A warm front was draped across northern Pennsylvania and far northern New Jersey on July 12. South of the front, a very warm and unstable air mass was present.
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 warm front was draped across northern Pennsylvania and far northern New Jersey on July 12. South of the front, a very warm and unstable air mass was present. An approaching trough also helped spur the development of a weak wave of low pressure, which tracked along the front during the afternoon and evening hours. This helped add some forcing and shear to an already unstable air mass. The result was scattered to widespread thunderstorm development along and south of the front during the peak heating hours. Some of the storms became severe, with a number of instances of damaging wind across the region. Storm coverage gradually decreased in the evening hours as heating and forcing were lost.
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 12, 2:47 PM EST, 3 hours 42 minutes earlier.
Area Forecast Discussion
National Weather Service Mount Holly NJ
347 PM EDT Mon Jul 12 2021
.SYNOPSIS...
A warm front across northern New Jersey and eastern Pennsylvania
today will lift to the north on Tuesday. Strong high pressure
remains anchored off the Southeast and Mid-Atlantic coasts for much
of the week as several disturbances eject out ahead of an upper
level low over the Midwest. Offshore high pressure breaks down late
this week, and then a cold front slowly works its way through the
region next weekend.
&&
.NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...
**Severe Thunderstorm Watch number 374 is in effect.**
Very unsettled conditions are expected for the remainder of this
afternoon into the evening and first half of the overnight period. A
frontal boundary that is currently draped across northern New
Jersey and northern Pennsylvania will slowly sag southward
through the rest of this afternoon and into this evening and
overnight. Meanwhile, multiple outflow boundaries and sea
breezes and bay breezes are moving across the forecast area this
afternoon. Scattered showers and thunderstorms have already
begun to develop across the area, and will continue to develop
and spread across the area through this afternoon as a short
wave/vorticity impulse moves across the area. A very unstable
airmass is in place with temperatures well into the mid-upper
80s and lower 90s for some areas, combined with dewpoints in the
low to mid 70s. CAPE values of at least 2000-3000 J/kg are in
place across the area. Shear values are relatively weak with
effective bulk shear values of 20-25 knots. However, with the
amount of instability, very strong updrafts are expected, which
when combine with DCAPE values of 800-1000 J/kg could lead to
areas of strong, damaging winds. While there are fairly large
CAPE values above the freezing level, the freezing level and
wet-bulb zero height are pretty high, so while widespread large
hail may not occur, there could be some isolated large hail
mixed in with more likely sub-severe hail. This convection will
continue through the afternoon and into this evening, before
another round of showers and thunderstorms develop to our west
and move into the area in association with another short
wave/vorticity impulse move into the area. Heavy rainfall will
continue to be a threat for the remainder of this afternoon and
into this evening as PW values remain near 2 inches for much of
the area. The Flash Flood Watch will remain in place into the
overnight hours due to the high moisture content and the slow
motion expected with the storms.
Once the short wave/vorticity impulse passes to our northeast
overnight, the threat for showers and thunderstorms will diminish.
However, as the front begins to stall, areas of patchy fog may
develop north of the boundary, especially where rain falls this
afternoon and tonight. Widespread dense fog is not expected, but a
few locations of locally dense fog cannot be ruled out.
&&
.SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/...
The first half of Tuesday is expected to be dry, although areas of
fog will continue to linger through the morning hours. Once the low
clouds and fog burn off and lift, another unstable day is expected
on Tuesday. The frontal boundary will remain in place across the
area during the day, which will again provide a focus for showers
and thunderstorms to develop. PW values lower below 2 inches, but
still remain near 1.75 inches, so heavy rain will continue to be a
threat. CAPE values approach 2000-3000 J/kg along and south and west
of the boundary while shear values again approach 20-25 knots.
Strong updrafts, combined with DCAPE values of 1000 J/kg or more
could again lead to some strong to damaging winds. While there are
fairly large CAPE values above the freezing level, the freezing
level and wet-bulb zero height are pretty high, so while widespread
large hail may not occur, there could be some isolated large hail
mixed in with more likely sub-severe hail.
Any showers and thunderstorms that develop during the afternoon and
evening hours will dissipate and move to the northeast as
instability wanes and lift associated with a weak afternoon short
wave moves to the northeast.
&&
.LONG TERM /WEDNESDAY THROUGH MONDAY/...
No changes made to the long term.
Another hot and humid day on tap for Wednesday, but the offshore
high begins to break down late Wednesday and Wednesday night. A cold
front with an upper trough approaches from the west Wednesday and
begins to work its way through the region.
Weak high pressure passes through the region Thursday and Thursday
night resulting in a nearly rain-free day.
On Friday, another cold front approaches from the west. Convection
will develop late Friday and Friday evening as it passes through the
region. The cold front is a slow mover so it will take a couple days
to make its way through the region with several rounds of
showers. rs and thunderstorms. The front may not clear the
region until Sunday. The front will become stationary along the
Mid-Atlantic going into the new week.
High temperatures will be in the lower 90s through Saturday, and
then behind the cold front, highs will be in the mid and upper 80s
on Sunday, and then possibly a few degrees cooler than that on
Monday.
