Pennsylvania, 2021

Hail and Damaging Winds in Pennsylvania, July 21, 2021

July 21, 2021 · NWS PHI · 23 events in 5 counties and zones

A strong cold front moved through the mid-Atlantic on July 21. Ahead of the front, an environment of moderate wind shear and seasonably warm and humid conditions promoted widespread thunderstorm development.

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
23

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 strong cold front moved through the mid-Atlantic on July 21. Ahead of the front, an environment of moderate wind shear and seasonably warm and humid conditions promoted widespread thunderstorm development. Storms mainly took the form of multi-cell clusters and quasi-linear segments. A number of storms became severe, posing a threat for both damaging winds and, thanks to cold air aloft, large hail as they moved towards the coast. With the front moving through during the mid to late afternoon hours, most of the storm activity was offshore by early evening, with cooler and drier weather behind the front.

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 Jul 21, 12:19 PM EST, 41 minutes earlier.

Area forecast discussion, Jul 21, 12:19 PM EST, 41 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
119 PM EDT Wed Jul 21 2021

.SYNOPSIS...
A cold front will move through the region today before moving
offshore tonight. High pressure will build across the region for
Thursday and Friday moving offshore over the weekend. Another
cold front will move through the area Monday night into Tuesday,
stalling to our south.

&&

.NEAR TERM /THROUGH TONIGHT/...
Severe Thunderstorm Watch 385 now in effect for most of the
region. Carbon and Monroe counties not included in the Watch.

A complex pattern setting up today with another round of severe
weather possible this afternoon. Hail and damaging winds will
be the primary threats.

An upper level through axis is centered near the United States/
Canadian border this morning, with mid-level flow around 30/40
kts. This seasonably strong trough axis is accompanied with a 50
m height fall and 30 m height rise couplet with a rather messy
upper level jet. This messy upper level jet is thanks to a piece
of energy that has broken off from the main upper level trough
axis and has actually closed off over southeast Texas. This
closed low will continue to retrograde underneath a mid-level
cyclone and hasten its collapse. As this occurs, the mid-level
wave over the east coast of the United States will sweep east
and keep a relatively neutral tilt as it does so. The core of
the DCVA appears to sweep across northern NJ, PA, and
south/central NY this afternoon with a rather impressive amount
of lift for the summer. In the low levels of the atmosphere, a
cold front is forecast to sweep across the region this
afternoon.

The mid-level wave will be quickly approaching from the west.
The DCVA will help to re-establish the lee side trough with
winds turning from the south/southwest over the coastal plain of
NJ and west across eastern PA. The CIN that was over the area
this morning is eroding, and SBCAPE values are rising to
1000-2000 J/kg across the northern half of the forecast area and
as high as 3000 J/kg in Delmarva. Low and mid-level lapse rates
are approaching 7 degrees C. The uncertainty with the forecast
today regards where will the convection initiate first. The are
two surface features which could serve as the impetus. The first
being the cold front, and the second being the lee side trough
(a potential, but less likely third, is an inland moving sea
breeze). The cold front being the impetus for CI does appear to
be a threat, esp given the backed winds thanks to the outflow.
Overall though, surface convergence along the front isn't
extremely impressive. The best surface convergence forecast
today is actually along the lee side trough. Given this, have
trended the forecast to have the highest chance of precipitation
to be over the Lehigh Valley and east. The end solution will
likely not be a binary one though (meaning one or another), but
rather an amalgamation of the two.

As the thunderstorms initiate, deep layer shear values are
forecast to be around 35 kts with a rather unidirectional wind
profile. These rather straight hodographs and deep layer shear
values favor a potential for some splitting supercells in the
warm sector. As the boundary approaches though, deep layer shear
values are boundary oblique with supercell motion being more
orthogonal to the boundary. Anvil-level storm-relative flow is
also boundary oblique. All of the above would favor discrete
cells initially (some splitting occurring), with upscale growth
soon thereafter. Steep lapse rates mentioned above will also
promote rapid updraft intensification. The primary threats with
these storms will be damaging wind gusts and large hail (rather
low WBZ heights).

