A hot and humid air mass was in place over the mid-Atlantic on August 10. A lee side surface trough was present over central Pennsylvania.
Every event with a place to put it. Tap one for its entry below.
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.
The episode as NWS PHI wrote it up.
A hot and humid air mass was in place over the mid-Atlantic on August 10. A lee side surface trough was present over central Pennsylvania. This provided sufficient lift for thunderstorms to develop in the unstable air mass, and some organization into multi-cellular or linear clusters occurred. Despite limited shear, the strong instability allowed a number of storms to become strong to severe, producing damaging wind.
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 Aug 10, 9:21 AM EST, 5 hours 12 minutes earlier.
Area Forecast Discussion
National Weather Service Mount Holly NJ
1021 AM EDT Tue Aug 10 2021
.SYNOPSIS...
A lee-side trough will develop to the west of the Mid Atlantic
region today, before shifting eastward Wednesday through Friday.
A cold front is forecast to move across the east coast Friday
night into Saturday. High pressure build across the northeast
states late in the weekend into early next week.
&&
.NEAR TERM /THROUGH TONIGHT/...
Showers and tstms from earlier this morning which produced some
local flooding across Nrn Burlington County have diminished. We
are presently in a lull of precip as heating and dynamics are in
a minimum. Clouds have remained across the NW areas and also
across the Delaware Valley. Mostly sunny skies are across srn NJ
and Delmarva. Adjustments to the sky cover, temps and winds
have been performed for the late morning update.
As with move towards the afternoon it will resume feeling like
a warm summer day across the Mid Atlantic. We'll be looking at
warm/moist southerly flow prevailing over the area, between the
Bermuda High and the a low passing over the Great Lakes. Highs
should reach around 90, and with dewpoints in the low-mid 70s we
will likely see heat index values approaching 100 degrees.
However in these types of regimes, sometimes the heat is slower
to set in, and with more substantial heat concerns looking
likely later in the week we held off issuing an advisory for
today. Heading into the afternoon, a prefrontal trough moving
trough central PA and central NY will push some showers and
thunderstorms towards (mostly) our western locales.
Hot and humid conditions continue tonight as overnight lows
barely get into the low to mid 70s with dewpoints staying in the
70s throughout the evening and quickly increasing towards
daybreak. The solid southerly flow should be enough to prevent
any fog from forming overnight.
&&
.SHORT TERM /WEDNESDAY THROUGH FRIDAY/...
The Short Term period begins Wednesday with a weak mid-level
low continuing to push away from the area. Meanwhile, a low
amplitude mid-level trough will push slowly eastward from the
Dakotas toward the Great Lakes region through Thursday and close
off over the Hudson Bay as it does so. Southwesterly return
flow will result Wednesday and continue through the end of the
week with subtropical ridging extending from the western
Atlantic into the Southeast and strong low pressure across
Hudson Bay.
A few weak mid-level perturbations and surface troughing
developing from central/southeastern Pennsylvania into the upper
Delaware River Valley should be enough to initiate some diurnal
showers and thunderstorms Wednesday through Friday. Instability
should be highest on Thursday however (MLCAPE >2000 J/kg), so I
suspect Thursday will see the intensity of convection. An
approaching cold front and dynamic forcing will be in closer
proximity to the region Friday though, so coverage should be
greatest then. The column will be fairly saturated (not much in
the way of dry air layers) and effective shear should remain
limited (~20 kts or less), thus the organized severe threat
should remain limited. Nevertheless, some water-loaded wet
microbursts could be possible with the stronger cells leading to
at least some isolated severe potential. The latest CAM
guidance suggests the potential for a broken line of convection,
which seems reasonable given the parameters in place.
The bigger story remains the expected extended period of
excessive heat and humidity starting Wednesday through the end
of the week. Temperatures and dewpoints will be on the rise
starting Wednesday amid the southwesterly surface flow with
highs in the low to mid 90s for most and dewpoints in the low to
mid 70s. Resulting heat indicies Wednesday should climb above
100 degrees away from the coasts and higher terrain and some
areas, mainly across the urban corridor and Delmarva region, may
reach or exceed 105 degrees. By Thursday, the flow turns more
westerly introducing more downsloping into the equation and thus
temperatures should be a couple degrees warmer with most areas
forecast to see highs in the mid 90s. Resulting heat indicies
Thursday are forecast to rise into the low to mid 100s area wide
outside of the Poconos. There won't be much relief at night
with lows in the low to mid 70s for most. The lack of any low-
level dry air leads me to believe there won't be much in the way
of dewpoints mixing out unfortunately.
