Alert archive / Maryland / Areal Flood Advisories in 2021
Areal Flood Advisory 131, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Aug 20, 2021, 11:07 AM EDT for Caroline County, Talbot County, Maryland. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 20, 2021, 11:07 AM EDT (15:07 UTC)
- Expired
- Aug 20, 2021, 2:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Caroline County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 60 km from the middle of the area, began a volume at 15:08 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, 3.1 hours before the alert went out and 107 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
- 166 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 987 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -53 m²/s²
- 0-3 km storm-relative helicity
- -29 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.2
The text
As transmitted.
684
WGUS81 KPHI 201507
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
1107 AM EDT Fri Aug 20 2021
MDC011-041-201700-
/O.NEW.KPHI.FA.Y.0131.210820T1507Z-210820T1700Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Caroline MD-Talbot MD-
1107 AM EDT Fri Aug 20 2021
The National Weather Service in Mount Holly has issued a
* Flood Advisory for...
Southern Caroline County in eastern Maryland...
Central Talbot County in eastern Maryland...
* Until 100 PM EDT.
* At 1107 AM EDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 1.5 inches of rain
have fallen near and west of the Easton area.
* Some locations that will experience flooding include...
Easton, Denton, Federalsburg, Trappe, Preston, Oxford, Tanyard,
Windyhill, Choptank, Matthews, Harmony, and Hambleton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3875 7624 3871 7627 3876 7632 3867 7634
3874 7633 3875 7637 3889 7573 3864 7571
3869 7576 3870 7590 3857 7603 3868 7617
3868 7620 3867 7620
$$
CMS2 follow-up statements
425
WGUS81 KPHI 201647
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
1247 PM EDT Fri Aug 20 2021
MDC011-041-201800-
/O.EXT.KPHI.FA.Y.0131.000000T0000Z-210820T1800Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Caroline MD-Talbot MD-
1247 PM EDT Fri Aug 20 2021
The National Weather Service in Mount Holly has extended the
* Flood Advisory for...
Southern Caroline County in eastern Maryland...
Central Talbot County in eastern Maryland...
* Until 200 PM EDT.
* At 1247 PM EDT, Doppler radar indicated moderate rain continuing
in the advisory area but will diminish during the next hour. Minor
flooding will likely continue for the next hour. Between 0.5 and
1.5 inches of rain have fallen.
* Some locations that will experience flooding include...
Easton, Denton, Federalsburg, Trappe, Preston, Oxford, Tanyard,
Windyhill, Choptank, Matthews, Harmony, and Hambleton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3875 7624 3871 7627 3876 7632 3867 7634
3874 7633 3875 7637 3889 7573 3864 7571
3869 7576 3870 7590 3857 7603 3868 7617
3868 7620 3867 7620
$$
CMS831
WGUS81 KPHI 201751
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
151 PM EDT Fri Aug 20 2021
MDC011-041-201801-
/O.EXP.KPHI.FA.Y.0131.000000T0000Z-210820T1800Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Caroline MD-Talbot MD-
151 PM EDT Fri Aug 20 2021
...FLOOD ADVISORY WILL EXPIRE AT 2 PM EDT THIS AFTERNOON FOR
SOUTHERN CAROLINE AND CENTRAL TALBOT COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3875 7624 3871 7627 3876 7632 3867 7634
3874 7633 3875 7637 3889 7573 3864 7571
3869 7576 3870 7590 3857 7603 3868 7617
3868 7620 3867 7620
$$
CMSWhat forecasters said that day
The local office's own words before this areal flood advisory 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 areal flood advisory went out at Aug 20, 9:35 AM EDT, 1 hour 32 minutes earlier.
Area forecast discussion, Aug 20, 9:35 AM EDT, 1 hour 32 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
935 AM EDT Fri Aug 20 2021
.SYNOPSIS...
