Severe Thunderstorm Warning 163, NWS Philadelphia/Mount Holly

784 
WWUS51 KPHI 092146
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
546 PM EDT Thu Jul 9 2026

DEC003-PAC045-092156-
/O.CAN.KPHI.SV.W.0163.000000T0000Z-260709T2215Z/
New Castle DE-Delaware PA-
546 PM EDT Thu Jul 9 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEW CASTLE AND
SOUTHEASTERN DELAWARE COUNTIES IS CANCELLED...

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern Delaware...and southern New Jersey.

LAT...LON 3979 7542 3982 7538 3985 7509 3961 7506
      3965 7548
TIME...MOT...LOC 2146Z 268DEG 19KT 3974 7528 

$$

NJC015-033-092215-
/O.CON.KPHI.SV.W.0163.000000T0000Z-260709T2215Z/
Salem NJ-Gloucester NJ-
546 PM EDT Thu Jul 9 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHERN SALEM AND CENTRAL GLOUCESTER COUNTIES...

At 546 PM EDT, a severe thunderstorm was located over Swedesboro, or
13 miles east of Wilmington, moving east at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Deptford, West Deptford, Glassboro, Pennsville, Woodbury, Pitman,
Clayton, Carneys Point, Paulsboro, Woodstown, Woodbury Heights,
Swedesboro, Beckett, Franklinville, Mullica Hill, Gibbstown,
Runnemede, Wenonah, and Oak Valley.

This includes the following highways...
 New Jersey Turnpike between exits 1 and 2.
 Interstate 295 in New Jersey between mile markers 4 and 20.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3979 7542 3982 7538 3985 7509 3961 7506
      3965 7548
TIME...MOT...LOC 2146Z 268DEG 19KT 3974 7528 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MJL

155 
WWUS51 KPHI 092158
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
558 PM EDT Thu Jul 9 2026

NJC015-033-092215-
/O.CON.KPHI.SV.W.0163.000000T0000Z-260709T2215Z/
Salem NJ-Gloucester NJ-
558 PM EDT Thu Jul 9 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHEASTERN SALEM AND CENTRAL GLOUCESTER COUNTIES...

At 558 PM EDT, a severe thunderstorm was located over Mullica Hill,
or 11 miles south of Gloucester City, moving east at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Glassboro, Pitman, Clayton, Woodstown, Swedesboro, Franklinville,
Mullica Hill, Turnersville, and Wenonah.

This includes New Jersey Turnpike near exit 2.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3973 7539 3981 7508 3961 7506 3964 7540
TIME...MOT...LOC 2158Z 268DEG 19KT 3974 7519 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MJL

846 
WWUS51 KPHI 092206
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
606 PM EDT Thu Jul 9 2026

NJC015-033-092216-
/O.EXP.KPHI.SV.W.0163.000000T0000Z-260709T2215Z/
Salem NJ-Gloucester NJ-
606 PM EDT Thu Jul 9 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SALEM AND CENTRAL
GLOUCESTER COUNTIES WILL EXPIRE AT 615 PM EDT...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However heavy rain
is still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southern New Jersey.

LAT...LON 3973 7539 3981 7508 3961 7506 3964 7540
TIME...MOT...LOC 2206Z 268DEG 19KT 3974 7514 

$$

MJL

Area Forecast Discussion
National Weather Service Mount Holly NJ
516 PM EDT Thu Jul 9 2026

.WHAT HAS CHANGED...
A Severe Thunderstorm Watch is now in effect for the eastern shores
of Maryland, Delaware, and southern New Jersey until 10 PM.

An increase in the potential for severe thunderstorms is possible
Friday afternoon into Friday evening (see Key Message 2).

&&

.KEY MESSAGES...
1) Showers and thunderstorms producing heavy rain and damaging wind
gusts will impact the region through this evening. Another round of
showers and thunderstorms will develop late Friday.

2) Additional rounds of showers and thunderstorms are expected on
Friday night into Saturday.

3) Drier and warmer conditions return by the end of the weekend into
next week.

&&

.DISCUSSION...
KEY MESSAGE 1...Showers and thunderstorms producing heavy rain and
damaging wind gusts will impact the region through this evening.
Another round of showers and thunderstorms will develop late Friday.

Low pressure will organize and develop over the Southern Appalachians
and Mid-Atlantic and will lift north over New Jersey and into the
Northeast tonight. A cold front approaches late Friday.

Abundant low level moisture is in place across the region with
surface dew points in the low to mid 70s, and dew points will creep
up by a few more degrees going into this evening. PWATs are in
excess of 2 inches across most of the region. As that low lifts
north towards the Northeast, some mid-level shortwave energy will
pass through the region as a mid-level trough passes through the
region. This will be the trigger for showers and thunderstorms to
continue to develop across the region. Showers and thunderstorms
producing heavy rain have developed already, and activity will
increase through the early evening hours. Training of thunderstorms
will be likely, and with rainfall rates of 1-2 inches per hour,
possibly as high as 3 inches per hour, will result in flash
flooding. A Flood Watch remains in effect for portions of southeast
Pennsylvania, including Philadelphia, northern Delaware, and most of
New Jersey until midnight.

