Alert archive / Pennsylvania / Areal Flood Warnings in 2018

Areal Flood Warning 46, NWS Philadelphia/Mount Holly

August 4, 2018Lehigh County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood warning at Aug 4, 2018, 2:22 AM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 21 hr. 21 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
Aug 4, 2018, 2:22 AM EDT (06:22 UTC)
Expired
Aug 4, 2018, 11:46 PM EDT
In force
21 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Lehigh County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 116 km from the middle of the area, began a volume at 06:23 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
Aug 4, 3:16 AM EDTFLOODForks, PASTREET FLOODING REPORTED IN FORKS.
Aug 4, 3:26 AM EDTFLOODPalmer Twp, PASTREET FLOODING REPORTED IN PALMER TWP.
Aug 4, 3:56 AM EDTFLOODHanover, PASTREET FLOODING REPORTED IN HANOVER.
Aug 4, 4:42 AM EDTFLOODZucksville, PAFLOODING ON BUSHKILL DR./13TH ST. IN BOTH DIRECTIONS BETWEEN STOCKER MILL RD. AND KESSLERVILLE RD. ALL LANES CLOSED.
Aug 4, 4:42 AM EDTFLOODZucksville, PAFLOODING ON BUSHKILL DRIVE BETWEEN STOCKER MILL ROAD AND KESSLERVILLE ROAD. ALL LANES CLOSED.
Aug 4, 5:15 AM EDTFLOODWhitehall Twp, PATHREE WATER RESCUES CAUSED BY VEHICLES DRIVING PAST BARRICADES IN WHITEHALL TWP. THESE OCCURRED BETWEEN 515 AM AND 1015 AM.
Aug 4, 6:00 AM EDTFLOOD1 Sw Bethlehem, PAINUNDATION OF SEVERAL MUSIC FESTIVAL VENUES IN BETHLEHEM AS A RESULT OF FLOODING ON MONOCACY CREEK. TIME BASED ON RIVER GAUGE REPORTS.
Aug 4, 6:00 AM EDTFLOODAllentown, PASEVERAL ROADS FLOODED IN LEHIGH COUNTY...ESPECIALLY IN ALLENTOWN. THESE INCLUDE THE INTERSECTION OF ROUTE 309 AND VILLAGE ROAD IN SOUTH WHITEHALL TOWNSHIP...BASIN AND UNION STREETS NEAR LITTLE LEHIGH CREEK...BATH PIKE IN EAST ALLEN...AND HAMILTON STREET IN ALL
Aug 4, 6:00 AM EDTFLOODCatasauqua, PAFLOODING OF THE CATASAQUA CREEK INUNDATED THE CITY POOL, FORCING ITS CLOSURE.
Aug 4, 6:00 AM EDTFLOODLower Nazareth Twp, PASEVERAL ROADS CLOSED IN NORTHAMPTON COUNTY...INCLUDING STEUBEN ROAD FROM KEYSTONE DRIVE TO GEORGETOWN ROAD IN LOWER NAZARETH TOWNSHIP...KESSLERSVILLE ROAD NORTH OF KUEBLER ROAD IN FORKS TOWNSHIP...AND THE INTERSECTION OF VAN BUREN AND CORRIERE ROADS IN PALMER
Aug 4, 6:06 AM EDTFLOODEast Allen Twp, PAWATER RESCUES AS A RESULT OF VEHICLES DRIVING PAST BARRICADES IN EAST ALLEN TOWNSHIP.
Aug 4, 6:07 AM EDTFLOODChapman, PAFLOODING ON YOST ROAD BETWEEN MAIN STREET AND ENGLISH ROAD. ALL LANES CLOSED.
Aug 4, 6:09 AM EDTFLOODChapman, PAFLOODING ON YOST RD./5TH ST. BETWEEN MAIN ST. AND ENGLISH RD. ALL LANES CLOSED.
Aug 4, 7:00 AM EDTHEAVY RAIN 4.57Martins Creek, PA24-HOUR TOTAL. MARTIN'S CREEK RUNNING HIGH BUT NO FLOODING.
Aug 4, 8:00 AM EDTFLOOD1 Nnw Ancient Oaks, PAFLOODING OF SPRING CREEK ROAD AND RESIDENTIAL STREETS NEAR LITTLE LEHIGH CREEK IN LOWER MACUNGIE TWP. VIDEO ON SOCIAL MEDIA SHOWS WATER REACHING THE WINDSHIELD OF A CAR PARKED ON SPRING CREEK ROAD ADJACENT TO LITTLE LEHIGH CREEK.
Aug 4, 8:00 AM EDTHEAVY RAIN 4.75Northampton, PA24-HOUR TOTAL.
Aug 4, 8:38 AM EDTFLOODClyde, PAFLOODING ON PA 512 IN BOTH DIRECTIONS BETWEEN JAINDL BLVD. AND SILVER CREST RD. ALL LANES CLOSED.
Aug 4, 9:03 AM EDTHEAVY RAIN 3.07Germansville, PASTORM TOTAL RAINFALL.
Aug 4, 10:08 AM EDTFLOOD1 Nne Ancient Oaks, PAFLOODING ALONG THE LITTLE LEHIGH CREEK NEAR SPRING CREEK AND LOWER MACUNGIE ROADS.
Aug 4, 11:30 AM EDTFLOODBethlehem, PAPHOTO SHOWS RIVER FLOODING AT THE MUSIKFEST STREET FAIR. THIS IS NOT CONFIRMED AT THIS TIME.
Aug 4, 12:38 PM EDTFLOODMutchlertown, PAFLOODING ON LARRY HOLMES DR./IRON ST./KEYSTONE ST./LEHIGH DR./WASHINGTON ST. IN BOTH DIRECTIONS BETWEEN LEHIGH DR./HUGH MOORE PARK RD. AND 4TH ST./WASHINGTON ST. ALL LANES CLOSED.

