Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 287, NWS Philadelphia/Mount Holly

August 12, 2023New Castle County, Delaware; Chester County, Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 12, 2023, 4:37 PM EDT for New Castle County, Delaware; Chester County, Delaware County, Pennsylvania. It was in force for 38 min. 5 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 12, 2023, 4:37 PM EDT (20:37 UTC)
Expired
Aug 12, 2023, 5:15 PM EDT
In force
38 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties New Castle County, DE, Chester County, PA, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 97 km from the middle of the area, began a volume at 20:38 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 12, 4:39 PM EDTTSTM WND DMGNewlin Twp, PATrees and Wires down on Route 842 and Cannery Road in Newlin. Time estimated from radar.
Aug 12, 4:43 PM EDTTSTM WND DMG1 Ene Newlin Twp, PATrees and wires down on Unionville Wawaset Road. Time estimated from radar.
Aug 12, 4:46 PM EDTTSTM WND DMG1 Nnw East Marlborough, PATree down on Unionville Wawaset Road. Time estimated from radar.
Aug 12, 5:00 PM EDTTSTM WND DMG1 Ne East Marlborough T, PAReport of tree down into house on Marlborough Springs Road. Time estimated from radar.
Aug 12, 5:08 PM EDTTSTM WND DMG2 Ene Chadds Ford Twp, PAPublic sends in picture of downed tree on Hickory Mill Road. Time estimated from radar.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 5 storm reports to this severe thunderstorm warning; the first came 2 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.6 hours before the alert went out and 186 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 2023-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 176 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2023-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 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
176 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
1236 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
103 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

541 
WUUS51 KPHI 122037
SVRPHI
DEC003-PAC029-045-122115-
/O.NEW.KPHI.SV.W.0287.230812T2037Z-230812T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
437 PM EDT Sat Aug 12 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern New Castle County in northern Delaware...
  Central Chester County in southeastern Pennsylvania...
  Southern Delaware County in southeastern Pennsylvania...

* Until 515 PM EDT.

* At 437 PM EDT, a severe thunderstorm was located over Marshallton,
  or near West Chester, moving southeast at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Wilmington, West Chester, Chester, Pennsville, Westtown,
  Downingtown, Elsmere, Kennett Square, New Castle, Newport, Arden,
  Cheyney, Talleyville, Elam, Marshallton, Lima, Chelsea, Ashland,
  Greenville and Delaware Memorial Bridge.

This includes the following highways...
 Interstate 95 in Pennsylvania between mile markers 0 and 7.
 Interstate 95 in Delaware between mile markers 12 and 23.
 Interstate 476 in Pennsylvania between mile markers 0 and 1.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 4005 7571 3985 7528 3984 7536 3977 7546
      3972 7548 3969 7551 3967 7551 3966 7549
      3965 7548 3967 7552 3990 7584
TIME...MOT...LOC 2037Z 306DEG 19KT 3994 7571 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hoeflich
2 follow-up statements
132 
WWUS51 KPHI 122102
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
502 PM EDT Sat Aug 12 2023

DEC003-PAC029-045-122115-
/O.CON.KPHI.SV.W.0287.000000T0000Z-230812T2115Z/
New Castle DE-Chester PA-Delaware PA-
502 PM EDT Sat Aug 12 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTH CENTRAL NEW CASTLE...SOUTHEASTERN CHESTER AND SOUTHWESTERN
DELAWARE COUNTIES...

At 502 PM EDT, a severe thunderstorm was located near Kennett Square,
or near West Chester, moving southeast at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Wilmington, West Chester, Westtown, Elsmere, Kennett Square, Newport,
Arden, Cheyney, Talleyville, Elam, Chelsea, Ashland, Greenville,
Concordville, Hockessin, Marshallton, Chester Township, West Goshen,
Brookhaven and Chester Heights.

