A winter storm brough moderate to heavy snowfall to much of Delmarva. Totals ranged from 3-4 in northern Delaware, to 6-8 across the central and southern portions of the state.
Every event with a place to put it; 4 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.
A winter storm brough moderate to heavy snowfall to much of Delmarva. Totals ranged from 3-4 in northern Delaware, to 6-8 across the central and southern portions of the state.
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 11, 12:59 PM EST, 1 hour 31 minutes earlier.
Area Forecast Discussion
National Weather Service Mount Holly NJ
1259 PM EST Tue Feb 11 2025
.SYNOPSIS...
An area of low pressure slides by to our south late today and
tonight before moving away early Wednesday morning. Another low
pressure system tracks up the Ohio Valley and eastern Great Lakes
late Wednesday into Thursday, pulling a cold front across our area
by later Thursday. High pressure briefly builds in later Friday,
then another low with its warm and cold fronts moves through over
the weekend. High pressure then builds toward our area early next
week.
&&
.NEAR TERM /THROUGH TONIGHT/...
Overall, the near term forecast remains on track as low
pressure continues tracking east into the Deep South this
afternoon. As it does so, this low will transfer its energy to a
secondary low will form off the coast of North Carolina early
this evening. This secondary low will track off the coast of the
DelMarVa later on tonight. Overruning precipitation has begun to
develop out ahead of the low and move northward into DelMarVa.
Temperatures are now above freezing for most locations early
this afternoon. However, with dew points still in the teens,
wet-bulb temps remain at or below freezing across most of the
region. Therefore, as precipitation saturates the boundary
layer, surface temperatures will cool and snow is still
expected at the onset this afternoon. Light to moderate snow
will gradually progress northward through the the rest of the
afternoon and into the evening from southwest to northeast,
ultimately reaching the northern portions of the area by mid to
late evening. Periods of heavy snow will be possible over the
DelMarVa and portions of southern New Jersey this evening into
tonight as well. This is supported quite well in some of the hi-
res guidance which depicts a strong area of frontogenesis near
850 mb early this evening. This may pose a threat to some areas
across the central DelMarVa where some mixing issues may occur
later tonight. With this being said however, there likely will
be a localized snow band that develops with enhanced snowfall
rates. Where this occurs is still uncertain as we'll likely need
to observe this in real time. However, the greatest likelihood
will be somewhere over the north-central Delmarva into south
Jersey.
Winter Storm Warnings remain in effect through 7 AM Wednesday
where 4-7 inches are expected. Again, there will likely be a
localized maxima which receives greater than 7 inches, depending
on and if the heavier snow band develops. Snowfall totals
decrease further north with 2-4 inches expected over much of
northern DE, southeast PA, and central NJ. Winter Weather
Advisories remain in effect until 7 AM Wednesday for these
areas. Across northeast PA and into northern NJ, snowfall totals
up to 2 inches are expected.
The system will begin to depart early Wednesday morning as snow
begins to taper off from west to east. Low temperatures tonight
are expected to be in the low 20s to low 30s.
&&
.SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/...
Unsettled/messy conditions as another storm will impact our area.
As low pressure moves out to sea Wednesday morning, high pressure
centered across Ontario/Quebec Canada will wedge its way down into
our area. There should be a lull in the precipitation for much of
the area during the day Wednesday, however an upper-level trough
approaching from the west will drive surface low pressure
northeastward up the Ohio Valley later Wednesday before crossing the
eastern Great Lakes region early Thursday. As this occurs, surface
high pressure to our north shifts eastward and the cold air damming
signature gradually weakens. The residual cold air near the surface
however may be stubborn especially north of I-78 as a weak surface
low may develop on the northbound warm front. This may halt the
northward progression of the warm front as the parent low in the
eastern Great Lakes occludes. Plenty of large scale forcing will
result in an expanding precipitation shield late Wednesday and
especially during Wednesday night. A strengthening low-level jet
will also enhance the lift for a time Wednesday night. Thermal
profiles look to support some snow initially for some areas then to
some sort of a wintry mix mess, and these details will depend on the
depth of the warm layer aloft as well as the depth of the cold air
closer to the surface. Some accumulating snow is forecast near and
north of I-78 with a couple of inches possible for the I-80 corridor
especially. This will transition to a wintry mix then some freezing
rain as the warm layer aloft deepens. Farther to the south and east,
mostly rain is forecast as enough warming overtakes these areas.
