Alert archive / New Jersey / Special Marine Warnings in 2021
Special Marine Warning 132, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special marine warning at Sep 1, 2021, 6:14 PM EDT. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 1, 2021, 6:14 PM EDT (22:14 UTC)
- Expired
- Sep 1, 2021, 7:15 PM EDT
- In force
- 61 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 40.0 mph
The radar
The Dover AFB radar (KDOX), 52 km from the middle of the area, began a volume at 22:14 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.2 hours before the alert went out and 148 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 515 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 955 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
The text
As transmitted.
379
WHUS51 KPHI 012214
SMWPHI
ANZ430-431-012315-
/O.NEW.KPHI.MA.W.0132.210901T2214Z-210901T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
614 PM EDT Wed Sep 1 2021
The National Weather Service in Mount Holly NJ has issued a
* Special Marine Warning for...
Delaware Bay...
* Until 715 PM EDT.
* At 614 PM EDT, severe thunderstorms capable of producing
waterspouts were located along a line extending from 7 nm southwest
of Ship John Shoal Light to Bowers Beach to near Slaughter Beach,
moving northeast at 30 knots.
HAZARD...Waterspouts and wind gusts to 40 knots.
SOURCE...Radar.
IMPACT...Waterspouts can easily overturn boats and create locally
hazardous seas. Small craft could be damaged in briefly
higher winds and suddenly higher waves.
* Locations impacted include...
Fortesque Beach, Sea Breeze, Fourteen Foot Bank Light, Slaughter
Beach, East Point, Bowers Beach, Miah Maull Light, Ship John Shoal
Light, Brandywine Shoal Light and Cross Ledge Light.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM EDT for central and
southern Delaware...southern New Jersey...and the adjacent coastal
waters.
Move to safe harbor immediately as gusty winds and high waves are
expected.
&&
LAT...LON 3948 7535 3943 7534 3946 7520 3935 7518
3932 7512 3927 7513 3926 7507 3941 7509
3943 7501 3932 7491 3923 7495 3921 7488
3914 7483 3886 7531 3894 7541 3899 7539
3903 7546 3918 7547 3922 7553
TIME...MOT...LOC 2214Z 229DEG 30KT 3919 7545 3906 7539 3889 7540
WATERSPOUT...POSSIBLE
HAIL...0.00IN
WIND...40KTS
$$
StaarmannWhat forecasters said that day
The local office's own words before this special marine warning went out, 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 this special marine warning went out at Sep 1, 3:51 PM EDT, 2 hours 23 minutes earlier.
Area forecast discussion, Sep 1, 3:51 PM EDT, 2 hours 23 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
351 PM EDT Wed Sep 1 2021
.SYNOPSIS...
The remnants of Ida which are across Maryland late this afternoon
will cross our forecast area this evening. The remnant low will
continue to lift to the northeast tonight, moving into New England
on Thursday. High pressure will build in behind the departing low
on Friday. A cold front will approach from the west on Sunday,
crossing the area Sunday night into Monday.
&&
.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
Significant flash flood and severe weather event arriving now
and will continue for much of the evening...
Update...
A Tornado Watch continues for most of the area until 10PM
tonight. The severe weather/tornado threat continues to look
concerning heading into the evening with an unusually potent
overlap of shear, forcing, and instability. The highest threat
is still expected across our southern zones, but some risk may
exist as far north as the Lehigh Valley and north- central New
Jersey.
Regarding rainfall, the axis of heavy rain has definitely been
on the northwest periphery of expectations so far. Areas such as
the Poconos are well on their way to significant rainfall
totals. Am a little concerned amounts may end up lower in and
around the urban corridor; they will need some very high rain rates
late this afternoon and evening to reach the forecast amounts
there. However, CAM guidance suggests hourly rates of 2 to 3
inches per hour are not out of the question, so a significant
flash flood threat still exists at least as far southeast as
I-95 based on the rain rate potential alone. At least another
couple of mostly dry hours are likely for the southeastern half
of the area, but rain will fill in by mid to late afternoon.
