An unseasonably strong weather system affected the mid-Atlantic on April 30, 2021. A cold front moved through the region in the predawn hours of April 30, associated with low pressure moving into coastal New England.
Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
An unseasonably strong weather system affected the mid-Atlantic on April 30, 2021. A cold front moved through the region in the predawn hours of April 30, associated with low pressure moving into coastal New England. An upper level disturbance and a secondary cold front then approached late in the day on the 30th. This system interacted with the departing low pressure over New England, causing that low to rapidly intensify as it began moving towards the Canadian maritimes. With high pressure over the Midwest, this led to a very strong pressure gradient over the mid-Atlantic. Combined with strong dynamics associated with the secondary cold front, a lengthy period of windy conditions developed for much of the day on the 30th. Widespread wind gusts of 45 to 55 mph, with some gusts of 60 to 65 mph, occurred. This, combined with many trees across the region already bearing leaves, led to numerous instances of tree damage and power outages across the region. Scattered showers associated with the secondary front also helped to locally enhance wind damage. Winds finally began to decrease by the night of the 30th as the gradient gradually weakened.
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 Apr 30, 2:59 PM EST, 1 minute earlier.
Area Forecast Discussion
National Weather Service Mount Holly NJ
359 PM EDT Fri Apr 30 2021
.SYNOPSIS...
Strong northwest flow continues through Saturday with low
pressure across the Canadian Maritimes and high pressure across
the central and southern Appalachians. High pressure shifts
offshore of the southeast coast Saturday night into Sunday. A
backdoor cold front is forecast to sag into the Mid Atlantic
region Sunday night, before a sequence of low pressure systems
move across the region Monday through Wednesday.
&&
.NEAR TERM /THROUGH SATURDAY/...
Objective upper-air analysis at 12z indicates deep troughing in
eastern Canada and the northeastern U.S., with a 130+ kt 250-mb jet
streak from the Tennessee Valley east-northeast to off the Mid-
Atlantic coast. A strong perturbation, now evident on moisture-
channel imagery over the Great Lakes region, was sampled at 500 mb
in the Upper Midwest with an attendant 90+ kt jet streak surging
southeastward. The 500-mb temperatures were quite cold for this time
of year near the center of the low, with readings near or below -30C
in northern Michigan into central Ontario. Intense 850-mb cold
advection was occurring in the Great Lakes region and is racing
southeastward into the Appalachians this afternoon.
At the surface, an intense low off the coast of Maine was beginning
its pivot east-northeast to the Canadian Maritimes, with a strong
surface high building into Minnesota and vicinity. The pressure
gradient in between was leading to widespread strong winds in the
Northeast and Great Lakes. Several sites in our forecast area have
had peak gusts ranging from 45 to 55 mph so far, and this is in
advance of the most favorable timing for peak winds (more on this
below).
A band of showers in advance of the aforementioned perturbation had
developed in the central Appalachians and will likely move through
portions of the area late this afternoon and early this evening,
especially for the southern half of the CWA. Nudged PoPs upward just
a little bit more, based on upstream radar trends. With 40-50 kt
winds at the top of the mixed layer, would expect strong to locally
damaging wind gusts in proximity to these showers. Synoptic-scale
winds will then surge for a time after the stronger cold advection
sweeps across the area this evening, collocated with intense surface-
pressure rises behind the reinforcing front late this afternoon.
Models have trended slightly lower with gusts this
afternoon/evening, but they also have verified on the low side so
far today. As a result, continued to forecast winds higher than
guidance, with the peak timing generally 21z to 03z with a
diminishing trend thereafter as the surface pressure rises gradually
lessen. All of this said, the high wind warning was unchanged with
this update, with numerous impacts expected across the region.
With the cold air aloft moving into the region overnight and the
favorable northwest flow, expect some occasional showers to continue
in the southern Poconos. Temperatures will likely be cold enough for
some snowflakes. No impacts are expected other than potentially
shaking heads or "oohs and ahhs," depending on your winter-weather
fandom.