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, 6.4 hours before the alert went out and 203 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 2018-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1302 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2018-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 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
1302 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
561 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
32 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

240 
WGUS41 KPHI 040622
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
222 AM EDT SAT AUG 4 2018

PAC077-095-041015-
/O.NEW.KPHI.FA.W.0046.180804T0622Z-180804T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-Northampton PA-
222 AM EDT SAT AUG 4 2018

The National Weather Service in Mount Holly NJ has issued a

* Flood Warning for...
  Lehigh County in eastern Pennsylvania...
  Northampton County in eastern Pennsylvania...

* Until 615 AM EDT.

* At 217 AM EDT, Doppler radar indicated heavy rain that will cause 
  flooding. Up to two and a half inches of rain have already fallen 
  in western portions of Lehigh and Northampton Counties. Flooding 
  has already been reported from rainfall occurring earlier tonight. 
  With more rainfall expected, flooding is expected to continue for 
  the next few hours, especially of small creeks and streams, urban 
  areas, and locations with poor drainage. This flood warning 
  replaces the flash flood warning previously in effect.

* Some locations that could experience flooding include...
  Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson,
  Hellertown, Nazareth, Bangor, Slatington, Pen Argyl, Wind Gap,
  Bath, Walnutport, Belfast, West Easton, Tatamy, East Bangor and
  Steuben.

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.

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 4096 7513 4087 7505 4085 7510 4079 7511
      4078 7517 4075 7519 4068 7520 4067 7517
      4065 7520 4061 7520 4054 7534 4042 7549
      4068 7589 4078 7567 4083 7538 4086 7529
      4093 7522

$$

CMS
9 follow-up statements
453 
WGUS81 KPHI 040741
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
341 AM EDT SAT AUG 4 2018

PAC077-095-041015-
/O.CON.KPHI.FA.W.0046.000000T0000Z-180804T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-Northampton PA-
341 AM EDT SAT AUG 4 2018

...A FLOOD WARNING REMAINS IN EFFECT UNTIL 615 AM EDT FOR LEHIGH AND
NORTHAMPTON COUNTIES...

At 340 AM EDT, the public reported flooding across the warned area.
Street flooding has been reported in Forks, Palmer, and Bethlehem 
during the past hour. Heavy rainfall will continue for the next 
couple of hours, with flooding expected to continue.

Some locations that could experience flooding include...
Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson,
Hellertown, Nazareth, Bangor, Slatington, Pen Argyl, Wind Gap, Bath,
Walnutport, Belfast, West Easton, Tatamy, East Bangor and Steuben.