Later this afternoon into evening, the cold front will sweep
through the region with PWATs falling rapidly from around 1.75"
to ~0.7" (near the 10th percentile for this time of year). The
rather impressive low level CAA for this time of year will
actually promote some wind gusts approaching 20 MPH behind the
frontal passage. Later in the evening, the PBL will begin to
decouple allowing a slow fall off of the gusts. Low temperature
tonight will be primarily in the low to mid 60s.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
High pressure begins to build in from the west, and CAA will be
underway and a drier airmass begins to spread into the region
Wednesday night. Lows will be in the 50s to the north and west
and in the 60s elsewhere. But of note, surface dew points will
begin to drop, generally from the mid and upper 60s in the
evening to the upper 50s and around 60 by daybreak Thursday.

Arguably the nicest day of the summer is on tap for Thursday as
high pressure builds into the Ohio Valley with abundant
sunshine. Northerly flow on the east side of that high ushers a
cooler airmass into the region. Highs will be a few degrees
below normal, topping off in the lower 80s, except for the
southern Poconos which will be in the 70s. Northern New Jersey
and the Lehigh Valley will be in the upper 70s to low 80s.

With afternoon mixing, dew points will drop into the mid 50s.
Which will feel quite autumnal compared to some of the days
that have occurred this July.

High pressure continues to build east Thursday night. Lows once
again in the 50s to the north and in the 60s elsewhere.

&&

.LONG TERM /SATURDAY THROUGH TUESDAY/...
The trough aloft moves offshore on Saturday as the surface high
starts to settle over the western Atlantic and we see a surface
trough develop over the Mid-Atlantic. Low pressure will pass to the
north of the area on Monday, dragging a cold front through our area
Monday night into Tuesday. The front may then stall nearby or just
to the south of area.

Several shortwaves will cross the region through the early part of
the week, keeping us unsettled with chances for showers and
thunderstorms. While there will be a chance for storms each day, the
majority of the time it will be dry and we are not expecting it to
be a total washout.

Temperatures will be more seasonable with highs in the mid to upper
80s (cooler to the north). As we head into the early part of the
week, the 90s may start creeping back in and dew points will be on
the rise, returning us to a slightly muggier air mass. Behind the
front, we should see dew points drop back down a little bit.

&&

.AVIATION /17Z WEDNESDAY THROUGH SUNDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Rest of this afternoon (18Z-00Z)...MVFR VSBY in HZ will
dissipate, and VSBY will become VFR. SHRA/TSRA with brief sub-
VFR conditions in +RA, hail, and potentially damaging winds.
Will carry TEMPO groups for convection until 21Z-22Z. W-NW winds
less than 10 kt, except higher in TSRA over terminals. Gusts to
20 kt possible for a few hours behind immediate passage of cold
front. High confidence in overall pattern, low confidence on
timing of TSRA passing over a given terminal.

Tonight (00Z-12Z)...VFR/becoming SKC. NW winds 5 kt or less.
High confidence.

Thursday (12Z-00Z)...VFR. NW winds less than 10 kt. High
confidence.

Outlook...

Thursday...Mostly VFR. West to northwest winds around 5 to 10 knots.
High confidence.

Friday...Mostly VFR. Sub-VFR conditions possible in isolated showers
and thunderstorms. Light west to northwest winds. High confidence
with low confidence on storms reaching the terminals.

Saturday...Mostly VFR. Sub-VFR conditions possible in showers and
thunderstorms. Southerly winds around 5 to 10 knots. High confidence
with low confidence on storms reaching the terminals.

Sunday...Mostly VFR. Sub-VFR conditions possible in scattered
showers and thunderstorms. Southwest winds around 10 to 15 knots.
Moderate confidence.

&&

.MARINE...
Today and tonight...Sub-SCA conditions expected with showers
and thunderstorms forming this afternoon into evening. Localized
higher winds and seas can be expected within any thunderstorms.
Mostly SW to W winds 10 to 15 knots then becoming W/NW late.

Outlook...

Thursday through Sunday...Sub-Small Craft Advisory conditions are
expected across the area waters. Scattered showers and thunderstorms
on Saturday and Sunday may produce locally higher winds and
waves.

Rip Currents...

Rest of today and Wednesday...Low with medium period waves and
limited seas.