As of this update, we have upgraded the Excessive Heat Watch to
a Warning for Wednesday through Thursday and have issued Heat
Advisories elsewhere for locations currently expected to reach
or exceed their local criteria during the Wednesday and Thursday
periods. The hot and humid conditions area expected to linger
into Friday as well with highs in the low to mid 90s, dewpoints
in the low to mid 70s, and heat indices near 100. However,
confidence is not currently high enough (timing of approaching
cold front, cloud cover, and convection) to warrant extending
the current headlines through the Friday period. Speaking of
Friday, have maintained mention of higher end chance PoP for
areas along and north/west of I- 95 as this will be the area
with the greatest forcing and instability for convection.
Details of any potential severe weather threat remains a little
unclear at this point given differences in the timing of the jet
maxima and cold front to the north, but Friday could certainly
see a little more widespread coverage of thunderstorms and
severe weather potential given the synoptic setup.
&&
.LONG TERM /FRIDAY NIGHT THROUGH MONDAY/...
The mid-level trough axis and associated jet maxima will slowly
near and pass north of the area on Friday. An associated cold
front will also push toward the area from the north late Friday
into Saturday. As suspected, the guidance was a little too
progressive with the cold front and the cold front is now
expected to move through the area sometime Saturday. As a
result, have kept likely PoP in the forecast for Saturday.
Medium range guidance isn't very robust with instability, so I
think the severe/thunder threat will remain limited.
As the front stalls out near or just south of the area into
late Saturday into Sunday, chances for showers and thunderstorms
will remain for the remainder of the weekend and into Monday,
although thankfully with more seasonably temperatures.
&&
.AVIATION /14Z TUESDAY THROUGH SATURDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.
This afternoon...Lingering MVFR CIGS across the Delaware Valley
late this morning is expected to mix out by 16Z/17Z in these
areas. The lower CIGS across KRDG/KABE may take an hour or two
longer. Showers and tstms are expected to develop/arrive later
this afternoon with TEMPO groups for SHRA added in the late
latest AMDs. South winds (mostly) 5 to 10 knots becoming SW
locally.
Tonight...Generally VFR with light southerly flow anticipated.
Outlook...
Wednesday through Friday...Mainly VFR, but scattered showers and
thunderstorms are forecast during the afternoon and evening hours
which may locally lead to ceiling or visibility restrictions. The
greatest coverage of thunderstorms is forecast to be on Friday,
especially along and north/west of I-95. Southwesterly winds 5-10
kts during the day and 5 kts or less at night. High confidence on
the overall pattern.
Saturday...Sub-VFR restrictions probable in widespread showers and
thunderstorms. Westerly around 5 kts. Moderate confidence.
&&
.MARINE...
Sub-SCA conditions are expected through Tuesday night with seas
only 2-3ft and generally southerly winds gusting 15-20kts. An
occasional gust up to 25kt is possible but not over a duration
that would warrant issuing an SCA. Showers and thunderstorms
associated with a weak convergent boundary will like impact the
Atlantic coastal waters through the early morning before
dissipating.
Outlook...
Wednesday through Saturday...Sub-advisory conditions area forecast
through the remainder of the week. South to southwesterly winds 10-
15 kts with some gusts up to 20 kts possible during the daytime
hours. Afternoon and/or evening showers and thunderstorms possible,
mainly Friday and especially Saturday. Seas mainly 2-3 feet.
Rip Currents...
There is a low risk of rip currents through at least Wednesday.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Excessive Heat Warning from noon Wednesday to 8 PM EDT
Thursday for PAZ070-071-101>106.
Heat Advisory from noon Wednesday to 8 PM EDT Thursday for
PAZ060>062.
NJ...Excessive Heat Warning from noon Wednesday to 8 PM EDT
Thursday for NJZ008>010-012-013-015-017>020-027.
Heat Advisory from noon Wednesday to 8 PM EDT Thursday for
NJZ001-007-014-016-021-022-026.
DE...Excessive Heat Warning from noon Wednesday to 8 PM EDT
Thursday for DEZ001.
Heat Advisory from noon Wednesday to 8 PM EDT Thursday for
DEZ002-003.
MD...Heat Advisory from noon Wednesday to 8 PM EDT Thursday for
MDZ012-015-019-020.
MARINE...None.
