Alert archive / Maryland / River Flood Warnings in 2018

River Flood Warning 25, NWS Philadelphia/Mount Holly

July 25, 2018Cecil County, Harford County, Maryland

NWS Philadelphia/Mount Holly issued this river flood warning at Jul 25, 2018, 8:16 PM EDT for Cecil County, Harford County, Maryland. It took effect at Jul 26, 2018, 5:04 AM EDT. It was in force for 47 hr.

The area

The outline as issued.

The facts

Issued
Jul 25, 2018, 8:16 PM EDT (00:16 UTC)
In effect from
Jul 26, 2018, 5:04 AM EDT
Expired
Jul 28, 2018, 3:57 AM EDT
In force
47 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
Moderate

Counties Cecil County, MD, Harford County, MD

The river

Written for the forecast point Susquehanna River at Conowingo Dam (CNWM2).

Action stage
21.5 ft
Minor stage
23.5 ft
Moderate stage
24.8 ft
Major stage
28.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01578310, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

The text

As transmitted.

085 
WGUS41 KPHI 260016
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mt Holly NJ
816 PM EDT Wed Jul 25 2018

...The National Weather Service in Mount Holly NJ has issued a flood warning for
the following rivers in Maryland...

  Susquehanna Below Conowingo Dam affecting Cecil and Harford Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. The water may be
deeper than you think.

&&

MDC015-025-260615-
/O.NEW.KPHI.FL.W.0025.180726T0904Z-000000T0000Z/
/CNWM2.2.ER.180726T0904Z.180728T0000Z.000000T0000Z.NO/
816 PM EDT Wed Jul 25 2018

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The Susquehanna at Conowingo Dam.
* from late tonight until further notice...Or until the warning is cancelled.
* At  7:30 PM Wednesday the stage was 22.9 feet.
* Flood stage is 23.5 feet.
* Moderate flooding is forecast.
* Forecast...Continue to rise to near 25.6 feet by Friday early afternoon.
* Impact...At 24.8 feet...Backyards and basements on Main Street and Tome's 
  Landing begin to flood.
* Flood history...This crest compares to a previous crest of 26.2 feet on Mar 23 
  1994.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Susquehanna River
  Conowingo Dam          23.5   22.87  Wed 7 PM    26.2    Fri 8 PM 
 
&&
 
LAT...LON 3966 7622 3968 7616 3955 7604 3952 7611
                                      

$$
9 follow-up statements
884 
WGUS81 KPHI 260326
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
1126 PM EDT Wed Jul 25 2018

...The Flood Warning continues for the Susquehanna River below
   Conowingo Dam...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas.
The water may be deeper than you think it is.

&&

MDC015-025-261325-
/O.EXT.KPHI.FL.W.0025.180726T1003Z-000000T0000Z/
/CNWM2.2.ER.180726T1003Z.180728T0000Z.000000T0000Z.NO/
1126 PM EDT Wed Jul 25 2018

The Flood Warning continues for
  The Susquehanna below Conowingo Dam.
* Until further notice.
* At 10:30 PM Wednesday the river level was 22.92 feet.
* Flood stage is 23.5 feet.
* Moderate flooding is forecast.
* Forecast...Continue rising to near 26.2 feet by Friday evening.
* Impact...At 24.8 feet...Backyards and basements on Main Street
  and Tome's Landing in Port Deposit begin to flood.
* Flood history...This crest compares to a previous crest of
  26.2 feet on Mar 23 1994.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Susquehanna River
  Conowingo Dam         23.5   22.92  Wed 1030 PM  26.2   Fri 8 PM 
 
&&
 
LAT...LON 3966 7622 3968 7616 3955 7604 3952 7611
                                      
$$

Iovino
925 
WGUS81 KPHI 260950
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
550 AM EDT Thu Jul 26 2018

...The Flood Warning continues for the Susquehanna River below
Conowingo Dam...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas.
The water may be deeper than you think it is.