&&
.AVIATION /20Z MONDAY THROUGH SATURDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.
Rest of today...VFR conditions are in place across the TAF sites.
However, this improvement will only be temporary as showers and
thunderstorms are expected to continue to develop across the area
during the remainder of the afternoon into this evening. Any showers
or thunderstorms will likely lead to temporary lower conditions.
Winds will remain south to southwest 5-10 knots with gusts 15-20
knots, before becoming variable later this afternoon as a front
begins to shift southward. Locally higher winds will occur in
thunderstorms. Moderate confidence overall but low confidence on
exact placement and timing of convection.
Tonight...VFR conditions will begin the evening outside of showers
and thunderstorms which will likely lead to temporary lower
conditions. MVFR then IFR ceilings are expected to develop and move
into the area through the evening and into the overnight. ACY and
MIV may be the only sites that do now drop below VFR. Patchy fog
will also likely develop overnight for many areas that receive rain
will reduce visibilities overnight. Variable winds begin the period,
before shifting to more east or southeast 5-10 knots later this
evening and overnight. Moderate confidence.
Tuesday...IFR conditions likely begin the period from PHL northward,
with MVFR or VFR south. Ceilings lift to MVFR by midday, and may
eventually return to VFR during the afternoon.
There is a chance of showers and thunderstorms for eastern
Pennsylvania and northern New Jersey during the afternoon, which may
lead to temporary lower conditions. Light and variable winds for
much of the morning, becoming south to southeast 5-10 knots for many
areas except southern New Jersey, central/southern Delaware, and
eastern Maryland which may be south to southwest. Moderate
confidence.
Tuesday night...Once any showers or thunderstorms end, VFR
conditions are expected to prevail through the overnight for most
areas. Southeast winds 5-10 knots, may become light and variable
overnight.
Outlook...
Wednesday through Saturday...Overall, a VFR forecast most of the
time. Afternoon and evening SHRA/TSRA, mainly along and west of the
I-95 corridor terminals will result in temporary sub-VFR conditions
should a storm pass over a given terminal. Confidence is moderate.
&&
.MARINE...
Rest of today-Tuesday night...Conditions are expected to remain
below Small Craft Advisory levels through Tuesday night. However,
winds could occasionally gust around 20 knots and seas will
remain around 3-4 feet. There is a chance of showers and
thunderstorms which will lead to locally higher winds and waves.
Outlook...
Wednesday through Saturday...Overall, sub-SCA conditions. E-SE
winds on Tuesday, W-SW winds 10-20 kt Wednesday and Thursday,
S-SW winds 10-20 knots Friday and Saturday. Seas 3-4 feet. The
chances for showers and thunderstorms are better inland as
opposed to the waters, but showers and thunderstorms are
possible in the late afternoon and early evening. Limited
chances on Thursday.
Rip Currents...
There is a Moderate risk for the development of dangerous rip
currents today with southerly winds increasing from 20 to 25
knots and wave heights from 2 to 4 feet.
Winds will vary between southerly for the southern half of the
New Jersey coast and Delaware coasts. for the northern half of
the New Jersey coast, winds may be more easterly through the
day. Meanwhile, waves are expected to be from 2 to 3 feet, thus
we are expecting a Moderate risk for rip currents to continue
into Tuesday for the New Jersey coast and Delaware Beaches.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flash Flood Watch through late tonight for PAZ054-055-060>062-
070-071-101>106.
Heat Advisory until 8 PM EDT Tuesday for PAZ070-071-104-106.
NJ...Flash Flood Watch through late tonight for NJZ001-007>010-012-
013-015-017>019.
Heat Advisory until 8 PM EDT Tuesday for NJZ017>019.
Heat Advisory until 8 PM EDT this evening for NJZ020-027.
DE...Heat Advisory until 8 PM EDT Tuesday for DEZ001.
MD...Heat Advisory until 8 PM EDT Tuesday for MDZ012-015-019-020.
MARINE...None.