Valid portions of previous discussion follow...
The remnants of Ida will continue to affect the region through
tonight, with significant impacts expected for the area. Model
trends continue a slight northward nudge of the highest QPF
axis, with the GFS/NAM/ECMWF in good agreement that 3+ inches of
rainfall will occur near/northwest of the Fall Line (with
embedded totals 6+ inches somewhere in the southern Poconos
and/or Lehigh Valley and vicinity). The CMC remains farther
south (almost to outlier status), with the main axis generally
between I-76 and I-80. The convection-allowing models (CAMs) are
in between, and these are generally in line with our current
thinking this morning.
However, the risk of flash flooding is not only tied to total
rainfall but also duration, and the CAM solutions would suggest that
much of the rainfall south of the high-QPF axis will be occurring in
a relatively short period of time. Excessive rainfall rates (via PWs
well north of 2 inches) are likely with the main convective show
late this afternoon into the early overnight hours, and will likely
lead to several instances of flash flooding near the urban corridor.
Therefore, despite somewhat lowered QPF for the I-95 corridor
southeastward, the risk of flash flooding remains quite elevated
because of the rainfall rates. The HREF guidance provides some
insight here, with the 00z ensembles indicating probabilities of 1-h
rainfall accumulations exceeding flash flood guidance (FFG) above 50
percent in virtually all areas northwest of I-95 in our CWA during
the evening hours, despite a range of 3-5 inches in total QPF.
Notably, the probabilities of 6-h rainfall accumulations exceeding
FFG are above 90 percent in much of the same area, which conveys the
seriousness of the flooding threat for our area quite well.
Of course, that is not all. With the warm sector expected to shift
northward into at least the southern half of the CWA, the ambient
preconvective environment will be quite favorable for severe
weather. Model soundings indicate MLCAPE 1000-2000 J/kg (closer to
500-1000 J/kg near the warm front), 0-6 km bulk shear nearing 40 kt,
and SRH > 200 J/kg in the late afternoon and early evening hours.
This is an environment supportive of rotating storms, with CAM
simulations suggesting a mixed mode of short line segments and
cellular storms. Damaging wind gusts and tornadoes are the main
threats, and the SPC has nudged the enhanced risk slightly farther
north given model trends this morning. Given the coverage of
convection expected, the favorable environment is quite concerning,
with the severe potential continuing to look more and more
impressive. The main time window for severe weather is likely in the
21z to 06z time frame from west to east. Individual cells will
likely move quickly north-northeast, but the overall system will
move only slowly eastward, so training convection poses a flash
flood risk in the southern half of the CWA.
Models continue to trend faster with precipitation moving out of the
region, with most areas likely drying out by daybreak Thursday.
&&
.SHORT TERM /6 AM THURSDAY MORNING THROUGH 6 PM THURSDAY/...
High pressure will build into the region on Thursday in the wake of
the departing system. The entire region is expected to dry out
during the morning, with partly to mostly sunny skies during the
afternoon. For this reason, have ended the flash flood watch for the
area at 8 am, as little or no precipitation is expected after that
time.
Main concern is winds, with a stiff north breeze likely for much
of the day, especially near the coast. However, the speed of the
system will likely keep the period of elevated winds rather short,
and the forecast speeds are not overly impressive anyway (10 to 20
mph sustained winds with occasional gusts 25+ mph). Forecast highs
are expected to be in the 70s for most of the area. This will likely
be a welcome reprieve from the frequent bouts of heat we have dealt
with the past few months.
&&
.LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/...
No changes to the long term for the afternoon. The previous
discussion remains valid.