This includes the following highways...
 Interstate 95 in Pennsylvania between mile markers 0 and 1.
 Interstate 95 in Delaware between mile markers 12 and 23.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3986 7579 3999 7563 3987 7538 3971 7557
      3978 7568
TIME...MOT...LOC 2102Z 314DEG 14KT 3988 7565 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hoeflich
866 
WWUS51 KPHI 122110
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
510 PM EDT Sat Aug 12 2023

DEC003-PAC029-045-122120-
/O.EXP.KPHI.SV.W.0287.000000T0000Z-230812T2115Z/
New Castle DE-Chester PA-Delaware PA-
510 PM EDT Sat Aug 12 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL NEW CASTLE...
SOUTHEASTERN CHESTER AND SOUTHWESTERN DELAWARE COUNTIES WILL EXPIRE
AT 515 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

LAT...LON 3986 7579 3999 7563 3987 7538 3971 7557
      3978 7568
TIME...MOT...LOC 2110Z 306DEG 19KT 3989 7566 

$$

Hoeflich

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Aug 12, 3:08 PM EDT, 1 hour 29 minutes earlier.

Area forecast discussion, Aug 12, 3:08 PM EDT, 1 hour 29 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
308 PM EDT Sat Aug 12 2023

.SYNOPSIS...
A cold front arrives into our area later tonight then settles south
and eastward Sunday. A warm front then arrives later Monday with a
stronger cold front crossing the area Tuesday. High pressure then
builds in Wednesday into Thursday. The next cold front is scheduled
to move through later Friday with high pressure arriving for
Saturday.

&&

.NEAR TERM /THROUGH SUNDAY/...
Scattered showers and thunderstorms have formed early this
afternoon in response to a passing shortwave causing lift in a
very warm and unstable airmass. The best chance for convection
should be mainly north of a ACY to ILG line. There will be two
shortwaves passing through the region, one during the late
afternoon, then a second shortwave overnight which will likely
bring more convection through the region between 00Z and 06Z.
This second batch of storms likely has less instability to work
with, but an isolated severe storm can't be ruled out overnight
either.

SPC has placed the Poconos and Sussex county NJ in a Enhanced
Risk of severe thunderstorms for this afternoon and evening,
and a Slight Risk across northern NJ into the Lehigh Valley. Locally
heavy rain remains a risk, but primarily in the far north, and
storm motion should generally keep rainfall relatively limited
today, with training the most likely reason to get any flooding.

The cold front from Saturday night will largely wash out across
the region Sunday morning, eventually departing offshore late
Sunday. Given westerly flow, the seabreeze won't make it too
far inland. Otherwise, another warm and humid day on Sunday with
temperatures climbing into the upper 80s/low 90s with dewpoints
in the upper 60s/low 70s.

&&

.SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY NIGHT/...
Increasing more humid along with a period of showers and thunderstorms.

A trailing front which continues to look weak and potentially even
dissipating across our area may still focus a shower or thunderstorm
Sunday evening mainly across southern Delaware. Otherwise, clouds
should persist through the night.

As we go through Monday, it looks to turn more active again. An
upper-level trough is forecast to gradually shift eastward from the
Midwest and Great Lakes. The guidance is in decent agreement that
this trough has a positive tilt as it shifts eastward. Downstream
moisture and thermal advections will assist in a more humid air mass
working northward across our area especially as a warm front moves
in. While a shower or thunderstorm is possible with the uptick in
moisture/thermal advections and incoming warm front, the forcing
overall looks on the weaker side initially. Our attention then turns
to a stronger shortwave that ejects out ahead of the main through
and moves across our area Monday afternoon and evening. This
shortwave could be convectively enhanced with an accompanied
strengthening low-level jet. Showers and thunderstorms should be on
the increase associated with this feature and with some increase in
shear, convection may organize into a cluster/MCS with some
potential for locally strong/damaging winds. The magnitude of the
severe thunderstorm threat will depend on the degree of instability,
timing and low to mid level lapse rates. The greatest instability
will be south of the warm front. The timing overall looks to be
later Monday afternoon and Monday night for the greater chances for
showers and thunderstorms.

