Alert archive / Pennsylvania / Flash Flood Warnings in 2024

Flash Flood Warning 28, NWS Philadelphia/Mount Holly

August 3, 2024Carbon County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 3, 2024, 2:53 PM EDT for Carbon County, Pennsylvania. It was in force for 117 min. 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 3, 2024, 2:53 PM EDT (18:53 UTC)
Expired: Aug 3, 2024, 4:50 PM EDT
In force: 117 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Carbon County, PA

The radar

The Binghamton radar (KBGM), 133 km from the middle of the area, began a volume at 18:56 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 12:00Z, 6.9 hours before the alert went out and 240 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: 388 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 974 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted.

655 
WGUS51 KPHI 031853
FFWPHI
PAC025-032300-
/O.NEW.KPHI.FF.W.0028.240803T1853Z-240803T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
253 PM EDT Sat Aug 3 2024

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Central Carbon County in northeastern Pennsylvania...

* Until 700 PM EDT.

* At 253 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. The expected rainfall rate is 1 to 2 inches in 1 
  hour. Additional rainfall amounts of 1 to 3 inches are possible in 
  the warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets, and underpasses as well as other
           drainage and low lying areas.

* Some locations that may experience flash flooding include...
  Jim Thorpe, Nesquehoning, Weatherly, Christmans, Albrightsville, 
  Lake Harmony, Beaver Meadows and Tresckow.

This includes the following highways...
	Interstate 80 in Pennsylvania between mile markers 277 and 286.
	Northeast Extension between mile markers 85 and 96.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4111 7569 4111 7562 4109 7561 4109 7560
      4107 7558 4106 7557 4103 7557 4096 7562
      4093 7567 4087 7578 4085 7592 4091 7600
      4096 7586 4098 7584 4101 7573 4103 7574
      4103 7576 4106 7577 4108 7575

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

Hoeflich

2 follow-up statements

427 
WGUS71 KPHI 032028
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
428 PM EDT Sat Aug 3 2024

PAC025-032300-
/O.CON.KPHI.FF.W.0028.000000T0000Z-240803T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Carbon PA-
428 PM EDT Sat Aug 3 2024

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING 
FOR CENTRAL CARBON COUNTY...

At 428 PM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1.5 and 3 inches of rain have 
fallen. Additional rainfall amounts up to 1 inch are possible in the 
warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets, and underpasses as well as other
         drainage and low lying areas.

Some locations that may experience flash flooding include...
  Jim Thorpe, Nesquehoning, Weatherly, Christmans, Albrightsville, 
  Lake Harmony, Beaver Meadows and Tresckow.

This includes the following highways...
	Interstate 80 in Pennsylvania between mile markers 277 and 286.
	Northeast Extension between mile markers 85 and 96.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4111 7569 4111 7562 4109 7561 4109 7560
      4107 7558 4106 7557 4103 7557 4096 7562
      4093 7567 4087 7578 4085 7592 4091 7600
      4096 7586 4098 7584 4101 7573 4103 7574
      4103 7576 4106 7577 4108 7575

FLASH FLOOD...RADAR INDICATED

$$

Hoeflich

317 
WGUS71 KPHI 032050
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
450 PM EDT Sat Aug 3 2024

PAC025-032100-
/O.CAN.KPHI.FF.W.0028.000000T0000Z-240803T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Carbon PA-
450 PM EDT Sat Aug 3 2024

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL CARBON COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flood Watch remains in effect until 1200 AM EDT Sunday for 
portions of northern Delaware, New Jersey, and Pennsylvania.

&&

LAT...LON 4111 7569 4111 7562 4109 7561 4109 7560
      4107 7558 4106 7557 4103 7557 4096 7562
      4093 7567 4087 7578 4085 7592 4091 7600
      4096 7586 4098 7584 4101 7573 4103 7574
      4103 7576 4106 7577 4108 7575

$$

Hoeflich

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 9:12 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	48 min
Aug 2, 9:40 PM EDT	Flash Flood Warning	PHI	Delaware, Philadelphia	4 hr
Aug 3, 3:17 AM EDT	Heat Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	17 hr
Aug 3, 12:20 PM EDT	Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	9 hr
Aug 3, 2:40 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	65 min
Aug 3, 3:41 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	45 min
Aug 3, 4:13 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	47 min
Aug 3, 5:38 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Chester, Delaware	97 min
Aug 3, 6:16 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	59 min
Aug 3, 6:49 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	56 min

Nearby

Flash Flood Warnings in Pennsylvania, 2024 Every flash flood warning in 2024

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.