Pennsylvania, 2021

Damaging Wind in Pennsylvania, September 28, 2021

September 28, 2021 · NWS PHI · 1 event in 1 county or zone

A few showers and thunderstorms developed over eastern Pennsylvania on September 28 ahead of a cold front. Activity was isolated in nature and produced little impact overall.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS PHI wrote it up.

A few showers and thunderstorms developed over eastern Pennsylvania on September 28 ahead of a cold front. Activity was isolated in nature and produced little impact overall. One storm in southeast Pennsylvania briefly became severe, before activity continued to weaken as it moved off to the east.

What forecasters said that day

The local office's own words before the first event, 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 the first event at Sep 28, 6:05 PM EST, 27 minutes earlier.

Area forecast discussion, Sep 28, 6:05 PM EST, 27 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
705 PM EDT Tue Sep 28 2021

.SYNOPSIS...
A cold front will continue to shift offshore this evening and
out to sea tonight. As low pressure moves across the Canadian
Maritimes Wednesday and Thursday, a couple of weak surface
troughs may move across the region. High pressure is forecast to
affect the Mid Atlantic and northeast states Friday into
Saturday. A frontal boundary is forecast to affect the area late
in the weekend into early next week.

&&

.NEAR TERM /THROUGH WEDNESDAY/...
For the early evening update, significantly decreased PoPs
through the remainder of the evening. Now that we are past
sunset and the vorticity maximum associated with the mid level
trough is off shore, the window of opportunity for new
convective development is rapidly closing. In addition, the
front which had been nearly stationary to our northwest for much
of the day has finally started making quick progress southeast
through the region. As of 7 PM, the front was over the Delaware
Valley already.

The lone thunderstorm complex in our area (over Chester and
Montgomery Counties as of 7 PM) should continue to progress
southeastward along the front for another few hours before
dissipating. Outside of that complex isolated showers are
possible, but not expecting any more organized thunderstorm
complexes. Expecting showers and storms to be done across our
region by late this evening.

Skies will clear behind the cold front and lead to a
cloud-free sunrise. Overnight lows will drop into the mid 40s
well north and west and in the 50s elsewhere. Winds will veer to
the northwest behind the front and likely hang out in the 5 to
10 mph range.

Surface high pressure will build into the area tomorrow as a
deep closed low spins over Maine. Highs tomorrow will be in the
60s to lower 70s. Sunny skies can be expected along with
northwest winds around 10 mph and gusts up to 20 mph.

&&

.SHORT TERM /WEDNESDAY NIGHT THROUGH THURSDAY NIGHT/...
Surface low pressure will move across the Canadian Maritimes
Wednesday night through Thursday night, while a cut off low
aloft drifts across the northeast states and into southeast
Canada. A couple of weak surface troughs may move across the
region, however, there is not much moisture forecast during this
period with precipitable water values of 0.50 inches or less.
The main effects during this period will be an increase in cloud
cover during the day Thursday due to a potent short
wave/vorticity impulse forecast to move across the area.
Overall, a dry and seasonably cool period is expected Wednesday
night through Thursday night.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...
The long term forecast begins rather benign and dry overall for
Friday through Saturday. High pressure is forecast to build
southward out of southeastern Canada Friday through Saturday,
before move out of the area Saturday night. Northwest flow aloft
will keep temperatures seasonably cool and dry weather in place
through Saturday. Then questions develop for the remainder of
the weekend into early next week due to model differences. The
GFS breaks down the high and retreats it northward as a frontal
boundary approaches from the south and stalls near the area into
early next week. However, the ECMWF, Canadian, and other
guidance shift the high to our south while a backdoor cold front
moves into the area, before stalling near the area into early
next week. Due to the uncertainty in the model guidance, we have
stayed close to the National Blend of Models (NBM) forecast.
Either way, there will be a chance of showers from Sunday
through Tuesday. If the backdoor cold front solution ends up
being the outcome, temperatures over the weekend into early next
week could be a few degrees warmer than forecast before the
front moves through.

&&

.AVIATION /00Z WEDNESDAY THROUGH SUNDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Tonight...Prevailing VFR. An isolated thunderstorm may get close
to KPHL, KILG, and KMIV before 02Z, but otherwise should have
few, if any clouds. Winds northerly around 5-10 kts. High
confidence.

Wednesday...Prevailing VFR. Winds north to northwesterly around
10 kts with gusts approaching 20 kts. High confidence.

Outlook...

Wednesday night-Saturday night...Mostly VFR expected. Northwest
winds 5-10 knots or less, becoming west during the day Saturday
and Saturday night. High confidence.

Sunday-Sunday night...Generally VFR conditions with a chance of
showers which may lead to lower conditions. West to northwest
winds 5-10 knots. Low confidence.

&&

.MARINE...
Tonight...Westerly winds around 10-15 kts with gusts up to 20
kts will become northerly around midnight. Seas 2-4 feet.
Scattered showers and thunderstorms during the evening hours.