A expansive plume of 2+ inches of precipitable water is forecast to
be in place Monday ahead of the upper-level trough and cold front.
The intersection of an initial southwesterly low-level jet with a
northward moving warm front may enhance locally heavy rainfall
especially where convection becomes more organized later Monday
afternoon and Monday night. While there continues to be some flash
flood threat especially in areas that have been wet the last few
weeks, the placement of the warm front will be key as instability to
its north looks to be minimal. The convection should tend to settle
down overnight Monday night as the main shortwave shifts eastward.
As low pressure tracks to our north though, a cold front looks to
cross our area Tuesday. While Tuesday should be trending drier as
time wears on, still cannot rule out some lingering convection until
the cold front clears the coast and then there is also the
positively tilted upper-level trough arriving. The better drying
looks to take place Tuesday night as the precipitable water values
drop significantly and the trough aloft weakens.

&&

.LONG TERM /WEDNESDAY THROUGH SATURDAY/...
Summary...Cooler and less humid to start but then becoming warmer
and more humid again.

Synoptic Overview...The tailend of a weakening upper-level trough is
forecast to be sliding across our region Wednesday. The flow aloft
in the East then turns more zonal into Thursday before the next
upper-level trough across the Midwest and upper Great Lakes shifts
eastward. Some guidance shows this trough taking on a negative tilt
as it lifts across the Northeast Friday then well to our north
Saturday. At the surface, high pressure builds in Wednesday before
shifting offshore Thursday. A warm front may lift northward across
our area later Thursday, followed by a cold front later Friday.
Surface high pressure then arrives for Saturday.

For Wednesday and Thursday...As the tailend of a weakening upper-
level trough shifts across our area Wednesday, surface high pressure
is currently forecast to build in. This will deliver a cooler and
drier air mass therefore dew points will be in the more comfortable
range. This looks to be short in duration though as high pressure
shifts eastward, with a return flow setting up into Thursday. Well
ahead of an upper-level trough in the Midwest, a warm front is
forecast to lift across our area during Thursday. This will usher in
higher dew points as low-level warm air and moisture advections
increase. Cannot rule out a shower or thunderstorm with the warm
front, but overall forcing looks weak and we then await for the cold
front to arrive. Temperatures Thursday are forecast to be several
degrees warmer than Wednesday and it will also be turning more humid.

For Friday and Saturday...The details during this time frame will
depend on the timing and amplitude of an incoming upper-level
trough. Some guidance shows this trough taking on a negative tilt
which typically strengthens the wind fields and also the forcing for
ascent. This upper-level feature will drive surface low pressure to
our north, however an associated cold front is currently forecast to
cross our area later Friday. The magnitude of the shear and
instability will determine the extent of convection ahead of and
with the incoming cold front. This upper-level trough looks
progressive therefore it lifts to our north into Saturday with high
pressure at the surface to build in. It will be very warm and humid
ahead of this cold front.

&&

.AVIATION /19Z SATURDAY THROUGH THURSDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Through 00Z this evening...generally VFR. Widely scattered
thunderstorms will briefly drop vsby and cigs to MVFR levels.
Brief intervals of IFR are possible with scattered stronger
thunderstorms most likely to affect the Lehigh Valley, Poconos,
and northern NJ. Winds SSW increasing to around 10 kts with
gusts up to 20 kts.

Tonight...generally VFR, but with brief intervals of MVFR and
possibly IFR vsby with scattered stronger thunderstorms. Again,
best chance of impacts is in the Lehigh Valley, Poconos, and
northern NJ. Winds mainly southerly around 5 kts.

Sunday...VFR. Westerly winds around 10 kt.

Outlook...

Sunday Night...VFR overall. Winds becoming light and variable.
Moderate confidence.