While the snow/sleet amounts are below advisory criteria, the
forecast ice accretion of up to 0.10 inches would result in the
eventual need for a Winter Weather Advisory for areas north and west
of I-95 and especially for the I-78 corridor northward.
The precipitation is much needed given the continued significant
drought conditions across much of our region. Some of the
precipitation especially across the coastal plain could be enhanced
by a small convective contribution due to some weak elevated
instability. Temperatures should climb through the 40s with even
some 50s across the coastal plain Thursday ahead of the cold front.
The wintry mix/ice across most of the northern areas should
transition to all rain as warming overtakes these locations as well
ahead of a cold front Thursday morning. The lingering cold air
though at the surface should last the longest in the Pocono plateau
area to far northwest New Jersey. The cold front itself should take
the main moisture plume eastward fast enough before the colder air
rushes back in and therefore limiting any change back to a wintry
mix or snow before ending. Cannot rule out some snow showers though
behind the cold front for a time into the Pocono region as the
northwest flow kicks in. It will be drying out especially Thursday
night along with an increasing breeze as much colder air advects in
through the night.
&&
.LONG TERM /FRIDAY THROUGH MONDAY/...
Summary...Dry and blustery to start then the weekend features
another storm along with some milder air, followed by drying and
turning much colder early next week.
Synoptic Overview...An upper-level trough is forecast to be exiting
the Northeast to start Friday with the flow aloft becoming more
zonal to start the weekend. The flow aloft then quickly backs ahead
of an amplifying trough across the Plains and Midwest. This trough
then translates eastward and lifts across the Northeast and Mid-
Atlantic regions later in the weekend. This trough, while weakening
some, then remains across the Northeast early next week. At the
surface, expansive high pressure builds across the area later Friday
before quickly shifting offshore by early Saturday. Low pressure and
its warm and cold fronts move through Saturday night into Sunday
morning, then high pressure builds toward our area from the Ohio
Valley during Monday.
For Friday...As an upper-level trough exits the Northeast, the flow
aloft turns more zonal. Surface high pressure is forecast to build
over our area later in the day into the nighttime hours. A tight
pressure gradient is forecast to be in place for a good part of the
day and this will result in a gusty northwesterly wind. The winds
should drop off quickly later in the afternoon and evening as high
pressure begins to settle more into our area. Daytime temperatures
are forecast to peak into the 30s to near 40 except some 20s in the
Poconos, then all areas drop to the mid/upper teens to 20s at night.
For Saturday and Sunday...An upper-level trough is forecast to be
strengthening across the Plains and Midwest to start Saturday, which
then translates eastward. Meanwhile, surface high pressure quickly
shifts offshore to start Saturday with return flow strengthening
which results in increasing warm air advection and also moisture
advection. Surface low pressure strengthens as it tracks up the Ohio
Valley and eastern Great Lakes through early Sunday morning. This
track will place most if not all of our area in the warm sector
Sunday, with temperatures surging into the 50s for many places with
even around 60 possible in parts of Delmarva. In addition, plenty of
Gulf moisture will be advecting northward ahead of the cold front
and therefore much needed rainfall is expected. However, some snow
or a wintry mix looks to occur at the onset mainly north and west of
I-95 but this should change to rain quickly from south to north.
Some guidance hinting at a change to some mixed precipitation or
snow before ending near and north of I-78 later Sunday as the cold
front moves offshore, however this is of lower confidence. Drying
out Sunday night with an increasing wind along with much colder air
arriving.
For Monday...A much colder day as an upper-level trough is in place.
Strong low pressure moving up across the Canadian Maritimes along
with high pressure building into the Ohio Valley will place our
region within an area of a tight pressure gradient. As a result,
blustery conditions are forecast.
&&
.AVIATION /18Z TUESDAY THROUGH SUNDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas...
Today...VFR expected through early afternoon under overcast skies.
By 21-23Z, expect to see periods of MVFR conditions move into
the region from southwest to northeast with the onset of snow.
