Alert archive / Pennsylvania / Flash Flood Warnings in 2023

Flash Flood Warning 56, NWS Philadelphia/Mount Holly

July 15, 2023Carbon County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 15, 2023, 8:56 PM EDT for Carbon County, Pennsylvania. It was in force for 95 min. 2 reports 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 15, 2023, 8:56 PM EDT (00:56 UTC)
Expired
Jul 15, 2023, 10:31 PM EDT
In force
95 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

County Carbon County, PA

The radar

The Philadelphia radar (KDIX), 150 km from the middle of the area, began a volume at 00:56 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.

What was reported inside it

TimeReportWhereRemark
Jul 15, 9:05 PM EDTRAIN 2.19Jim Thorpe, PAStorm total.
Jul 15, 9:40 PM EDTRAIN 2.11 Sw Jim Thorpe, PAMesonet station GW2967 Jim Thorpe.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.9 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-pSkew-T log-p diagram, Brookhaven, NY at 00:00Z on 2023-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1061 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2023-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1061 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
624 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
29 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.0

Open this sounding in Storm Lab

The text

As transmitted.

304 
WGUS51 KPHI 160056
FFWPHI
PAC025-160345-
/O.NEW.KPHI.FF.W.0056.230716T0056Z-230716T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
856 PM EDT Sat Jul 15 2023

The National Weather Service in Mount Holly has issued a

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

* Until 1145 PM EDT.

* At 856 PM EDT, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across the warned area. Between 
  1.5 and 2.5 inches of rain have fallen. The expected rainfall rate 
  is 0.5 to 1 inch in 1 hour. Additional rainfall amounts of 0.5 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 and automated gauges.

  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...
  Lehighton, Palmerton, Jim Thorpe, Nesquehoning, Weatherly, 
  Beltzville State Park, Christmans, New Mahoning, Lansford, Summit 
  Hill, Bowmanstown, and Parryville.

This includes the following highways...
	Northeast Extension between mile markers 72 and 88.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles. Be especially cautious at night when 
it is harder to recognize the dangers of flooding.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 4082 7589 4085 7588 4101 7573 4100 7562
      4095 7558 4083 7556 4079 7561 4077 7569
      4074 7576

FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR

$$

Staarmann
2 follow-up statements
356 
WGUS71 KPHI 160202
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
1002 PM EDT Sat Jul 15 2023

PAC025-160345-
/O.CON.KPHI.FF.W.0056.000000T0000Z-230716T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Carbon PA-
1002 PM EDT Sat Jul 15 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT THIS 
EVENING FOR SOUTHERN CARBON COUNTY...

At 1002 PM EDT, Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain across the warned area. Between 
1.5 and 3 inches of rain have fallen. Flash flooding is ongoing or 
expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar and automated gauges.

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...
  Lehighton, Palmerton, Jim Thorpe, Nesquehoning, New Mahoning, 
  Beltzville State Park, Lansford, Summit Hill, Bowmanstown, 
  Parryville, Weissport, and Weissport East.

This includes the following highways...
	Northeast Extension between mile markers 72 and 83.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles. Be especially cautious at night when 
it is harder to recognize the dangers of flooding.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 4082 7589 4085 7588 4091 7574 4094 7564
      4091 7561 4082 7559 4079 7561 4077 7569
      4074 7576

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

Staarmann
485 
WGUS71 KPHI 160231
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
1031 PM EDT Sat Jul 15 2023

PAC025-160241-
/O.CAN.KPHI.FF.W.0056.000000T0000Z-230716T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Carbon PA-
1031 PM EDT Sat Jul 15 2023

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

The heavy rain has ended. Flooding is no longer expected to pose a 
threat.

LAT...LON 4082 7589 4085 7588 4091 7574 4094 7564
      4091 7561 4082 7559 4079 7561 4077 7569
      4074 7576

$$

Staarmann

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 8:37 PM EDTAreal Flood AdvisoryPHICarbon19 min
Jul 15, 8:44 PM EDTSevere Thunderstorm WarningPHICarbon, Monroe30 min
Jul 16, 12:50 AM EDTSpecial Weather StatementPHIBerks25 min
Jul 16, 1:41 AM EDTSpecial Weather StatementPHICarbon, Lehigh34 min
Jul 16, 2:12 AM EDTSpecial Weather StatementPHICarbon, Lehigh, Monroe33 min
Jul 16, 2:43 AM EDTFlash Flood WarningPHICarbon, Lehigh, Monroe, Northampton4 hr
Jul 16, 2:47 AM EDTSpecial Weather StatementPHIChester, Delaware28 min
Jul 16, 3:40 AM EDTFlash Flood WarningPHIMonroe, Northampton7 hr
Jul 16, 4:05 AM EDTFlash Flood WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton6 hr
Jul 16, 4:14 AM EDTSpecial Weather StatementPHIBucks31 min
Jul 16, 4:38 AM EDTTornado WarningPHIBucks37 min
Jul 16, 9:12 AM EDTFlash Flood WarningPHIChester2 hr
Jul 16, 9:40 AM EDTFlash Flood WarningPHIBucks, Chester, Delaware, Montgomery, Philadelphia3 hr
Jul 16, 9:53 AM EDTTornado WarningPHIMontgomery, Philadelphia37 min
Jul 16, 10:54 AM EDTAreal Flood WarningPHIMonroe, Northampton5 hr
Jul 16, 11:08 AM EDTFlash Flood WarningPHIDelaware, Philadelphia3 hr
Jul 16, 12:22 PM EDTAreal Flood AdvisoryPHIBucks, Philadelphia3 hr
Jul 16, 12:26 PM EDTAreal Flood AdvisoryPHIPhiladelphia3 hr
Jul 16, 1:47 PM EDTAreal Flood AdvisoryPHIDelaware, Philadelphia80 min
Jul 16, 6:44 PM EDTAreal Flood AdvisoryPHIBucks90 min

Nearby

Flash Flood Warnings in Pennsylvania, 2023Every flash flood warning in 2023

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.