Temperatures are a challenge again, as the intense cold advection
will be fighting strong boundary-layer mixing. Models have trended
colder today, but my suspicion is that consensus is slightly too
cold given the strong winds expected. Nevertheless, expect 30s in
areas north of I-80 and 40s elsewhere.
Once the intense vort max blasts eastward on Saturday, sky cover
will improve, with mostly sunny conditions expected (though clouds
may increase late in the northwest). Highs on Saturday will be near
seasonal averages. Expect winds to continue diminishing slowly
through the day as the low in the Canadian Maritimes continues its
progress east-northeastward.
&&
.SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY NIGHT/...
An unsettled forecast begins late in the weekend during the
short term period, before continuing into the long term period
next week.
On Saturday night, a couple of weak surface troughs are
forecast to move across the area, while a couple of weak short
wave/vorticity impulses aloft move across the area as well.
There is not a significant amount of moisture forecast with
these impulses, but there could be just enough lift to squeeze
out a few showers across portions of northwest NJ and northeast
PA Saturday night.
For Sunday, a backdoor cold front is forecast to sag into the
area from the north, before stalling near or right over the
area. Again, there is still not much in the way of moisture
through Sunday night, so only a slight chance of showers is
expected across mainly northeast PA and northwest NJ.
&&
.LONG TERM /MONDAY THROUGH FRIDAY/...
An unsettled forecast will continue into the first half of next
week, before a brief drying out period.
The backdoor cold front that is forecast to remain nearly
stationary across the area on Monday, before multiple waves of
low pressure lift across the Mid Atlantic and northeast states
and lift the front back northward as a warm front, before
pulling a cold front across the area. There remains quite a bit
of uncertainty with respect to where the stationary front stalls
out and when/where the surface lows will develop and move along
the boundary. There will be a chance of showers from Monday
through Wednesday, with even a chance of thunderstorms Tuesday
into Wednesday with the passage of a cold front.
Once the cold front moves through the area and the associated
low pressure lifts to the northeast, winds will shift to the
northwest and potentially become gusty on Thursday. This will
allow a brief drying period, but this may not last long.
Model guidance is indicating the potential for a coastal storm
to affect the east coast next Friday into Saturday. The timing
and location of the system vary from model to model, however, if
the storm remains close to land, a period of heavy rain and
gusty winds will be possible for the area, especially for
coastal areas.
&&
.AVIATION /20Z FRIDAY THROUGH WEDNESDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.
Through this evening...Mainly VFR (SCT-BKN CIGs 4000-8000 feet) with
northwest winds 20 to 30 kt with gusts of 40+ kt at times. Peak
gusts may approach 50 kt late this afternoon through late evening
(generally 21z to 03z). Additionally, cannot rule out an isolated
shower or two, with very strong/erratic gusts in their proximity,
with the best chances of that through 22z. Moderate confidence.
Overnight...VFR with northwest winds diminishing to 15 to 25 kt with
gusts around 30 kt. High confidence.
Saturday...VFR with northwest winds 10 to 20 kt with gusts up to 30
kt. Winds will diminish and become more westerly during the
afternoon. Moderate confidence.
Outlook...
Saturday night-Sunday night...Generally VFR conditions
expected. Southwest to west winds 5-10 knots, gusting to 15-20
knots during the day Sunday.
Monday-Monday night...VFR in the morning, then a chance of MVFR
or lower conditions in the afternoon and evening with a chance
of rain. South to southwest winds during the day, becoming light
and variable overnight.
Tuesday-Wednesday...Chance of showers and thunderstorms which
may lead to locally MVFR or lower conditions. Otherwise, mostly
VFR. West to southwest winds 5-10 knots, shifting to northwest
later Tuesday or Wednesday with gusts 15-20 knots.
