Alert archive / Pennsylvania / Flash Flood Warnings in 2015

Flash Flood Warning 3, NWS Philadelphia/Mount Holly

May 31, 2015Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at May 31, 2015, 5:42 PM EDT for Carbon County, Monroe County, Pennsylvania. It was in force for 6 hr. 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
May 31, 2015, 5:42 PM EDT (21:42 UTC)
Expired
May 31, 2015, 11:45 PM EDT
In force
6 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

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 21:44 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
May 31, 8:13 PM EDTFLOODMahoning Twp, PASR-443 HAS FLOODING IN THE AREA OF 84-LUMBER.
May 31, 8:13 PM EDTFLASH FLOODMahoning Twp, PASR-443 HAS FLOODING IN THE AREA OF 84-LUMBER.

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 12:00Z, 9.7 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2015-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 106 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2015-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939Sfc1 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
106 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
746 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

817 
WGUS51 KPHI 312142
FFWPHI
PAC025-089-010345-
/O.NEW.KPHI.FF.W.0003.150531T2142Z-150601T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
542 PM EDT SUN MAY 31 2015

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MONROE COUNTY IN NORTHEASTERN PENNSYLVANIA...
  CARBON COUNTY IN NORTHEASTERN PENNSYLVANIA...

* UNTIL 1145 PM EDT SUNDAY
    
* AT 539 PM EDT...DOPPLER RADAR INDICATED MULTIPLE THUNDERSTORMS 
  PRODUCING HEAVY RAIN ACROSS THE POCONOS, WITH MORE STORMS HEADING 
  INTO THE AREA. LOCALLY UP TO TWO INCHES OF RAIN HAVE ALREADY 
  FALLEN TODAY. WITH ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN MOVING 
  INTO THE AREA, FLASH FLOODING IS EXPECTED TO OCCUR.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE LIKELY IN THE 
WARNED AREA WITH THE MOST INTENSE STORMS. IN ADDITION, THE HEAVY
RAIN WILL KNOCK DOWN LEANING, WEAK TREES IN THE REGION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS ONCE ITS NIGHT WHEN IT IS HARDER TO RECOGNIZE 
THE DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4115 7515 4114 7509 4108 7503 4109 7497
      4099 7513 4095 7515 4093 7522 4086 7529
      4083 7538 4078 7567 4073 7576 4091 7599
      4101 7573 4105 7577 4109 7577 4113 7569
      4112 7564 4123 7554 4125 7513

$$
2 follow-up statements
009 
WGUS71 KPHI 312248
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
648 PM EDT SUN MAY 31 2015

PAC025-089-010345-
/O.CON.KPHI.FF.W.0003.000000T0000Z-150601T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE PA-CARBON PA-
648 PM EDT SUN MAY 31 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT SUNDAY
FOR MONROE AND CARBON COUNTIES...

AT 645 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
HEAVY RAIN RE-ENTERING CARBON COUNTY WITH ANOTHER THUNDERSTORM WITH 
VERY HEAVY RAIN NEAR MCMICHAEL IN MONROE COUNTY. LOCALLY UP TO THREE 
INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS LIKELY TO
OCCUR.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4115 7515 4114 7509 4108 7503 4109 7497
      4099 7513 4095 7515 4093 7522 4086 7529
      4083 7538 4078 7567 4073 7576 4091 7599
      4101 7573 4105 7577 4109 7577 4113 7569
      4112 7564 4123 7554 4125 7513

$$
864 
WGUS71 KPHI 010244
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1044 PM EDT SUN MAY 31 2015

PAC025-089-010345-
/O.CON.KPHI.FF.W.0003.000000T0000Z-150601T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE PA-CARBON PA-
1044 PM EDT SUN MAY 31 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT SUNDAY
FOR MONROE AND CARBON COUNTIES...

AT 1040 PM EDT...DOPPLER RADAR INDICATED SCATTERED HEAVY SHOWERS AND 
ISOLATED THUNDERSTORMS STILL PRODUCING SPOTTY HEAVY RAIN ACROSS THE 
WARNED AREA. 

THERE IS CURRENTLY NO PLAN TO EXTEND THE WARNING ALTHOUGH MORE 
SHOWERS AND STORMS WILL BE MOVING ACROSS THE POCONOS THROUGH THE 
EARLY MORNING HOURS.  THE WORST OF THE TORRENTIAL RAINS HAS ALREADY 
OCCURRED.  THERE MAY BE POCKETS OF RESIDUAL FLOODING CONTINUE FOR A 
WHILE LONGER.   
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD 
DEATHS OCCUR IN VEHICLES AND ITS MUCH MORE DANGEROUS TO CROSS A 
FLOODED ROAD AT NIGHT.  

&&

LAT...LON 4115 7515 4114 7509 4108 7503 4109 7497
      4099 7513 4095 7515 4093 7522 4086 7529
      4084 7544 4085 7557 4073 7576 4089 7590
      4096 7585 4101 7573 4105 7577 4109 7577
      4113 7569 4112 7564 4123 7554 4125 7513

$$

DRAG

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 8:19 PM EDTSpecial Weather StatementPHICarbon56 min
May 30, 8:46 PM EDTSpecial Weather StatementPHILebanon29 min
May 30, 9:03 PM EDTAreal Flood AdvisoryPHIBerks3 hr
May 30, 9:11 PM EDTSpecial Weather StatementPHILebanon64 min
May 30, 9:20 PM EDTSpecial Weather StatementPHICarbon55 min
May 30, 9:36 PM EDTAreal Flood AdvisoryPHICarbon3 hr
May 31, 1:00 PM EDTSevere Thunderstorm WarningPHINorthampton45 min
May 31, 1:11 PM EDTFlash Flood WatchPHIBerks, Bucks, Carbon, Lehigh, Monroe, Northampton13 hr
May 31, 4:33 PM EDTSevere Thunderstorm WarningPHIMonroe, Northampton42 min
May 31, 5:12 PM EDTSevere Thunderstorm WarningPHIMonroe63 min
May 31, 5:23 PM EDTSevere Thunderstorm WarningPHIBerks37 min
May 31, 7:08 PM EDTSpecial Weather StatementPHILehigh82 min
May 31, 7:27 PM EDTAreal Flood AdvisoryPHIBerks, Lehigh5 hr
May 31, 7:46 PM EDTFlash Flood WarningPHIBerks, Lehigh4 hr
May 31, 7:48 PM EDTSevere Thunderstorm WarningPHIBerks35 min
May 31, 7:57 PM EDTAreal Flood AdvisoryPHILehigh, Northampton6 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2015Every flash flood warning in 2015

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.