Alert archive / Pennsylvania / Areal Flood Warnings in 2018

Areal Flood Warning 58, NWS Philadelphia/Mount Holly

August 13, 2018Burlington County, Camden County, New Jersey; 7 counties in Pennsylvania; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this areal flood warning at Aug 13, 2018, 12:37 PM EDT for Burlington County, Camden County, New Jersey; 7 counties in Pennsylvania; New Castle County, Delaware. It was in force for 18 hr. 15 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 13, 2018, 12:37 PM EDT (16:37 UTC)
Expired
Aug 14, 2018, 6:52 AM EDT
In force
18 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 110 km from the middle of the area, began a volume at 16:37 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 13, 1:57 PM EDTHEAVY RAIN 3Springfield, PA
Aug 13, 3:22 PM EDTHEAVY RAIN 4.851 Sw Williams, PA24-HOUR RAINFALL.
Aug 13, 4:10 PM EDTFLOODPhoenixville, PAWATER RESCUE OF TEENAGER STRANDED IN PICKERING CREEK IN PHOENIXVILLE.
Aug 13, 4:44 PM EDTHEAVY RAIN 5.591 S Claussville, PA
Aug 13, 4:59 PM EDTHEAVY RAIN 4.312 Sse Slatington, PA
Aug 13, 5:05 PM EDTHEAVY RAIN 4.11North Whitehall Twp, PA
Aug 13, 5:13 PM EDTFLOOD1 Sse Berkley, PAWATER RESCUE IN PROGRESS ON LEESPORT AVENUE NEAR OESTERLING DRIVE.
Aug 13, 5:35 PM EDTFLOOD1 Nnw Ancient Oaks, PASPRING CREEK ROAD AND SHASTA ROAD FLOODED IN LOWER MACUNGIE TOWNSHIP DUE TO THE LITTLE LEHIGH RIVER OUT OF ITS BANKS.
Aug 13, 5:47 PM EDTHEAVY RAIN 2.731 Sw Newhard, PA
Aug 13, 6:36 PM EDTHEAVY RAIN 2.2Blandon, PA
Aug 13, 6:36 PM EDTHEAVY RAIN 2.4Blandon, PA
Aug 13, 7:35 PM EDTFLOOD1 Sw Freemanville, PASTATE HIGHWAY 625 IS CLOSED BETWEEN CHURCH HILL ROAD AND FREEMANSVILLE ROAD IN CUMRU TOWNSHIP. THE CUMRU TOWNSHIP POLICE DEPARTMENT REPORTS THE ROAD IS WASHING AWAY AT NOBLE PARK ROAD. TREES AND WIRES ARE DOWN WHERE THE FLOODING IS OCCURRING AS WELL.
Aug 13, 9:35 PM EDTFLOODChadds Ford, PAFLOODING ON U.S. HIGHWAY 1 BETWEEN CREEK ROAD AND FAIRVILLE ROAD. LANE RESTRICTIONS IN PLACE.
Aug 13, 10:17 PM EDTFLOODPerkiomen, PAWATER RESCUE IN PROGRESS AT BROWER ROAD NEAR THE SCHUYLKILL RIVER TRAIL ACCESS POINT.
Aug 13, 10:35 PM EDTFLOODChatwood, PAFLOODING ON MONTGOMERY AVENUE BETWEEN GAY STREET AND CHESTNUT STREET. 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 4.6 hours before the alert went out and 205 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, Washington/Dulle, VA at 12:00Z on 2018-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 714 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, Washington/Dulle, VA at 12:00Z on 2018-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.1939587897Sfc1 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
714 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
644 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

543 
WGUS41 KPHI 131637
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
1237 PM EDT MON AUG 13 2018

DEC003-NJC005-007-PAC011-017-029-045-077-091-101-132230-
/O.NEW.KPHI.FA.W.0058.180813T1637Z-180813T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Camden NJ-Burlington NJ-Berks PA-Montgomery PA-
Lehigh PA-Bucks PA-Chester PA-Philadelphia PA-Delaware PA-
1237 PM EDT MON AUG 13 2018

The National Weather Service in Mount Holly NJ has issued a

* Flood Warning for Urban Areas and Small Streams in...
  Northern New Castle County in northern Delaware...
  Northwestern Camden County in southern New Jersey...
  West central Burlington County in southern New Jersey...
  Berks County in eastern Pennsylvania...
  Montgomery County in southeastern Pennsylvania...
  Lehigh County in eastern Pennsylvania...
  Northwestern Bucks County in southeastern Pennsylvania...
  Chester County in southeastern Pennsylvania...
  Philadelphia County in southeastern Pennsylvania...
  Delaware County in southeastern Pennsylvania...