&&
.MARINE...
The gale warning was converted to a storm warning earlier this
afternoon for all waters, as observations on the coast have already
approached criteria, especially in proximity to any showers that
move through. However, the primary concern remains during the
evening hours, after an intense disturbance moves through the region
with strong cold advection sweeping through. Low-level thermal
profiles become quite favorable for deep mixing over the waters. A
period of very strong (40-50+ kt) wind gusts is likely between
around 7 pm and 3 am, with a rapid diminishing trend thereafter. A
brief gale warning will likely be required following the storm
warning, with gales likely ending by 10 am or so. Small craft
advisory conditions will then continue through mid-afternoon, before
winds and seas both subside below criteria by the end of the day.
OUTLOOK...
Saturday night...Small Craft Advisory conditions possible overnight
Saturday.
Sunday-Wednesday...Conditions are expected to remain mostly below
advisory levels through the period. However, winds will gust around
20 knots at times and seas will build to around 4 feet at times.
&&
.FIRE WEATHER...
Relative humidity values will be low again Saturday, but will
likely lower into the low 20s, with upper teens possible for
some areas. Winds will not be as windy as Friday, but still gust
20-30 mph at times. After continued coordination with state
fire weather partners from across the area, most of the region
will be sufficiently wet and/or greened-up to avoid any
concerns. The one exception to this is Pine Barrens region of
New Jersey, where the green-up is slower where a Special
Weather Statement will likely be issued again.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...High Wind Warning until 4 AM EDT Saturday for PAZ054-055-
060>062-070-071-101>106.
NJ...High Wind Warning until 4 AM EDT Saturday for NJZ001-007>010-
012>027.
DE...High Wind Warning until 4 AM EDT Saturday for DEZ001>004.
MD...High Wind Warning until 4 AM EDT Saturday for MDZ012-015-019-
020.
MARINE...Storm Warning until 6 AM EDT Saturday for ANZ430-431-450>455.
&&
Synopsis...Robertson
Near Term...CMS
Short Term...Robertson
Long Term...Robertson
Aviation...CMS/Robertson
Marine...CMS/Robertson
Fire Weather...RobertsonHazardous Weather Outlook National Weather Service Mount Holly NJ 0249 PM EDT Fri Apr 30 2021 DEZ001-011849- New Castle- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for New Castle County in Delaware. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. DEZ002-011849- Kent- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. DEZ003-011849- Inland Sussex- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. DEZ004-011849- Delaware Beaches- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. PAZ054-011849- Carbon- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. PAZ055-011849- Monroe- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. PAZ060-011849- Berks- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. PAZ061-011849- Lehigh- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. PAZ062-011849- Northampton- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. PAZ070-011849- Delaware- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Delaware County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. PAZ071-011849- Philadelphia- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Philadelphia County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. PAZ101-011849- Western Chester- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for western Chester County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. PAZ102-011849- Eastern Chester- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for eastern Chester County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. PAZ103-011849- Western Montgomery- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for western Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. PAZ104-011849- Eastern Montgomery- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for eastern Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. PAZ105-011849- Upper Bucks- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for upper Bucks County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. PAZ106-011849- Lower Bucks- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for lower Bucks County in Pennsylvania. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ001-011849- Sussex- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Sussex County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ007-011849- Warren- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Warren County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ008-011849- Morris- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Morris County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ009-011849- Hunterdon- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Hunterdon County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ010-011849- Somerset- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Somerset County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ012-011849- Middlesex- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Middlesex County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ013-011849- Western Monmouth- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for western Monmouth County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ014-011849- Eastern Monmouth- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for eastern Monmouth County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ015-011849- Mercer- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Mercer County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ016-011849- Salem- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Salem County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ017-011849- Gloucester- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Gloucester County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ018-011849- Camden- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Camden