&&

MDC015-025-261949-
/O.EXT.KPHI.FL.W.0025.180726T1259Z-000000T0000Z/
/CNWM2.2.ER.180726T1259Z.180727T1200Z.000000T0000Z.NO/
550 AM EDT Thu Jul 26 2018

The Flood Warning continues for
  The Susquehanna River below Conowingo Dam.
* Until further notice.
* At 5:30 AM, the river level was 23.06 feet.
* Flood stage is 23.5 feet.
* Moderate flooding is forecast.
* Forecast...Continue to rise to near 26.4 feet by Friday morning.
* Impact...At 24.8 feet...Backyards and basements on Main Street
  and Tome's Landing in Port Deposit begin to flood.
* Flood history...This crest compares to a previous crest of 26.2
  feet on Mar 23 1994.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Susquehanna River
  Conowingo Dam         23.5   23.06  Thu 530 AM   26.4   Fri 8 AM 
 
&&
 
LAT...LON 3966 7622 3968 7616 3955 7604 3952 7611
                                      

$$

Iovino
819 
WGUS81 KPHI 261445
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
1045 AM EDT Thu Jul 26 2018

...The Flood Warning continues for the following rivers in Maryland...
  Susquehanna Below Conowingo Dam affecting Cecil and Harford Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. The water may be
deeper than you think.

&&

MDC015-025-270045-
/O.CON.KPHI.FL.W.0025.000000T0000Z-000000T0000Z/
/CNWM2.2.ER.180726T1036Z.180727T1200Z.000000T0000Z.NO/
1045 AM EDT Thu Jul 26 2018

The Flood Warning continues for
  The Susquehanna at Conowingo Dam.
* At  9:30 AM Thursday the stage was 24.9 feet.
* Flood stage is 23.5 feet.
* Moderate flooding is occurring.
* Forecast...The river will continue rising to near 26.0 feet by Friday 
  morning.
* Impact...At 24.8 feet...Backyards and basements on Main Street and Tome's 
  Landing begin to flood.
* Flood history...This crest compares to a previous crest of 26.2 feet on Mar 23 
  1994.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Susquehanna River
  Conowingo Dam          23.5   24.90  Thu 9 AM    26.0    Fri 8 AM 
 
&&
 
LAT...LON 3966 7622 3968 7616 3955 7604 3952 7611
                                      

$$

Meola
863 
WGUS81 KPHI 270043
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
843 PM EDT Thu Jul 26 2018

...The Flood Warning continues for the following rivers in Maryland...
  Susquehanna Below Conowingo Dam affecting Cecil and Harford Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. The water may be
deeper than you think.

&&

MDC015-025-271042-
/O.CON.KPHI.FL.W.0025.000000T0000Z-000000T0000Z/
/CNWM2.2.ER.180726T1036Z.180726T1830Z.000000T0000Z.NO/
843 PM EDT Thu Jul 26 2018

The Flood Warning continues for
  The Susquehanna at Conowingo Dam.
* At 7:30 PM Thursday the stage was 25.9 feet.
* Flood stage is 23.5 feet.
* Moderate flooding is occurring.
* Forecast...The river will generally remain near 26 feet through Friday
  morning although it could fluctuate depending on coordinated releases from 
  the dam.
* Impact...At 24.8 feet...Backyards and basements on Main Street and Tome's 
  Landing begin to flood.
* Flood history...This crest compares to a previous crest of 26.2 feet on Mar 23 
  1994.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Susquehanna River
  Conowingo Dam          23.5   25.87  Thu 7 PM    26.0    Fri 8 AM 
 
&&
 
LAT...LON 3966 7622 3968 7616 3955 7604 3952 7611
                                      

$$
JRK
051 
WGUS81 KPHI 270915
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
515 AM EDT Fri Jul 27 2018

...The Flood Warning continues for the following rivers in Maryland...
  Susquehanna Below Conowingo Dam affecting Cecil and Harford Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. The water may be
deeper than you think.

&&

MDC015-025-271914-
/O.CON.KPHI.FL.W.0025.000000T0000Z-000000T0000Z/
/CNWM2.2.ER.180726T1036Z.180726T1830Z.000000T0000Z.NO/
515 AM EDT Fri Jul 27 2018

The Flood Warning continues for
  The Susquehanna at Conowingo Dam.
* At 4:30 AM Friday the stage was 24.6 feet.
* Flood stage is 23.5 feet.
* Minor flooding is occurring and Moderate flooding is forecast.
* Forecast...The river should crest early this morning then slowly fall, 
  however there can be fluctuations depending on coordinated releases from the dam.
* Impact...At 24.8 feet...Backyards and basements on Main Street and Tome's 
  Landing begin to flood.
* Flood history...This crest compares to a previous crest of 25.5 feet on Jan 10 
  1998.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Susquehanna River
  Conowingo Dam          23.5   24.57  Fri 4 AM    25.6  Fri 6 AM 
 
&&
 
LAT...LON 3966 7622 3968 7616 3955 7604 3952 7611
                                      

$$
633 
WGUS81 KPHI 271055
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
655 AM EDT Fri Jul 27 2018

...The Flood Warning continues for the following rivers in Maryland...
  