Wednesday...Sub-advisory conditions expected. Winds northerly
around 10-15 kts. Seas 2-4 feet.

Outlook...

Wednesday night-Sunday...Winds and seas are expected to remain
below advisory levels through the period, although winds could
gust around 20 knots at times and seas could approach 4 feet at
times.

Rip Currents...

A LOW risk of dangerous rip currents is expected the rest of
today and Wednesday.

&&

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

&&

Synopsis...Robertson
Near Term...Johnson/Kruzdlo
Short Term...Robertson
Long Term...Robertson
Aviation...Johnson/Kruzdlo/Robertson
Marine...Kruzdlo/Robertson
Hazardous weather outlook, Sep 28, 4:02 PM EST, 2 hours 30 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
0502 PM EDT Tue Sep 28 2021

DEZ001-292102-
New Castle-
0502 PM EDT Tue Sep 28 2021

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

.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...Wednesday through Monday.

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.

DEZ002-292102-
Kent-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Kent County in Delaware.

.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...Wednesday through Monday.

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.

DEZ003-292102-
Inland Sussex-
0502 PM EDT Tue Sep 28 2021

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

.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...Wednesday through Monday.

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.

DEZ004-292102-
Delaware Beaches-
0502 PM EDT Tue Sep 28 2021

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

.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...Wednesday through Monday.

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.

PAZ054-292102-
Carbon-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Carbon County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

PAZ055-292102-
Monroe-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Monroe County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

PAZ060-292102-
Berks-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Berks County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

PAZ061-292102-
Lehigh-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Lehigh County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

PAZ062-292102-
Northampton-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Northampton County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

PAZ070-292102-
Delaware-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Delaware 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...Wednesday through Monday.

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.

PAZ071-292102-
Philadelphia-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Philadelphia 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...Wednesday through Monday.

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.

PAZ101-292102-
Western Chester-
0502 PM EDT Tue Sep 28 2021

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...Wednesday through Monday.

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.

PAZ102-292102-
Eastern Chester-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for eastern 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...Wednesday through Monday.

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.

PAZ103-292102-
Western Montgomery-
0502 PM EDT Tue Sep 28 2021

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...Wednesday through Monday.

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.

PAZ104-292102-
Eastern Montgomery-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for eastern 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...Wednesday through Monday.

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.

PAZ105-292102-
Upper Bucks-
0502 PM EDT Tue Sep 28 2021

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

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

PAZ106-292102-
Lower Bucks-
0502 PM EDT Tue Sep 28 2021

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...Wednesday through Monday.

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.

NJZ001-292102-
Sussex-
0502 PM EDT Tue Sep 28 2021

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

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

NJZ007-292102-
Warren-
0502 PM EDT Tue Sep 28 2021

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

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

NJZ008-292102-
Morris-
0502 PM EDT Tue Sep 28 2021

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

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

NJZ009-292102-
Hunterdon-
0502 PM EDT Tue Sep 28 2021

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

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

NJZ010-292102-
Somerset-
0502 PM EDT Tue Sep 28 2021

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

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

NJZ012-292102-
Middlesex-
0502 PM EDT Tue Sep 28 2021

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

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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.

NJZ013-292102-
Western Monmouth-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for western Monmouth 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...Wednesday through Monday.

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.

NJZ014-292102-
Eastern Monmouth-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for eastern Monmouth 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...Wednesday through Monday.

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.

NJZ015-292102-
Mercer-
0502 PM EDT Tue Sep 28 2021

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...Wednesday through Monday.

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.

NJZ016-292102-
Salem-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Salem 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...Wednesday through Monday.

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.

NJZ017-292102-
Gloucester-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Gloucester 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...Wednesday through Monday.

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.

NJZ018-292102-
Camden-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Camden 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...Wednesday through Monday.

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.

NJZ019-292102-
Northwestern Burlington-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for northwestern Burlington 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...Wednesday through Monday.

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.

NJZ020-292102-
Ocean-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for inland portions of Ocean 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...Wednesday through Monday.

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.

NJZ021-292102-
Cumberland-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Cumberland 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...Wednesday through Monday.

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.

NJZ022-292102-
Atlantic-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for inland portions of Atlantic
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...Wednesday through Monday.

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.

NJZ023-292102-
Cape May-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Cape May County excluding the
Atlantic coast 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...Wednesday through Monday.

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.

NJZ024-292102-
Atlantic Coastal Cape May-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for the Atlantic coastal portions of
Cape May 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...Wednesday through Monday.

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.

NJZ025-292102-
Coastal Atlantic-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for coastal portions of Atlantic
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...Wednesday through Monday.

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.

NJZ026-292102-
Coastal Ocean-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for coastal portions of Ocean 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...Wednesday through Monday.

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.

NJZ027-292102-
Southeastern Burlington-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for southeastern Burlington 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...Wednesday through Monday.

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.

MDZ012-292102-
Kent MD-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Kent County in Maryland.

.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...Wednesday through Monday.

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.

