A warm front attempting to lift northward across the area resulted in areas of dense fog starting early on February 13th. After dawn, the front began to retreat and the fog started to dissipate.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PHI wrote it up.
A warm front attempting to lift northward across the area resulted in areas of dense fog starting early on February 13th. After dawn, the front began to retreat and the fog started to dissipate.
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 Feb 13, 3:36 AM EST, 2 hours 24 minutes earlier.
Area Forecast Discussion
National Weather Service Mount Holly NJ
336 AM EST Thu Feb 13 2025
.SYNOPSIS...
A low pressure system tracks across the eastern Great Lakes today,
pulling a cold front across our area by later today. High pressure
briefly builds in later Friday, then a much stronger low with its
warm and cold fronts moves through over the weekend. Arctic high
pressure then builds toward our area early next week.
&&
.NEAR TERM /THROUGH TONIGHT/...
A low pressure system will continue to impact the region through the
first half of today, with periods of rain, areas of fog, and some
lingering light freezing rain for the higher elevations north of I-
78. Some additional ice accretion up to 0.1" is possible within the
remaining Winter Weather Advisory area. Elsewhere, an additional
0.25-0.50" of rainfall can be expected through the remainder of the
morning, along with low clouds and areas of fog.
A warm front will be located well to our south with a cold front
approaching from the west. The cold front will arrive later this
afternoon and pass offshore early in the evening. As the rain
departs later this morning, surface flow will turn southwesterly and
increase as we get a brief ~6 hour period of warm and dry air
advection ahead of the cold front. The result is expected to be
skies gradually breaking up with temperatures surging to near 50
degrees in many areas, even low to mid 40s for areas north of I-78
by this afternoon. The southwest winds could gust to near 20-30 mph
at times in the afternoon, however the strongest winds will likely
occur in the wake of the cold front during the evening.
Following FROPA early this evening, temperatures will drop
precipitously into the 30s by late evening then into the 20s
overnight. Wind chills will be well into the teens by Friday
morning, in stark contrast to the near 50 degrees temperatures just
12 hours prior. During the peak surge of cold advection in the wake
of the front between 4 PM and 10 PM from west to east, low level
winds from the northwest are expected to increase significantly due
to impressive surface pressure rises and arrival of the primary
trough axis aloft. BUFKIT profiles indicate peak wind speeds within
the boundary layer of around 30-35 kts. These should translate to
peak wind gusts at the surface around 30-40 mph this evening from
around the 4 PM to midnight timeframe. The wind gusts will likely
remain below advisory criteria, but it will be a noticeably windy
period this evening. Winds will gradually lessen overnight to gusts
around 20-25 mph by Friday morning.
&&
.SHORT TERM /FRIDAY THROUGH SUNDAY NIGHT/...
A much colder airmass settles in for Friday into Saturday, then much
warmer air arrives Sunday ahead of a strong cold front. A strong
storm system moves through during the weekend bringing widespread,
and potentially heavy precipitation (especially rain).
The center of cold high pressure across the upper Ohio Valley Friday
slowly builds eastward and eventually settles over our region Friday
night. It then shifts to our north and east into Saturday. A tight
pressure gradient ahead of this surface high combined with cold air
advection and modest flow aloft will result in a gusty wind Friday.
The wind will then diminish quickly later Friday afternoon and
evening as the mixing wanes and surface high pressure starts to
settle right over our area. It will be cold with highs in the 30s,
except 20s over the Pocono Plateau and the higher terrain of
northwest New Jersey.
As a storm system organizes across the Mississippi Valley, a
developing warm front will extend to its northeast and east. This
warm front will start to make an approach to our area during
Saturday. Clouds will be on the increase Friday night. The extent of
these clouds will determine how cold it gets Friday night as the
surface dew points initially will be rather low before some increase
begins.
An active weekend in the weather department as low pressure Saturday
over the Mississippi Valley tracks northeastward through Sunday.
This low tracks near or just north of our area by later in the
weekend. A weak area of low pressure however may develop in the
vicinity of Delmarva on the advancing warm front. It this occurs,
the stronger warming may not get as far north/inland with some
residual chilly air trapped closest to the ground. The developing
warm sector however looks to get into at least the coastal plain. As
stronger forcing for ascent arrives, enhanced by strengthening warm
air advection and a low-level jet, precipitation should expand east
and southeastward during the day Saturday. It will battle some dry
air initially, however at least some guidance has this starting as
snow before changing to a wintry mix then to rain northward. If
enough chilly, dry air hangs on longer then some snow and sleet
accumulations are probable mostly I-95 north and west but especially
I-78 northward. As the surface low moves into the vicinity of
western Pennsylvania by early Sunday morning, temperatures will
increase Saturday night across most if not all of our area. This
will be most pronounced south of the warm front. This will result in
any lingering frozen or freezing precipitation across the northern
areas to change to rain by early Sunday morning. The amount of snow,
sleet and freezing rain will depend on how quick the warming
northward occurs.