  Susquehanna Below Conowingo Dam affecting Cecil and Harford Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. The 
water may be deeper than you think.

&&

MDC015-025-272054-
/O.CON.KPHI.FL.W.0025.000000T0000Z-000000T0000Z/
/CNWM2.2.ER.180726T1036Z.180726T1830Z.000000T0000Z.NO/
655 AM EDT Fri Jul 27 2018

The Flood Warning continues for
  The Susquehanna at Conowingo Dam.
* At 6:30 AM Friday the stage was 24.4 feet.
* Flood stage is 23.5 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river will continue to fall today, although
  fluctuations are possible.
* Impact...At 24.8 feet...Backyards and basements on Main Street
  and Tome's Landing begin to flood.
* Flood history...This crest compares to a previous crest of 24.1 feet
  on Mar 22 2003.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG    DAY TIME    CREST

Susquehanna River
  Conowingo Dam          23.5   24.39  Fri 6 AM    Crested and falling 
 
&&
 
LAT...LON 3966 7622 3968 7616 3955 7604 3952 7611
                                      
$$

Kruzdlo
430 
WGUS81 KPHI 271538
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
1138 AM EDT Fri Jul 27 2018

...The Flood Warning continues for the following rivers in Maryland...

  Susquehanna Below Conowingo Dam affecting Cecil and Harford Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. The
water may be deeper than you think.

&&

MDC015-025-280138-
/O.CON.KPHI.FL.W.0025.000000T0000Z-000000T0000Z/
/CNWM2.2.ER.180726T1036Z.180726T1830Z.000000T0000Z.NO/
1138 AM EDT Fri Jul 27 2018

The Flood Warning continues for
  The Susquehanna at Conowingo Dam.
* At 10:30 AM Friday the stage was 24.3 feet.
* Flood stage is 23.5 feet.
* Forecast...The river will fall to a stage of 23.5 feet tonight,
  although fluctuations are possible.
* Impact...At 24.8 feet...Backyards and basements on Main Street and 
  Tome's Landing begin to flood.
* Flood history...This crest compares to a previous crest of 24.1 feet
  on Mar 22 2003.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG    DAY TIME    CREST

Susquehanna River
  Conowingo Dam          23.5   24.27  Fri 10 AM   Fluctuating 
 
&&
 
LAT...LON 3966 7622 3968 7616 3955 7604 3952 7611
                                      

$$

Kruzdlo
669 
WGUS81 KPHI 272354
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
754 PM EDT Fri Jul 27 2018

...The Flood Warning continues for the following rivers in Maryland...
  Susquehanna Below Conowingo Dam affecting Cecil and Harford Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. The water may be
deeper than you think.

&&

MDC015-025-280954-
/O.CON.KPHI.FL.W.0025.000000T0000Z-000000T0000Z/
/CNWM2.2.ER.180726T1036Z.180726T1830Z.000000T0000Z.NO/
754 PM EDT Fri Jul 27 2018

The Flood Warning continues for
  The Susquehanna at Conowingo Dam.
* At  7:30 PM Friday the stage was 23.2 feet.
* Flood stage is 23.5 feet.
* Forecast...The river is expected to stay near flood stage tonight.
* Impact...At 23.7 feet...Minor flooding begins in the town of Port Deposit, 
  Maryland.
* Flood history...This crest compares to a previous crest of 23.5 feet on Apr 19 
  2011.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Susquehanna River
  Conowingo Dam          23.5   23.19  Fri 7 PM    23.5    Fri 9 PM 
 
&&
 
LAT...LON 3966 7622 3968 7616 3955 7604 3952 7611
                                      

$$
392 
WGUS81 KPHI 280757
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
357 AM EDT Sat Jul 28 2018

...The Flood Warning is cancelled for the following rivers in Maryland...

  Susquehanna Below Conowingo Dam affecting Cecil and Harford Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. The water may be
deeper than you think.