A broad mid and upper level trough will remain near our region
through the weekend. This weekend, Tropical Cyclone Henri is
expected to turn northward and then northeastward, but should stay
off our coast as it approaches the southern New England coast. A
cold front may approach our region Wednesday into Thursday.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
930 AM...Rain/showers continue to affect Delmarva into southern
NJ and SE PA at this time and a Flash Flood Watch remains in
effect for most of our Delmarva zones except New Castle County
DE. Parts of the eastern shore of MD around Talbot, Caroline,
Queen Anne's Counties have received 1-2+ inches of rain from
earlier showers and we are concerned this area could get hit
again later this morning by more heavy rain bands that are
currently affecting the western shore.
By mid afternoon, the initial rounds of showers and storms will
largely move offshore. With the trough to our west and the
development of some modest diurnal instability, an additional
pop-up shower or isolated thunderstorm will remain possible
through the later afternoon and evening. This activity will be
more limited in coverage, however, and much of the afternoon
will likely end up dry. There will remain a good deal of cloud
cover today, which will keep the instability in check. The
lingering clouds combined with the morning showers and storms
will also hold high temperatures below normal today, in the low
to mid 80s, but with continued high humidity.
Heading into the overnight, a spotty, weakly forced shower remains
possible through most of the night as we remain in a very humid air
mass. However, most indications are that shower coverage during the
overnight should be limited, and have covered it with slgt chc and
low end chc PoPs. With low dew point depressions and calm winds,
patchy fog development is also possible, though some lingering
higher level clouds may limit fog formation. It will be another mild
night, with lows in the upper 60s and low 70s.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY NIGHT/...
The main concern this weekend will be the potential for heavy rain.
Through the weekend, our region should be sandwiched between the mid
and upper level low just to our southwest, and the northward
progressing TC Henri to our east. Guidance is in relatively good
agreement that direct wind impacts with Henri will stay off our
coast. Henri's main precipitation shield should also stay off the
coast. However, depending on how Henri interacts with the broad
mid/upper level trough, a second area of precipitation will be
possible in between these two features especially Saturday into
Saturday night. If this were to happen, our region would be in a
prime location for this to occur.
Precipitable water values will remain well above normal, near or
above 2 inches on Saturday. It seems unlikely that there will be any
dry layers given southeasterly flow almost through the entirety of
the troposphere. Also, there should be a deep warm cloud layer (not
surprising given the time of year and tropical influence). Mean flow
is relatively slow (less than 20 kt), so storm motions could be
relatively slow. All of these factors increase the threat for heavy
rain. Additionally, antecedent conditions for much of our region
remain quite wet thanks to the remnants of TC Fred on Thursday.
All that to say that if this scenario were to develop, there is a
risk for heavy rain and flash flooding Saturday into Saturday
evening. However, there is a big if as to will this even develop as
this will be highly dependent on the ultimate track of Henri. For
now, have mentioned the potential of heavy rain in the forecast, but
will hold off on a flash flood watch until there is more confidence
if this will develop.
Additional rain is possible on Sunday, but by this point, our region
will not be in the prime location for synoptic scale lift as the mid
and upper level trough axis should be near our coast.
Despite likely persistent cloud cover, temperatures should be near
or even slightly above normal with highs mostly in the 80s, and
lows in the upper 60s to lower 70s.
&&
.LONG TERM /SUNDAY THROUGH THURSDAY/...
Another chance for showers and storms on Monday as the mid and upper
level trough starts to fill but remains near our region. By Tuesday
however, the mid and upper level pattern finally starts to
transition to a more zonal pattern. This should (finally) result in
a dry day on Tuesday. After that, attention turns to a weak cold
front approaching from the northwest. With the continued mostly
zonal flow pattern aloft, it is uncertain how far south this front
will progress. For now, have stayed close to the previous forecast
and a blend of guidance from Wednesday onward.
&&
.AVIATION /14Z FRIDAY THROUGH TUESDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.
Today... Near and north of PHL, mainly VFR. Showers and an
isolated tstm are possible through early afternoon, with just a
slight chance of an additional pop up shower or storm later this
afternoon. South of PHL, a better chance for MVFR or brief IFR
conditions with lower clouds and areas of heavier showers and
tstms, especially through early afternoon. Cannot rule out a
brief period or two of MVFR at PHL itself. All terminals should
turn VFR by mid to late afternoon. Winds today will probably be
best described as light and variable overall. But there should
be a general trend for light west or northwest flow to develop
at most of the terminals, with a light sea breeze bringing more
southerly flow to coastal areas by late afternoon and evening.