&&

.TIDES/COASTAL FLOODING...
Limited minor flooding occurred on the tidal Delaware River
overnight but with the midday high tide being the lower of the high
tides, do not anticipate a similar occurrence through the rest of
today. There is the potential that tonight's high tide on the tidal
Delaware River may hit minor flooding again but should remain below
advisory levels.

As we move into the Thursday and Friday evening high tides, some
coastal areas could approach at least minor flood thresholds. The
full moon is on Friday which will lead to higher astronomical tides
Thursday and Friday, but there may also be enough of a down-shore
component to the wind to push enough water back toward land to
increase tidal levels, especially on Thursday.

&&

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

&&

Synopsis...Meola
Near Term...Haines/MPS
Short Term...Meola
Long Term...Meola
Aviation...Haines/Meola/MPS
Marine...Haines/Meola
Tides/Coastal Flooding...WFO PHI
Hazardous weather outlook, Jul 21, 11:03 AM EST, 1 hour 57 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
1203 PM EDT Wed Jul 21 2021

DEZ001-221603-
New Castle-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Friday.

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.

DEZ002-221603-
Kent-
1203 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for Kent County in Delaware.

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.
Minor coastal flooding is possible on Friday.

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.

DEZ003-221603-
Inland Sussex-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.

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.

DEZ004-221603-
Delaware Beaches-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.

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.

PAZ054-221603-
Carbon-
1203 PM EDT Wed Jul 21 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...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ055-221603-
Monroe-
1203 PM EDT Wed Jul 21 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...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ060-221603-
Berks-
1203 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for Berks County in Pennsylvania.

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ061-221603-
Lehigh-
1203 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for Lehigh County in Pennsylvania.

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ062-221603-
Northampton-
1203 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for Northampton County in
Pennsylvania.

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ070-221603-
Delaware-
1203 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for Delaware County in Pennsylvania.

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ071-221603-
Philadelphia-
1203 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for Philadelphia County in
Pennsylvania.

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ101-221603-
Western Chester-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ102-221603-
Eastern Chester-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ103-221603-
Western Montgomery-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ104-221603-
Eastern Montgomery-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ105-221603-
Upper Bucks-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

PAZ106-221603-
Lower Bucks-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.
Minor coastal flooding is possible on Friday.

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.

NJZ001-221603-
Sussex-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ007-221603-
Warren-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ008-221603-
Morris-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ009-221603-
Hunterdon-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ010-221603-
Somerset-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ012-221603-
Middlesex-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.
Minor coastal flooding is possible on Friday.

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.

NJZ013-221603-
Western Monmouth-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.

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.

NJZ014-221603-
Eastern Monmouth-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.
Minor coastal flooding is possible on Friday.

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.

NJZ015-221603-
Mercer-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ016-221603-
Salem-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Friday.

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.

NJZ017-221603-
Gloucester-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ018-221603-
Camden-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ019-221603-
Northwestern Burlington-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.
Minor coastal flooding is possible on Friday.

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.

NJZ020-221603-
Ocean-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.

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.

NJZ021-221603-
Cumberland-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.
Minor coastal flooding is possible on Friday.

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.

NJZ022-221603-
Atlantic-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ023-221603-
Cape May-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.
Minor coastal flooding is possible on Friday.

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.

NJZ024-221603-
Atlantic Coastal Cape May-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.
Minor coastal flooding is possible on Friday.

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.

NJZ025-221603-
Coastal Atlantic-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NJZ026-221603-
Coastal Ocean-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

Minor coastal flooding is possible on Thursday.
Minor coastal flooding is possible on Friday.

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.

NJZ027-221603-
Southeastern Burlington-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

MDZ012-221603-
Kent MD-
1203 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for Kent County in Maryland.

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

MDZ015-221603-
Queen Annes-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

MDZ019-221603-
Talbot-
1203 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for Talbot County in Maryland.

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

MDZ020-221603-
Caroline-
1203 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for Caroline County in Maryland.

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ430-221603-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
1203 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for upper Delaware Bay.

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ431-221603-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
1203 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for lower Delaware Bay.

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ450-221603-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ451-221603-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ452-221603-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ453-221603-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ454-221603-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
1203 PM EDT Wed Jul 21 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.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

ANZ455-221603-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
1203 PM EDT Wed Jul 21 2021

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

.DAY ONE...Through tonight.