&&

MDC015-025-280827-
/O.CAN.KPHI.FL.W.0025.000000T0000Z-180728T0757Z/
/CNWM2.2.ER.180726T1036Z.180726T1830Z.180727T1927Z.NO/
357 AM EDT Sat Jul 28 2018

The Flood Warning is cancelled for
  The Susquehanna at Conowingo Dam.
* At 3:30 AM Saturday the stage was 20.2 feet.
* Flood stage is 23.5 feet.

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Susquehanna River
  Conowingo Dam          23.5   20.17  Sat 3 AM            
 
&&
 
LAT...LON 3966 7622 3968 7616 3955 7604 3952 7611
                                      

$$

What forecasters said that day

The local office's own words before this river 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 river flood warning went out at Jul 25, 6:03 PM EDT, 2 hours 13 minutes earlier.

Area forecast discussion, Jul 25, 6:03 PM EDT, 2 hours 13 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
603 PM EDT Wed Jul 25 2018

.SYNOPSIS...
A weak front will cross the region on Thursday, followed by a second
front on Friday. High pressure will build in from the west on
Saturday, then slides towards New England by Monday. Another low
pressure system will affect the area early next week.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
600 PM...There are currently two separate south-north oriented
bands of organized precipitation that we are closely watching
early this evening since either could provide the focus for
locally heavy rainfall over the next several hours. So although
most of the area is expected to receive under one-half inch of
additional rainfall through tonight, it won't take much rain to
produce flooding, including life-threatening flash flooding,
considering how saturated the grounds already are from the
recent excessive rains. The first band was upstream (i.e.,
west) of our area in central MD and central PA along a cold
front. The second band, which was located farther east over
Delmarva and the Delaware Valley, was associated with a mid-
level shortwave trough and low-level convergence near the
western flank of the southerly low-level jet. The latest CAMS
(NAM Nest, HRRR, RAP), which do capture these two areas of
convection relatively well, show locally higher amounts of
1.5-3" along and east of I-95 and across our far western zones
in eastern PA (e.g., western Berks Co. and southern Poconos)
through tonight with most of it falling before midnight.

The wording in the Flash Flood Watch product was updated around
530 PM to match our latest thinking.

With few exceptions, most models show rain winding down after
midnight as the surface low lifts away from our region and some
frontolysis occurs along the front.

Thanks to persistent low clouds and high dew points, expect lows to
be in the upper 60s and lower 70s except across the southern Poconos
where slightly drier air may be advecting in earlier.

&&

.SHORT TERM /6 AM THURSDAY MORNING THROUGH 6 PM THURSDAY/...
What is left of the cold front should propagate off shore by
Thursday afternoon. However, there is limited temperature gradient
across the front, and with clouds clearing, we may actually see
temperatures slightly higher tomorrow than today. Some convection is
possible along the front, but is unlikely we will see widespread
rain.

&&

.LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/...
Thursday night should be mostly dry out as the cold front
dissipates offshore. Showers and thunderstorms will come to an
end during the evening.

A second cold front will push into the region on Friday but doesn't
really make it very far offshore as the Bermuda High remains in
control of the Atlantic. It starts to wash out lift to the north on
Saturday as high pressure starts to build in from the west. The
cooler, drier air gets hung up to the north and west of our area as
the blocking pattern continues and the upper level low struggles to
deepen and dip southward. So we won't see temperatures drop off all
that much behind the frontal passage. Dew points will start to fall
through Saturday as we have more mixing occur in the north to
northwest flow. This should help it feel less muggy outside,
especially Saturday night.

A chance for some showers and thunderstorms will continue through at
least Friday. Instability on Friday looks pretty good. The sun
should be out for a decent part of the day which will contribute to
surface heating and destabilizing the atmosphere. The best lift
looks to be primarily along and just ahead of the front. SPC has our
region in a Slight Risk for severe weather on Friday so this will
bear watching. Any lingering showers and convection should diminish
late Friday into early Saturday, ending from west to east. However,
with the front not moving very quickly and possibly stalling near
our area or just offshore, we could see some precipitation linger
through Saturday afternoon, mainly closer to the coast.

Sunday should dry out some as the high builds into the region. We
don't remain dry for long as the high is fairly progressive and
moves to the north and east of the region by late Sunday.  As the
high shifts to our north and east, we will see the flow swing around
to the southwest, once again bringing more moisture, and in turn,
humid weather to the region. PWATS will start to climb again as we
head into the new week as the southwest flow gets going. Periods of
showers and thunderstorms will again be likely through much of the
week as another upper trough digs down over the central part of the
country. With the strong ridging over the Atlantic, there will be
nowhere for the upper trough to go. At the surface, a low pressure
system will move up through the Tennessee and Ohio Valleys and into
the northeastern US around midweek. This will keep us unsettled
through much of the week. The ridging aloft and the associated
Bermuda high start to retrograde and shift west through the end of
the week.