Rain continues into Sunday although it may become more showery with
temperatures for most areas surging into the 50s as the warm sector
moves northward. Across the coastal plain, temperatures are forecast
to get into the low 60s for some areas ahead of the cold front.
Strong dynamics with this deepening storm tracking near or just
north of our area will also have a deep plume of moisture. The
precipitable water values are forecast to increase to 1.0-1.5 inches
Saturday night and the first half of Sunday ahead of the strong cold
front. There may also be some convective contribution occurring as
some weak instability gets pulled northward. While some thunder
cannot be ruled out Sunday across mainly parts of the coastal plain
ahead of or with the cold front, confidence is not high with this.
Total rainfall amounts look to be 1-2 inches, and while this is very
much needed given the continuing serious drought conditions there is
a low risk for excessive rainfall. By the time this storm occurs,
most of our area will not have any snow cover. Most waterways are
running low as of this writing, however if the rainfall rates become
excessive at times with a convective contribution then there could
be some flooding concern due to quick runoff situations. The Raritan
basin (Millstone) however is having some higher flow compared to
others but it is currently set at normal levels.
The rain/showers should quickly end during the second half of Sunday
as the plume of deep moisture and the cold front sweep eastward and
offshore. The strong warm air advection quickly changes to strong
cold air advection with it turning much colder Sunday night. Areas
where the warm sector is able to reach, deepening boundary layer
mixing Sunday ahead of the cold front will result in a gusty
southwest to west-southwest wind. All areas will then have a period
of gusty west to northwest winds behind the cold front through
Sunday night.
&&
.LONG TERM /MONDAY THROUGH WEDNESDAY/...
Summary...A stretch of very cold air and dry conditions, however a
storm system may then approach later Wednesday.
Synoptic Overview...An upper-level trough is forecast to become
centered in the vicinity of the Canadian Maritimes Monday into
Tuesday, with its axis extending westward across the Great Lakes to
the Midwest. This results in zonal flow aloft across much of the
East. This trough gradually shifts eastward into Wednesday with its
western extended trough axis possibly weakening. Another upper-level
trough organizes across the Plains and Midwest. An expansive area of
high pressure centered over the northern Plains to then the central
to southern Plains gradually extends into our area by Wednesday. The
aforementioned trough however may send some ripples of energy along
a strengthening baroclinic zone well to our south. The northern
extend of this feature however has much uncertainty with it
Wednesday and beyond.
For Monday and Tuesday...As the core of an upper-level trough lifts
across the Canadian Maritimes, a trailing axis extends westward to
the Great Lakes and into the Midwest. This results in a zonal flow
aloft across our region. Our weather will be driven by a strong
arctic high pressure system initially centered in the northern
Plains, and deep low pressure in the Canadian Maritimes. Strong cold
air advection continues Monday and with a tight pressure gradient
across our region between the two aforementioned systems, it will be
a breezy to windy day Monday. This will be enhanced by nearly 40
knots of wind at 850 mb which should partially mix down especially
during the daylight hours. A similar setup occurs on Tuesday,
although the flow aloft is forecast to be a little weaker and
therefore the winds will not be as strong as Monday. Temperatures
are forecast to be well below average as arctic air is in place. The
strong winds will drive down the wind chills as well.
For Wednesday...An upper-level trough across eastern Canada
extending back across the Great Lakes may shift eastward during
Wednesday. Meanwhile energy ejecting quickly eastward from a new
trough in the Plains may energize a strengthening baroclinic zone
off the Mid-Atlantic and Southeast U.S. coasts. A surface low may
develop in the vicinity of this feature. Some guidance expands
northward a precipitation shield as some 850-700 mb frontogenesis
gets going due to some tightening of the thermal fields aloft. The
evolution of this is of low confidence given it is nearly a week
away, however these southern slider type systems will need to be
watched especially as cold/dry air continues to be in place under a
northerly low-level flow.
&&
.AVIATION /09Z THURSDAY THROUGH MONDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.
Through 15Z...IFR/LIFR for all terminals in low clouds, fog,
drizzle, and periods of rain. The rain and fog will abate by late
morning. Winds mainly easterly around 5-10 kts, shifting southerly
at MIV/ACY by 12Z. High confidence in prevailing IFR conditions.
After 15Z...Initially IFR ceilings and some lingering IFR or MVFR
visibilities improving to VFR between 18-21Z. This improvement will
likely occur more abruptly than the TAFs indicate, however
confidence on exact timing of improvement is moderate at best. Winds
shifting southwest to west and increasing to 10-15 kts with gusts
near 20-25 kts possible between 18-21Z. Winds shifting WNW and
increasing to near 20 kts with gusts near 30 kts after 21Z.
Tonight...VFR. WNW to NW winds 15-20 kts with gusts near 30 kts
through 03-06Z, lessening overnight with gusts remaining near 20-25
kts at times. High confidence.
Outlook...
Friday...VFR. Northwest wind gusts to 25 knots, quickly diminishing
later in the afternoon and evening.
Saturday and Sunday...Sub-VFR conditions along with rain. Some areas
start as snow or a wintry mix Saturday before changing to rain. A
period of low-level wind shear probable, and west-southwest to west-
northwest winds Sunday gust to around 25 knots.
