Heavy rain associated with Post-Tropical Cyclone Fred caused flash flooding in eastern Pennsylvania on the night of August 18-19, 2021. There were rainfall totals as high as 3 to 5 inches.
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.
Heavy rain associated with Post-Tropical Cyclone Fred caused flash flooding in eastern Pennsylvania on the night of August 18-19, 2021. There were rainfall totals as high as 3 to 5 inches.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before the first event at Aug 18, 8:59 PM EST, 1 hour 6 minutes earlier.
Area Forecast Discussion
National Weather Service Mount Holly NJ
959 PM EDT Wed Aug 18 2021
.SYNOPSIS...
The remnants of Tropical Storm Fred will pass northwest of the
region through tonight then move into southern New England by
Thursday. A broad and slow moving upper trough will remain in place
across the region through the weekend. Meanwhile, tropical cyclone
Henri is expected to pass just offshore of the Mid-Atlantic region
and potential impact southern New England Sunday into Monday. A cold
front may approach the region next week.
&&
.NEAR TERM /THROUGH THURSDAY/...
As of 950 PM, the Tornado Watch continues for portions of
eastern PA until 11 PM. We opted not to expand it farther east
at this time.
Main convective band moving across parts of eastern PA with the
potential for locally strong to damaging wind gusts. Some broad
and transient rotation has been occurring with some of the
embedded cells, therefore a brief tornado cannot be ruled out.
This line is associated with the main vorticity maximum with the
remnants of Fred. There is also an increased low-level jet
associated with it, with an enhanced area of SRH also along and
ahead of this line. Storms are moving along, however given the
very high precipitable water values (2.0-2.3 inches) they will
produce robust hourly rainfall rates. The Flash Flood Watch
remains unchanged, however the threat may be somewhat more
localized.
Otherwise, Fred's remnants tracks east-northeastward along the
Pennsylvania-New York border later tonight, then quickly exits
to the north and east. Numerous showers with embedded
thunderstorms mainly near and north/west of I-95 will shift
northeastward through the overnight and end by daybreak. Areas
of low clouds will be in place into Thursday morning, then
breaks of sunshine increase. A few additional showers or
thunderstorms may develop mainly Thursday afternoon.
High temperatures Thursday look to be in the mid 80s across
Pennsylvania and northwestern New Jersey and closer to 90 across the
urban corridor and points south and east. It will remain rather
humid as well.
&&
.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY/...
Broad upper troughing will remain in place through Saturday in the
wake of Fred's remnants. Without a notable frontal boundary pushing
through in Fred's wake, the warm and humid airmass will remain in
place across the region. As such, diurnal convection chances will
remain both Friday and especially Saturday as enhanced low-level
moisture begins streaming in from the southeast. Have kept mention
of likely PoPs for Saturday across much of the interior areas where
upslope flow is more likely to aid in convective initiation. Surface
convergence could also be realized and maximized near the coast as
well. With lack of any substantial mid-level flow, the severe threat
with any thunderstorms should remain limited Friday and Saturday.
However, PWat values will remain high (on the order of 1.7"-2.0")
each day, thus any widespread or persistent convection could yield a
localized flash flooding threat, especially Saturday.
By late Saturday, tropical cyclone Henri (forecast to be a Category
1 strength Hurricane by NHC) will be making an approach to the
southern New England coast. Details on this system can by found in
the Long Term portion of this discussion.
Expect high temperatures during this period around normal in the mid
80s with lows slightly above normal in the upper 60s to around 70
degrees. Skies will remain mostly cloudy through the period. Light
westerly winds Friday will become southeasterly around 5-10 mph.
&&
.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
The broad and weak upper troughing will persist through the weekend
as mid-level ridging builds across Quebec Saturday into Sunday. At
the surface, high pressure will be in place across the Canadian
Maritimes, Bermuda, and the central CONUS. This pattern (especially
Quebec ridging/Canadian Maritimes high pressure) will put the breaks
on any notable northward motion of tropical cyclone Henri is making
across the western Atlantic late Saturday into Sunday and send it in
a slow westerly drift toward the center of the upper troughing/weak
closed low centered across the upper Mid-Atlantic interior.
Therefore, I suspect we'll see a westerly trend in the forecast
track of Henri for this period potentially bringing it precariously
close to the southern New England or Long Island coasts Sunday
and/or Monday. In any case, Henri does appear to stay away from our
immediate coasts, however its proximity to our forecast area will
play a key role in how much precipitation/convection we get Sunday
and Monday. Have maintained chance to low-end likely PoPs for the
Sunday and Monday periods. Expect near to slightly above normal
temperatures with a north or westerly wind around 5-10 mph, stronger
near the coasts.