&&

.AVIATION /22Z WEDNESDAY THROUGH MONDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

This afternoon and evening...Ceilings are expected to be variable
between MVFR and VFR as showers and a few thunderstorms move into
the region. Some of the showers will be capable of heavy rain
leading to reductions in visibility to IFR at times. Thunderstorms
will be isolated, so the confidence in lightning near any of the TAF
sites is low. Therefore, TAFs only have a mention of showers for
now. Low confidence in the timing of flight category changes and
showers. Winds will stay southerly or southeasterly around 10 kt.

Late Tonight... Showers should clear out late tonight, though low
clouds, either MVFR or IFR, may persist overnight. Due to the low
clouds being more persistent, have less confidence that fog will
develop, though with low dew point depressions this will have to be
monitored carefully. Moderate confidence on flight category, low
confidence on the timing of flight category changes.

Tomorrow...Once the low clouds dissipate, expect VFR conditions at
the TAF sites for most of the day. There is a chance for showers
which could once again temporarily reduce conditions to MVFR, but
the confidence of this directly affecting a TAF site is low. Winds
becoming southwesterly around 10 kt.

Outlook...

Thursday night...Mainly VFR conditions expected. Showers and
thunderstorms ending early. Light south to southwest winds. Some fog
may develop overnight.

Friday...Mainly VFR conditions expected. South to southwest winds
around 10 knots or less. A cold front will cross the region on
Friday with a chance for showers and thunderstorms, mainly in the
afternoon and evening, with MVFR or lower conditions possible.

Saturday through Monday...Mainly VFR conditions expected. Westerly
winds around 5 to 10 knots, becoming light overnight. Showers and
thunderstorms possible each day, with MVFR or lower conditions
possible.

&&

.MARINE...
Winds and waves should stay below Small Craft Advisory thresholds on
the Delaware Bay, except in the vicinity of showers and
thunderstorms where locally higher winds are possible.

On the ocean waters, SCA conditions continue, primarily for seas
above 5 feet, though occasional gusts above 25 kt are also expected.
Locally higher winds and waves are possible in the vicinity of any
showers and thunderstorms especially tonight.

Outlook...

Thursday night...Seas will gradually fall below 5 feet. Small Craft
Advisory is up through 06Z for the ocean.

Friday through Monday...Sub-advisory conditions expected. Seas may
start to rise again nearing 5 feet late Monday.

RIP CURRENTS...
As winds become more off shore, we may see slight improvement in the
surf conditions tomorrow. However, expect at least a moderate risk
for the formation of dangerous rip currents through the day
tomorrow.

&&

.HYDROLOGY...
Thanks to abundant moisture in the area, periods of heavy rain will
are possible, primarily through late this evening. This heavy rain
can be expected to produce areas of poor drainage and low lying
flooding, as well as localized areas of flash flooding.

There is also the potential flooding to occur on some rivers,
creeks, and streams across the area. Some larger rivers will also
see some rises and may reach their flood stage, including the
Lehigh, Susquehanna, and Schuylkill rivers. The area most at risk
for river flooding is along the Susquehanna in Cecil County. See the
AHPS page for details.

&&

.EQUIPMENT...
KDOX radar is still down. Technicians are currently working on
the radar but there is not estimated time the radar will return
to service.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flash Flood Watch through late tonight for PAZ054-055-060>062-
     070-071-101>106.
NJ...Flash Flood Watch through late tonight for NJZ001-007>010-
     012>020-026-027.
     High Rip Current Risk until 9 PM EDT this evening for NJZ014-
     024>026.
DE...Flash Flood Watch through late tonight for DEZ001-002.
     High Rip Current Risk until 9 PM EDT this evening for DEZ004.
MD...Flash Flood Watch through late tonight for MDZ008-012-015-019-
     020.
MARINE...Small Craft Advisory until 2 AM EDT Friday for ANZ450>455.

