After a significant heatwave, a cold front approached the mid-Atlantic on July 1, 2021. A potent mid-level trough was also digging southward through southern Ontario and into the Great Lakes region, and a strong upper level jet streak was present downstream the trough axis, over the interior mid-Atlantic and northern New England.
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.
After a significant heatwave, a cold front approached the mid-Atlantic on July 1, 2021. A potent mid-level trough was also digging southward through southern Ontario and into the Great Lakes region, and a strong upper level jet streak was present downstream the trough axis, over the interior mid-Atlantic and northern New England. This strong upper level forcing combined with the approaching front and a lingering warm, moist air mass ahead of it caused widespread thunderstorm development on July 1. Storms occurred almost exclusively south of Interstate 78, in the environment of best instability. A number of storms became severe, taking the form of mainly linear and multi-cellular clusters but with some embedded supercellular characteristics. Straight line wind damage was the primary hazard, with a number of reports of downed trees and power outages due to winds. With the cold front remaining to the west, some storm activity continued into the overnight, but storm coverage and intensity gradually waned with the loss of daytime heating and the overturning of the atmosphere from earlier storms.
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 1, 3:06 PM EST, 1 hour earlier.
Area Forecast Discussion
National Weather Service Mount Holly NJ
406 PM EDT Thu Jul 1 2021
.SYNOPSIS...
A cold front will settle into the area tonight and linger near the
east coast through Friday. Several waves of low pressure will
develop along this front and impact the area as it settles across
the area, then shifts offshore Friday night and Saturday. A surface
trough is forecast to impact the area Saturday into Saturday night,
before the system and moves away from the area Sunday. A surface
trough is likely to develop and may impact the Mid Atlantic region
early next week, while high pressure builds across the southeast
states. Another cold front is forecast to impact the area around the
middle of next week.
&&
.NEAR TERM /THROUGH FRIDAY NIGHT/...
A mid level trough will continue to to dig south out of Quebec
as it intensifies and eventually becomes a closed low. A surface
cold front will continue to approach our region eventually
arriving and moving through our region tonight. The combination
of these two features, along with the still very moist air mass
in place will lead to widespread showers and a few thunderstorms
continuing through the overnight hours, though the prime period
for thunderstorms and significant impacts looks to be through
late this evening.
Severe Thunderstorms: The advertised line of showers and
thunderstorms is moving into the Philly metro and Delmarva areas
as of 4 PM. This activity is forecast to continue to moving
slowly eastward toward the coast around 30-35 mph, and the
severe threat should be over by around 8 PM. The main threat
from these storms will be damaging winds, however large hail and
a brief tornado cannot be ruled out. The Severe Thunderstorm
Watch will thus continue until then for portions of the area.
Heavy rain/flash flooding: As mentioned above, thanks to the
maritime tropical airmass already in place over our region,
precipitable water values remain well above normal (12Z RAOBs
from around the region show values nearing 2 inches).
Additionally, the cold front is nearly stalled or at least very
slow moving. Meanwhile, mid and upper level flow is mostly
parallel to the orientation of the front. This sets the stage
for training storms. By the time this develops, it appears that
the best lift is along and east of the fall line. Did not make
any changes to the flash flood watch at this time as the threat
for heavy rain is lower west of the current watch, and although
heavy rain is a concern south and east of the watch, flash flood
guidance remains quite high in these areas, limiting the risk
for flash flooding. Periods of heavy rain showers are forecast
to continue overnight including the risk for flash flooding,
but should begin moving offshore toward daybreak.
Patchy fog is possible overnight, especially near or north of
I-78, but my confidence was not high enough to include it in
the forecast at this time. Lows will be in the mid to upper 60s.
For Friday, The upper closed low will be nearly overhead. With
surface based instability and a low freezing level, scattered
showers and possibly a few thunderstorms are forecast to develop
across the region. This convection may be able to produce pea
sized hail in any of the more robust updrafts that develop.
Otherwise, expect a mostly cloudy day with temperatures
struggling to warm to around 80 degrees.
&&
.SHORT TERM /SATURDAY THROUGH SATURDAY NIGHT/...