* Until 630 PM EDT.

* At 1231 PM EDT, although the heavy rain has ended, numerous road 
  closures from ongoing flooding continues in southeastern 
  Pennsylvania and northern Delaware. Additionally, many gauges in 
  the area rivers and streams are still above flood stage with some 
  of the larger basins still rising in response to the excess runoff 
  from the heavy rain that fell this morning. Flooding will continue 
  this afternoon in some of the hardest hit areas.

* Some locations that could experience flooding include...
  Philadelphia, Allentown, Reading, Camden, Wilmington, Newark, West
  Chester, Gloucester City, Bethlehem, Norristown, Chester,
  Pottstown, Phoenixville, Lansdale, West Norriton, East Norriton,
  Coatesville, Yeadon, Emmaus and Westtown.

The heaviest rain fell just west of I-476 in northeast Delaware 
County and western Montgomery County in southeastern Delaware where 
radar and automated gauges indicate 4 to 6 inches of rain fell this 
morning. Several areas in Chester and Berks County also received 2 
to 4 inches of rain. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

&&

LAT...LON 4049 7643 4057 7602 4065 7598 4079 7561
      4074 7559 4063 7539 4058 7541 4054 7534
      4028 7529 4010 7502 4001 7494 3994 7495
      3984 7536 3959 7563 3959 7577 3972 7579
      3977 7606 3987 7599 4011 7594 4014 7588

$$

Klein
7 follow-up statements
284 
WGUS81 KPHI 132222
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
622 PM EDT MON AUG 13 2018

DEC003-NJC005-007-PAC017-101-132225-
/O.CAN.KPHI.FA.W.0058.000000T0000Z-180813T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Camden NJ-Burlington NJ-Bucks PA-Philadelphia PA-
622 PM EDT MON AUG 13 2018

...THE FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS HAS BEEN
CANCELLED FOR NORTHERN NEW CASTLE...NORTHWESTERN CAMDEN...WEST
CENTRAL BURLINGTON...NORTHWESTERN BUCKS AND PHILADELPHIA COUNTIES...

The heavy rain has ended and flood waters are receding. Therefore, 
this flood warning has been cancelled. Separate river flood warnings 
remain up for portions of the Brandywine River, East Branch 
Brandywine River, and the Perkiomen Creek. These specific bodies of 
water continue to flood.

LAT...LON 4057 7602 4065 7598 4079 7561 4074 7559
      4069 7550 4066 7548 4067 7546 4063 7539
      4048 7548 4027 7548 4016 7534 4008 7518
      4009 7522 4006 7526 4001 7521 3987 7539
      4015 7585 4030 7603

$$

PAC011-029-045-077-091-132230-
/O.CON.KPHI.FA.W.0058.000000T0000Z-180813T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-Montgomery PA-Lehigh PA-Chester PA-Delaware PA-
622 PM EDT MON AUG 13 2018

...A FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS REMAINS IN
EFFECT UNTIL 630 PM EDT FOR BERKS...WESTERN MONTGOMERY...LEHIGH...
NORTHEASTERN CHESTER AND CENTRAL DELAWARE COUNTIES...

At 615 PM EDT, although the heavy rain has ended, road closures from 
ongoing flooding continue across portions of southeastern 
Pennsylvania, including in Lehigh County where both Spring Creek 
Road and Lower Macungie Road are closed. 

The heaviest rain today fell just west of I-476 in northeast 
Delaware County and western Montgomery County as well as across 
portions of Lehigh County. Up to 6 inches rain fell this morning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4057 7602 4065 7598 4079 7561 4074 7559
      4069 7550 4066 7548 4067 7546 4063 7539
      4048 7548 4027 7548 4016 7534 4008 7518
      4009 7522 4006 7526 4001 7521 3987 7539
      4015 7585 4030 7603

$$

Kruzdlo
925 
WGUS41 KPHI 132229
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
629 PM EDT MON AUG 13 2018

PAC011-029-045-077-091-140230-
/O.EXT.KPHI.FA.W.0058.000000T0000Z-180814T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-Montgomery PA-Lehigh PA-Chester PA-Delaware PA-
629 PM EDT MON AUG 13 2018

The National Weather Service in Mount Holly NJ has extended the

* Flood Warning for Urban Areas and Small Streams in...
  Berks County in eastern Pennsylvania...
  Western Montgomery County in southeastern Pennsylvania...
  Lehigh County in eastern Pennsylvania...
  Northeastern Chester County in southeastern Pennsylvania...
  Central Delaware County in southeastern Pennsylvania...