Behind the departing remnant surface low that once was Ida, we should
see cooler and drier conditions across our region. The upper level
low will remain nearby Thursday night but should start to lift to
the northeast late Thursday night. The more northerly flow will
allow for cooler air to move across the Mid-Atlantic and we should
have a relatively nice night in store for our area. Temperatures
will be around 5-8 degrees below normal with overnight lows dropping
into the 50s across much of the region. Along the immediate coast,
temps may remain in the lower 60s, while some of the colder spots
in the southern Poconos may actually dip into the upper 40s.
High pressure builds in for Friday and through the holiday weekend.
Daytime temps will generally be in the 70s with a gradual warming
trend from day to day. Overnight lows will also moderate as they
warm from the 50s/low 60s on Friday night to the upper 50s to mid
60s on Saturday and Sunday nights.
A cold front may approach the region late in the weekend, crossing
the region Sunday into Monday. Some showers may accompany the front
as it moves through the area. Conditions should then dry out for
later Monday and much of Tuesday.
&&
.AVIATION /20Z WEDNESDAY THROUGH MONDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.
This afternoon and evening...Conditions should deteriorate, with
prolonged MVFR/IFR at RDG/ABE with heavy rain and occasional thunderstorms.
For the Philly terminals and MIV/ACY, a round of strong to severe
thunderstorms is probable, with timing generally in the 20z to
03z window. Torrential downpours and strong wind gusts are likely.
Winds outside of storms will likely be easterly or southeasterly
5 to 15 kt with gusts to 25 kt. Notably, directions will become
more erratic after 00z as the surface low begins to move through
the region. Moderate overall confidence; low confidence on
exact timing of storms and category changes.
Late tonight and Thursday...Rapid improvement expected as the rain/storms
move east out of the region. Winds will become north to northwest
10 to 20 kt with gusts 25+ kt possible. Moderate confidence.
Outlook...
Thursday night through Friday...Mainly VFR. North-northwest winds
around 10 to 15 knots. High confidence.
Saturday through Sunday...Mainly VFR. West to southwest winds around
5 to 10 knots. High confidence.
&&
.MARINE...
Low pressure approaching the waters this evening and steep
pressure falls have created strong and gusty winds across the
Chesapeake Bay late this afternoon. This, along with tstms,
will soon arrive across our waters, a Gale was raised bit
earlier and will go into effect at 4 PM. The SCA remains for the
upper DE Bay, but Gale gusts are possible there too, but confid
is not great for prolonged Gales. No doubt SMW's will be issued
through the evening for the waters. Inexperienced boaters are
advised to get to port now. Stay safe.
As the low tracks through the waters late tonight, there should
be a relative lull as winds become variable. Then as the low
moves offshore, stiff northerly winds are likely to develop.
Another period of gale-force gusts is expected for the New
Jersey waters during the morning before rapidly diminishing
during the afternoon. Gale warnings have been issued to cover
these threats. Seas will be elevated through Thursday, primarily
between 5 to 8 feet.
Regarding storm chances, they should increase quickly during the
day, with a round of strong to severe storms possible from late
afternoon into the overnight hours. Waterspouts, strong wind gusts,
and torrential downpours are possible.
Outlook...
Thursday night through Friday... North to northwest winds around 15
to 20 knots will continue to drop overnight into Friday. While a few
gusts around 25 knots can't be ruled out, most gusts look to remain
below 25 knots. Seas will remain elevated into Thursday night and
will gradually drop through the night into early Friday. Some
lingering 5 foot seas are possible, especially across the southern
waters into midday Friday but expect most of the ocean waters to
fall to 3 to 4 feet on Friday.
Friday night through Sunday... Mainly sub-SCA conditions expected.
North to northwest winds around 10 to 15 knots becoming southerly
Saturday night and more southwesterly on Sunday.
Rip Currents...
A MODERATE risk of rip currents is expected for the beaches of
New Jersey and Delaware the rest of today. By late this evening,
the rip current risk will be HIGH on the New Jersey coast,
likely continuing through much of the day Thursday, as swell
only slowly diminishes as the low moves offshore. The risk will
likely remain moderate for the Delaware beaches through
Thursday.