Unsettled weather will continue For the first half of the weekend,
with a chance of showers and thunderstorms from Friday night
through Saturday night.
The cold front that settled into the area Thursday night and Friday
is expected to shift offshore Friday night. Meanwhile, several areas
of low pressure will develop near the area and move along this
frontal boundary Friday night into Saturday night. As these low
pressure systems move along the front, a couple of surface troughs
may develop on the backside of the lows and move across the Mid
Atlantic region during this period. As the mid/upper trough swings
into the region, several short wave/vorticity impulses will move
across the area as well, which will interact with some enhanced
moisture associated with the surface trough across the area. This is
expected to lead to a chance of showers and thunderstorms, some
which may still produce moderate to heavy rainfall at times a PW
values remain near an inch. Temperatures Friday night through
Saturday night are expected to be below normal as the mid/upper
trough settles into the area, and northerly surface flow will
prevent a significant warm up.
&&
.LONG TERM /SUNDAY THROUGH THURSDAY/...
By Sunday, the low will be pulling farther away from the area,
however, the unsettled weather potential will continue into next
week. The flow aloft will turn to the northwest on Sunday and
Monday, before shifting to the west and become more zonal on
Tuesday. However, with the northwest flow and westerly flow, several
short wave/vorticity impulses will move across the area each day,
which could help contribute to a chance of isolated to scattered
showers and thunderstorms each day as a lee-side/thermal trough may
develop and provide a focus for storms to form.
By Wednesday, another cold front is forecast to approach the area
from the west and northwest, which could provide another chance of
showers and thunderstorms. However, this front may stall near the
area and continue to lead to a chance of showers and thunderstorms
into Thursday.
Temperatures will begin to rebound Sunday, and return to above
normal for Monday through Thursday, especially Tuesday and Wednesday.
There remain questions in regards to what happens with what is now
Tropical Storm Elsa. The GFS and Canadian bring it across the
southeastern states, and eventually near the Mid Atlantic region.
However, the ECMWF does not show the storm. The official NHC track
goes out 5 days and brings the storm near Florida on Tuesday. We
will continue to monitor the forecast over the next week to
determine if we will have any impacts from the storm.
&&
.AVIATION /20Z THURSDAY THROUGH TUESDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.
Through 00Z...Prevailing VFR should continue through around
21Z, but MVFR ceilings are expected to move in during and
behind the line of showers and thunderstorms currently moving
into the area. This line of showers and thunderstorms should
impact most if not all terminals through around 22Z. Winds will
remain mostly around 5 kts or less and generally favoring a
westerly direction. Moderate confidence on the overall pattern,
but low confidence on exact details.
Tonight...Ceilings should lower to IFR after 00Z across much of
the region. Moderate to at times heavy showers should generally
move east of the TAF sites after 06Z. Areas of fog will be
possible, especially for any locations that receive heavy rain
today. Winds will be light and variable but direction should
favor southwesterly. Moderate confidence.
Friday... MVFR/IFR conditions still appear likely to start the
day around 12Z on Friday, especially near and east of PHL.
Latest indications are that VFR conditions will likely be
prevailing for much of the later morning, afternoon, and
evening. However, areas of sub-VFR remain possible through the
day and night due to scattered showers and thunderstorms.
Westerly winds around 5 kts. Moderate confidence.
Outlook...
Friday night...MVFR or IFR conditions expected with a chance of
showers and thunderstorms. West winds 5-10 knots, becoming variable
during the evening, then northwest overnight. Locally higher winds
near near thunderstorms. Low confidence.
Saturday-Saturday night...MVFR or IFR conditions possible. A chance
of showers and thunderstorms, especially during the day. North to
northwest winds 5-10 knots, becoming light and variable overnight.
Locally higher winds near near thunderstorms. Low confidence.
Sunday-Sunday night...Mostly VFR conditions expected. A slight
chance of showers and thunderstorms during the afternoon. West to
northwest winds 5-10 knots, with occasional gusts around 15-20 knots
during the afternoon, becoming light and variable overnight. Locally
higher winds near near thunderstorms. Moderate confidence.