* Until 1030 PM EDT.

* At 623 PM EDT, although the heavy rain has ended, road closures 
  from ongoing flooding continue across portions of southeastern 
  Pennsylvania, including in Lehigh County where both Spring Creek 
  Road and Lower Macungie Road are closed. 

The heaviest rain today fell just west of I-476 in northeast 
Delaware County and western Montgomery County as well as across 
portions of Lehigh County. Up to 6 inches of rain fell this morning. 

Besides this warning, specific flood warnings have been issued 
across southeast Pennsylvania for the Perkiomen Creek, the 
Schuylkill River, Brandywine Creek, and the East Branch Brandywine 
Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4057 7602 4065 7598 4079 7561 4074 7559
      4069 7550 4066 7548 4067 7546 4063 7539
      4048 7548 4027 7548 4016 7534 4008 7518
      4009 7522 4006 7526 4001 7521 3987 7539
      4015 7585 4030 7603

$$

Kruzdlo
153 
WGUS81 KPHI 140158
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
958 PM EDT MON AUG 13 2018

PAC011-029-045-091-140203-
/O.CAN.KPHI.FA.W.0058.000000T0000Z-180814T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-Montgomery PA-Chester PA-Delaware PA-
958 PM EDT MON AUG 13 2018

...THE FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS HAS BEEN
CANCELLED FOR BERKS...WESTERN MONTGOMERY...NORTHEASTERN CHESTER AND
CENTRAL DELAWARE COUNTIES...

The heavy rain has ended. This Urban and Small Stream Flood Warning 
has been cancelled. Specific river flood warnings remain up for 
portions of the Schuylkill River.

LAT...LON 4079 7561 4076 7561 4074 7559 4069 7550
      4066 7548 4067 7546 4063 7539 4050 7552
      4056 7562 4070 7583

$$

PAC077-140230-
/O.CON.KPHI.FA.W.0058.000000T0000Z-180814T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-
958 PM EDT MON AUG 13 2018

...A FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS REMAINS IN
EFFECT UNTIL 1030 PM EDT FOR CENTRAL LEHIGH COUNTY...

At 953 PM EDT, although the heavy rain has ended, road closures from 
ongoing flooding continue across portions of Lehigh County. Water 
continues to run high on the Lehigh and Little Lehigh.  

The heaviest rain today fell just west of I-476 in northeast 
Delaware County and western Montgomery County as well as across 
portions of Lehigh County. Up to 6 inches of rain fell this morning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4079 7561 4076 7561 4074 7559 4069 7550
      4066 7548 4067 7546 4063 7539 4050 7552
      4056 7562 4070 7583

$$

Kruzdlo
839 
WGUS41 KPHI 140203
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
1003 PM EDT MON AUG 13 2018

PAC077-140630-
/O.EXT.KPHI.FA.W.0058.000000T0000Z-180814T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-
1003 PM EDT MON AUG 13 2018

The National Weather Service in Mount Holly NJ has extended the

* Flood Warning for Urban Areas and Small Streams in...
  Central Lehigh County in eastern Pennsylvania...

* Until 230 AM EDT.

* At 959 PM EDT, although the heavy rain has ended, road closures 
  from ongoing flooding continue across portions of Lehigh County. 
  Water continues to run high and fast on the Lehigh and Little 
  Lehigh. 
  
The heaviest rain today fell just west of I-476 in northeast 
Delaware County and western Montgomery County as well as across 
portions of Lehigh County. Up to 6 inches of rain fell this morning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4079 7561 4076 7561 4074 7559 4069 7550
      4066 7548 4067 7546 4063 7539 4050 7552
      4056 7562 4070 7583

$$

Kruzdlo
912 
WGUS41 KPHI 140535
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
135 AM EDT TUE AUG 14 2018

PAC077-141230-
/O.EXT.KPHI.FA.W.0058.000000T0000Z-180814T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-
135 AM EDT TUE AUG 14 2018

The National Weather Service in Mount Holly NJ has extended the

* Flood Warning for Urban Areas and Small Streams in...
  Central Lehigh County in eastern Pennsylvania...