Monday...A period of sub-VFR conditions, especially later in the
afternoon and at night with some showers and thunderstorms. Light
and variable winds becoming southeast to southwest around 10 knots.
Low confidence.

Tuesday...VFR overall. A few showers and thunderstorms are possible.
Southwest to west winds increasing to 10-15 knots with gusts up to
20 knots, then diminishing to less than 10 knots at night. Low
confidence.

Wednesday and Thursday...VFR. Northwest to west winds 5-10 knots
Wednesday, then southerly 5-10 knots Thursday. Moderate confidence.

&&

.MARINE...
Conditions will remain below Small Craft Advisory levels through
tonight. Winds will be southerly at 10-15 kts with a few gusts
up around 20 kts. Seas will be 2-4 ft. Main concern will be
potential gusty thunderstorms this afternoon into tonight, with
the highest risk over the waters north of Atlantic City NJ.

Sunday...No marine headlines expected. Southwest winds around
10-15 kt. Seas 2 to 3 feet.

Outlook...

Sunday night and Monday...The conditions are anticipated to be below
Small Craft Advisory criteria. Some thunderstorms expected later
Monday.

Tuesday through Thursday...The conditions are anticipated to be
mainly below Small Craft Advisory criteria.

Rip currents...

Through this evening, southerly winds 10 to 15 mph with gusts
up to 20 mph with breaking waves of 1 to 2 feet. There will also
be a medium period southeast swell. As a result, there is a LOW
risk for the development of dangerous rip currents at the New
Jersey and Delaware beaches.

On Sunday, winds remain parallel to the coast with south to
southwest winds of 10 to 15 mph with gusts up to 20 mph. Once
again, there will be a medium period southeast swell. There is a
LOW risk for the development of dangerous rip currents at New
Jersey and Delaware beaches.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...None.

&&

SYNOPSIS...Gorse
NEAR TERM...Franklin/RCM
SHORT TERM...Gorse
LONG TERM...Gorse
AVIATION...Franklin/Gorse/RCM
MARINE...Franklin/Gorse/RCM
Hazardous weather outlook, Aug 12, 4:27 PM EDT, 10 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
0427 PM EDT Sat Aug 12 2023

DEZ001-132027-
New Castle-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for New Castle County in Delaware.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

DEZ002-132027-
Kent-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Kent County in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

DEZ003-132027-
Inland Sussex-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for inland portions of Sussex County
in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

DEZ004-132027-
Delaware Beaches-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for the Atlantic coastal portions of
Sussex County in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

PAZ054-132027-
Carbon-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Carbon County in Pennsylvania.

.DAY ONE...Through tonight.

Numerous severe thunderstorms are expected.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

PAZ055-132027-
Monroe-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Monroe County in Pennsylvania.

.DAY ONE...Through tonight.

Numerous severe thunderstorms are expected.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

PAZ060-132027-
Berks-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Berks County in Pennsylvania.

.DAY ONE...Through tonight.

Scattered severe thunderstorms are possible.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ061-132027-
Lehigh-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Lehigh County in Pennsylvania.

.DAY ONE...Through tonight.

Numerous severe thunderstorms are expected.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ062-132027-
Northampton-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Northampton County in
Pennsylvania.

.DAY ONE...Through tonight.

Numerous severe thunderstorms are expected.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ070-132027-
Delaware-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Delaware County in Pennsylvania.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ071-132027-
Philadelphia-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Philadelphia County in
Pennsylvania.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ101-132027-
Western Chester-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for western Chester County in
Pennsylvania.

.DAY ONE...Through tonight.

Scattered severe thunderstorms are possible.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ102-132027-
Eastern Chester-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for eastern Chester County in
Pennsylvania.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ103-132027-
Western Montgomery-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for western Montgomery County in
Pennsylvania.

.DAY ONE...Through tonight.