MDZ015-292102-
Queen Annes-
0502 PM EDT Tue Sep 28 2021

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

.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...Wednesday through Monday.

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.

MDZ019-292102-
Talbot-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Talbot County in Maryland.

.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...Wednesday through Monday.

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.

MDZ020-292102-
Caroline-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for Caroline County in Maryland.

.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...Wednesday through Monday.

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.

ANZ430-292102-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for upper Delaware Bay.

.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...Wednesday through Monday.

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.

ANZ431-292102-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
0502 PM EDT Tue Sep 28 2021

This Hazardous Weather Outlook is for lower Delaware Bay.

.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...Wednesday through Monday.

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.

ANZ450-292102-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
0502 PM EDT Tue Sep 28 2021

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

.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...Wednesday through Monday.

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.

ANZ451-292102-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
0502 PM EDT Tue Sep 28 2021

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

.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...Wednesday through Monday.

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.

ANZ452-292102-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
0502 PM EDT Tue Sep 28 2021

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

.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...Wednesday through Monday.

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.

ANZ453-292102-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
0502 PM EDT Tue Sep 28 2021

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

.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...Wednesday through Monday.

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.

ANZ454-292102-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
0502 PM EDT Tue Sep 28 2021

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

.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...Wednesday through Monday.

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.

ANZ455-292102-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
0502 PM EDT Tue Sep 28 2021

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

.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...Wednesday through Monday.

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, Sep 28, 5:15 PM EST, 1 hour 17 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
615 PM EDT Tue Sep 28 2021

PAZ060-101-102-282300-
Western Chester PA-Eastern Chester PA-Berks PA-
615 PM EDT Tue Sep 28 2021

...A strong thunderstorm will impact portions of south central Berks
and northeastern Chester Counties through 700 PM EDT...

At 614 PM EDT, Doppler radar was tracking a strong thunderstorm over
Elverson, or 11 miles southeast of Reading, moving southeast at 25
mph.

HAZARD...Pea size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
West Chester, Phoenixville, Downingtown, Birdsboro, Honey Brook,
Elverson, New Morgan, Glenmoore, Chester Springs, Pughtown,
Lionville, Marshallton, Lionville-Marchwood, Spring City, Exton,
Lorane and Thorndale.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 296 and 320.
 Interstate 176 in Pennsylvania between mile markers 1 and 6.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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 4030 7586 4016 7552 4015 7552 4015 7550
      4014 7551 4013 7550 4013 7546 3992 7565
      4011 7593 4014 7588 4019 7595
TIME...MOT...LOC 2214Z 303DEG 21KT 4019 7584

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH

PO
Special weather statement, Sep 28, 6:14 PM EST, 18 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
714 PM EDT Tue Sep 28 2021

NJZ017-PAZ070-071-102-290000-
Gloucester NJ-Delaware PA-Eastern Chester PA-Philadelphia PA-
714 PM EDT Tue Sep 28 2021

...A strong thunderstorm will impact portions of northwestern
Gloucester, east central Chester, southwestern Philadelphia and
Delaware Counties through 800 PM EDT...

At 713 PM EDT, Doppler radar was tracking a strong thunderstorm over
Gradyville, or near West Chester, moving southeast at 30 mph.

HAZARD...Pea size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
Philadelphia, West Chester, Gloucester City, Chester, Deptford, West
Deptford, Bellmawr, Yeadon, Westtown, Woodbury, Pitman, Folcroft,
Swarthmore, Paulsboro, Westville, Woodbury Heights, National Park,
East Lansdowne, Swedesboro and Brooklawn.

This includes the following highways...
 New Jersey Turnpike near exit 2.
 Pennsylvania Turnpike near mile marker 321.
 Interstate 95 in Pennsylvania between mile markers 0 and 18.
 Interstate 76 in Pennsylvania between mile markers 347 and 350.
 Interstate 295 in New Jersey between mile markers 9 and 25.
 Interstate 476 in Pennsylvania between mile markers 0 and 10.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3994 7566 4008 7551 3990 7513 3987 7512
      3984 7509 3979 7507 3966 7521 3966 7523
      3968 7525 3969 7532 3973 7538 3978 7540
      3978 7544 3979 7541 3981 7542 3983 7552
TIME...MOT...LOC 2313Z 308DEG 24KT 3997 7551

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH

PO

The radar

The Philadelphia radar (KDIX), 90 km away, was scanning. The volume nearest the first event began at 23:32 UTC.

Open the radar archive at this moment

Event by event

1 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Delaware

When
September 28, 6:32 PM EST
Where
Delaware County, 0.87 mi SW of Aston Mills
Measured
50 kt (58 mph) estimated gust
Reported by
Trained Spotter
Coordinates
39.860, -75.460

Shingles were blown off a roof and minor tree damage occurred in Upper Chichester Twp. Time estimated from radar.

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Pennsylvania in 2021Every state in 2021This day in weather historyWarnings in Pennsylvania, September 2021

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 980038.