* Until 830 AM EDT Tuesday.

* At 130 AM EDT, small streams and creeks continued to run high in 
  Lehigh County with some minor flooding taking place. The Little 
  Lehigh Creek remained out of its banks in spots. The minor 
  flooding is due to runoff from Monday's heavy rain.

* Water levels are expected to fall slowly this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4079 7561 4076 7561 4074 7559 4069 7550
      4066 7548 4067 7546 4063 7539 4050 7552
      4056 7562 4070 7583

$$

Iovino
077 
WGUS81 KPHI 140830
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
430 AM EDT TUE AUG 14 2018

PAC077-141230-
/O.CON.KPHI.FA.W.0058.000000T0000Z-180814T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-
430 AM EDT TUE AUG 14 2018

...A FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS REMAINS IN
EFFECT UNTIL 830 AM EDT FOR CENTRAL LEHIGH COUNTY...

At 425 AM EDT, small streams and creeks continued to run high in 
Lehigh County with some minor flooding taking place. The Little 
Lehigh Creek remained out of its banks in spots. The minor flooding 
is due to runoff from Monday's heavy rain. Water levels are expected 
to continue falling this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4070 7564 4069 7550 4066 7548 4067 7546
      4063 7539 4050 7552 4056 7562 4063 7572

$$

Iovino
326 
WGUS81 KPHI 141052
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
652 AM EDT TUE AUG 14 2018

PAC077-141101-
/O.CAN.KPHI.FA.W.0058.000000T0000Z-180814T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lehigh PA-
652 AM EDT TUE AUG 14 2018

...THE FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS HAS BEEN
CANCELLED FOR CENTRAL LEHIGH COUNTY...

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

LAT...LON 4070 7564 4069 7550 4066 7548 4067 7546
      4063 7539 4050 7552 4056 7562 4063 7572

$$

Iovino

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 13, 9:51 AM EDT, 2 hours 46 minutes earlier.

Area forecast discussion, Aug 13, 9:51 AM EDT, 2 hours 46 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
951 AM EDT Mon Aug 13 2018

.SYNOPSIS...
A frontal boundary is expected to move little through Tuesday
as weak areas of low pressure ride along it. The boundary is
forecast to push farther off the coast on Wednesday. Low
pressure is anticipated to move across the Great Lakes and into
the northeastern states late in the week and it should pull a
cold front through our region on Friday night. The front may
begin to drift back to the north over the weekend.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
An area of showers with embedded thunderstorms continues to
slowly push northward through the region this morning.
Torrential rainfall is occurring with this cluster of storms and
flash flooding is occurring. Do not drive into flood waters!

Reports of 3 to 5 inches of rainfall have occurred with this
mornings rainfall and any additional rainfall in these areas
this afternoon/evening will lead to more flooding concerns.

Behind the mass of storms, there is some clearing occurring
which will only help to destabilize the atmosphere for this
afternoon.

Previous discussion...
Weather over the mid-Atlantic region will continue to be
influenced by an upper low now located near the SW corner of PA.
A trof axis appears to extend south from the low through the
western Carolinas. Otherwise the various smaller-scale features
rotating around the low are not very well defined. A band of
stronger convection has developed from the upper Chesapeake Bay
northward through the lower and middle Susquehanna Valley,
possibly in association with a developing upper-level jet streak
across that area. Individual storms are not moving much due to
weaker low-level winds, and so far they are mostly staying just
west of our forecast area, but will need to be watched closely.

With daytime heating and de-stabilization, convection is
expected to increase in coverage as we continue into the
afternoon. Given PWATs somewhat above normal, slow-moving storms
and wet antecedent conditions, the threat for localized
flooding is significant and the flash flood watch remains in
effect for areas generally along and NW of the I-95/I-295
corridor. Temperatures today should be similar to yesterday with
a very warm and humid air mass remaining over the area.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM TUESDAY/...
For tonight, the upper low is forecast to begin a slow NE
movement, but our area remains in S/SW flow aloft ahead of it.
Fairly widespread convection may be ongoing in the evening as
low pressure moves slowly NE along a frontal boundary across the
area. Convection should diminish through late evening and
overnight with loss of instability and likely also larger scale
UVV. However any storms lingering into the evening could still
produce heavy rains and flooding.