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.

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 4096 7513 4087 7505 4085 7510 4079 7511
      4078 7517 4075 7519 4068 7520 4067 7517
      4065 7520 4061 7520 4054 7534 4042 7549
      4068 7589 4078 7567 4083 7538 4086 7529
      4093 7522

$$

CMS
026 
WGUS81 KPHI 040924
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
524 AM EDT SAT AUG 4 2018

PAC077-095-041015-
/O.CON.KPHI.FA.W.0046.000000T0000Z-180804T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-Northampton PA-
524 AM EDT SAT AUG 4 2018

...A FLOOD WARNING REMAINS IN EFFECT UNTIL 615 AM EDT FOR LEHIGH AND
NORTHAMPTON COUNTIES...

At 519 AM EDT, local law enforcement reported flooding across the 
warned area. Several roads are flooded and a few are closed in 
Northampton County, including portions of Bushkill Drive in Easton. 
The Monocacy Creek gauge in Bethlehem is approaching minor flood 
stage at this time with flooding on Conestoga Street expected to 
occur in the next couple of hours. Street flooding has also been 
reported in Allentown. Moderate to locally heavy rainfall will 
continue for the next couple of hours. Thus, flooding is expected to 
continue.

Some locations that could experience flooding include...
Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson,
Hellertown, Nazareth, Bangor, Slatington, Pen Argyl, Wind Gap, Bath,
Walnutport, Belfast, West Easton, Tatamy, East Bangor and Steuben.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flood Warning means that flooding is imminent or occurring. All
interested parties should take necessary precautions immediately.

&&

LAT...LON 4096 7513 4087 7505 4085 7510 4079 7511
      4078 7517 4075 7519 4068 7520 4067 7517
      4065 7520 4061 7520 4054 7534 4042 7549
      4068 7589 4078 7567 4083 7538 4086 7529
      4093 7522

$$

CMS
033 
WGUS41 KPHI 041005
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
605 AM EDT SAT AUG 4 2018

PAC077-095-041415-
/O.EXT.KPHI.FA.W.0046.000000T0000Z-180804T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-Northampton PA-
605 AM EDT SAT AUG 4 2018

The National Weather Service in Mount Holly NJ has extended the

* Flood Warning for...
  Lehigh County in eastern Pennsylvania...
  Northampton County in eastern Pennsylvania...

* Until 1015 AM EDT.

* At 601 AM EDT, local law enforcement reported flooding in much of 
  the warned area. Street flooding has been reported in Easton, 
  Bushkill Township, Bethlehem, and Wind Gap during the past hour. 
  The Monocacy Creek is near flood stage at this time and will 
  likely reach minor flood within the next hour. Conestoga Street in 
  Bethlehem is expected to flood as a result. Widespread two to four 
  inch rainfall totals have been reported in the warned area. 
  Moderate to locally heavy rain will continue for the next hour or 
  so, with flooding likely to occur for the next several hours.

* Some locations that could experience flooding include...
  Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson,
  Hellertown, Nazareth, Bangor, Slatington, Pen Argyl, Wind Gap,
  Bath, Walnutport, Belfast, West Easton, Tatamy, East Bangor and
  Steuben.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flood Warning means that flooding is imminent or occurring. All
interested parties should take necessary precautions immediately.

&&

LAT...LON 4096 7513 4087 7505 4085 7510 4079 7511
      4078 7517 4075 7519 4068 7520 4067 7517
      4065 7520 4061 7520 4054 7534 4042 7549
      4068 7589 4078 7567 4083 7538 4086 7529
      4093 7522

$$

CMS
246 
WGUS41 KPHI 041404
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
1004 AM EDT SAT AUG 4 2018

PAC077-095-041815-
/O.EXT.KPHI.FA.W.0046.000000T0000Z-180804T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-Northampton PA-
1004 AM EDT SAT AUG 4 2018

The National Weather Service in Mount Holly NJ has extended the

* Flood Warning for...
  Lehigh County in eastern Pennsylvania...
  Northampton County in eastern Pennsylvania...

* Until 215 PM EDT.