Monday-Monday night...VFR conditions expected. West to northwest
winds 5-10 knots early, shifting to southwest during the day.
Moderate confidence.
&&
.MARINE...
For most of the area waters, seas and winds should stay below Small
Craft Advisory conditions through tonight. However, locally higher
seas and winds will be possible in the vicinity of any thunderstorms
especially this afternoon and evening.
For the Atlantic coastal waters from Cape May NJ to Fenwick Island
DE, a period of wind gusts above 25 kt is likely this
afternoon with seas nearing 5 feet. Therefore, the SCA will
continue until 8 PM EDT.
Outlook...
Friday night-Monday night...Conditions are expected to remain mostly
below advisory levels with wind gusts remaining below 25 knots.
However, seas will linger around 3-4 feet, and may approach 5 feet
at times, especially Saturday. There is a chance of showers and
thunderstorms, which may lead to locally higher winds and waves.
Tuesday...There is a chance of Small Craft Advisory conditions
as winds could approach 25 knots and seas could approach 5 feet.
Rip Currents...
South to southwest winds continue into Friday. There should be a
short to medium period southerly swell both days. The more favorably
oriented central/southern New Jersey coast has a MODERATE risk for
rip currents, while a LOW risk remains for Delaware and for the
Monmouth County coast.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flash Flood Watch through Friday morning for PAZ070-071-
101>106.
NJ...Flash Flood Watch through Friday morning for NJZ009-010-012-
013-015>019.
DE...Flash Flood Watch through Friday morning for DEZ001.
MD...None.
MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ454-
455.
&&
Synopsis...Robertson
Near Term...Johnson/Staarmann
Short Term...Robertson
Long Term...Robertson
Aviation...Johnson/Robertson/Staarmann
Marine...Johnson/Robertson/StaarmannHazardous Weather Outlook National Weather Service Mount Holly NJ 0406 PM EDT Thu Jul 01 2021 DEZ001-022006- New Castle- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for New Castle County in Delaware. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ002-022006- Kent- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Kent County in Delaware. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ003-022006- Inland Sussex- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for inland portions of Sussex County in Delaware. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ004-022006- Delaware Beaches- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for the Atlantic coastal portions of Sussex County in Delaware. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. PAZ054-022006- Carbon- 0406 PM EDT Thu Jul 01 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...Friday through Wednesday. 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. PAZ055-022006- Monroe- 0406 PM EDT Thu Jul 01 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...Friday through Wednesday. 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. PAZ060-022006- Berks- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Berks County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. PAZ061-022006- Lehigh- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Lehigh County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. PAZ062-022006- Northampton- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Northampton County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. PAZ070-022006- Delaware- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Delaware County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. PAZ071-022006- Philadelphia- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Philadelphia County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. PAZ101-022006- Western Chester- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for western Chester County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. PAZ102-022006- Eastern Chester- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for eastern Chester County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. PAZ103-022006- Western Montgomery- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for western Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. PAZ104-022006- Eastern Montgomery- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for eastern Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. PAZ105-022006- Upper Bucks- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for upper Bucks County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. PAZ106-022006- Lower Bucks- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for lower Bucks County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ001-022006- Sussex- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Sussex County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. NJZ007-022006- Warren- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Warren County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. NJZ008-022006- Morris- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Morris County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. NJZ009-022006- Hunterdon- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Hunterdon County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. NJZ010-022006- Somerset- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Somerset County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. NJZ012-022006- Middlesex- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Middlesex County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ013-022006- Western Monmouth- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for western Monmouth County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ014-022006- Eastern Monmouth- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for eastern Monmouth County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ015-022006- Mercer- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Mercer County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. NJZ016-022006- Salem- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Salem County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ017-022006- Gloucester- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Gloucester County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. NJZ018-022006- Camden- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Camden County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. NJZ019-022006- Northwestern Burlington- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for northwestern Burlington County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ020-022006- Ocean- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for inland portions of Ocean County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ021-022006- Cumberland- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Cumberland County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ022-022006- Atlantic- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for inland portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. NJZ023-022006- Cape May- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Cape May County excluding the Atlantic coast in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. NJZ024-022006- Atlantic Coastal Cape May- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for the Atlantic coastal portions of Cape May County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. There is a moderate risk of rip currents. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. There is a moderate risk of rip currents 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. NJZ025-022006- Coastal Atlantic- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for coastal portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. There is a moderate risk of rip currents. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. There is a moderate risk of rip currents 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. NJZ026-022006- Coastal Ocean- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for coastal portions of Ocean County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. There is a moderate risk of rip currents. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. There is a moderate risk of rip currents 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. NJZ027-022006- Southeastern Burlington- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for southeastern Burlington County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. MDZ012-022006- Kent MD- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Kent County in Maryland. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. MDZ015-022006- Queen Annes- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Queen Annes County in Maryland. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. MDZ019-022006- Talbot- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Talbot County in Maryland. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. MDZ020-022006- Caroline- 0406 PM EDT Thu Jul 01 2021 This Hazardous Weather Outlook is for Caroline County in Maryland. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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. ANZ430-022006- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- 0406 PM EDT Thu Jul 01 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...Friday through Wednesday. 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. ANZ431-022006- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- 0406 PM EDT Thu Jul 01 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...Friday through Wednesday. 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. ANZ450-022006- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- 0406 PM EDT Thu Jul 01 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...Friday through Wednesday. 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. ANZ451-022006- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- 0406 PM EDT Thu Jul 01 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...Friday through Wednesday. 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. ANZ452-022006- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- 0406 PM EDT Thu Jul 01 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...Friday through Wednesday. 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. ANZ453-022006- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- 0406 PM EDT Thu Jul 01 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...Friday through Wednesday. 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. ANZ454-022006- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- 0406 PM EDT Thu Jul 01 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...Friday through Wednesday. 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. ANZ455-022006- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 0406 PM EDT Thu Jul 01 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...Friday through Wednesday. 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
110 PM EDT Thu Jul 1 2021
NJZ013-014-020-026-011800-
Eastern Monmouth-Coastal Ocean-Ocean-Western Monmouth-
110 PM EDT Thu Jul 1 2021
...A STRONG THUNDERSTORM WILL AFFECT NORTHERN OCEAN AND MONMOUTH
COUNTIES...
At 110 PM EDT, a strong thunderstorm was located over Vista Center,
or 15 miles northwest of Toms River, moving northeast at 45 mph.
Wind gusts up to 50 mph and pea size hail are possible with this
storm.
Locations impacted include...
Toms River, Long Branch, Asbury Park, Lakewood, Jackson, Howell,
Marlboro, Manalapan, Tinton Falls, Holmdel, Red Bank, Manasquan,
Highlands, Point Pleasant Beach, Lakehurst, Farmingdale, Roosevelt,
Mantoloking, Allenwood and East Freehold.
This includes the following highways...
Interstate 195 in New Jersey between mile markers 13 and 34.
Garden State Parkway between mile markers 87 and 112.
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4043 7396 4012 7397 4001 7398 4001 7452
4007 7455 4025 7447 4041 7400 4041 7398
4042 7398
TIME...MOT...LOC 1710Z 247DEG 39KT 4019 7434
DavisSpecial Weather Statement National Weather Service Mount Holly NJ 116 PM EDT Thu Jul 1 2021 NJZ020-022-025>027-011745- Coastal Atlantic-Coastal Ocean-Ocean-Atlantic-Southeastern Burlington- 116 PM EDT Thu Jul 1 2021 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL ATLANTIC...SOUTH CENTRAL OCEAN AND SOUTHEASTERN BURLINGTON COUNTIES... At 115 PM EDT, a strong thunderstorm was located over Elwood-Magnolia, or 14 miles east of Vineland, moving east at 40 mph. Wind gusts up to 50 mph and pea size hail are possible with this storm. Locations impacted include... Egg Harbor City, Tuckerton, Weymouth, Port Republic, Pomona, Elwood-Magnolia, Wading River, Warren Grove, Bass River State Forest, Batsto, New Gretna, Mizpah, Mays Landing, Mystic Island and Folsom. This includes the following highways... Garden State Parkway between mile markers 41 and 62. Atlantic City Expressway between mile markers 13 and 25. If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. LAT...LON 3946 7484 3958 7482 3977 7433 3945 7421 TIME...MOT...LOC 1715Z 251DEG 33KT 3954 7473 Davis
Special Weather Statement
National Weather Service Mount Holly NJ
131 PM EDT Thu Jul 1 2021
NJZ021-023-011800-
Cumberland-Cape May-
131 PM EDT Thu Jul 1 2021
...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN CUMBERLAND AND
NORTHWESTERN CAPE MAY COUNTIES...