&&

.LONG TERM /TUESDAY THROUGH SUNDAY/...
After stalling near the PA-OH border for 24+ hours, the upper
low is forecast to lift NE toward the lower/mid-Hudson Valley
Tuesday (passing just to our N). At the surface, the same
stationary front parked over our area this weekend is expected
to remain either over eastern portions of our area (I-95/coastal
plain) or just offshore during this time. The exact position of
this front will depend on strength, timing and track of a weak
wave of low pressure that is forecast to track NE along the
boundary. Large-scale lift ahead of the upper low and downstream
upper level jet streak will keep showers and storms in our area
on Tuesday. The axis of heavy rainfall would most likely occur
along and just west of the surface front as convergence along
this boundary could help focus convective development. However,
less than ideal model agreement regarding the evolution of the
surface low and frontal boundary makes it difficult to fully
assess and provide details about the heavy rainfall potential
for the first period of the long term.

A brief respite from this extended unsettled/wet weather
pattern that we are currently in is expected in wake of the
upper trough passage Tuesday night through Thursday morning. The
next upper shortwave trough and surface low is expected to move
E-NE across the Midwest-Great Lakes regions late in the week
and then through the Northeast states next weekend. Chances for
showers and storms return to the forecast from late Thursday
through Sunday as we remain under the influence of this
disturbance. Greater convective coverage seems possible on
Friday given the timing of the synoptic cold front.

Highs each day will generally be in the mid 80s which is near
normal for mid August. The exception will be Thursday and
Friday, with highs in the upper 80s and lower 90s as pre-frontal
warm sector becomes established in the Mid Atlantic.

&&

.AVIATION /14Z MONDAY THROUGH FRIDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

This morning...SHowers and thunderstorms with very heavy
rainfall continue to move through the area this morning. A
gradual end from south to north will occur through late
morning/early afternoon. Conditions are improving to VFR behind
the main cluster of storms with some IFR/MVFR conditions mainly
towards KMIV/KACY. Expect all terminals to become VFR by this
afternoon. Winds are generally out of the east/northeast but in
and around the storms a shift to eh west/northwest is noted.
Winds will briefly turn W/NW before becoming light out of the N
then E/NE by this afternoon.

This afternoon...Showers and t-storms will become more
widespread during the day resulting in locally reduced CIGs and
VSBYs. Winds will be easterly but under 10 kt.

Tonight...Mainly VFR conditions are expected with light and
variable winds. Showers and t-storms may continue into the
evening with locally reduced CIGs and/or VSBYs.

OUTLOOK...
Tuesday and Tuesday evening...Variable conditions with showers
likely along with scattered thunderstorms. The rain may be heavy
at times. Southwest to west wind less than 10 knots.

Tuesday night and early Wednesday morning...Some visibility
restrictions are possible in fog and haze. West wind less than
10 knots.

Late Wednesday morning and Wednesday afternoon......Mainly VFR.
Northwest to west wind less than 10 knots.

Wednesday night and Thursday...Mainly VFR. Late night and early
morning visibility restrictions are possible. A chance of
afternoon showers and thunderstorms, mainly around KRDG and
KABE. West to southwest wind less than 10 knots.

Thursday night and Friday...Mainly VFR. Late night and early
morning visibility restrictions are possible. A chance of
afternoon showers and thunderstorms. Southwest wind less than 10
knots.

&&

.MARINE...
Sub-SCA conditions should continue through tonight. Winds today
will veer around from ENE to S as low pressure moves NE along a
frontal boundary, then becoming SW tonight. Wave heights will
be generally 3 to 4 feet with a southerly swell.

OUTLOOK...
Tuesday through Friday...No marine headlines are anticipated.

RIP CURRENTS...
There is a low risk for the development of dangerous rip
currents today.

The wind is forecast to be from the southwest and south on
Tuesday around 10 MPH. Wave heights should be 2 to 3 feet on the
waters off New Jersey and Delaware with a medium period swell.
As a result, we are anticipating a low risk for the development
of dangerous rip currents at that time.