&&
Synopsis...Staarmann
Near Term...PO/Staarmann/Deal
Short Term...Staarmann
Long Term...Staarmann
Aviation...Deal/O'Brien/Staarmann/PO
Marine...Deal/StaarmannHazardous Weather Outlook National Weather Service Mount Holly NJ 1057 AM EDT Tue Aug 10 2021 DEZ001-111457- New Castle- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for New Castle County in Delaware. .DAY ONE...Through tonight. Hot conditions could result in heat exhaustion with prolonged exposure. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. DEZ002-111457- Kent- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Kent County in Delaware. .DAY ONE...Through tonight. Minor coastal flooding is possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure 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. DEZ003-111457- Inland Sussex- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for inland portions of Sussex County in Delaware. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure 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. DEZ004-111457- Delaware Beaches- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for the Atlantic coastal portions of Sussex County in Delaware. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...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. PAZ054-111457- Carbon- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Carbon County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ055-111457- Monroe- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Monroe County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ060-111457- Berks- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Berks County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ061-111457- Lehigh- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Lehigh County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ062-111457- Northampton- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Northampton County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ070-111457- Delaware- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Delaware County in Pennsylvania. .DAY ONE...Through tonight. Hot conditions could result in heat exhaustion with prolonged exposure. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ071-111457- Philadelphia- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Philadelphia County in Pennsylvania. .DAY ONE...Through tonight. Hot conditions could result in heat exhaustion with prolonged exposure. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ101-111457- Western Chester- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for western Chester County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ102-111457- Eastern Chester- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for eastern Chester County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ103-111457- Western Montgomery- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for western Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Hot conditions could result in heat exhaustion with prolonged exposure. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ104-111457- Eastern Montgomery- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for eastern Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Hot conditions could result in heat exhaustion with prolonged exposure. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ105-111457- Upper Bucks- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for upper Bucks County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. PAZ106-111457- Lower Bucks- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for lower Bucks County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ001-111457- Sussex- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Sussex County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ007-111457- Warren- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Warren County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ008-111457- Morris- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Morris County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ009-111457- Hunterdon- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Hunterdon County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ010-111457- Somerset- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Somerset County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure 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. NJZ012-111457- Middlesex- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Middlesex County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ013-111457- Western Monmouth- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for western Monmouth County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ014-111457- Eastern Monmouth- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for eastern Monmouth County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ015-111457- Mercer- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Mercer County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ016-111457- Salem- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Salem County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ017-111457- Gloucester- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Gloucester County in New Jersey. .DAY ONE...Through tonight. Hot conditions could result in heat exhaustion with prolonged exposure. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ018-111457- Camden- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Camden County in New Jersey. .DAY ONE...Through tonight. Hot conditions could result in heat exhaustion with prolonged exposure. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ019-111457- Northwestern Burlington- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for northwestern Burlington County in New Jersey. .DAY ONE...Through tonight. Hot conditions could result in heat exhaustion with prolonged exposure. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ020-111457- Ocean- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for inland portions of Ocean County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ021-111457- Cumberland- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Cumberland County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ022-111457- Atlantic- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for inland portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ023-111457- Cape May- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Cape May County excluding the Atlantic coast 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. NJZ024-111457- Atlantic Coastal Cape May- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for the Atlantic coastal portions of Cape May 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. NJZ025-111457- Coastal Atlantic- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for coastal portions of Atlantic 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. NJZ026-111457- Coastal Ocean- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for coastal portions of Ocean County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. NJZ027-111457- Southeastern Burlington- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for southeastern Burlington County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure 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. MDZ012-111457- Kent MD- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Kent County in Maryland. .DAY ONE...Through tonight. Hot conditions could result in heat exhaustion with prolonged exposure. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure 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. MDZ015-111457- Queen Annes- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Queen Annes County in Maryland. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure 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. MDZ019-111457- Talbot- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Talbot County in Maryland. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure 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. MDZ020-111457- Caroline- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for Caroline County in Maryland. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure 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. ANZ430-111457- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for upper Delaware Bay. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...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. ANZ431-111457- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for lower Delaware Bay. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...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. ANZ450-111457- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Monmouth County out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...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. ANZ451-111457- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Ocean County out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...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. ANZ452-111457- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Atlantic County out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...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. ANZ453-111457- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Cape May County out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...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. ANZ454-111457- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- 1057 AM EDT Tue Aug 10 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. 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. ANZ455-111457- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 1057 AM EDT Tue Aug 10 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Sussex County out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...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.
Special Weather Statement
National Weather Service Mount Holly NJ
207 PM EDT Tue Aug 10 2021
NJZ016-017-101845-
Salem NJ-Gloucester NJ-
207 PM EDT Tue Aug 10 2021
...A strong thunderstorm will impact portions of northwestern Salem
and west central Gloucester Counties through 245 PM EDT...
At 207 PM EDT, Doppler radar was tracking a strong thunderstorm over
Salem, or 10 miles south of Wilmington, moving northeast at 15 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Pennsville, Carneys Point, Salem, Woodstown, Alloway, Quinton and
Beckett.
This includes the following highways...
New Jersey Turnpike near exit 1.
Interstate 295 in New Jersey between mile markers 1 and 10.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3979 7537 3956 7521 3953 7554 3961 7556
3961 7555 3963 7557
TIME...MOT...LOC 1807Z 238DEG 14KT 3959 7549
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
SFJSpecial Weather Statement
National Weather Service Mount Holly NJ
306 PM EDT Tue Aug 10 2021
PAZ060-101930-
Berks PA-
306 PM EDT Tue Aug 10 2021
...A strong thunderstorm will impact portions of northwestern Berks
County through 330 PM EDT...