Scattered severe thunderstorms are possible.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ104-132027-
Eastern Montgomery-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for eastern Montgomery County in
Pennsylvania.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ105-132027-
Upper Bucks-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for upper Bucks County in
Pennsylvania.

.DAY ONE...Through tonight.

Scattered severe thunderstorms are possible.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

PAZ106-132027-
Lower Bucks-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for lower Bucks County in
Pennsylvania.

.DAY ONE...Through tonight.

Scattered severe thunderstorms are possible.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ001-132027-
Sussex-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Sussex County in New Jersey.

.DAY ONE...Through tonight.

Several instances of flooding are possible, especially in urban and
poor-drainage areas and near vulnerable small creeks and streams.
Numerous severe thunderstorms are expected.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

NJZ007-132027-
Warren-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Warren County in New Jersey.

.DAY ONE...Through tonight.

Numerous severe thunderstorms are expected.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

NJZ008-132027-
Morris-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Morris County in New Jersey.

.DAY ONE...Through tonight.

Scattered severe thunderstorms are possible.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

NJZ009-132027-
Hunterdon-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Hunterdon County in New Jersey.

.DAY ONE...Through tonight.

Scattered severe thunderstorms are possible.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ010-132027-
Somerset-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Somerset County in New Jersey.

.DAY ONE...Through tonight.

Scattered severe thunderstorms are possible.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ012-132027-
Middlesex-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Middlesex County in New Jersey.

.DAY ONE...Through tonight.

Scattered severe thunderstorms are possible.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ013-132027-
Western Monmouth-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for western Monmouth County in New
Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ014-132027-
Eastern Monmouth-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for eastern Monmouth County in New
Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ015-132027-
Mercer-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Mercer County in New Jersey.

.DAY ONE...Through tonight.

Scattered severe thunderstorms are possible.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ016-132027-
Salem-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Salem County in New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ017-132027-
Gloucester-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Gloucester County in New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ018-132027-
Camden-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Camden County in New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ019-132027-
Northwestern Burlington-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for northwestern Burlington County in
New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ020-132027-
Ocean-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for inland portions of Ocean County
in New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ021-132027-
Cumberland-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Cumberland County in New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ022-132027-
Atlantic-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for inland portions of Atlantic
County in New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ023-132027-
Cape May-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Cape May County excluding the
Atlantic coast in New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ024-132027-
Atlantic Coastal Cape May-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for the Atlantic coastal portions of
Cape May County in New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ025-132027-
Coastal Atlantic-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for coastal portions of Atlantic
County in New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ026-132027-
Coastal Ocean-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for coastal portions of Ocean County
in New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

NJZ027-132027-
Southeastern Burlington-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for southeastern Burlington County in
New Jersey.

.DAY ONE...Through tonight.

There is a low probability of widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Several instances of flooding are possible on Monday,
especially in urban and poor-drainage areas and near particularly vulnerable
small creeks and streams.

Please go to weather.gov/phi/ehwo for more information on
potential weather hazards.

.SPOTTER INFORMATION STATEMENT...

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

MDZ012-132027-
Kent MD-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Kent County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

MDZ015-132027-
Queen Annes-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Queen Annes County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

MDZ019-132027-
Talbot-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Talbot County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

MDZ020-132027-
Caroline-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for Caroline County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

ANZ430-132027-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for upper Delaware Bay.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

ANZ431-132027-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for lower Delaware Bay.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

ANZ450-132027-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Monmouth County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

ANZ451-132027-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Ocean County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

ANZ452-132027-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Atlantic County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

ANZ453-132027-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Cape May County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

ANZ454-132027-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to the mouth of Delaware Bay out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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.

ANZ455-132027-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
0427 PM EDT Sat Aug 12 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Sussex County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

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 12, 1:40 PM EDT, 2 hours 57 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
140 PM EDT Sat Aug 12 2023

NJZ017>019-027-121815-
Northwestern Burlington NJ-Camden NJ-Gloucester NJ-
Southeastern Burlington NJ-
140 PM EDT Sat Aug 12 2023

...A strong thunderstorm will impact portions of northern Camden,
north central Gloucester and west central Burlington Counties through
215 PM EDT...