* At 954 AM EDT, rainfall has ended across the area. However, 
  widespread rainfall amounts of two to four inches of rain fell 
  across the area earlier and is leading to flooding across the 
  area. Several local creeks and streams continue to rise, including 
  the Monocacy Creek and the Little Lehigh River. Several roadways 
  remain flooded and this residual flooding will continue for 
  another few hours.

* Some locations that could experience flooding include...
  Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson,
  Hellertown, Nazareth, Bangor, Slatington, Pen Argyl, Wind Gap,
  Bath, Walnutport, Belfast, West Easton, Tatamy, East Bangor and
  Steuben.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flood Warning means that flooding is imminent or occurring. All
interested parties should take necessary precautions immediately.

&&

LAT...LON 4096 7513 4087 7505 4085 7510 4079 7511
      4078 7517 4075 7519 4068 7520 4067 7517
      4065 7520 4061 7520 4054 7534 4042 7549
      4068 7589 4078 7567 4083 7538 4086 7529
      4093 7522

$$

Robertson
195 
WGUS41 KPHI 041735
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
135 PM EDT SAT AUG 4 2018

PAC077-095-042215-
/O.EXT.KPHI.FA.W.0046.000000T0000Z-180804T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-Northampton PA-
135 PM EDT SAT AUG 4 2018

The National Weather Service in Mount Holly NJ has extended the

* Flood Warning for...
  Lehigh County in eastern Pennsylvania...
  Northampton County in eastern Pennsylvania...

* Until 615 PM EDT.

* At 130 PM EDT, minor flooding was occurring along many small 
  streams and creeks in Lehigh County and Northampton County. The 
  flooding is due to runoff from last night's heavy rainfall.
  Stream and creek levels will fall this afternoon and most should 
  return within their banks by early this evening, including the 
  Little Lehigh Creek in Lehigh County and the Monocacy Creek in 
  Northampton County.

* Some locations that are experiencing minor flooding include...
  Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson,
  Hellertown, Nazareth, Bangor, Slatington, Pen Argyl, Wind Gap,
  Bath, Walnutport, Belfast, West Easton, Tatamy, East Bangor and
  Steuben.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4096 7513 4087 7505 4085 7510 4079 7511
      4078 7517 4075 7519 4068 7520 4067 7517
      4065 7520 4061 7520 4054 7534 4042 7549
      4068 7589 4078 7567 4083 7538 4086 7529
      4093 7522

$$

Iovino
299 
WGUS41 KPHI 041924
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
324 PM EDT SAT AUG 4 2018

PAC077-095-050215-
/O.EXT.KPHI.FA.W.0046.000000T0000Z-180805T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-Northampton PA-
324 PM EDT SAT AUG 4 2018

The National Weather Service in Mount Holly NJ has extended the

* Flood Warning for...
  Lehigh County in eastern Pennsylvania...
  Northampton County in eastern Pennsylvania...

* Until 1015 PM EDT Saturday.

* At 320 PM EDT, minor flooding was occurring along many small 
  streams and creeks in Lehigh County and Northampton County. The 
  flooding is due to runoff from last night's heavy rainfall.
  Stream and creek levels will fall slowly and most should return 
  within their banks this evening, including the Little Lehigh Creek 
  in Lehigh County and the Monocacy Creek in Northampton County.

* Some locations that are experiencing minor flooding include... 
  Allentown, Easton, Bethlehem, Forks, Emmaus, Northampton, Wilson, 
  Hellertown, Nazareth, Bangor, Slatington, Pen Argyl, Wind Gap, 
  Bath, Walnutport, Belfast, West Easton, Tatamy, East Bangor and 
  Steuben.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4096 7513 4087 7505 4085 7510 4079 7511
      4078 7517 4075 7519 4068 7520 4067 7517
      4065 7520 4061 7520 4054 7534 4042 7549
      4068 7589 4078 7567 4083 7538 4086 7529
      4093 7522

$$

Iovino
074 
WGUS81 KPHI 050040
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
840 PM EDT SAT AUG 4 2018

PAC095-050046-
/O.CAN.KPHI.FA.W.0046.000000T0000Z-180805T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northampton PA-
840 PM EDT SAT AUG 4 2018

...THE FLOOD WARNING HAS BEEN CANCELLED FOR NORTHAMPTON COUNTY...

The flood waters continue to recede in Northampton County. As a 
result, the flood warning has been cancelled for the county.