Moderate confidence.
Tonight... Initially, mainly VFR. The main concern overnight will be
the potential for fog or low stratus development. This could lead to
restrictions by the second half of the night, but it remains
uncertain how prevalent this will be. Winds light and variable or
calm. Moderate confidence.
Outlook...
Saturday and Sunday...There is a chance for MVFR or even IFR
conditions through this period as there will be multiple chances for
showers and thunderstorms with heavy rain through this period. There
is also a smaller chance for fog to develop on Sunday night. Winds
will be predominantly Northeasterly and easterly on Saturday at 5 to
15 kt, becoming northwesterly 5 to 15 kt on Sunday. Low confidence
especially on how widespread the showers and storms will be.
Monday...Predominantly VFR conditions, though there is another
chance for showers and thunderstorms, mostly Monday afternoon which
could result in temporary MVFR conditions. Westerly and
northwesterly winds around 5 kt. Moderate confidence.
Tuesday...VFR conditions expected. Light (less than 5kt)
northwesterly winds likely. Moderate confidence.
&&
.MARINE...
Through tonight... Sub-SCA conditions are expected. Winds mostly
westerly today then more southerly or southeasterly this evening and
tonight, but speeds of only 5 to 10 kt are expected and winds may be
light and variable at times. Seas 3 to 4 ft. A chance of showers and
tstms especially over the coastal waters of southern New Jersey,
Delaware, and Delaware Bay.
Outlook...
Saturday and Sunday...At least SCA conditions with rough seas of 6
to 8 ft are expected for much of this period. There is a small
chance for tropical storm force winds on the NJ Atlantic coastal
waters, but this will be highly dependent on the track of Henri and
at this point, it appears more likely that the tropical storm force
winds will stay east of our coastal waters.
Sunday night through Tuesday...Once seas subside below 5 ft either
Sunday night or Monday, winds and seas should stay below SCA
criteria.
Rip Currents...
Long period swells associated with Tropical Storm Henri will bring a
building threat for the development of dangerous rip currents to the
coasts of Delaware and New Jersey through the weekend.
The threat will begin to increase from south to north today. As a
result, we are forecasting a high risk for the development of
dangerous rip currents for the beaches of Sussex County in Delaware,
and Cape May County, Atlantic County, and Ocean County in New
Jersey. For coastal Monmouth County, the surf will be a little
lower, so the risk there has been maintained as moderate.
For the entirety of the weekend, a high risk for the development of
rip currents will exist for all of the local ocean-facing beaches.
Offshore tropical cyclones such as Henri are notorious for producing
some of the most dangerous rip currents our region faces. Swimming
is strongly discouraged this weekend due to the likely presence of
dangerous, life threatening rip currents.
Conditions should improve early in the new week as the storm weakens
and moves into the Gulf of Maine.
&&
.TIDES/COASTAL FLOODING...
The evening high tides associated with the full moon will be
particularly high on Friday, Saturday and Sunday. Meanwhile,
long period swells from Tropical Storm Henri will be reaching
our coast. As a result, there may be some minor tidal flooding
along the coasts of Delaware and New Jersey, along Delaware Bay
and on the tidal Delaware River over the weekend, mainly in the
evening and during the overnight hours.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...High Rip Current Risk until 8 PM EDT this evening for
NJZ024>026.
DE...Flash Flood Watch until 2 PM EDT this afternoon for DEZ002-003.
High Rip Current Risk until 8 PM EDT this evening for DEZ004.
MD...Flash Flood Watch until 2 PM EDT this afternoon for MDZ012-015-
019-020.
MARINE...None.