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

   Severe Thunderstorm Watch.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Jul 21, 10:09 AM EST, 2 hours 51 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
1109 AM EDT Wed Jul 21 2021

NJZ008-211545-
Morris-
1109 AM EDT Wed Jul 21 2021

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN MORRIS COUNTY...

At 1109 AM EDT, a strong thunderstorm was located over Mendham, or
near Morristown, moving east at 35 mph.

Wind gusts up to 40 mph are possible with this storm.

Locations impacted include...
Morristown, Dover, Madison, Florham Park, East Hanover, Lincoln Park,
Chatham, Boonton, Rockaway, Morris Plains, Mendham, Mountain Lakes,
Peapack And Gladstone, Chester, Victory Gardens, Succasunna,
Succasunna-Kenvil, Parsippany, Bernardsville and Hanover Township.

This includes the following highways...
 Interstate 80 in New Jersey between mile markers 39 and 48.
 Interstate 287 in New Jersey between mile markers 31 and 48.

LAT...LON 4090 7427 4091 7434 4083 7433 4076 7438
      4075 7436 4069 7444 4069 7452 4070 7451
      4076 7456 4073 7466 4085 7469 4095 7428
      4092 7429
TIME...MOT...LOC 1509Z 259DEG 32KT 4078 7457

PO
Special weather statement, Jul 21, 11:41 AM EST, 1 hour 19 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
1241 PM EDT Wed Jul 21 2021

NJZ020-026-027-211715-
Coastal Ocean-Ocean-Southeastern Burlington-
1241 PM EDT Wed Jul 21 2021

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL OCEAN AND EAST
CENTRAL BURLINGTON COUNTIES...

At 1239 PM EDT, strong thunderstorms were clustered over Brookville,
or 17 miles south of Toms River, moving northeast at 10 mph.

Wind gusts up to 40 mph and pea size hail are possible with the
stronger storms.

Locations impacted include...
Barnegat, Brookville, Warren Grove, Penn State Forest, Beach Haven
West, Manahawkin, Ocean Acres and Waretown.

This includes Garden State Parkway between mile markers 60 and 74.

Some cloud to ground lightning is occurring and will also affect
some of the beaches. Lightning can strike 10 miles away from a
thunderstorm. Seek a safe shelter inside a building or vehicle.

LAT...LON 3965 7445 3980 7449 3989 7406 3968 7411
TIME...MOT...LOC 1639Z 246DEG 10KT 3976 7431

Gorse
Special weather statement, Jul 21, 12:08 PM EST, 52 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
108 PM EDT Wed Jul 21 2021

PAZ054-061-062-211745-
Lehigh-Northampton-Carbon-
108 PM EDT Wed Jul 21 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN LEHIGH...SOUTHERN
CARBON AND WEST CENTRAL NORTHAMPTON COUNTIES...

At 107 PM EDT, a strong thunderstorm was located near Hometown, or
near Tamaqua, moving southeast at 25 mph.

Wind gusts up to 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Allentown, Lehighton, Northampton, Palmerton, Jim Thorpe, Slatington,
Nesquehoning, Weatherly, Walnutport, New Mahoning, Neffs, Coffeetown,
New Tripoli, Berlinsville, Emerald, Claussville, Danielsville,
Beltzville State Park, Jordan Valley and Beersville.

This includes the following highways...
 Northeast Extension between mile markers 55 and 79.
 Interstate 78 in Pennsylvania between mile markers 52 and 55.

LAT...LON 4093 7596 4095 7590 4084 7548 4081 7547
      4082 7543 4081 7539 4056 7555 4069 7584
      4074 7576 4081 7587 4090 7598
TIME...MOT...LOC 1707Z 295DEG 22KT 4085 7591

NC
Special weather statement, Jul 21, 12:11 PM EST, 49 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
111 PM EDT Wed Jul 21 2021

NJZ009-PAZ061-062-105-211745-
Hunterdon-Upper Bucks-Lehigh-Northampton-
111 PM EDT Wed Jul 21 2021

...A STRONG THUNDERSTORM WILL AFFECT WEST CENTRAL HUNTERDON...
SOUTHEASTERN LEHIGH...NORTHWESTERN BUCKS AND SOUTHWESTERN NORTHAMPTON
COUNTIES...