&&

.TIDES/COASTAL FLOODING...
In addition to any heavy rain that falls, we are expecting
spotty minor coastal flooding with this evening's high tide. It
will be due mainly to the high astronomical tides associated
with the new moon. However, the flooding due to the tides is not
anticipated to be widespread enough to warrant another Coastal
Flood Advisory.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flash Flood Watch through this evening for PAZ054-055-060>062-
     070-071-101>106.
NJ...Flash Flood Watch through this evening for NJZ001-007>010-012-
     013-015>019.
DE...Flash Flood Watch through this evening for DEZ001.
MD...Flash Flood Watch through this evening for MDZ008.
MARINE...None.

&&

Synopsis...Iovino
Near Term...AMC/Meola
Short Term...AMC
Long Term...Klein
Aviation...AMC/Iovino/Meola
Marine...AMC/Iovino
Tides/Coastal Flooding...
Hazardous weather outlook, Aug 13, 5:06 AM EDT, 7 hours 31 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
506 AM EDT Mon Aug 13 2018

DEZ001-MDZ008-NJZ001-007>010-012-013-015>019-PAZ054-055-060>062-070-
071-101>106-140915-
New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Mercer-Salem-Gloucester-Camden-
Northwestern Burlington-Carbon-Monroe-Berks-Lehigh-Northampton-
Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
506 AM EDT Mon Aug 13 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

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

.DAY ONE...Today and 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...Tuesday through Sunday.

There is the potential for isolated heavy rain and localized
flooding on Tuesday.

.SPOTTER INFORMATION STATEMENT...

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

DEZ002>004-MDZ012-015-019-020-NJZ014-020>027-140915-
Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot-
Caroline-Eastern Monmouth-Ocean-Cumberland-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean-
Southeastern Burlington-
506 AM EDT Mon Aug 13 2018

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

.DAY ONE...Today and Tonight.

Heavy downpours with any showers and thunderstorms could lead to
localized flooding given the wet antecedent conditions and slow storm
motion.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

There is the potential for isolated heavy rain and localized
flooding on Tuesday.

.SPOTTER INFORMATION STATEMENT...

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

ANZ430-431-450>455-140915-
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-
506 AM EDT Mon Aug 13 2018

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

.DAY ONE...Today and Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

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

Local storm report, Aug 13, 11:34 AM EDT, 1 hour 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1134 AM EDT MON AUG 13 2018

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

1126 AM     FLOOD            MOORESTOWN              39.97N  74.94W
08/13/2018                   BURLINGTON         NJ   TRAINED SPOTTER

            WIDESPREAD STREET FLOODING ALONG MAIN STREET AND ROUTE
            38 IN MOORESTOWM. SOME AREAS ARE IMPASSABLE. ONE INCH OF
            RAIN HAS FALLEN IN THE LAST HALF HOUR.

&&

EVENT NUMBER PHI1801311

STAARMANN
Local storm report, Aug 13, 11:46 AM EDT, 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1146 AM EDT MON AUG 13 2018

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

1120 AM     HEAVY RAIN       RICHMOND TWP            40.48N  75.82W
08/13/2018  M3.76 INCH       BERKS              PA   SOCIAL MEDIA

            RAINFALL SINCE 0500 AM THIS MORNING.

&&

EVENT NUMBER PHI1801312

DAVIS
Local storm report, Aug 13, 12:14 PM EDT, 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1214 PM EDT MON AUG 13 2018

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

0835 AM     HEAVY RAIN       2 SSE DANCEYS CORNER    39.68N  75.43W
08/13/2018  M2.06 INCH       SALEM              NJ   TRAINED SPOTTER

            2 HOUR TOTAL.

&&

EVENT NUMBER PHI1801313

STAARMANN
Local storm report, Aug 13, 12:27 PM EDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1227 PM EDT MON AUG 13 2018

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

0810 AM     FLOOD            WYOMISSING              40.33N  75.96W
08/13/2018                   BERKS              PA   EMERGENCY MNGR

            EMERGENCY MANAGEMENT REPORTS FLOODED ROADWAYS IN
            NUMEROUS AREAS THROUGHOUT BERKS COUNTY. SOME INCIDENTS
            INVOLVE STRANDED MOTORISTS.

&&

EVENT NUMBER PHI1801314

STAARMANN
Local storm report, Aug 13, 12:31 PM EDT, 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1231 PM EDT MON AUG 13 2018

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

1021 AM     HEAVY RAIN       HOWELL                  40.19N  74.20W
08/13/2018  M2.69 INCH       MONMOUTH           NJ   TRAINED SPOTTER

            STORM TOTAL RAINFALL.