&&

Synopsis...Meola
Near Term...Johnson/Klein
Short Term...Johnson
Long Term...Meola
Aviation...Johnson/Meola
Marine...Johnson/Meola
Hydrology...Johnson
Equipment...Meola/Klein
Hazardous weather outlook, Jul 25, 3:46 PM EDT, 4 hours 30 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
346 PM EDT Wed Jul 25 2018

DEZ001-002-MDZ008-012-015-019-020-NJZ001-007>010-012-013-015>020-027-
PAZ054-055-060>062-070-071-101>106-262000-
New Castle-Kent-Cecil-Kent MD-Queen Annes-Talbot-Caroline-Sussex-
Warren-Morris-Hunterdon-Somerset-Middlesex-Western Monmouth-Mercer-
Salem-Gloucester-Camden-Northwestern Burlington-Ocean-
Southeastern Burlington-Carbon-Monroe-Berks-Lehigh-Northampton-
Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
346 PM EDT Wed Jul 25 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...

This Hazardous Weather Outlook is for central Delaware, 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...This Afternoon 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...Thursday through Tuesday.

There is a slight risk for severe thunderstorms Friday.

.SPOTTER INFORMATION STATEMENT...

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

DEZ003-NJZ021>023-262000-
Inland Sussex-Cumberland-Atlantic-Cape May-
346 PM EDT Wed Jul 25 2018

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

.DAY ONE...This Afternoon and Tonight.

Showers and isolated thunderstorms will result in heavy downpours,
and this could lead to localized urban and poor drainage flooding.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

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.

NJZ014-026-262000-
Eastern Monmouth-Coastal Ocean-
346 PM EDT Wed Jul 25 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...HIGH RIP CURRENT RISK IN EFFECT UNTIL 9 PM EDT THIS EVENING...

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

.DAY ONE...This Afternoon and Tonight.

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

   High Rip Current Risk.
   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

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.

DEZ004-NJZ024-025-262000-
Delaware Beaches-Atlantic Coastal Cape May-Coastal Atlantic-
346 PM EDT Wed Jul 25 2018

...HIGH RIP CURRENT RISK IN EFFECT UNTIL 9 PM EDT THIS EVENING...

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

.DAY ONE...This Afternoon and Tonight.

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

   High Rip Current Risk.

Showers and isolated thunderstorms will result in heavy downpours,
and this could lead to localized urban and poor drainage flooding.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

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.

ANZ430-431-450>455-262000-
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-
346 PM EDT Wed Jul 25 2018

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

.DAY ONE...This Afternoon and Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

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, Jul 25, 2:29 PM EDT, 5 hours 47 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
229 PM EDT WED JUL 25 2018

DEZ001>003-MDZ012-015-020-251915-
Inland Sussex-Kent-New Castle-Queen Anne's-Kent-Caroline-
229 PM EDT WED JUL 25 2018

...HEAVY SHOWERS WILL AFFECT WESTERN SUSSEX...SOUTH CENTRAL NEW
CASTLE...KENT...NORTHEASTERN QUEEN ANNE'S...CAROLINE AND EAST
CENTRAL KENT COUNTIES...

At 228 PM EDT, radar indicated showers were located along a line
extending from near Hazlettville to near Seaford. Movement was
northeast at 30 mph.

Heavy rainfall is occurring with these showers...and may cause
ponding on roadways and poor drainage areas. Do not drive your
vehicle through flooded roadways.

Occasional lightning may also develop at any time. Lightning can
strike 15 miles away from a thunderstorm. If you see lightning or
hear thunder seek a safe shelter inside a building or vehicle.

Locations impacted include...
Dover, Georgetown, Smyrna, Milford, Seaford, Denton, Laurel,
Harrington, Camden, Clayton, Federalsburg, Milton, Bridgeville,
Greensboro, Oakland, Ridgely, Cheswold, Sudlersville, Ellendale and
Bowers.

LAT...LON 3846 7569 3864 7571 3869 7577 3868 7580
      3871 7585 3897 7593 3917 7593 3944 7560
      3927 7541 3907 7541 3901 7533 3893 7532
      3885 7523 3845 7559
TIME...MOT...LOC 1828Z 210DEG 24KT 3915 7565 3862 7557

Robertson
Special weather statement, Jul 25, 5:43 PM EDT, 2 hours 33 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
543 PM EDT WED JUL 25 2018

DEZ001-MDZ008-NJZ009-010-015-018-019-PAZ070-071-101>106-252215-
New Castle-Cecil-Camden-Mercer-Hunterdon-Northwestern
Burlington-Somerset-Lower Bucks-Eastern Montgomery-Western
Chester-Philadelphia-Upper Bucks-Western Montgomery-Delaware-Eastern
Chester-
543 PM EDT WED JUL 25 2018

...HEAVY SHOWERS WILL AFFECT NORTHERN NEW CASTLE...NORTHERN
CECIL...SOUTHEASTERN HUNTERDON...NORTHWESTERN CAMDEN...WESTERN
MERCER...NORTHWESTERN BURLINGTON...SOUTHWESTERN SOMERSET...
MONTGOMERY...SOUTHERN BUCKS...CHESTER...PHILADELPHIA AND DELAWARE
COUNTIES...