Predictability becomes quite low Tuesday and Wednesday. A weak front
may approach from the north as high pressure builds across the Great
Lakes. Have maintained a blend of guidance for this period including
slightly above normal temperatures and slight chance PoPs.
&&
.AVIATION /02Z THURSDAY THROUGH MONDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.
Tonight...VFR ceilings lower to MVFR, with areas of IFR
occurring overnight. Showers and a few thunderstorms will be
most widespread west and north of PHL, with RDG and ABE having
the lowest restrictions associated with them. Some showers,
perhaps a thunderstorm, will impact the ILG to PHL/PNE areas
this evening and overnight, with less confidence farther to the
south and east. Southeast winds diminishing to 10 knots or less
and shifting to the southwest. Low confidence regarding the
timing details.
Thursday...MVFR/IFR ceilings early improve to VFR. A shower or
thunderstorm cannot be ruled out with brief MVFR conditions
possible. Southwest winds of 5-10 knots, becoming west or west
northwest 10-15 knots. Moderate confidence.
Outlook...
Thursday night through Friday...Restrictions probable in the
overnight period in low stratus and/or fog. Gradually becoming VFR
during the daytime with scattered showers and thunderstorms
possible. Winds west to northwesterly 5 kts or less. Low confidence
on timing and spacial distribution of overnight restrictions and
showers and thunderstorms.
Saturday through Monday...Prevailing VFR, but scattered showers and
thunderstorms are forecast, especially during the daytime hours.
Winds southeasterly around 5 kts Saturday. Winds will become north
to northwesterly around 5-10 kts Sunday and Monday. Some patchy fog
is possible during the overnight periods. Moderate confidence
overall.
&&
.MARINE...
Generally sub-advisory conditions are expected today with south-
southeasterly winds from 15 to 20 knots with a few gusts reaching
close to 25 knots. Coverage of this doesn't look widespread enough
to warrant an SCA at this time. Winds turn more southwesterly
overnight. Seas from 2 to 4 feet.
Thursday...Sub-advisory winds expected tomorrow from 15 to 20 knots
out of the southwest. Seas from 2 to 3 feet.
Outlook...
Friday...Sub-advisory conditions expected. Winds becoming southerly
around 5-10 kts. Seas 2-4 feet. Afternoon and evening showers and
thunderstorms possible.
Saturday...Advisory conditions likely developing during this period
with seas rising near or over 5 feet Saturday or Saturday night.
Southeasterly winds 5-10 kts. Showers and thunderstorms probable.
Sunday through Monday...Tropical cyclone Henri will be making an
approach to the offshore waters during this period. Advisory
conditions likely, especially due to seas in the 5-10 foot range
possible. Northerly winds 10-20 kts with stronger gusts possible.
Showers and thunderstorms probable.
Rip Currents...
Long period southeasterly swells associated with distant Tropical
Cyclone Henri are forecast to build through the weekend,
significantly elevating the rip current risk through at least Monday.
For Thursday, we are expecting a MODERATE risk for the development
of dangerous rip currents for the New Jersey beaches and a LOW risk
for the Delaware beaches.
For Friday, there is a HIGH risk for the development of dangerous
rip currents for the Cape May County and Atlantic County beaches,
where confidence is currently the greatest, although this may need
to be expanded to other areas in a later update. A MODERATE risk
is currently forecast elsewhere.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flash Flood Watch until 8 AM EDT Thursday for PAZ054-055-
060>062.
NJ...None.
DE...None.
MD...None.
MARINE...None.