&&
.HYDROLOGY...
Flooding has commenced across the Lehigh Valley, Berks County, the
southern Poconos, Chester County, Delaware County and New Castle
County in northern Delaware. Eventually the rain will pivot across
the entire I95 corridor and into NJ.
Expected rainfall totals increased late last night and this morning.
As a result, crests also increased. The only meaningful changes for
this afternoon lies just north and west of the I95 corridor. The
heaviest rain and associated gradient has been shifted north and
west. This has had an influence on some of the updated afternoon
river forecasts across SE PA and northern NJ, basically dropping some
forecast points by a category (e.g. major to moderate).
Climatologically, August is supposed to be a quiet month in regards
to flooding and severe weather. It was quite the opposite. Parts of
the region got hit with Fred. A larger part of the area got hit with
Henri. In between, rounds of thunderstorms produced flash flooding.
1/3rd of days in August had at least 1 Flash Flood Warning issued.
This has left much of the HSA very wet. Except for SW NJ, all the
other counties we serve are either running above or much above
normal in terms of rainfall. Grounds were saturated leading up this
upcoming event.
Although there have some changes in rainfall amounts, the
Schuylkill, Passaic, and Raritan Rivers are still all forecast to
flood in the moderate to major categories. In addition, the mainstem
Delaware River is still forecast to flood. Although the rain has
shifted north across the Delaware Basin, crests haven't changed
much. In short, instead of the rain falling locally over portions of
the lower Delaware, the rain is now falling to the north, but still
has to flow through lower region forecast points.
Trenton saw flooding in both 2014 and 2018, but during the winter
due to ice jams. The last time Trenton has flooded strictly from a
rain event was in 2011.
Please refer to our AHPS webpage for river observations (courtesy of
the USGS) and our forecasts...
https://water.weather.gov/ahps2/index.php?WFO=phi
Please refer to the inundation maps at the following link.
Inundation maps have been developed for many forecast points along
the Delaware River and across both the Raritan and Passaic
river basins.
water.weather.gov/ahps/inundation.php
&&
.TIDES/COASTAL FLOODING...
With the passage of the remnants of Ida through Thursday, tidal
levels will likely be elevated. However, with the faster timing
of the low's passage through the area, the highest surges on
Chesapeake Bay and on the Atlantic coast will likely be
occurring during low tides rather than high tides. As a result,
only spotty minor flooding at most is expected at this time.
&&
.CLIMATE...
Record Maximum Daily Rainfall Records for:
9/1 9/2
Site Record/Year Record/Year
ABE 4.06/1952 1.63/2006
ACY 2.18/2006 2.40/1951
55N 2.35/2006 1.43/2017
PHL 1.80/1952 1.89/2013
ILG 1.73/1952 2.95/1910
RDG 3.50/1952 2.24/2006
TTN 3.84/1940 2.05/2006
MPO 4.54/1952 2.30/1926
GED 6.22/2002 2.47/1998
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flash Flood Watch through Thursday afternoon for PAZ054-055-
060>062-070-071-101>106.
NJ...Flash Flood Watch through Thursday afternoon for NJZ001-
007>010-012>027.
High Rip Current Risk from 8 PM EDT this evening through
Thursday evening for NJZ014-024>026.
DE...Flash Flood Watch through Thursday afternoon for DEZ001>004.
MD...Flash Flood Watch through Thursday afternoon for MDZ012-015-
019-020.
MARINE...Gale Warning until noon EDT Thursday for ANZ450>453.
Gale Warning until 8 AM EDT Thursday for ANZ431-454-455.
Small Craft Advisory until 6 PM EDT Thursday for ANZ430.