&&
Synopsis...Franklin/MPS
Near Term...Robertson
Short Term...Robertson
Long Term...Franklin/MPS
Aviation...Franklin/MPS
Marine...Franklin/MPS/RobertsonHazardous Weather Outlook National Weather Service Mount Holly NJ 0352 PM EDT Mon Jul 12 2021 DEZ001-131952- New Castle- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for New Castle County in Delaware. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ002-131952- Kent- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Kent County in Delaware. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. DEZ003-131952- Inland Sussex- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for inland portions of Sussex County in Delaware. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. DEZ004-131952- Delaware Beaches- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for the Atlantic coastal portions of Sussex County in Delaware. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ054-131952- Carbon- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Carbon County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ055-131952- Monroe- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Monroe County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ060-131952- Berks- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Berks County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ061-131952- Lehigh- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Lehigh County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ062-131952- Northampton- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Northampton County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ070-131952- Delaware- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Delaware County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ071-131952- Philadelphia- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Philadelphia County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ101-131952- Western Chester- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for western Chester County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. 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. PAZ102-131952- Eastern Chester- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for eastern Chester County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. 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. PAZ103-131952- Western Montgomery- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for western Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. 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. PAZ104-131952- Eastern Montgomery- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for eastern Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ105-131952- Upper Bucks- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for upper Bucks County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ106-131952- Lower Bucks- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for lower Bucks County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ001-131952- Sussex- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Sussex County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ007-131952- Warren- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Warren County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ008-131952- Morris- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Morris County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ009-131952- Hunterdon- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Hunterdon County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ010-131952- Somerset- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Somerset County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ012-131952- Middlesex- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Middlesex County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. 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. NJZ013-131952- Western Monmouth- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for western Monmouth County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ014-131952- Eastern Monmouth- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for eastern Monmouth County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ015-131952- Mercer- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Mercer County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. 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. NJZ016-131952- Salem- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Salem County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ017-131952- Gloucester- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Gloucester County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ018-131952- Camden- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Camden County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ019-131952- Northwestern Burlington- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for northwestern Burlington County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Flash Flood Watch. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ020-131952- Ocean- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for inland portions of Ocean County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. 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. NJZ021-131952- Cumberland- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Cumberland County in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ022-131952- Atlantic- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for inland portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ023-131952- Cape May- 0352 PM EDT Mon Jul 12 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...Tuesday through Sunday. 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. NJZ024-131952- Atlantic Coastal Cape May- 0352 PM EDT Mon Jul 12 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...Tuesday through Sunday. 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. NJZ025-131952- Coastal Atlantic- 0352 PM EDT Mon Jul 12 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...Tuesday through Sunday. 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. NJZ026-131952- Coastal Ocean- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for coastal portions of Ocean County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. 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. NJZ027-131952- Southeastern Burlington- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for southeastern Burlington County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. 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. MDZ012-131952- Kent MD- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Kent County in Maryland. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MDZ015-131952- Queen Annes- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Queen Annes County in Maryland. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MDZ019-131952- Talbot- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Talbot County in Maryland. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MDZ020-131952- Caroline- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for Caroline County in Maryland. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ430-131952- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for upper Delaware Bay. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. ANZ431-131952- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- 0352 PM EDT Mon Jul 12 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...Tuesday through Sunday. 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. ANZ450-131952- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Monmouth County out 20 nm. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Widespread dense fog is possible on Tuesday. 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. ANZ451-131952- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- 0352 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Ocean County out 20 nm. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. ANZ452-131952- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- 0352 PM EDT Mon Jul 12 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...Tuesday through Sunday. 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. ANZ453-131952- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- 0352 PM EDT Mon Jul 12 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...Tuesday through Sunday. 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. ANZ454-131952- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- 0352 PM EDT Mon Jul 12 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...Tuesday through Sunday. 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. ANZ455-131952- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 0352 PM EDT Mon Jul 12 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...Tuesday through Sunday. 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.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
701 PM EDT MON JUL 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0640 PM FLASH FLOOD 1 N COOPERSTOWN 40.06N 74.90W
07/12/2021 BURLINGTON NJ COUNTY OFFICIAL
WATER RESCUE AT NORTH GARDEN BOULEVARD AND
IVY ROAD.
&&
PFPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
704 PM EDT MON JUL 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 PM FLASH FLOOD 1 NNW BRISTOL 40.11N 74.86W
07/12/2021 BUCKS PA FIRE DEPT/RESCUE
SEVERAL INSTANCES OF PEOPLE TRAPPED IN HOMES
NEAR THE 500 SECTION OF BRISTOL PIKE.
&&
JEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
706 PM EDT MON JUL 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0639 PM FLASH FLOOD PALMYRA 40.00N 75.03W
07/12/2021 BURLINGTON NJ COUNTY OFFICIAL
WATER RESCUE AT INTERSECTION OF SPRING
GARDEN AND FILBERT STREET.
&&
PFPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
708 PM EDT MON JUL 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0656 PM FLASH FLOOD 1 NE EDGEWATER PARK 40.05N 74.91W
07/12/2021 BURLINGTON NJ COUNTY OFFICIAL
WATER RESCUE AT 120 ELM STREET.
&&
PFPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
719 PM EDT MON JUL 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0710 PM FLASH FLOOD BRISTOL 40.10N 74.85W
07/12/2021 BUCKS PA PUBLIC
WATER RESCUES AT THE LAFAYETTE GARDENS
CONDOMINIUM.
&&
JEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
724 PM EDT MON JUL 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0718 PM FLASH FLOOD 1 WNW EASTWICK 39.90N 75.26W
07/12/2021 DELAWARE PA FIRE DEPT/RESCUE
WATER RESCUE ON HOOK RD AT INDUSTRIAL DR.
&&
JEOThe Dover AFB radar (KDOX), 99 km away, was scanning. The volume nearest the first event began at 23:27 UTC.
2 thunderstorm wind. Local standard time, as filed.
A couple reports of downed wires were received near Rogers Rd and New Castle Ave. Time estimated from radar.
A couple reports were received of downed wires near 10th St. Time estimated from radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Delaware in 2021Every state in 2021This day in weather historyWarnings in Delaware, 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: 961866, 961865.