At 130 PM EDT, a strong thunderstorm was located over Bivalve, or 12
miles south of Millville, moving east at 20 mph.
Wind gusts up to 40 mph and pea size hail are possible with this
storm.
Locations impacted include...
Woodbine, Mauricetown, Belleplain Forest, Leesburg, Goshen, Bivalve,
Port Norris, Dividing Creek and Eldora.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
LAT...LON 3914 7485 3918 7518 3929 7512 3931 7480
3931 7479
TIME...MOT...LOC 1730Z 275DEG 19KT 3920 7506
CMSSpecial Weather Statement
National Weather Service Mount Holly NJ
251 PM EDT Thu Jul 1 2021
DEZ001-PAZ060-061-070-101>103-105-011930-
New Castle-Upper Bucks-Lehigh-Western Montgomery-Delaware-Western
Chester-Eastern Chester-Berks-
251 PM EDT Thu Jul 1 2021
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN NEW CASTLE...
SOUTHEASTERN BERKS...SOUTHEASTERN LEHIGH...NORTHWESTERN MONTGOMERY...
WEST CENTRAL BUCKS...CHESTER AND WEST CENTRAL DELAWARE COUNTIES...
At 251 PM EDT, a strong thunderstorm was located over New Morgan, or
9 miles south of Reading, moving east at 55 mph.
Wind gusts up to 50 mph and pea size hail are possible with this
storm.
Locations impacted include...
Reading, West Chester, Pottstown, Phoenixville, Coatesville, Emmaus,
Westtown, Wyomissing, Downingtown, Kennett Square, Birdsboro,
Collegeville, Oxford, Royersford, Laureldale, Parkesburg, Trappe,
East Greenville, West Grove and Honey Brook.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 324.
Northeast Extension between mile markers 37 and 52.
Interstate 78 in Pennsylvania between mile markers 61 and 62.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 3976 7606 3987 7599 3995 7600 4004 7593
4011 7594 4014 7588 4023 7602 4036 7598
4057 7541 4021 7537 4018 7541 4016 7540
4011 7543 4010 7546 4009 7544 3972 7565
3972 7613
TIME...MOT...LOC 1851Z 249DEG 49KT 4020 7591
DavisThe Dover AFB radar (KDOX), 80 km away, was scanning. The volume nearest the first event began at 21:07 UTC.
10 thunderstorm wind. Local standard time, as filed.
Power lines were downed near Alloway Friesburg Rd. Time estimated from radar.
Wires were downed on Grand Ave. Time estimated from radar.
Wires were downed near Crosswick Creek Steam Valley in Cream Ridge. Time estimated from radar.
Several reports of power lines down in the area. Time estimated from radar.
Wires were downed on Locust Trail in Browns Mills. Time estimated from radar.
Wires were downed near Dennisville-Petersburg Rd in Petersburg. Time estimated from radar.
A few reports of downed trees and wires near Dutch Lane Rd and Austen Ct. Time estimated from radar.
Several reports of downed wires in Brick Twp and the Leisure Village area. Time estimated from radar.
Several reports of downed power lines in the Wanamassa and Deal areas. Time estimated from radar.
A couple reports of tree limbs down into wires near Hopewell Twp. Time estimated from radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New Jersey in 2021Every state in 2021This day in weather historyWarnings in New Jersey, July 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: 959057, 959053, 959060, 959058, 959062, 959061, 959054, 959056, 959055, 959059.