&&
Synopsis...WFO PHI
Near Term...WFO PHI
Short Term...WFO PHI
Long Term...Meola
Aviation...WFO PHI
Marine...WFO PHI
Hydrology...Krudzlo
Tides/Coastal Flooding...WFO PHI
Climate...WFO PHIHazardous weather outlook, Sep 1, 4:59 PM EDT, 1 hour 15 minutes before
Hazardous Weather Outlook National Weather Service Mount Holly NJ 0459 PM EDT Wed Sep 01 2021 DEZ001-022059- New Castle- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ002-022059- Kent- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for Kent County in Delaware. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ003-022059- Inland Sussex- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for inland portions of Sussex County in Delaware. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ004-022059- Delaware Beaches- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for the Atlantic coastal portions of Sussex County in Delaware. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. There is a moderate risk of rip currents on Thursday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ054-022059- Carbon- 0459 PM EDT Wed Sep 01 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. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ055-022059- Monroe- 0459 PM EDT Wed Sep 01 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. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ060-022059- Berks- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ061-022059- Lehigh- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ062-022059- Northampton- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ070-022059- Delaware- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ071-022059- Philadelphia- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ101-022059- Western Chester- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ102-022059- Eastern Chester- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ103-022059- Western Montgomery- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ104-022059- Eastern Montgomery- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ105-022059- Upper Bucks- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ106-022059- Lower Bucks- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ001-022059- Sussex- 0459 PM EDT Wed Sep 01 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. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ007-022059- Warren- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ008-022059- Morris- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ009-022059- Hunterdon- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ010-022059- Somerset- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ012-022059- Middlesex- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ013-022059- Western Monmouth- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ014-022059- Eastern Monmouth- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Rip Current Risk Statement. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Rip Current Risk Statement. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ015-022059- Mercer- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ016-022059- Salem- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ017-022059- Gloucester- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ018-022059- Camden- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ019-022059- Northwestern Burlington- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ020-022059- Ocean- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ021-022059- Cumberland- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for Cumberland County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ022-022059- Atlantic- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for inland portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ023-022059- Cape May- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for Cape May County excluding the Atlantic coast in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ024-022059- Atlantic Coastal Cape May- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for the Atlantic coastal portions of Cape May County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Rip Current Risk Statement. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Rip Current Risk Statement. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ025-022059- Coastal Atlantic- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for coastal portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Rip Current Risk Statement. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Rip Current Risk Statement. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ026-022059- Coastal Ocean- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Rip Current Risk Statement. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Rip Current Risk Statement. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ027-022059- Southeastern Burlington- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MDZ012-022059- Kent MD- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MDZ015-022059- Queen Annes- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MDZ019-022059- Talbot- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MDZ020-022059- Caroline- 0459 PM EDT Wed Sep 01 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. Flash Flood Watch. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ430-022059- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- 0459 PM EDT Wed Sep 01 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. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ431-022059- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for lower Delaware Bay. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ450-022059- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- 0459 PM EDT Wed Sep 01 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. Gale Warning. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ451-022059- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- 0459 PM EDT Wed Sep 01 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. Gale Warning. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ452-022059- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Atlantic County out 20 nm. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ453-022059- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Cape May County out 20 nm. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ454-022059- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- 0459 PM EDT Wed Sep 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. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ455-022059- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 0459 PM EDT Wed Sep 01 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Sussex County out 20 nm. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. Tornado Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures.
In the hours before
Local storm report, Sep 1, 5:17 PM EDT, 57 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
517 PM EDT WED SEP 1 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0900 AM HAIL BEACHWOOD 39.92N 74.21W
09/01/2021 E0.50 INCH OCEAN NJ TRAINED SPOTTER
0914 AM MARINE TSTM WIND 2 SSW SEASIDE PARK 39.91N 74.09W
09/01/2021 M42 MPH ANZ451 NJ MESONET
SOUTH SEASIDE PARK MARINA VIA WEATHERFLOW.
1245 PM FLASH FLOOD 1 NNE REEDERS 41.03N 75.33W
09/01/2021 MONROE PA DEPT OF HIGHWAYS
FLOODING REPORTED ON WARNER ROAD.