Light and variable winds this morning, settling out of the
south around 5-8 kt this afternoon. Moderate confidence
overall.
Tonight...MVFR conditions becoming IFR conditions likely, with
potential LIFR conditions at all terminals except for KRDG/KABE.
Periods of light to moderate snow expected, possibly heavy at
times. Light southerly winds early shift to northeast winds
around 5-10 kt. Moderate-low confidence.
Outlook...
Wednesday and Thursday...Conditions may improve to VFR for a time in
the morning, however sub-VFR conditions then occur as another round
of a wintry mix occurs which changes to rain. Greatest chance for a
period of mixed precipitation is at KRDG and KABE. The conditions
then improve to VFR by later Thursday as any lingering rain ends.
Low-level wind shear possible Wednesday night into early Thursday.
Friday...VFR. West-northwest wind gusts up to 25 knots.
Saturday...Sub-VFR conditions and precipitation developing.
&&
.MARINE...
No marine headlines are in effect for today. North-northeast winds
around 5-10 kt this morning will become south-southeast this
afternoon. Seas of 2 feet or less. Light to moderate snow likely in
the afternoon.
For tonight, light southeast winds early will become northeast winds
and strengthen to around 15-20 kt with gusts up to 25 kt. Seas of 2-
4 feet. Periods of rain and/or snow likely.
As a result, a Small Craft Advisory has been issued for Atlantic
coastal waters south of Cape May beginning at 12 AM Wednesday, and
for Atlantic coastal waters south of Little Egg Inlet to Cape May
beginning at 3 AM Wednesday.
Outlook...
Wednesday and Thursday...Small Craft Advisory conditions, longer on
the ocean zones, due to gusty winds and elevated seas.
Friday...Small Craft Advisory conditions ease as winds gradually
diminish and seas subside.
Saturday...Small Craft Advisory conditions may develop mainly at
night.
&&
.TIDES/COASTAL FLOODING...
The effects of the full moon on Wednesday combined with a second
storm system with gusty onshore winds looks to produce a period of
low-end minor tidal flooding at many coastal areas. The departures
are mostly around 0.3 feet at the most vulnerable sites. We well
continue to monitor in the event any Coastal Flood Advisories are
needed.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Winter Weather Advisory from 4 PM this afternoon to 7 AM EST
Wednesday for PAZ070-071-101-102-104-106.
NJ...Winter Weather Advisory from 4 PM this afternoon to 7 AM EST
Wednesday for NJZ013>020-026-027.
Winter Storm Warning from 4 PM this afternoon to 7 AM EST
Wednesday for NJZ021>025.
DE...Winter Weather Advisory from 4 PM this afternoon to 7 AM EST
Wednesday for DEZ001.
Winter Storm Warning until 7 AM EST Wednesday for DEZ002>004.
MD...Winter Storm Warning until 7 AM EST Wednesday for MDZ012-015-
019-020.
MARINE...Small Craft Advisory from 1 PM Wednesday to 1 AM EST Thursday
for ANZ430-431.
Small Craft Advisory from 6 AM Wednesday to 7 AM EST Thursday
for ANZ450-451.
Small Craft Advisory from 3 AM Wednesday to 7 AM EST Thursday
for ANZ452-453.
Small Craft Advisory from midnight tonight to 7 AM EST
Thursday for ANZ454-455.
&&
SYNOPSIS...Gorse
NEAR TERM...AKL/DeSilva
SHORT TERM...Gorse
LONG TERM...Gorse
AVIATION...AKL/DeSilva/Gorse
MARINE...DeSilva/Gorse
TIDES/COASTAL FLOODING...WFO PHIThe national radar mosaic for the moment the first event began.
3 winter storm, 1 winter weather. Local standard time, as filed.
Moderate to heavy snowfall occurred with totals around 5-8. The highest reported total was 8.3 in Milton.
Moderate to heavy snowfall occurred with totals around 4-6. The highest reported total was 5.0 in Bayville.
Moderate to heavy snowfall occurred with totals around 6-8. The highest reported total was 8.3 in Magnolia and near Hazlettville.
Light to moderate snowfall occurred with totals around 3-4. The highest reported total was 4.1 in Blackbird.
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: 1236735, 1236738, 1236734, 1236732.