LAT...LON 4060 7545 4051 7551 4057 7560 4061 7547

$$

PAC077-050215-
/O.CON.KPHI.FA.W.0046.000000T0000Z-180805T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-
840 PM EDT SAT AUG 4 2018

...A FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR CENTRAL 
LEHIGH COUNTY...

At 835 PM EDT, minor flooding was occurring along the Little Lehigh 
Creek and some of its tributaries in Lehigh County. Most other small 
streams and creeks in the county have returned within their banks. 
The minor flooding along the Little Lehigh is expected to continue 
with the creek returning back below flood stage after midnight.
The Flood Warning will be extended shortly.

Some locations that could experience flooding include...
Allentown and Emmaus. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4060 7545 4051 7551 4057 7560 4061 7547

$$

Iovino
570 
WGUS41 KPHI 050044
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
844 PM EDT SAT AUG 4 2018

PAC077-050615-
/O.EXT.KPHI.FA.W.0046.000000T0000Z-180805T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-
844 PM EDT SAT AUG 4 2018

The National Weather Service in Mount Holly NJ has extended the

* Flood Warning for...
  Central Lehigh County in eastern Pennsylvania...

* Until 215 AM EDT.

* At 840 PM EDT, minor flooding was occurring along the Little 
  Lehigh Creek and some of its tributaries in Lehigh County. The 
  minor flooding along the Little Lehigh is expected to continue 
  with the creek returning back below flood stage after midnight.

* Some locations that may be experiencing minor flooding include... 
  Allentown and Emmaus. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4060 7545 4051 7551 4057 7560 4061 7547

$$

Iovino
614 
WGUS81 KPHI 050346
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
1146 PM EDT SAT AUG 4 2018

PAC077-050355-
/O.CAN.KPHI.FA.W.0046.000000T0000Z-180805T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-
1146 PM EDT SAT AUG 4 2018

...THE FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL LEHIGH
COUNTY...

Flood waters on Little Lehigh Creek and surrounding areas have 
receded, and are no longer expected to pose a threat to life or 
property. Please continue to heed any road closures.

LAT...LON 4060 7545 4051 7551 4057 7560 4061 7547

$$

CMS

What forecasters said that day

The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood warning went out at Aug 3, 9:48 PM EDT, 4 hours 34 minutes earlier.

Area forecast discussion, Aug 3, 9:48 PM EDT, 4 hours 34 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
948 PM EDT Fri Aug 3 2018

.SYNOPSIS...
High pressure will remain south and east of the region
overnight and through the weekend. A low pressure trough will
affect the area tonight and early Saturday. Another trough and
weak front will slide towards the area later Monday and remain
across the area until the middle of next week.

&&

.NEAR TERM /UNTIL 6 AM SATURDAY MORNING/...
The main area of rain was coming together ahead of the mid
level short wave trough this evening. The heavy rain extended
from northern Virginia, across central Maryland to eastern
Pennsylvania around 9:30 PM.

The heavy rain will lift slowly northeastward across our region
during the night. The heaviest rain should be mainly to the
northwest of the Interstate 95 Corridor. A Flash Flood Watch
remains in effect for Berks County, the Lehigh Valley and the
Pocono Region in Pennsylvania, and for northern New Jersey. A
brief period of heavy rain is possible along and to the
southeast of the Interstate 95 Corridor as the tail end of the
precipitation area lifts through that region.

A light south to southwest wind is anticipated overnight. Lows
should range from the upper 60s to the middle 70s.

&&

.SHORT TERM /6 AM SATURDAY MORNING THROUGH 6 PM SATURDAY/...
A cold front works its way through the region during the day
Saturday. Heavy precip begins to taper off late Saturday
morning, but additional showers and possible thunderstorms will
impact eastern zones through the late morning and into the
afternoon. Conditions should begin to clear out over western
zones by midday, and then for eastern zones by late afternoon.

Expect highs generally in the mid to upper 80s except a bit
cooler right along the coast and over the southern Poconos.
Humidity will also remain high with dew points remaining above
70.

&&

.LONG TERM /SATURDAY NIGHT THROUGH FRIDAY/...
Typical summertime weather will remain across the area during
the long term. A high pressure system will continue to pump
humid and very warm air across the area, while occasionally an
upper disturbance or weak surface front will set off showers and
thunderstorms.