At 541 PM EDT, radar indicated numerous moderate to heavy showers
across the area. Movement was north at 25 mph.

Heavy rainfall is occurring with these showers...and may cause
ponding on roadways and poor drainage areas. Do not drive your
vehicle through flooded roadways.

Occasional lightning may also develop at any time. Lightning can
strike 15 miles away from a thunderstorm. If you see lightning or
hear thunder seek a safe shelter inside a building or vehicle.

Locations impacted include...
Philadelphia, Trenton, Camden, Wilmington, Newark, West Chester,
Calvert, Bensalem, Ewing, Norristown, Chester, Willingboro,
Phoenixville, Lansdale, West Norriton, East Norriton, Coatesville,
Florence, Yeadon and Westtown.

LAT...LON 3973 7610 3987 7599 3995 7600 4004 7593
      4009 7594 4024 7557 4052 7473 4009 7471
      3985 7528 3984 7536 3980 7541 3974 7554
      3963 7616 3972 7623
TIME...MOT...LOC 2141Z 170DEG 20KT 3972 7617 4000 7557 4028 7482

Robertson
Special weather statement, Jul 25, 5:48 PM EDT, 2 hours 28 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
548 PM EDT WED JUL 25 2018

NJZ001-007>010-PAZ060>062-101-103-105-252215-
Morris-Hunterdon-Sussex-Somerset-Warren-Upper Bucks-Lehigh-Western
Montgomery-Western Chester-Northampton-Berks-
548 PM EDT WED JUL 25 2018

...A LINE OF SHOWERS WILL AFFECT WESTERN MORRIS...HUNTERDON...
SUSSEX...WARREN...NORTHWESTERN SOMERSET...SOUTHEASTERN BERKS...
NORTHWESTERN MONTGOMERY...SOUTHEASTERN LEHIGH...NORTHWESTERN BUCKS...
NORTH CENTRAL CHESTER AND NORTHAMPTON COUNTIES...

At 547 PM EDT, radar indicated numerous moderate to heavy showers
across the area. Movement was north at 25 mph.

Heavy rainfall is occurring with these showers...and may cause
ponding on roadways and poor drainage areas. Do not drive your
vehicle through flooded roadways.

Occasional lightning may also develop at any time. Lightning can
strike 15 miles away from a thunderstorm. If you see lightning or
hear thunder seek a safe shelter inside a building or vehicle.

Locations impacted include...
Allentown, Reading, Easton, Newton, Bethlehem, Pottstown, Hopatcong,
Forks, Emmaus, Wyomissing, Northampton, Hackettstown, Quakertown,
Perkasie, Byram, Wilson, Souderton, Bedminster, Washington and
Blairstown.

LAT...LON 4128 7452 4127 7451 4052 7471 4038 7515
      4008 7593 4011 7594 4014 7588 4029 7612
      4083 7528 4133 7463
TIME...MOT...LOC 2147Z 176DEG 16KT 4026 7569 4059 7522 4108 7455

Robertson
Special weather statement, Jul 25, 6:17 PM EDT, 1 hour 59 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
617 PM EDT WED JUL 25 2018

NJZ001-007>010-015-PAZ060>062-101>106-252300-
Mercer-Morris-Hunterdon-Sussex-Somerset-Warren-Lower
Bucks-Lehigh-Eastern Montgomery-Western Chester-Northampton-Upper
Bucks-Western Montgomery-Eastern Chester-Berks-
617 PM EDT WED JUL 25 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT MORRIS...HUNTERDON...
SUSSEX...WARREN...NORTHWESTERN MERCER...WESTERN SOMERSET...BERKS...
MONTGOMERY...LEHIGH...BUCKS...CHESTER AND NORTHAMPTON COUNTIES...

At 616 PM EDT, radar indicated numerous moderate to heavy showers
across the area. Movement was north at 25 mph.