0320 PM TSTM WND DMG 2 N ROYAL OAK 38.75N 76.18W
09/01/2021 TALBOT MD DEPT OF HIGHWAYS
DOWNED TREES OR WIRES CAUSED A PORTION OF
MD-329 TO BE CLOSED NORTH OF STATION RD.
TIME ESTIMATED FROM RADAR.
0320 PM FLASH FLOOD 1 SSW TEMPLE 40.40N 75.92W
09/01/2021 BERKS PA PUBLIC
MULTIPLE REPORTS FROM MPING: OF STREET/ROAD
FLOODING ACROSS CENTRAL BERKS COUNTY.
0330 PM FLASH FLOOD 1 W EAST CALN TWP 40.02N 75.69W
09/01/2021 CHESTER PA DEPT OF HIGHWAYS
FLOODING ON US 30 WESTBOUND BETWEEN US 30
BUSINESS AND NORWOOD ROAD.
0350 PM FLASH FLOOD 2 ESE HONEY BROOK TWP 40.08N 75.86W
09/01/2021 CHESTER PA DEPT OF HIGHWAYS
FLOODING ON US-322 NEAR ROCKVILLE.
0400 PM FLASH FLOOD 1 N MALVERN 40.06N 75.51W
09/01/2021 CHESTER PA FIRE DEPT/RESCUE
FLASH FLOODING WITH THE ROAD NEAR IMPASSABLE
NEAR THE INTERSECTION OF CHURCH RD AND W
SWEDESFORD RD.
0400 PM FLASH FLOOD POTTSTOWN 40.25N 75.65W
09/01/2021 MONTGOMERY PA TRAINED SPOTTER
MULTIPLE WATER RESCUES IN PROGRESS IN
POTTSTOWN.
0417 PM TSTM WND DMG 1 SE OXFORD 39.78N 75.96W
09/01/2021 CHESTER PA EMERGENCY MNGR
TREES AND POWER POLES SNAPPED AND ROOF
DAMAGE ALONG SLATE HILL DRIVE IN EAST
NOTTINGHAM TOWNSHIP. PROBABLE TORNADO. TIME
ESTIMATED FROM RADAR.
0420 PM FLASH FLOOD 1 ESE SOUTH POTTSTOWN 40.23N 75.64W
09/01/2021 CHESTER PA 911 CALL CENTER
FLOODED ROADWAY AT KEIM STREET.
0421 PM TSTM WND DMG 2 S UPPER OXFORD TWP 39.81N 75.95W
09/01/2021 CHESTER PA PUBLIC
MULTIPLE TREES DOWN ALONG US 1 SOUTH NEAR
NEW LONDON. POSSIBLE TORNADO. TIME ESTIMATED
FROM RADAR.
0430 PM FLASH FLOOD GRATERFORD 40.23N 75.45W
09/01/2021 MONTGOMERY PA TRAINED SPOTTER
SMALL CREEK IN THE VICINITY OF PERKIOMEN
CREEK NEAR GRATERFORD IS OUT OF ITS BANKS.
0441 PM NON-TSTM WND GST NEW CASTLE COUNTY AIRPO 39.68N 75.61W
09/01/2021 M52 MPH NEW CASTLE DE ASOS
0454 PM FLASH FLOOD 2 NE WEST MARLBOROUGH T 39.93N 75.79W
09/01/2021 CHESTER PA PUBLIC
WATER ENTERING A GARAGE OF A RESIDENCE 4
MILES SSE OF COATESVILLE.
0500 PM FLASH FLOOD 1 NE CLAYMONT 39.81N 75.45W
09/01/2021 NEW CASTLE DE DEPT OF HIGHWAYS
PHILADELPHIA PIKE CLOSED DUE TO FLOODING.
&&Local storm report, Sep 1, 5:32 PM EDT, 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
532 PM EDT WED SEP 1 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0516 PM FLASH FLOOD VALLEY FORGE 40.10N 75.46W
09/01/2021 MONTGOMERY PA OTHER FEDERAL
VALLEY FORGE GAUGE AT VALLEY CREEK EXCEEDED
FLOOD STAGE.