The favored time periods for showers and thunderstorms will be
from next Monday night and into the Wed/Thu period as another
upper trough and sfc front meanders across the area. Preceding
this, ample warn and humid air will be in place, so the
possibility for some heavy downpours will be upon us once again.
We have mostly chc pops for the fcst for Tue thru Thu.

Temperatures will be well above normal Sunday and Monday, the
two dry days as an upper ridge will be across the region. Heat
index values during these days will be in the low/mid 90s,so
some limited heat related issues are possible across the urban
areas. After Monday, the added clouds will probably cause
temperatures to fall back closer to normal.

&&

.AVIATION /02Z SATURDAY THROUGH WEDNESDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Overnight...MVFR and IFR at KRDG and KABE with rain, heavy at
times. VFR lowering to MVFR and IFR in moderate to heavy rain at
KILG, KPHL, KPNE and KTTN. VFR lowering to MVFR in light to
moderate rain at KMIV and KACY. Isolated thunder is expected but
it should not be widespread enough to include in the TAFs.
South to southwest wind 8 knots or less.

Saturday...MVFR in the morning with rain ending. Conditions
improving to VFR for the afternoon hours with clearing taking
place at that time. Southwest wind 6 to 12 knots becoming west.

OUTLOOK...
Saturday night thru Monday...Mostly VFR. Patchy fog psbl
   overnight.

Monday night thru Wednesday...Mostly VFR. Sct tstms with lower
   conditions psbl.

&&

.MARINE...
Conditions will be below SCA criteria overnight and into
Saturday morning. SW winds may gust to 25 kt Saturday afternoon,
but confidence is low in that happening at this time.

OUTLOOK...
Sub-SCA expected. Fair weather Sat night thru Monday night. Sct
showers and tstms Tue thru Wed.

RIP CURRENTS...
There is a moderate risk for the development of dangerous rip
currents on Saturday at the New Jersey and Delaware beaches. The
wind should be from the south and southwest around 10 MPH.
Waves in the surf zone are forecast to be around 3 feet with a
moderate period primary swell. However, there should be an
underlying long period swell (around 14 seconds) from the
southeast and that is the main reason for the moderate risk.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flash Flood Watch until 8 AM EDT Saturday for PAZ054-055-
     060>062.
NJ...Flash Flood Watch until 8 AM EDT Saturday for NJZ001-007-008.
DE...None.
MD...None.
MARINE...None.

&&

Synopsis...O'Hara
Near Term...Iovino
Short Term...MPS
Long Term...O'Hara
Aviation...Iovino/O'Hara
Marine...MPS/O'Hara
Hazardous weather outlook, Aug 3, 9:58 PM EDT, 4 hours 24 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
958 PM EDT Fri Aug 3 2018

NJZ001-007-008-PAZ054-055-060>062-050200-
Sussex-Warren-Morris-Carbon-Monroe-Berks-Lehigh-Northampton-
958 PM EDT Fri Aug 3 2018

...FLASH FLOOD WATCH IN EFFECT UNTIL 8 AM EDT SATURDAY...

This Hazardous Weather Outlook is for northern New Jersey, east
central Pennsylvania and northeast Pennsylvania.

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ001>003-MDZ008-012-015-019-020-NJZ009-010-012-013-015>023-027-
PAZ070-071-101>106-050200-
New Castle-Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-
Caroline-Hunterdon-Somerset-Middlesex-Western Monmouth-Mercer-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-Atlantic-
Cape May-Southeastern Burlington-Delaware-Philadelphia-
Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
958 PM EDT Fri Aug 3 2018

This Hazardous Weather Outlook is for central Delaware, northern
Delaware, southern Delaware, northeast Maryland, central New
Jersey, northern New Jersey, northwest New Jersey, southern New
Jersey and southeast Pennsylvania.

.DAY ONE...Tonight.

Scattered showers and isolated thunderstorms may produce very heavy
downpours leading to urban, small stream and poor drainage flooding
in spots.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Heavy showers and isolated thunderstorms will likely continue into
Saturday morning before moving out of the area by afternoon.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ004-NJZ014-024>026-050200-
Delaware Beaches-Eastern Monmouth-Atlantic Coastal Cape May-
Coastal Atlantic-Coastal Ocean-
958 PM EDT Fri Aug 3 2018

This Hazardous Weather Outlook is for southern Delaware, central
New Jersey and southern New Jersey.