&&

EVENT NUMBER PHI1801315

STAARMANN
Local storm report, Aug 13, 12:36 PM EDT, 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1236 PM EDT MON AUG 13 2018

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

1122 AM     FLASH FLOOD      1 NNW ANCIENT OAKS      40.54N  75.59W
08/13/2018                   LEHIGH             PA   TRAINED SPOTTER

            LITTLE LEHIGH CREEK IS OUT OF ITS BANKS MAKING SPRING
            CREEEK ROAD IMPASSABLE. A BRIDGE NEAR THE HEADWATERS IS
            ALSO IMPASSABLE AND SUBMERGED IN FLOOD WATERS. 4.3
            INCHES OF RAIN HAS FALLEN IN THE LAST 3 HOURS.

&&

EVENT NUMBER PHI1801316

STAARMANN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 10:08 PM EDTFlash Flood WatchPHIBurlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 6 more24 hr
Aug 13, 6:10 AM EDTAreal Flood AdvisoryPHIBurlington, Ocean4 hr
Aug 13, 8:03 AM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Salem4 hr
Aug 13, 8:30 AM EDTFlash Flood WarningPHIBurlington, Monmouth, Ocean7 hr
Aug 13, 9:14 AM EDTAreal Flood AdvisoryPHIGloucester, Salem4 hr
Aug 13, 9:32 AM EDTSpecial Marine WarningPHI58 min
Aug 13, 10:27 AM EDTFlash Flood WarningPHIBurlington, Camden2 hr
Aug 13, 10:35 AM EDTSpecial Marine WarningPHI85 min
Aug 13, 10:48 AM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth, Somerset4 hr
Aug 13, 11:38 AM EDTAreal Flood AdvisoryPHIBurlington3 hr
Aug 13, 3:19 PM EDTAreal Flood WarningPHIMonmouth, Ocean6 hr
Aug 13, 4:42 AM EDTAreal Flood AdvisoryPHIBerks4 hr
Aug 13, 5:12 AM EDTAreal Flood AdvisoryPHIChester103 min
Aug 13, 6:24 AM EDTAreal Flood AdvisoryPHIBerks, Chester, Delaware, Montgomery4 hr
Aug 13, 6:50 AM EDTFlash Flood WarningPHIBerks, Chester, Delaware, Montgomery6 hr
Aug 13, 8:43 AM EDTFlash Flood WarningPHIBucks, Delaware, Lehigh, Montgomery, Northampton, Philadelphia4 hr
Aug 13, 9:21 AM EDTRiver Flood WarningPHIChester10 hr
Aug 13, 10:40 AM EDTAreal Flood AdvisoryPHICarbon, Monroe, Northampton42 min
Aug 13, 11:05 AM EDTRiver Flood WarningPHIChester, Delaware30 hr
Aug 13, 11:21 AM EDTAreal Flood WarningPHICarbon, Monroe, Northampton4 hr
Aug 13, 12:14 PM EDTRiver Flood WarningPHIBerks, Montgomery23 hr
Aug 13, 12:14 PM EDTRiver Flood WarningPHIMontgomery28 hr
Aug 13, 12:14 PM EDTRiver Flood WarningPHIChester, Montgomery, Philadelphia52 hr
Aug 13, 3:07 PM EDTRiver Flood WarningPHIMontgomery6 hr
Aug 13, 4:57 PM EDTAreal Flood AdvisoryPHICarbon, Monroe, Northampton3 hr
Aug 13, 5:09 PM EDTRiver Flood WarningPHIMontgomery, Philadelphia31 hr
Aug 13, 7:27 PM EDTAreal Flood WarningPHICarbon, Northampton7 hr
Aug 13, 7:42 PM EDTSevere Thunderstorm WarningPHIChester48 min
Aug 13, 8:20 AM EDTRiver Flood WarningPHINew Castle7 hr
Aug 13, 8:28 AM EDTRiver Flood WarningPHINew Castle6 hr
Aug 13, 9:05 AM EDTRiver Flood WarningPHINew Castle6 hr

Nearby

Areal Flood Warnings in Pennsylvania, 2018Areal Flood Warnings in New Jersey, 2018Areal Flood Warnings in Delaware, 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.