&&
SFJLocal storm report, Sep 1, 5:46 PM EDT, 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
546 PM EDT WED SEP 1 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0530 PM FLASH FLOOD 1 S DEVAULT 40.06N 75.54W
09/01/2021 CHESTER PA PUBLIC
MULTIPLE CARS STUCK IN OVER ONE FOOT OF
WATER AT THE INTERSECTION OF PA 29 AND GREAT
VALLEY PARKWAY. TIME ESTIMATED.
&&
SFJLocal storm report, Sep 1, 5:55 PM EDT, 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
555 PM EDT WED SEP 1 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0545 PM FLASH FLOOD LOWER PROVIDENCE TOWNSH 40.18N 75.38W
09/01/2021 MONTGOMERY PA TRAINED SPOTTER
MANY WATER RESCUES ONGOING AROUND MONTGOMERY
COUNTY.
&&
SFJLocal storm report, Sep 1, 6:07 PM EDT, 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
607 PM EDT WED SEP 1 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0544 PM TSTM WND DMG 1 SE LOWER GWYNEDD TWP 40.18N 75.21W
09/01/2021 MONTGOMERY PA PUBLIC
TREE AND POWER LINE DAMAGE AROUND MAPLE
GLEN. POSSIBLE TORNADO. TIME ESTIMATED FROM
RADAR.
&&
SFJLocal storm report, Sep 1, 6:13 PM EDT, 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
613 PM EDT WED SEP 1 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0546 PM TSTM WND DMG 2 WNW HORSHAM 40.19N 75.16W
09/01/2021 MONTGOMERY PA 911 CALL CENTER
MULTIPLE BUILDINGS HAD THEIR ROOFS BLOWN OFF
ALONG NORRISTOWN ROAD. NORRISTOWN ROAD IS
COMPLETELY BLOCKED WITH DEBRIS. POSSIBLE
TORNADO. TIME ESTIMATED FROM RADAR.
&&
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 3:23 AM EDT | Gale Warning | PHI | 32 hr | |
| Sep 1, 3:23 AM EDT | Small Craft Advisory | PHI | 41 hr | |
| Sep 1, 4:34 AM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 39 hr |
| Sep 1, 7:58 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 47 min |
| Sep 1, 8:39 AM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 39 min |
| Sep 1, 9:11 AM EDT | Special Marine Warning | PHI | 64 min | |
| Sep 1, 11:24 AM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 3 hr |
| Sep 1, 4:04 PM EDT | Areal Flood Warning | PHI | Warren | 24 hr |
| Sep 1, 4:12 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 7 hr |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Morris, Somerset | 6 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 8 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 6 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Passaic | 21 days |
| Sep 1, 4:33 PM EDT | River Flood Warning | PHI | Morris, Passaic | 46 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Hunterdon, Somerset | 36 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Somerset | 22 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 42 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 48 hr |
| Sep 1, 4:41 PM EDT | River Flood Warning | PHI | Somerset | 61 hr |
| Sep 1, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer | 47 min |
| Sep 1, 5:26 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 9 hr |
| Sep 1, 5:33 PM EDT | Special Marine Warning | PHI | 27 min | |
| Sep 1, 5:34 PM EDT | Tornado Warning | PHI | Mercer | 26 min |
| Sep 1, 5:35 PM EDT | Tornado Warning | PHI | Cumberland, Salem | 25 min |
| Sep 1, 5:42 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Morris, Somerset, Warren | 10 hr |
| Sep 1, 5:57 PM EDT | Tornado Warning | PHI | Gloucester, Salem | 33 min |
| Sep 1, 5:57 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer, Somerset | 33 min |
| Sep 1, 6:05 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 10 hr |
| Sep 1, 6:08 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 6 hr |