&&
Synopsis...Johnson
Near Term...Fitzsimmons/O'Brien
Short Term...Johnson
Long Term...Johnson
Aviation...Johnson/O'Brien
Marine...Iovino/Johnson/O'Brien
Tides/Coastal Flooding...WFO PHIHazardous weather outlook, Aug 20, 10:59 AM EDT, 8 minutes before
Hazardous Weather Outlook National Weather Service Mount Holly NJ 1059 AM EDT Fri Aug 20 2021 DEZ001-211459- New Castle- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for New Castle County in Delaware. .DAY ONE...Through tonight. Minor coastal flooding is possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. DEZ002-211459- Kent- 1059 AM EDT Fri Aug 20 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. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. DEZ003-211459- Inland Sussex- 1059 AM EDT Fri Aug 20 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. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. DEZ004-211459- Delaware Beaches- 1059 AM EDT Fri Aug 20 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. Rip Current Risk Statement. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible on Sunday. There is a moderate risk of rip currents 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. PAZ054-211459- Carbon- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Carbon County in Pennsylvania. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. PAZ055-211459- Monroe- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Monroe County in Pennsylvania. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. PAZ060-211459- Berks- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Berks County in Pennsylvania. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. PAZ061-211459- Lehigh- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Lehigh County in Pennsylvania. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. PAZ062-211459- Northampton- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Northampton County in Pennsylvania. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. PAZ070-211459- Delaware- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Delaware County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. PAZ071-211459- Philadelphia- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Philadelphia County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. PAZ101-211459- Western Chester- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for western Chester County in Pennsylvania. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. PAZ102-211459- Eastern Chester- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for eastern Chester County in Pennsylvania. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. PAZ103-211459- Western Montgomery- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for western Montgomery County in Pennsylvania. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. PAZ104-211459- Eastern Montgomery- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for eastern Montgomery County in Pennsylvania. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. PAZ105-211459- Upper Bucks- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for upper Bucks County in Pennsylvania. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. PAZ106-211459- Lower Bucks- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for lower Bucks County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. NJZ001-211459- Sussex- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Sussex County in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. NJZ007-211459- Warren- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Warren County in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. NJZ008-211459- Morris- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Morris County in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. NJZ009-211459- Hunterdon- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Hunterdon County in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. NJZ010-211459- Somerset- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Somerset County in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. NJZ012-211459- Middlesex- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Middlesex County in New Jersey. .DAY ONE...Through tonight. Minor coastal flooding is possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. NJZ013-211459- Western Monmouth- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for western Monmouth County in New Jersey. .DAY ONE...Through tonight. Minor coastal flooding is possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. NJZ014-211459- Eastern Monmouth- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for eastern Monmouth County in New Jersey. .DAY ONE...Through tonight. Minor coastal flooding is possible. 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...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible on Sunday. There is a moderate risk of rip currents 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. NJZ015-211459- Mercer- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Mercer County in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. NJZ016-211459- Salem- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Salem County in New Jersey. .DAY ONE...Through tonight. Minor coastal flooding is possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. NJZ017-211459- Gloucester- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Gloucester County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. NJZ018-211459- Camden- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Camden County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. NJZ019-211459- Northwestern Burlington- 1059 AM EDT Fri Aug 20 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...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. NJZ020-211459- Ocean- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for inland portions of Ocean County in New Jersey. .DAY ONE...Through tonight. Minor coastal flooding is possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. NJZ021-211459- Cumberland- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Cumberland County in New Jersey. .DAY ONE...Through tonight. Minor coastal flooding is possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. NJZ022-211459- Atlantic- 1059 AM EDT Fri Aug 20 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...Saturday through Thursday. 