At 140 PM EDT, Doppler radar was tracking a strong thunderstorm over
Lindenwold, or 7 miles southeast of Gloucester City, moving east at
30 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Gloucester City, Cherry Hill, Evesham, Mount Laurel, Voorhees,
Medford, Lindenwold, Lumberton, Bellmawr, Mount Holly, Berlin,
Shamong, Magnolia, Westville, Brooklawn, Audubon Park,
Barclay-Kingston, Marlton, Erlton-Ellisburg and Greentree.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 4.
 Interstate 76 in New Jersey between mile markers 0 and 1.
 Interstate 295 in New Jersey between mile markers 26 and 40.
 Atlantic City Expressway between mile markers 42 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3975 7508 3989 7513 4001 7479 3976 7469
TIME...MOT...LOC 1740Z 253DEG 25KT 3982 7501

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

MLB
Special weather statement, Aug 12, 2:37 PM EDT, 2 hours before
Special Weather Statement
National Weather Service Mount Holly NJ
237 PM EDT Sat Aug 12 2023

NJZ009-010-012-015-PAZ106-121915-
Hunterdon NJ-Somerset NJ-Middlesex NJ-Mercer NJ-Lower Bucks PA-
237 PM EDT Sat Aug 12 2023

...A strong thunderstorm will impact portions of southeastern
Hunterdon, northern Mercer, southwestern Somerset, southwestern
Middlesex and east central Bucks Counties through 315 PM EDT...

At 237 PM EDT, Doppler radar was tracking a strong thunderstorm near
Pennington, or 11 miles northwest of Trenton, moving east at 15 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Ewing, Princeton, Pennington, New Hope, Hopewell, Rocky Hill,
Millstone, Washington Crossing, Skillman, Princeton Meadows,
Sergeantsville, Kingston, Plainsboro Center, Belle Mead,
Lawrenceville, Cloverhill, Kendall Park, Lambertville, Princeton
Junction and Princeton North.

This includes Interstate 295 in New Jersey between mile markers 67
and 75.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4027 7494 4045 7496 4053 7458 4026 7455
TIME...MOT...LOC 1837Z 264DEG 15KT 4038 7486

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Hoeflich
Local storm report, Aug 12, 2:53 PM EDT, 1 hour 44 minutes before
Preliminary Local Storm Report
National Weather Service Mount Holly NJ
253 PM EDT Sat Aug 12 2023

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

0147 PM     Tstm Wnd Dmg     Lindenwold              39.82N 74.97W
08/12/2023                   Camden             NJ   911 Call Center

            Three trees down in Lindenwold. Time
            estimated via radar.

&&

MLB
Special weather statement, Aug 12, 3:06 PM EDT, 1 hour 31 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
306 PM EDT Sat Aug 12 2023

PAZ060-121930-
Berks PA-
306 PM EDT Sat Aug 12 2023

...A strong thunderstorm will impact portions of Berks County through
330 PM EDT...

At 305 PM EDT, Doppler radar was tracking a strong thunderstorm over
Strausstown, or 8 miles northeast of Myerstown, moving east at 30
mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Reading, Wyomissing, Kutztown, Hamburg, Fleetwood, Sinking Spring,
Laureldale, Womelsdorf, Wernersville, Topton, Robesonia, Leesport,
Shoemakersville, Bernville, Lyons, Strausstown, Spring Ridge,
Fairview Hgts, Shillington and West Reading.