At 111 PM EDT, a strong thunderstorm was located over Allentown,
moving southeast at 25 mph.

Wind gusts up to 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Allentown, Easton, Bethlehem, Emmaus, Northampton, Quakertown,
Bedminster, Hellertown, Dublin, Ferndale, Milford, Riegelsville,
Glendon, Pleasant Valley, Revere, Lehigh University, Ottsville,
Springtown, Old Orchard and Catasauqua.

This includes the following highways...
 Northeast Extension between mile markers 51 and 54.
 Interstate 78 in Pennsylvania between mile markers 56 and 74.

LAT...LON 4064 7519 4062 7519 4061 7520 4059 7519
      4063 7515 4060 7504 4036 7519 4054 7556
      4071 7547
TIME...MOT...LOC 1711Z 295DEG 21KT 4060 7544

NC
Local storm report, Jul 21, 12:19 PM EST, 41 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
119 PM EDT WED JUL 21 2021

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

0100 PM     TSTM WND GST     BEACH HAVEN             39.56N 74.24W
07/21/2021  M42 MPH          OCEAN              NJ   MESONET

0105 PM     HAIL             STRATFORD               39.83N 75.01W
07/21/2021  M1.00 INCH       CAMDEN             NJ   COCORAHS

&&
Local storm report, Jul 21, 12:31 PM EST, 29 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
131 PM EDT WED JUL 21 2021

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

0105 PM     HAIL             STAFFORD TWP.           39.74N 74.28W
07/21/2021  M1.00 INCH       OCEAN              NJ   COCORAHS

&&

The radar

The Philadelphia radar (KDIX), 139 km away, was scanning. The volume nearest the first event began at 18:02 UTC.

Open the radar archive at this moment

Event by event

12 thunderstorm wind, 11 hail. Local standard time, as filed.

Hail, Berks

When
July 21, 1:00 PM EST
Where
Berks County, 0.69 mi N of Muhlenberg Park
Measured
1 in hail
Reported by
Trained Spotter
Coordinates
40.410, -75.930

Hail, Lehigh

When
July 21, 1:05 PM EST
Where
Lehigh County, 0.52 mi E of Woodlawn
Measured
0.75 in hail
Reported by
Trained Spotter
Coordinates
40.620, -75.510

Thunderstorm Wind, Lehigh

When
July 21, 1:15 PM EST
Where
Lehigh County, 1.48 mi SSW of Allentown
Measured
55 kt (63 mph) estimated gust
Reported by
State Official
Coordinates
40.600, -75.490

Widespread tree damage was reported in West Allentown.

Thunderstorm Wind, Berks

When
July 21, 1:20 PM EST
Where
Berks County, Springmont
Measured
50 kt (58 mph) estimated gust
Reported by
Trained Spotter
Coordinates
40.330, -76.000

Photo of large tree branches down on wires in West Lawn PA. Time estimated by spotter.

Thunderstorm Wind, Lehigh

When
July 21, 1:20 PM EST
Where
Lehigh County, 0.87 mi NW of Summit Lawn
Measured
50 kt (58 mph) estimated gust
Reported by
Utility Company
Coordinates
40.580, -75.460

Wires were downed south of Allentown. Time estimated from radar.

Hail, Montgomery

When
July 21, 1:50 PM EST
Where
Montgomery County, 1.48 mi SSE of Schwenksville
Measured
0.88 in hail
Reported by
Trained Spotter
Coordinates
40.250, -75.460

Hail, Montgomery

When
July 21, 2:05 PM EST
Where
Montgomery County, Hartranft
Measured
1 in hail
Reported by
Public
Coordinates
40.150, -75.330

Thunderstorm Wind, Montgomery

When
July 21, 2:05 PM EST
Where
Montgomery County, Hartranft
Measured
70 kt (81 mph) estimated gust
Reported by
Public
Coordinates
40.150, -75.330

Numerous trees were downed in association with a strong microburst.

Thunderstorm Wind, Montgomery

When
July 21, 2:07 PM EST
Where
Montgomery County, 0.87 mi NW of West Pt
Measured
60 kt (69 mph) estimated gust
Reported by
Public
Coordinates
40.210, -75.290

Photo of a large tree down in Upper Gwynedd Twp. Time estimated from radar.