At 306 PM EDT, Doppler radar was tracking a strong thunderstorm near
Pine Grove, or 8 miles north of Myerstown, moving east at 20 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Reading, Wyomissing, Sinking Spring, Womelsdorf, Wernersville,
Robesonia, Bernville, Strausstown, Fairview Hgts, Spring Ridge,
Wyomissing Hills, West Lawn, Whitfield and West Wyomissing.
This includes Interstate 78 in Pennsylvania between mile markers 10
and 28.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4052 7634 4052 7625 4054 7617 4056 7613
4057 7608 4058 7606 4058 7605 4032 7595
4034 7619 4036 7621 4037 7623 4049 7643
TIME...MOT...LOC 1906Z 251DEG 19KT 4049 7635
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
SFJSpecial Weather Statement
National Weather Service Mount Holly NJ
333 PM EDT Tue Aug 10 2021
PAZ060-102000-
Berks PA-
333 PM EDT Tue Aug 10 2021
...A strong thunderstorm will impact portions of central Berks County
through 400 PM EDT...
At 332 PM EDT, Doppler radar was tracking a strong thunderstorm over
Strausstown, or 8 miles northeast of Myerstown, moving east at 25
mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Reading, Wyomissing, Hamburg, Sinking Spring, Laureldale, Womelsdorf,
Wernersville, Robesonia, Leesport, Shoemakersville, Bernville,
Strausstown, Fairview Hgts, Spring Ridge, Shillington, West Reading,
Mohnton, Kenhorst, Centerport and Wyomissing Hills.
This includes Interstate 78 in Pennsylvania between mile markers 16
and 35.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4052 7627 4054 7617 4057 7608 4058 7606
4057 7602 4063 7599 4066 7591 4017 7593
4031 7614 4036 7621 4039 7628
TIME...MOT...LOC 1932Z 272DEG 16KT 4046 7618
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
SFJThe State College radar (KCCX), 158 km away, was scanning. The volume nearest the first event began at 19:35 UTC.
24 thunderstorm wind. Local standard time, as filed.
A tree was downed on Route 183. Time estimated from radar.
A tree and wires were downed on Golf Course Rd. Time estimated from radar.
Tree limbs were downed on wires near Sheeprock Rd. Likely associated with outflow winds. Time estimated from radar.
A tree was downed on Long Lane Rd. Likely associated with outflow winds.
County dispatch reported about 5 instances of downed trees and limbs over the southern portion of Lehigh County. Time estimated from radar.
There were a few reports of downed trees and power outages near Easton. Time estimated from radar.
A few shingles were blown off along with two inch diameter limbs. Time estimated from radar.
Trees and wires were downed on Doe Run Rd. Time estimated from radar.
A downed tree blocked the southbound US-1 ramp onto PA-472. Time estimated from radar.
A downed tree blocked the roadway near the intersection of Harvest Dr and Ingleside Dr. Time estimated from radar.
A tree was downed onto wires near the intersection of Sunset Hollow Rd and Grove Rd. Time estimated from radar.
A tree and wires were downed on Susan Ln near Arlington Ave. Time estimated from radar.
A tree and wires were downed near Sellers Ave at Industrial Hwy. Time estimated from radar.
Downed wires blocked Pomeroy Ave at State St. Time estimated from radar.
Trees and wires were downed on Springhill Rd. Time estimated from radar.
A downed tree blocked all of Egypt Run Rd near Newark Rd. Time estimated from radar.
Downed tree limbs blocked most of Unionville Rd at Gatehouse Dr. Time estimated from radar.
A downed tree partially blocked Reynolds Rd near Spring Benny Run. Time estimated from radar.
Downed tree limbs blocked Brintons Bridge Rd at Dilworthtown Rd. Time estimated from radar.
Tree limbs and other storm debris were downed onto Lancaster Ave at Woodview Dr. Time estimated from radar.
A tree and wires were downed near the intersection of Rutgers Ave at Harvard Ave. Time estimated from radar.
Wires were downed on Academy Ave near Glen Circle. Time estimated from radar.
A tree and wires were downed near Eisenhower Ave at Catherine Ave. Time estimated from radar.
A tree and wires were downed near the intersection of Bishop Ave and Broadway Ave. Time estimated from radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2021Every state in 2021This day in weather historyWarnings in Pennsylvania, August 2021
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: 971965, 971969, 971964, 971968, 971971, 971972, 971997, 971977, 971999, 971974, 971982, 971976, 971978, 972001, 971975, 971990, 971989, 971983, 971984, 971998, 971981, 971996, 971988, 971979.