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. NJZ023-211459- Cape May- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for Cape May County excluding the Atlantic coast in New Jersey. .DAY ONE...Through tonight. Minor coastal flooding is possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible 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. NJZ024-211459- Atlantic Coastal Cape May- 1059 AM EDT Fri Aug 20 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. Rip Current Risk Statement. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible on Sunday. There is a moderate risk of rip currents 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. NJZ025-211459- Coastal Atlantic- 1059 AM EDT Fri Aug 20 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. Rip Current Risk Statement. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. There is a moderate risk of rip currents 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. NJZ026-211459- Coastal Ocean- 1059 AM EDT Fri Aug 20 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. Rip Current Risk Statement. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor coastal flooding is possible on Saturday. Minor coastal flooding is possible on Sunday. There is a moderate risk of rip currents 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. NJZ027-211459- Southeastern Burlington- 1059 AM EDT Fri Aug 20 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...Saturday through Thursday. 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. MDZ012-211459- Kent MD- 1059 AM EDT Fri Aug 20 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. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. MDZ015-211459- Queen Annes- 1059 AM EDT Fri Aug 20 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. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. MDZ019-211459- Talbot- 1059 AM EDT Fri Aug 20 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. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. MDZ020-211459- Caroline- 1059 AM EDT Fri Aug 20 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. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. ANZ430-211459- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- 1059 AM EDT Fri Aug 20 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...Saturday through Thursday. 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. ANZ431-211459- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- 1059 AM EDT Fri Aug 20 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...Saturday through Thursday. 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. ANZ450-211459- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- 1059 AM EDT Fri Aug 20 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...Saturday through Thursday. 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. ANZ451-211459- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- 1059 AM EDT Fri Aug 20 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...Saturday through Thursday. 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. ANZ452-211459- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- 1059 AM EDT Fri Aug 20 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...Saturday through Thursday. 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. ANZ453-211459- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Cape May County out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ454-211459- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- 1059 AM EDT Fri Aug 20 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to the mouth of Delaware Bay out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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. ANZ455-211459- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 1059 AM EDT Fri Aug 20 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...Saturday through Thursday. 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
Special weather statement, Aug 20, 5:39 AM EDT, 5 hours 28 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
539 AM EDT Fri Aug 20 2021
MDZ015-019-020-201015-
Queen Anne's MD-Talbot MD-Caroline MD-
539 AM EDT Fri Aug 20 2021
...A strong thunderstorm will impact portions of northeastern Talbot,
south central Queen Anne's and central Caroline Counties through 615
AM EDT...
At 538 AM EDT, Doppler radar was tracking a strong thunderstorm over
Skipton, or near Easton, moving northeast at 10 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Easton, Centerville, Denton, Centreville, Ridgely, Queen Anne, Starr,
Skipton, Jumptown, Matthews, Wye Mills, Griffin, Cordova, Carville,
Hope and Hillsboro.
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.
&&
LAT...LON 3878 7611 3890 7620 3911 7602 3884 7579
TIME...MOT...LOC 0938Z 237DEG 9KT 3886 7608
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
SFJSpecial weather statement, Aug 20, 6:09 AM EDT, 4 hours 58 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
609 AM EDT Fri Aug 20 2021
DEZ002-MDZ015-019-020-201045-
Kent DE-Queen Anne's MD-Talbot MD-Caroline MD-
609 AM EDT Fri Aug 20 2021
...A strong thunderstorm will impact portions of southwestern Kent,
northeastern Talbot, eastern Queen Anne's and central Caroline
Counties through 645 AM EDT...
At 609 AM EDT, Doppler radar was tracking a strong thunderstorm over
Queen Anne, or 9 miles southeast of Centerville, moving northeast at
20 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Easton, Denton, Greensboro, Oakland, Ridgely, Goldsboro, Queen Anne,
Starr, Skipton, Jumptown, Matthews, Wye Mills, Griffin, Cordova,
Carville, Hope, Hillsboro and Barclay.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3919 7591 3889 7561 3875 7604 3883 7612
3882 7613 3886 7616
TIME...MOT...LOC 1009Z 229DEG 16KT 3892 7597
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
SFJLocal storm report, Aug 20, 8:57 AM EDT, 2 hours 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
857 AM EDT FRI AUG 20 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0845 AM MARINE TSTM WIND 1 SE SLAUGHTER BEACH 38.90N 75.29W
08/20/2021 M51 MPH SUSSEX DE MESONET
&&
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 5:39 AM EDT | Special Weather Statement | PHI | Caroline | 36 min |
| Aug 20, 6:09 AM EDT | Special Weather Statement | PHI | Caroline | 36 min |
| Aug 20, 6:39 AM EDT | Areal Flood Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 8 hr |
Nearby
Areal Flood Advisories in Maryland, 2021Every areal flood advisory 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.