.DAY ONE...Tonight.

There is a moderate risk for the development of dangerous rip
currents.

Scattered showers and isolated thunderstorms may produce very heavy
downpours leading to urban and poor drainage flooding in spots.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

There is a moderate risk for the development of dangerous rip
currents on Saturday.

Heavy showers and isolated thunderstorms will likely continue into
Saturday morning before moving out of the area by afternoon.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ430-431-450>455-050200-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
958 PM EDT Fri Aug 3 2018

This Hazardous Weather Outlook is for Atlantic coastal waters and
Delaware Bay Waters.

.DAY ONE...Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

In the hours before

Special weather statement, Aug 4, 12:01 AM EDT, 2 hours 21 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
1201 AM EDT SAT AUG 4 2018

MDZ008-012-015-019-040430-
Queen Anne's-Talbot-Cecil-Kent-
1201 AM EDT SAT AUG 4 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTH CENTRAL TALBOT...
QUEEN ANNE'S...KENT AND SOUTHWESTERN CECIL COUNTIES...

At 1200 AM EDT, radar indicated strong thunderstorms were located
along a line extending from near Rock Hall to Skipton. Movement was
northeast at 40 mph.

Winds up to 45 mph are possible with these storms.

Locations impacted include...
Centerville, Chestertown, Centreville, Rock Hall, Church Hill,
Betterton, Old Town, Starr, Skipton, Langford, Newtown, Starkey
Corner, Wye Mills, Morgnec, Carville, Kennedyville, Hope, Queenstown
and Kingstown.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3926 7622 3929 7617 3932 7618 3934 7616
      3933 7614 3937 7611 3937 7606 3939 7604
      3938 7601 3907 7585 3881 7610 3899 7618
      3900 7617 3902 7620 3917 7627
TIME...MOT...LOC 0400Z 207DEG 33KT 3918 7622 3888 7607

CMS
Special weather statement, Aug 4, 1:15 AM EDT, 1 hour 7 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
115 AM EDT SAT AUG 4 2018

PAZ060-040545-
Berks-
115 AM EDT SAT AUG 4 2018

...A SHOWER WILL AFFECT CENTRAL BERKS COUNTY...

At 114 AM EDT, a shower was located over Spring Ridge, or near
Reading, moving northeast at 25 mph.

Winds up to 40 mph are possible with this shower. With the saturated
ground, trees are especially susceptible to falling even with gusts
well below severe limits.

Locations impacted include...
Reading, Wyomissing, Kutztown, Fleetwood, Sinking Spring, Laureldale,
Wernersville, Topton, Leesport, Shoemakersville, Lyons,
Lenhartsville, Spring Ridge, Fairview Hgts, Shillington, West
Reading, Mount Penn, Mohnton, Kenhorst and St. Lawrence.

Torrential rainfall is also occurring with this shower, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4065 7585 4059 7575 4043 7556 4019 7595
      4031 7614 4035 7618
TIME...MOT...LOC 0514Z 226DEG 23KT 4036 7600

CMS
Local storm report, Aug 4, 1:36 AM EDT, 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
136 AM EDT SAT AUG 04 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 AM     HEAVY RAIN       NORTH CATASAUQUA        40.66N  75.47W
08/04/2018  M2.31 INCH       NORTHAMPTON        PA   METEOROLOGIST

            DAILY RAINFALL TOTAL FOR AUGUST 3, WITH MOST OCCURRING
            WITHIN A TWO-HOUR PERIOD.

&&

EVENT NUMBER PHI1801177

CMS
Local storm report, Aug 4, 1:42 AM EDT, 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
142 AM EDT SAT AUG 04 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0915 PM     TSTM WND DMG     WYOMISSING              40.33N  75.96W
08/03/2018                   BERKS              PA   SOCIAL MEDIA

            SEVERAL REPORTS OF TREES AND WIRES DOWN IN BERKS COUNTY
            FROM EARL TWP THROUGH WYOMISSING AND READING INTO EXETER
            AND RUSCOMBMANOR TOWNSHIPS. GENERAL TIMING FROM 915 PM
            TO 945 PM BASED ON RADAR.