Monday...VFR. Northwest wind gusts to around 30 knots.
&&
.MARINE...
A Dense Fog Advisory remains in effect for all coastal waters
through this morning. Areas of visibility 1 NM or less at times in
rain, drizzle, and fog. Small Craft Advisory conditions through
today on the Atlantic waters with seas lingering near 4-7 feet.
Easterly winds shifting south then southwest through the day and
increasing to near 15-20 kts by afternoon.
A Gale Warning remains in effect for tonight. A strong cold front
pushing offshore will cause a sharp increase in northwest winds to
25-30 kts with gusts up to 35 kts this evening. The gales will abate
by 4 AM or so, the SCA conditions likely following into Friday.
Outlook...
Friday...Small Craft Advisory conditions, which then diminish
during the afternoon.
Saturday...Small Craft Advisory conditions may develop late at night.
Sunday...Small Craft Advisory conditions, with Gale conditions
probable at night.
Monday...Gale conditions probable.
&&
.TIDES/COASTAL FLOODING...
The effects of yesterday's full moon combined with modest onshore
winds should produce low-end minor tidal flooding along the northern
New Jersey coast with this morning's high tide. The Coastal Flood
Advisory therefore remains in effect for Middlesex and Monmouth
counties. Elsewhere, water levels are anticipated to be below minor
flooding or below the criteria needed for an advisory. No additional
minor flooding is expected after this morning's high tide as winds
turn offshore this afternoon and tonight.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Winter Weather Advisory until 10 AM EST this morning for
PAZ054-055.
Winter Weather Advisory until 4 AM EST early this morning for
PAZ060>062.
NJ...Winter Weather Advisory until 9 AM EST this morning for NJZ001-
007-008.
Coastal Flood Advisory until noon EST today for NJZ012>014.
DE...None.
MD...None.
MARINE...Dense Fog Advisory until noon EST today for ANZ430-431-452>455.
Gale Warning from 6 PM this evening to 6 AM EST Friday for
ANZ430-431-450>455.
Small Craft Advisory until 6 PM EST this evening for
ANZ450>455.
Dense Fog Advisory until noon EST today for ANZ450-451.
&&
SYNOPSIS...Fitzsimmons/Gorse
NEAR TERM...Staarmann
SHORT TERM...Fitzsimmons/Gorse
LONG TERM...Gorse
AVIATION...Gorse/Staarmann
MARINE...Gorse/Staarmann
TIDES/COASTAL FLOODING...WFO PHIPreliminary Local Storm Report
National Weather Service Mount Holly NJ
124 AM EST Thu Feb 13 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0756 PM Snow 1 N Mount Pocono 41.13N 75.36W
02/12/2025 M0.4 Inch Monroe PA Cocorahs
&&
StaarmannPreliminary Local Storm Report
National Weather Service Mount Holly NJ
430 AM EST Thu Feb 13 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0424 AM Snow 4 WSW Wantage Twp 41.22N 74.68W
02/13/2025 M0.2 Inch Sussex NJ Trained Spotter
Snow and sleet.
&&
GorsePreliminary Local Storm Report
National Weather Service Mount Holly NJ
433 AM EST Thu Feb 13 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0424 AM Freezing Rain 4 WSW Wantage Twp 41.22N 74.68W
02/13/2025 E0.05 Inch Sussex NJ Trained Spotter
Light glaze of ice. Heavy freezing drizzle
occurring at the time of report.
&&
GorsePreliminary Local Storm Report
National Weather Service Mount Holly NJ
442 AM EST Thu Feb 13 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0400 AM Freezing Rain Pocono Mountains Munici 41.14N 75.38W
02/13/2025 M0.43 Inch Monroe PA ASOS
Combination of freezing rain and freezing
fog.
0100 AM Freezing Rain Lehigh Valley Internati 40.65N 75.44W
02/13/2025 M0.06 Inch Lehigh PA ASOS
0100 AM Freezing Rain Reading Regional Airpor 40.38N 75.96W
02/13/2025 M0.01 Inch Berks PA ASOS
&&
GorsePreliminary Local Storm Report
National Weather Service Mount Holly NJ
447 AM EST Thu Feb 13 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0100 AM Freezing Rain Pottstown Municipal Air 40.26N 75.67W
02/13/2025 M0.03 Inch Montgomery PA ASOS
&&
GorsePreliminary Local Storm Report
National Weather Service Mount Holly NJ
449 AM EST Thu Feb 13 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0100 AM Freezing Rain Doylestown Airport 40.33N 75.12W
02/13/2025 M0.01 Inch Bucks PA ASOS
&&
GorseThe national radar mosaic for the moment the first event began.
3 dense fog. Local standard time, as filed.
Several hours of dense fog was observed at Delaware Coastal Airport.
Several hours of dense fog was observed at Delaware Coastal Airport.
Several hours of dense fog was observed at Delaware Airpark.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Delaware in 2025Every state in 2025This day in weather historyWarnings in Delaware, February 2025
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: 1238281, 1238282, 1238283.