Hail, Montgomery

When
July 21, 2:10 PM EST
Where
Montgomery County, 0.87 mi NW of Marble Hall
Measured
1 in hail
Reported by
Trained Spotter
Coordinates
40.110, -75.280

Thunderstorm Wind, Montgomery

When
July 21, 2:10 PM EST
Where
Montgomery County, 0.69 mi S of Blue Bell
Measured
65 kt (75 mph) estimated gust
Reported by
Public
Coordinates
40.160, -75.280

Numerous trees down on wires in Whitpain Twp in association with a microburst. Time estimated from radar.

Hail, Montgomery

When
July 21, 2:11 PM EST
Where
Montgomery County, 1.06 mi E of Plymouth Vly
Measured
1 in hail
Reported by
Public
Coordinates
40.130, -75.300

Hail, Montgomery

When
July 21, 2:15 PM EST
Where
Montgomery County, 1.26 mi ESE of Blue Bell
Measured
1.25 in hail
Reported by
Public
Coordinates
40.160, -75.260

Photos relayed on social media of hail slightly larger than quarter size. Time estimated from radar.

Thunderstorm Wind, Montgomery

When
July 21, 2:15 PM EST
Where
Montgomery County, 0.53 mi E of Belfry
Measured
60 kt (69 mph) estimated gust
Reported by
Trained Spotter
Coordinates
40.170, -75.290

Numerous photos of large tree limbs down in the Center Square area of Blue Bell. Time estimated from radar.

Thunderstorm Wind, Montgomery

When
July 21, 2:20 PM EST
Where
Montgomery County, 0.53 mi E of Ft Washington
Measured
60 kt (69 mph) estimated gust
Reported by
Public
Coordinates
40.130, -75.210

Trees were downed near the PA Turnpike.

Hail, Montgomery

When
July 21, 2:25 PM EST
Where
Montgomery County, 0.87 mi SW of Oreland
Measured
1 in hail
Reported by
Public
Coordinates
40.110, -75.210

Report via social media with photo. Time estimated from radar.

Thunderstorm Wind, Montgomery

When
July 21, 2:28 PM EST
Where
Montgomery County, Baederwood
Measured
60 kt (69 mph) estimated gust
Reported by
Public
Coordinates
40.120, -75.120

A large tree was sheared apart in Abington Twp. Report via social media with a photo. Time estimated from radar.

Hail, Montgomery

When
July 21, 2:30 PM EST
Where
Montgomery County, Baederwood
Measured
1 in hail
Reported by
Trained Spotter
Coordinates
40.120, -75.120

Hail, Montgomery

When
July 21, 2:30 PM EST
Where
Montgomery County, 0.69 mi N of Ogontz
Measured
1 in hail
Reported by
Public
Coordinates
40.090, -75.130

Hail, Montgomery

When
July 21, 2:30 PM EST
Where
Montgomery County, 1.38 mi S of Ardsley
Measured
1 in hail
Reported by
Public
Coordinates
40.100, -75.150

Thunderstorm Wind, Philadelphia

When
July 21, 2:40 PM EST
Where
Philadelphia County, 1.73 mi ESE of Fox Chase
Measured
50 kt (58 mph) estimated gust
Reported by
Public
Coordinates
40.060, -75.050

Trees were downed on wires on Stanwood St in Rhawnhurst.

Thunderstorm Wind, Delaware

When
July 21, 2:40 PM EST
Where
Delaware County, 0.98 mi N of Trainer
Measured
50 kt (58 mph) estimated gust
Reported by
Fire Department/Rescue
Coordinates
39.844, -75.403

Wires were downed on Carter Ave in Chester Twp. Time estimated from radar.

Thunderstorm Wind, Philadelphia

When
July 21, 2:45 PM EST
Where
Philadelphia County, 1.26 mi WNW of Tacony
Measured
50 kt (58 mph) estimated gust
Reported by
Public
Coordinates
40.030, -75.050

Trees were downed near Vogt Recreation Center in Tacony. Time estimated from radar.

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
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, July 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: 965167, 965168, 965178, 965186, 965189, 965171, 965172, 965179, 965184, 965170, 965183, 965175, 965176, 965185, 965180, 965177, 965188, 965169, 965173, 965174, 965182, 965187, 965181.