&&

EVENT NUMBER PHI1801178

CMS
Special weather statement, Aug 4, 1:47 AM EDT, 35 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
147 AM EDT SAT AUG 4 2018

PAZ060>062-040630-
Lehigh-Northampton-Berks-
147 AM EDT SAT AUG 4 2018

...A LINE OF SHOWERS WILL AFFECT EASTERN BERKS...LEHIGH AND WEST
CENTRAL NORTHAMPTON COUNTIES...

At 145 AM EDT, radar indicated showers were located along a line
extending from near New Tripoli to near Reading. Movement was
northeast at 45 mph.

Winds up to 40 mph are possible with these showers. With the
saturated ground, a few trees may fall even though these gusts are
well below severe levels.

Locations impacted include...
Allentown, Reading, Bethlehem, Emmaus, Wyomissing, Northampton,
Kutztown, Slatington, Fleetwood, Laureldale, Bath, Walnutport,
Topton, Leesport, Shoemakersville, Lyons, Lenhartsville, Neffs,
Coffeetown and New Tripoli.

Torrential rainfall is also occurring with these showers, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4053 7599 4079 7562 4081 7554 4081 7550
      4083 7542 4083 7538 4085 7534 4059 7542
      4019 7597 4022 7600
TIME...MOT...LOC 0545Z 223DEG 39KT 4063 7576 4027 7593

CMS
Local storm report, Aug 4, 2:05 AM EDT, 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
205 AM EDT SAT AUG 04 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0138 AM     FLASH FLOOD      1 E SOUTH HEIDELBERG TW 40.31N  76.08W
08/04/2018                   BERKS              PA   SOCIAL MEDIA

            A PARTIAL COLLAPSE OF A STRUCTURE OCCURRED AS A RESULT
            OF A BASEMENT WALL COLLAPSE FROM FLOOD WATERS.

&&

EVENT NUMBER PHI1801179

CMS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 8:35 PM EDTAreal Flood AdvisoryPHICarbon4 hr
Aug 3, 9:03 PM EDTFlash Flood WarningPHIBerks8 hr
Aug 3, 9:10 PM EDTAreal Flood AdvisoryPHIMonroe, Northampton4 hr
Aug 3, 10:07 PM EDTSpecial Weather StatementPHILehigh, Northampton53 min
Aug 3, 10:23 PM EDTFlash Flood WarningPHILehigh, Northampton4 hr
Aug 3, 11:24 PM EDTAreal Flood AdvisoryPHIBerks, Lehigh6 hr
Aug 4, 12:24 AM EDTAreal Flood AdvisoryPHICarbon4 hr
Aug 4, 1:08 AM EDTAreal Flood AdvisoryPHIMonroe4 hr
Aug 4, 1:15 AM EDTSpecial Weather StatementPHIBerks30 min
Aug 4, 1:47 AM EDTSpecial Weather StatementPHIBerks, Lehigh43 min
Aug 4, 1:59 AM EDTAreal Flood AdvisoryPHIChester4 hr
Aug 4, 2:27 AM EDTSpecial Weather StatementPHILehigh, Northampton63 min
Aug 4, 4:54 AM EDTAreal Flood WarningPHIBerks7 hr
Aug 4, 5:09 AM EDTAreal Flood AdvisoryPHIMonroe2 hr
Aug 4, 5:45 AM EDTAreal Flood AdvisoryPHIBucks, Chester, Montgomery7 hr
Aug 4, 6:45 AM EDTRiver Flood WarningPHIChester4 hr
Aug 4, 6:55 AM EDTAreal Flood AdvisoryPHIBucks, Montgomery4 hr
Aug 4, 8:48 AM EDTAreal Flood WarningPHIChester, Montgomery4 hr
Aug 4, 9:20 AM EDTRiver Flood WarningPHIMontgomery3 hr
Aug 4, 11:55 AM EDTRiver Flood WarningPHIChester, Montgomery, Philadelphia12 hr
Aug 4, 4:41 PM EDTSevere Thunderstorm WarningPHINorthampton34 min

Nearby

Areal Flood Warnings in Pennsylvania, 2018Every areal flood warning in 2018

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.