 PM EDT	Special Weather Statement	PHI	Burlington	25 min
Sep 18, 1:35 PM EDT	Special Marine Warning	PHI		55 min
Sep 18, 2:51 PM EDT	Special Marine Warning	PHI		38 min
Sep 18, 2:55 PM EDT	Special Weather Statement	PHI	Ocean	35 min
Sep 18, 3:02 PM EDT	Areal Flood Advisory	PHI	Burlington, Ocean	3 hr
Sep 18, 3:12 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Ocean	47 min
Sep 18, 3:47 PM EDT	Special Weather Statement	PHI	Ocean	28 min
Sep 18, 4:12 PM EDT	Special Weather Statement	PHI	Atlantic	33 min
Sep 18, 4:47 PM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May, Cumberland, Ocean	2 hr
Sep 18, 5:17 PM EDT	Flash Flood Warning	PHI	Atlantic	113 min
Sep 18, 1:13 AM EDT	Special Weather Statement	PHI	Chester	62 min
Sep 18, 2:09 AM EDT	Special Weather Statement	PHI	Chester, Delaware, Montgomery, Philadelphia	81 min
Sep 18, 2:38 AM EDT	Areal Flood Advisory	PHI	Chester, Montgomery	4 hr
Sep 18, 10:57 AM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	3 hr
Sep 18, 5:26 PM EDT	Special Weather Statement	PHI	Sussex	34 min

Nearby

Areal Flood Advisories in Pennsylvania, 2018 Every areal flood advisory in 2018

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.