Alert archive / Pennsylvania / Areal Flood Advisories in 2019

Areal Flood Advisory 21, NWS Philadelphia/Mount Holly

April 15, 2019Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood advisory at Apr 15, 2019, 1:26 AM EDT for Carbon County, Monroe County, Pennsylvania. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Apr 15, 2019, 1:26 AM EDT (05:26 UTC)
Expired: Apr 15, 2019, 4:56 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), 139 km from the middle of the area, began a volume at 05:27 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, 5.4 hours before the alert went out and 215 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: 7 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 437 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 236 m²/s²
0-3 km storm-relative helicity: 268 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

415 
WGUS81 KPHI 150526
FLSPHI

Flood Advisory
National Weather Service Mount Holly NJ
126 AM EDT MON APR 15 2019

PAC025-089-150930-
/O.NEW.KPHI.FA.Y.0021.190415T0526Z-190415T0930Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Carbon PA-Monroe PA-
126 AM EDT MON APR 15 2019

The National Weather Service in Mount Holly NJ has issued a

* Flood Advisory for...
  Carbon County in northeastern Pennsylvania...
  Monroe County in northeastern Pennsylvania...

* Until 530 AM EDT.

* At 122 AM EDT, Doppler radar indicated a line of heavy rain along 
  a strong cold front advancing east from central Pennsylvania. Up 
  to one inch of rain has already fallen over northern portions of 
  Carbon and Monroe counties during the past six hours, and with an 
  additional inch of rain about to move into the area, minor 
  flooding is expected. Street and poor drainage flooding are the 
  main threats from this event.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

A Flood Advisory means ponding of water in urban or other areas is 
occurring or is imminent.

&&

LAT...LON 4115 7515 4114 7509 4108 7503 4109 7497
      4099 7513 4095 7515 4093 7522 4087 7527
      4083 7538 4078 7567 4073 7576 4091 7599
      4101 7573 4105 7577 4109 7577 4113 7569
      4112 7564 4123 7554 4125 7513

$$

JJM

1 follow-up statement

581 
WGUS81 KPHI 150856
FLSPHI

Flood Advisory
National Weather Service Mount Holly NJ
456 AM EDT MON APR 15 2019

PAC025-089-150905-
/O.CAN.KPHI.FA.Y.0021.000000T0000Z-190415T0930Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Carbon PA-Monroe PA-
456 AM EDT MON APR 15 2019

...THE FLOOD ADVISORY HAS BEEN CANCELLED FOR CARBON AND MONROE
COUNTIES...

The heavy rain has ended, and flooding is no longer expected to pose
a significant threat.

LAT...LON 4115 7515 4114 7509 4108 7503 4109 7497
      4099 7513 4095 7515 4093 7522 4087 7527
      4083 7538 4078 7567 4073 7576 4091 7599
      4101 7573 4105 7577 4109 7577 4113 7569
      4112 7564 4123 7554 4125 7513

$$

jjm

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 9:19 PM EDT	Areal Flood Advisory	PHI	Berks	3 hr
Apr 15, 12:03 AM EDT	Special Weather Statement	PHI	Monroe	27 min
Apr 15, 1:10 AM EDT	Special Weather Statement	PHI	Schuylkill	50 min
Apr 15, 1:28 AM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	47 min
Apr 15, 1:43 AM EDT	Areal Flood Advisory	PHI	Berks	4 hr
Apr 15, 1:58 AM EDT	Special Weather Statement	PHI	Berks, Carbon, Monroe	47 min
Apr 15, 2:21 AM EDT	Areal Flood Advisory	PHI	Lehigh, Northampton	4 hr
Apr 15, 2:28 AM EDT	Special Weather Statement	PHI	Chester	32 min
Apr 15, 2:34 AM EDT	Special Weather Statement	PHI	Berks, Chester, Lehigh, Northampton	41 min
Apr 15, 2:46 AM EDT	Severe Thunderstorm Warning	PHI	Delaware	44 min
Apr 15, 3:03 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Montgomery, Northampton	20 min
Apr 15, 3:11 AM EDT	Special Weather Statement	PHI	Bucks, Montgomery, Northampton	49 min
Apr 15, 3:19 AM EDT	Tornado Warning	PHI	Delaware, Montgomery, Philadelphia	26 min
Apr 15, 3:19 AM EDT	Wind Advisory	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	18 hr
Apr 15, 3:27 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	32 min
Apr 15, 3:39 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	37 min
Apr 15, 3:59 AM EDT	Areal Flood Advisory	PHI	Montgomery	4 hr

Nearby

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.