Alert archive / Pennsylvania / Flash Flood Warnings in 2009

Flash Flood Warning 16, NWS Philadelphia/Mount Holly

July 29, 2009Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 29, 2009, 1:51 PM EDT for Carbon County, Monroe County, Pennsylvania. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 29, 2009, 1:51 PM EDT (17:51 UTC)
Expired: Jul 29, 2009, 10:45 PM EDT
In force: 9 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), 134 km from the middle of the area, began a volume at 17:52 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 5.9 hours before the alert went out and 195 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: 1577 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 745 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 291751
FFWPHI
PAC025-089-292145-
/O.NEW.KPHI.FF.W.0016.090729T1751Z-090729T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
151 PM EDT WED JUL 29 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF LEHIGHTON...
  MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF MOUNT POCONO...

* UNTIL 545 PM EDT

* AT 144 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  TOBYHANNA...SKYTOP...SCOTRUN...REEDERS...POCONO RACEWAY...PARADISE
  VALLEY...MECKESVILLE...LONG POND...JONAS...HERNYVILLE...
  CHRISTMANS...CANADENSIS...ANALOMINK...ALPINE MOUNTAIN...
  ALBRIGHTSVILLE...POCONO PINES...MOUNTAINHOME AND EAST STROUDSBURG

PRECAUTIONARY/PREPAREDNESS ACTIONS...

UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN ACROSS THE WARNED AREA 
AND MORE IS EXPECTED. 

ALTHOUGH THE THUNDERSTORMS RESPONSIBLE FOR THE FLOODING ARE RAPIDLY 
MOVING, HOURLY RAINFALL RATES ARE BETWEEN THREE AND FOUR INCHES.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE 
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 4124 7513 4116 7516 4115 7509 4106 7510
      4098 7520 4078 7569 4087 7581 4125 7535
      4125 7531 4126 7514

$$

KRUZDLO

3 follow-up statements

000 
WGUS51 KPHI 292139
FFWPHI
PAC025-089-300015-
/O.EXT.KPHI.FF.W.0016.000000T0000Z-090730T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
539 PM EDT WED JUL 29 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  EASTERN CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF LEHIGHTON...
  MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF MOUNT POCONO...

* UNTIL 815 PM EDT

* AT 533 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED   
HEAVY RAINFALL OVER PORTIONS OF THE THE WARNED AREA CAPABLE OF 
PRODUCING FLASH FLOODING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  TOBYHANNA...SKYTOP...PARADISE VALLEY...CANADENSIS...ALPINE
  MOUNTAIN...POCONO PINES AND MOUNTAINHOME

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 4124 7513 4116 7516 4115 7509 4106 7510
      4098 7520 4078 7569 4087 7581 4125 7535
      4125 7531 4126 7514

$$

KRUZDLO

000 
WGUS51 KPHI 300008
FFWPHI
PAC025-089-300245-
/O.EXT.KPHI.FF.W.0016.000000T0000Z-090730T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
808 PM EDT WED JUL 29 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  EASTERN CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF LEHIGHTON...
  MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF MOUNT POCONO...

* UNTIL 1045 PM EDT

* AT 805 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED   
HEAVY RAINFALL OVER PORTIONS OF THE THE WARNED AREA CAPABLE OF 
PRODUCING FLASH FLOODING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  TOBYHANNA...SKYTOP...PARADISE VALLEY...CANADENSIS...ALPINE
  MOUNTAIN...POCONO PINES AND MOUNTAINHOME

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 4124 7513 4116 7516 4115 7509 4106 7510
      4098 7520 4078 7569 4087 7581 4125 7535
      4125 7531 4126 7514

$$

KRUZDLO

000 
WGUS71 KPHI 300240
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1040 PM EDT WED JUL 29 2009

PAC025-089-300250-
/O.EXP.KPHI.FF.W.0016.000000T0000Z-090730T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARBON PA-MONROE PA-
1040 PM EDT WED JUL 29 2009

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1045 PM EDT FOR MONROE AND
EASTERN CARBON COUNTIES...

ALTHOUGH MORE SHOWERS AND THUNDERSTORMS ARE EXPECTED TONIGHT, NO 
FLOODING IS ANTICIPATED.

LAT...LON 4124 7513 4116 7516 4115 7509 4106 7510
      4098 7520 4078 7569 4087 7581 4125 7535
      4125 7531 4126 7514

$$

KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 10:15 AM EDT	Flash Flood Watch	PHI	Berks, Delaware, Lehigh, Northampton, Philadelphia	17 hr
Jul 29, 11:48 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	72 min
Jul 29, 12:12 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	78 min
Jul 29, 1:56 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	64 min
Jul 29, 2:04 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	56 min
Jul 29, 2:11 PM EDT	Tornado Warning	PHI	Carbon, Monroe	34 min
Jul 29, 2:32 PM EDT	Flash Flood Warning	PHI	Monroe	6 hr
Jul 29, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	66 min
Jul 29, 5:28 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Northampton	40 min
Jul 29, 5:55 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Montgomery, Philadelphia	4 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2009 Every flash flood warning in 2009

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.