| Sep 1, 6:20 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer, Somerset | 40 min |
| Sep 1, 6:22 PM EDT | Tornado Warning | PHI | Burlington, Camden, Gloucester | 23 min |
| Sep 1, 6:42 PM EDT | Tornado Warning | PHI | Burlington, Camden | 33 min |
| Sep 1, 6:59 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset | 61 min |
| Sep 1, 7:04 PM EDT | Tornado Warning | PHI | Burlington, Mercer | 26 min |
| Sep 1, 7:22 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer | 11 min |
| Sep 1, 7:28 PM EDT | Tornado Warning | PHI | Mercer, Middlesex, Morris, Somerset | 47 min |
| Sep 1, 7:31 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Somerset | 4 hr |
| Sep 1, 7:44 PM EDT | Special Marine Warning | PHI | 61 min | |
| Sep 1, 6:19 AM EDT | Areal Flood Advisory | PHI | Chester, Delaware | 116 min |
| Sep 1, 6:49 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Philadelphia | 86 min |
| Sep 1, 12:07 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 4 hr |
| Sep 1, 1:29 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 6 hr |
| Sep 1, 2:53 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Delaware, Montgomery | 9 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Montgomery | 36 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Chester, Montgomery, Philadelphia | 43 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Montgomery, Philadelphia | 41 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Philadelphia | 39 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Berks | 24 hr |
| Sep 1, 4:02 PM EDT | River Flood Warning | PHI | Monroe | 24 hr |
| Sep 1, 4:10 PM EDT | River Flood Warning | PHI | Monroe | 19 hr |
| Sep 1, 4:12 PM EDT | River Flood Warning | PHI | Lehigh, Northampton | 25 hr |
| Sep 1, 4:12 PM EDT | River Flood Warning | PHI | Lehigh, Northampton | 24 hr |
| Sep 1, 4:12 PM EDT | River Flood Warning | PHI | Carbon | 15 hr |
| Sep 1, 4:13 PM EDT | Tornado Warning | PHI | Chester | 32 min |
| Sep 1, 4:20 PM EDT | River Flood Warning | PHI | Montgomery | 22 hr |
| Sep 1, 4:21 PM EDT | River Flood Warning | PHI | Bucks | 29 hr |
| Sep 1, 4:42 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 6 hr |
| Sep 1, 5:07 PM EDT | River Flood Warning | PHI | Chester | 17 hr |
| Sep 1, 5:15 PM EDT | Tornado Warning | PHI | Delaware, Montgomery, Philadelphia | 30 min |
| Sep 1, 6:38 PM EDT | River Flood Warning | PHI | Chester, Delaware | 26 hr |
| Sep 1, 7:05 PM EDT | Flash Flood Warning | PHI | Bucks | 8 hr |
| Sep 1, 7:23 PM EDT | Areal Flood Warning | PHI | Berks, Lehigh | 14 hr |
| Sep 1, 7:53 PM EDT | River Flood Warning | PHI | Delaware | 13 hr |
| Sep 1, 8:03 AM EDT | River Flood Warning | PHI | New Castle | 4 hr |
| Sep 1, 4:59 PM EDT | Tornado Warning | PHI | Kent, Sussex | 46 min |
| Sep 1, 5:01 PM EDT | Tornado Warning | PHI | Kent, New Castle | 44 min |
| Sep 1, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 44 min |
| Sep 1, 6:03 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 42 min |
| Sep 1, 6:08 PM EDT | River Flood Warning | PHI | New Castle | 18 hr |
| Sep 1, 6:15 PM EDT | River Flood Warning | PHI | New Castle | 9 hr |
| Sep 1, 6:24 PM EDT | Tornado Warning | PHI | New Castle | 16 min |
| Sep 1, 6:38 PM EDT | River Flood Warning | PHI | New Castle | 28 hr |
| Sep 1, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 63 min |
| Sep 1, 7:44 PM EDT | River Flood Warning | PHI | New Castle | 11 hr |
Nearby
Special Marine Warnings in New Jersey, 2021Every special marine warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.