This includes the following highways...
 Interstate 78 in Pennsylvania between mile markers 10 and 28.
 Interstate 176 in Pennsylvania near mile marker 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4052 7634 4052 7625 4055 7615 4053 7566
      4027 7569 4034 7619 4049 7643
TIME...MOT...LOC 1905Z 276DEG 27KT 4045 7619

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Hoeflich
Special weather statement, Aug 12, 3:39 PM EDT, 58 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
339 PM EDT Sat Aug 12 2023

PAZ060-103-122015-
Western Montgomery PA-Berks PA-
339 PM EDT Sat Aug 12 2023

...A strong thunderstorm will impact portions of southeastern Berks
and northwestern Montgomery Counties through 415 PM EDT...

At 339 PM EDT, Doppler radar was tracking a strong thunderstorm over
Spring Ridge, or near Reading, moving east at 30 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Reading, Pottstown, Wyomissing, Birdsboro, Fleetwood, Sinking Spring,
Laureldale, Wernersville, Leesport, Bally, Bechtelsville, Spring
Ridge, Fairview Hgts, Gilbertsville, Stowe, Shillington, West
Reading, Boyertown, Mount Penn and Mohnton.

This includes Interstate 176 in Pennsylvania between mile markers 10
and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4048 7605 4047 7557 4045 7553 4021 7557
      4021 7559 4024 7560 4024 7561 4023 7560
      4024 7565 4024 7570 4032 7608
TIME...MOT...LOC 1939Z 276DEG 27KT 4038 7598

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Hoeflich
Special weather statement, Aug 12, 3:55 PM EDT, 42 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
355 PM EDT Sat Aug 12 2023

PAZ070-101-102-122030-
Delaware PA-Western Chester PA-Eastern Chester PA-
355 PM EDT Sat Aug 12 2023

...A strong thunderstorm will impact portions of central Chester and
western Delaware Counties through 430 PM EDT...

At 355 PM EDT, Doppler radar was tracking a strong thunderstorm over
Honey Brook, or 9 miles east of New Holland, moving east at 30 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
West Chester, Coatesville, Westtown, Downingtown, Parkesburg, Honey
Brook, Cheyney, Marshallton, Lima, Chelsea, Lionville-Marchwood,
Gradyville, Valley Forge, Glenmoore, Paoli, Chester Springs,
Lionville, Concordville, Radnor Township and West Goshen.

This includes Pennsylvania Turnpike between mile markers 304 and 325.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4004 7593 4011 7594 4014 7587 4011 7547
      4009 7545 4009 7542 4007 7540 3985 7545
      3996 7599
TIME...MOT...LOC 1955Z 280DEG 26KT 4005 7591

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Hoeflich

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 12:57 PM EDTAreal Flood AdvisoryPHINew Castle3 hr
Aug 12, 1:38 PM EDTAreal Flood AdvisoryPHIDelaware, Philadelphia3 hr
Aug 12, 3:06 PM EDTSpecial Weather StatementPHIBerks24 min
Aug 12, 3:39 PM EDTSpecial Weather StatementPHIBerks36 min
Aug 12, 3:49 PM EDTSevere Thunderstorm WarningPHIBerks, Chester, Montgomery41 min
Aug 12, 3:55 PM EDTSpecial Weather StatementPHIChester35 min
Aug 12, 4:06 PM EDTSevere Thunderstorm WarningPHIChester, Delaware39 min
Aug 12, 4:57 PM EDTSevere Thunderstorm WarningPHICarbon48 min
Aug 12, 5:05 PM EDTAreal Flood AdvisoryPHIChester3 hr
Aug 12, 5:16 PM EDTSpecial Weather StatementPHIDelaware29 min
Aug 12, 5:31 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery44 min
Aug 12, 6:42 PM EDTSpecial Weather StatementPHIMontgomery33 min
Aug 12, 6:47 PM EDTSevere Thunderstorm WarningPHIChester, Delaware, Montgomery28 min
Aug 12, 6:58 PM EDTAreal Flood AdvisoryPHIChester3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2023Severe Thunderstorm Warnings in Delaware, 2023Every severe thunderstorm warning in 2023

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.