County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ019-011849- Northwestern Burlington- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for northwestern Burlington County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ020-011849- Ocean- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for inland portions of Ocean County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ021-011849- Cumberland- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Cumberland County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ022-011849- Atlantic- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for inland portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ023-011849- Cape May- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for Cape May County excluding the Atlantic coast in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. NJZ024-011849- Atlantic Coastal Cape May- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. NJZ025-011849- Coastal Atlantic- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. NJZ026-011849- Coastal Ocean- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. NJZ027-011849- Southeastern Burlington- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for southeastern Burlington County in New Jersey. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .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. MDZ012-011849- Kent MD- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. MDZ015-011849- Queen Annes- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. MDZ019-011849- Talbot- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. MDZ020-011849- Caroline- 0249 PM EDT Fri Apr 30 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. High Wind Warning. .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. ANZ430-011849- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for upper Delaware Bay. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Storm Warning. .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. ANZ431-011849- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for lower Delaware Bay. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Storm Warning. .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. ANZ450-011849- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Monmouth County out 20 nm. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Storm Warning. .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. ANZ451-011849- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Ocean County out 20 nm. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Storm Warning. .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. ANZ452-011849- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Atlantic County out 20 nm. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Storm Warning. .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. ANZ453-011849- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Cape May County out 20 nm. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Storm Warning. .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. ANZ454-011849- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to the mouth of Delaware Bay out 20 nm. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Storm Warning. .DAYS TWO THROUGH SEVEN...Saturday through 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. ANZ455-011849- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 0249 PM EDT Fri Apr 30 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Sussex County out 20 nm. .DAY ONE...Through tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Storm Warning. .DAYS TWO THROUGH SEVEN...Saturday through 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.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
313 PM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0310 PM NON-TSTM WND DMG 1 N WHITEMARSH TWP 40.10N 75.25W
04/30/2021 MONTGOMERY PA FIRE DEPT/RESCUE
TREE DOWN ON BARBERRY DR AT PHEASANT LN.
&&
JEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
316 PM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0306 PM NON-TSTM WND DMG 2 N MOUNT LAUREL 39.97N 74.89W
04/30/2021 BURLINGTON NJ PUBLIC
MPING REPORT OF A DOWNED TREE.
&&
JEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
327 PM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0310 PM NON-TSTM WND DMG KUNKLETOWN 40.85N 75.45W
04/30/2021 MONROE PA DEPT OF HIGHWAYS
WIRES DOWN ON KUNKLETOWN RD.
&&
JEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
337 PM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0330 PM NON-TSTM WND DMG TACONY 40.03N 75.05W
04/30/2021 PHILADELPHIA PA PUBLIC
MPING REPORT OF LARGE TREE LIMBS OR POWER
LINES DOWN.
&&
JEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
339 PM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0321 PM NON-TSTM WND DMG 1 N RINGOES 40.46N 74.86W
04/30/2021 HUNTERDON NJ DEPT OF HIGHWAYS
DOWNED TREE AND WIRES ON US-202 SOUTHBOUND
NORTH OF EVERITT RD. ALL LANES CLOSED.
&&
JEOPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
350 PM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0345 PM NON-TSTM WND GST FORKS TWP 40.73N 75.19W
04/30/2021 M52 MPH NORTHAMPTON PA TRAINED SPOTTER
&&
JEOThe national radar mosaic for the moment the first event began.
3 high wind. Local standard time, as filed.
Tree damage and power outages were reported, including a downed tree which closed a portion of Route 52. Measured gusts of 50 to 60 mph were reported in surrounding areas.
Tree damage and power outages were reported. A measured gust of 57 mph was also observed west of Lewes.
Multiple wind gusts in excess of 50 mph were reported along the Delaware seashore. In addition, an incident involving injury occurred near Fenwick Island. Some siding or construction material was blown off of a building, which struck and injured one person and also damaged multiple vehicles.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Delaware in 2021Every state in 2021This day in weather historyWarnings in Delaware, April 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: 947983, 947984, 947986.