&&
Synopsis...Staarmann
Near Term...Davis/Gorse
Short Term...Staarmann
Long Term...Staarmann
Aviation...Gorse/Staarmann
Marine...Davis/Gorse/StaarmannHazardous Weather Outlook National Weather Service Mount Holly NJ 1101 PM EDT Wed Aug 18 2021 DEZ001-200301- New Castle- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for New Castle County in Delaware. .DAY ONE...Through tonight. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ002-200301- Kent- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Kent County in Delaware. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ003-200301- Inland Sussex- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for inland portions of Sussex County in Delaware. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ004-200301- Delaware Beaches- 1101 PM EDT Wed Aug 18 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...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. 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. PAZ054-200301- Carbon- 1101 PM EDT Wed Aug 18 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. PAZ055-200301- Monroe- 1101 PM EDT Wed Aug 18 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. PAZ060-200301- Berks- 1101 PM EDT Wed Aug 18 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. .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. PAZ061-200301- Lehigh- 1101 PM EDT Wed Aug 18 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. .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. PAZ062-200301- Northampton- 1101 PM EDT Wed Aug 18 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. .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. PAZ070-200301- Delaware- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Delaware County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ071-200301- Philadelphia- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Philadelphia County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. PAZ101-200301- Western Chester- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for western Chester County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. PAZ102-200301- Eastern Chester- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for eastern Chester County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. PAZ103-200301- Western Montgomery- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for western Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. PAZ104-200301- Eastern Montgomery- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for eastern Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. PAZ105-200301- Upper Bucks- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for upper Bucks County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. PAZ106-200301- Lower Bucks- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for lower Bucks County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ001-200301- Sussex- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Sussex County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. NJZ007-200301- Warren- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Warren County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. NJZ008-200301- Morris- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Morris County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. NJZ009-200301- Hunterdon- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Hunterdon County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. NJZ010-200301- Somerset- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Somerset County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. NJZ012-200301- Middlesex- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Middlesex County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. 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. NJZ013-200301- Western Monmouth- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for western Monmouth County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ014-200301- Eastern Monmouth- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for eastern Monmouth County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. 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. NJZ015-200301- Mercer- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Mercer County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. NJZ016-200301- Salem- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Salem County in New Jersey. .DAY ONE...Through tonight. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ017-200301- Gloucester- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Gloucester County in New Jersey. .DAY ONE...Through tonight. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ018-200301- Camden- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Camden County in New Jersey. .DAY ONE...Through tonight. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ019-200301- Northwestern Burlington- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for northwestern Burlington County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ020-200301- Ocean- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for inland portions of Ocean County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. 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. NJZ021-200301- Cumberland- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Cumberland County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ022-200301- Atlantic- 1101 PM EDT Wed Aug 18 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...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. NJZ023-200301- Cape May- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Cape May County excluding the Atlantic coast in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ024-200301- Atlantic Coastal Cape May- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for the Atlantic coastal portions of Cape May County in New Jersey. .DAY ONE...Through tonight. There is a moderate risk of rip currents. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. 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. NJZ025-200301- Coastal Atlantic- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for coastal portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. There is a moderate risk of rip currents. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...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. NJZ026-200301- Coastal Ocean- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for coastal portions of Ocean County in New Jersey. .DAY ONE...Through tonight. There is a moderate risk of rip currents. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Minor coastal flooding is possible on Saturday. 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. NJZ027-200301- Southeastern Burlington- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for southeastern Burlington County in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MDZ012-200301- Kent MD- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Kent County in Maryland. .DAY ONE...Through tonight. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .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. MDZ015-200301- Queen Annes- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Queen Annes County in Maryland. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MDZ019-200301- Talbot- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Talbot County in Maryland. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MDZ020-200301- Caroline- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for Caroline County in Maryland. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ430-200301- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for upper Delaware Bay. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...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. ANZ431-200301- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- 1101 PM EDT Wed Aug 18 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...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. ANZ450-200301- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Monmouth County out 20 nm. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Gale-force winds and very rough seas are forecast on Saturday. Gale-force winds and very rough seas are forecast on Sunday. 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. ANZ451-200301- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Ocean County out 20 nm. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Gale-force winds and very rough seas are forecast on Saturday. Gale-force winds and very rough seas are forecast on Sunday. 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. ANZ452-200301- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Atlantic County out 20 nm. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Gale-force winds and very rough seas are forecast on Saturday. Gale-force winds and very rough seas are forecast on Sunday. 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. ANZ453-200301- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- 1101 PM EDT Wed Aug 18 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Cape May County out 20 nm. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Gale-force winds and very rough seas are forecast on Saturday. 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. ANZ454-200301- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- 1101 PM EDT Wed Aug 18 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. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Gale-force winds and very rough seas are forecast on Saturday. 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. ANZ455-200301- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 1101 PM EDT Wed Aug 18 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...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.
Special Weather Statement
National Weather Service Mount Holly NJ
947 PM EDT Wed Aug 18 2021
PAZ060-190245-
Berks PA-
947 PM EDT Wed Aug 18 2021
...A strong thunderstorm will impact portions of eastern Berks County
through 1045 PM EDT...
At 946 PM EDT, Doppler radar was tracking a strong thunderstorm over
Terre Hill, or near New Holland, moving northeast at 30 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Reading, Wyomissing, Birdsboro, Kutztown, Fleetwood, Sinking Spring,
Laureldale, Wernersville, Topton, Bally, Bechtelsville, Lyons, New
Morgan, Spring Ridge, Gilbertsville, Shillington, West Reading,
Boyertown, Mount Penn and Mohnton.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 299.
Interstate 78 in Pennsylvania between mile markers 42 and 44.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
A Tornado Watch remains in effect until 1100 PM EDT for eastern and
southeastern Pennsylvania.