Heavy rainfall is occurring with these showers...and may cause
ponding on roadways and poor drainage areas. Do not drive your
vehicle through flooded roadways.

Occasional lightning may also develop at any time. Lightning can
strike 15 miles away from a thunderstorm. If you see lightning or
hear thunder seek a safe shelter inside a building or vehicle.

Locations impacted include...
Allentown, Reading, Easton, West Chester, Morristown, Newton,
Bethlehem, Bridgewater, Ewing, Norristown, Pottstown, Dover,
Phoenixville, Lansdale, West Norriton, Hopatcong, Forks, East
Norriton, Coatesville and Emmaus.

LAT...LON 4121 7439 4109 7450 4104 7450 4105 7444
      4101 7435 4023 7485 4004 7534 4005 7539
      4001 7543 3976 7606 3987 7599 4011 7594
      4014 7588 4036 7620 4095 7507 4135 7471
TIME...MOT...LOC 2216Z 170DEG 14KT 4127 7448 4069 7510 4015 7604

Robertson
Special weather statement, Jul 25, 6:30 PM EDT, 1 hour 46 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
630 PM EDT WED JUL 25 2018

PAZ054-060-061-260030-
Lehigh-Berks-Carbon-
630 PM EDT WED JUL 25 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL BERKS...
NORTHWESTERN LEHIGH AND CENTRAL CARBON COUNTIES...

At 628 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Tremont to Marietta. Movement was
east at 15 mph.

Heavy rainfall is occurring with these showers...and may cause
ponding on roadways and poor drainage areas. Do not drive your
vehicle through flooded roadways.

Occasional lightning may also develop at any time. Lightning can
strike 15 miles away from a thunderstorm. If you see lightning or
hear thunder seek a safe shelter inside a building or vehicle.

Locations impacted include...
Reading, Wyomissing, Jim Thorpe, Hamburg, Sinking Spring, Laureldale,
Nesquehoning, Womelsdorf, Weatherly, Wernersville, Newmanstown,
Leesport, Shoemakersville, Bernville, Strausstown, Lenhartsville, New
Mahoning, Spring Ridge, Fairview Hgts and Wanamakers.

LAT...LON 4052 7625 4058 7605 4057 7602 4065 7598
      4071 7581 4072 7579 4075 7577 4091 7599
      4101 7573 4105 7577 4109 7577 4113 7567
      4111 7563 4020 7597 4049 7643
TIME...MOT...LOC 2228Z 251DEG 11KT 4064 7635 4006 7657

Meola
Special weather statement, Jul 25, 6:34 PM EDT, 1 hour 42 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
634 PM EDT WED JUL 25 2018

NJZ016>018-PAZ070-071-252315-
Salem-Camden-Gloucester-Delaware-Philadelphia-
634 PM EDT WED JUL 25 2018

...A HEAVY SHOWER WILL AFFECT EAST CENTRAL SALEM...NORTHWESTERN
CAMDEN... NORTHWESTERN GLOUCESTER...SOUTHWESTERN PHILADELPHIA AND
SOUTHEASTERN DELAWARE COUNTIES...

At 633 PM EDT, a shower was located near Mullica Hill, or 9 miles
south of Gloucester City, moving northeast at 15 mph.

Heavy rainfall is occurring with THIS shower...and may cause ponding
on roadways and poor drainage areas. Do not drive your vehicle
through flooded roadways.

Occasional lightning may also develop at any time. Lightning can
strike 15 miles away from a thunderstorm. If you see lightning or
hear thunder seek a safe shelter inside a building or vehicle.

Locations impacted include...
Philadelphia, Camden, Gloucester City, Cherry Hill, Deptford,
Voorhees, West Deptford, Glassboro, Lindenwold, Bellmawr, Yeadon,
Woodbury, Pitman, Clayton, Folcroft, Paulsboro, Magnolia, Westville,
Woodbury Heights and National Park.

LAT...LON 3954 7521 3978 7535 4006 7518 3986 7494
TIME...MOT...LOC 2233Z 208DEG 14KT 3977 7518

Robertson

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 8:24 PM EDTAreal Flood AdvisoryPHICecil2 hr
Jul 25, 9:29 PM EDTSpecial Weather StatementPHIQueen Anne's46 min

Nearby

River Flood Warnings in Maryland, 2018Every river 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; the gauge from the NWS water service and the USGS.