&&
LAT...LON 4060 7577 4045 7553 4043 7554 4025 7569
4014 7587 4029 7611
TIME...MOT...LOC 0146Z 225DEG 28KT 4017 7609
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
MeolaPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1016 PM EDT WED AUG 18 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0632 PM TSTM WND DMG 1 ESE HOMEVILLE 39.85N 75.96W
08/18/2021 CHESTER PA PUBLIC
TWO POLES SNAPPED ALONG ROUTE 896. TIME
ESTIMATED FROM RADAR.
&&
SFJPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1034 PM EDT WED AUG 18 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1033 PM HEAVY RAIN NEFFS 40.70N 75.61W
08/18/2021 M2.40 INCH LEHIGH PA TRAINED SPOTTER
WITHIN THE LAST 30 MIN.
&&
SFJThe Philadelphia radar (KDIX), 125 km away, was scanning. The volume nearest the first event began at 03:06 UTC.
33 flash flood. Local standard time, as filed.
Coffeetown Road was closed at Orefield Road in South Whitehall Township due to flooding.
A section of PA Route 145 in North Whitehall Township was closed due to flooding.
Weaversville Road in Hanover Township was closed due to flooding.
Pinehurst Road in Bethlehem was closed due to flooding.
Minesite Road in Wescosville was closed due to flooding.
Two vehicles were stranded in flood waters at the intersection of Madison Avenue and Tyler Avenue in Phoenixville.
Flood waters reached some homes in Bangor.
A water rescue took place on the Pennsylvania Turnpike near Little Conestoga Road in Upper Uwchlan Township.
A water rescue took place on First Avenue in Royersford.
A water rescue took place on US Route 202 near the US Route 30 Bypass in West Whiteland Township. Valley Road was under water at Valley Creek. Several vehicles were trapped in flood waters on the Lincoln Highway near the Pottstown Pike in West Whiteland Township. Rocks and debris were washed onto Cockerham Lane by flood waters.
Widespread roadway flooding occurred in East Whiteland Township, including Conestoga Road, North Bacton Hill Road and Planebrook Road.
PA Route 447 was closed near PA Route 191 to the north of Analomink due to flooding.
Three water rescues took place in West Chester. One was at the intersection of East Gay Street and Montgomery Avenue, another was at the intersection of South Bolmar Street and Union Street, and a final one was at the intersection of Union Street and South Franklin Street.
Minor flooding occurred along the East Branch of the Brandywine Creek between West Bradford Township and East Bradford Township.
A water rescue took place at the intersection of US Route 202 and North Valley Road in Tredyffrin Township. Another water rescue took place at the intersection of Old Eagle School Road and Wallace Drive. A third water rescue took place at the intersection of Duportail Road and Mill Road in Tredyffrin Township.
Three water rescues took place in Paoli, one at the intersection of East Lancaster Avenue and Leopard Road, another at the intersection of Maple Avenue and Agnew Lane, and a final one at the intersection of Paoli Pike and Rustic Lane.
A water rescue took place at the intersection of Grubb Road and Davis Road in Willistown Township.
A water rescue took place on River Road in Valley Forge.
A water rescue took place on North Gulph Road in King of Prussia.
A water rescue took place at the intersection of Sugartown Road and Morris Road in Radnor Township. Also, there was widespread roadway flooding in Radnor Township with multiple vehicles trapped in the flood waters. There was a rockslide on Strafford Avenue near Lancaster Avenue.
A water rescue took place on DeKalb Street in Bridgeport. US Route 202 was closed in Bridgeport due to flooding.
Moderate flooding occurred along Valley Creek near Valley Forge.
A water rescue took place at the intersection of West Elm Street and Maple Street in Conshohocken.
A water rescue took place at the intersection of Paper Mill Road and Harston Lane in Flourtown.
Keith Valley Road in Horsham Township was closed due to flooding.
Moderate flooding occurred along Cobbs Creek in Philadelphia.
Two water rescues took place in Abington, one on Highland Avenue and the other on Brook Road. A third water rescue occurred at the intersection of Easton Road and Woodland Road in Abington.
Moderate flooding occurred along the Frankford Creek in Philadelphia.
A water rescue took place on the Hollow Road ramp to the Schuylkill Expressway in Lower Merion Township.
Minor flooding occurred along the Wissahickon Creek in Philadelphia.
Philmont Avenue was closed near Pine Road in Lower Moreland Township due to flooding.
A water rescue took place on Ashmead Road in Cheltenham.
Minor flooding occurred along the Pennypack Creek in Northeast Philadelphia.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2021Every state in 2021This day in weather historyWarnings in Pennsylvania, August 2021
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 968279, 968280, 968277, 968284, 968285, 968288, 968281, 968322, 968286, 968289, 968291, 968330, 968290, 968292, 968294, 968301, 968327, 968326, 968297, 968299, 968307, 968308, 968324, 968309, 968325, 968313, 968310, 968321, 968329, 968312, 968328, 968311, 968320.