Due to the high dew points, SBCAPE values range from 2000-2500 J/kg
with DCAPE values up to 500 J/kg. Thunderstorms that develop will be
capable of damaging wind gusts.

The Weather Prediction Center has a Slight Risk (2 out of 4) for
Excessive Rainfall for most of the area into tonight. The Storm
Prediction Center has a Slight Risk (2 out of 5) for the Delaware
Valley including Philadelphia, the eastern Shores of Maryland,
Delaware, and southern New Jersey and a Marginal Risk for (1 out of
5) from around I-195 north to I-78.

A Severe Thunderstorm Watch is now in effect for the eastern shores
of Maryland, Delaware, and southern New Jersey until 10 pm.

Activity tapers off from west to east, mostly ending by 10 pm for
all but southeast New Jersey, and storms will end there by midnight.
A warm and humid night on tap for the region with patchy fog
developing. Lows will be in the upper 60s to low 70s.

Humid conditions continue on Friday with dew points generally in the
mid 70s. With daytime temperatures in the upper 80s to low 90s, the
max heat index values will be in the upper 90s, possibly touching
100.

A cold front approaches Friday afternoon, touching off another round
of late day showers and thunderstorms, mainly over far western
portions of the forecast area (see Key Message 2 for more).

KEY MESSAGE 2...Additional rounds of showers and thunderstorms are
expected on Friday night into Saturday.

By Friday evening, convection is expected to be ongoing across the
area as showers and thunderstorms develop out ahead of a cold front
moving southward into the area. Similarly to Thursday, moisture is
anticipated to increase ahead of the front, where PWAT values are
progged to be in excess of 1.8 inches. This supports that any given
shower or storm will have the ability to produce heavy rainfall and
flash flooding. As of now, the majority of our forecast area is
highlighted in an MARGINAL risk (Level 1/4) for excessive rainfall.
Held off on expanding the Flood Watch into Friday night due to
uncertainty in where the heaviest rainfall will fall today.

In terms of the severe weather threat, ML CAPE is expected to reach
at least 1000 J/kg with bulk shear values around 30-35 kt. Given
better frontal forcing, there looks to be another opportunity for
severe weather. As of the 1730UTC/Day 2 update, SPC has upgraded the
majority of our area into a MARGINAL risk (Level 1/5) for severe
weather with the primary hazard being locally damaging winds.

For Saturday, there remains a bit of uncertainty with respect to
frontal progression through the area but guidance has trended a bit
wetter overall. We now have PoPs in the 20-50% range for area north
and west of the I-95 corridor, with PoPs in the 50-80% range for
areas southeast of I-95. Again, there remains a flash flood threat
on Saturday, primarily for the southern half of the area, which is
highlighted in a MARGINAL risk for excessive rainfall. Temperatures
will mainly be in the 80s.

KEY MESSAGE 3...Drier and warmer conditions return by the end of the
weekend into next week.

By Sunday and into early next week, guidance is showing an expansive
upper level ridge setting up over the northern High Plains. This
will yield dry weather and mainly sunny/clear skies across the
majority of the Mid-Atlantic region. Temperatures will be around
normal for Sunday, Monday and Tuesday, but will swing back above
normal for Wednesday and Thursday.

&&

.AVIATION /21Z THURSDAY THROUGH TUESDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Rest of today...SHRA/TSRA with MVFR/IFR conds, with ocnl VSBYs
as low as LIFR. SHRA/TSRA will taper off from west to east by
00Z. A general S to SW flow at 5 to 10 kt. High confidence
overall, low confidence on timing when any given storm will pass
over any given terminal.

Tonight...SHRA/TSRA will taper off at KMIV/KACY by 02Z. VFR,
becoming MVFR or lower by or after 06Z as BR develops. Light S
to nearly calm winds. Low confidence.

Friday...Primarily VFR. Another round of SHRA/TSRA will impact
the terminals in the late afternoon and at night. W winds 5 to
10 kt. Moderate confidence.

Outlook...

Friday night through Saturday...Prevailing VFR, however periods of
sub-VFR conditions are possible. A chance for showers and
thunderstorms which may cause locally gusty winds.

Saturday night through Tuesday...VFR. No significant weather
expected.

&&

.MARINE...
Sub-Small Craft Advisory conditions through Friday. Southwest winds
around 10 to 15 kt will turn west on Friday. Seas 2 to 3 feet.

Showers and thunderstorms through this evening will result in heavy
rain and potentially damaging wind gusts. VSBY restrictions in fog
possible late tonight and Friday morning. Another round of showers
and thunderstorms is possible late Friday afternoon.

Outlook...

Friday night through Saturday night...No marine headlines expected.
Winds generally between 5-15 kt with seas around 2-3 feet.

Sunday through Sunday night...SCA conditions possible. Winds
generally between 10-20 kt with seas up to 5 feet.

Monday through Tuesday...No marine headlines expected. Winds
generally between 10-20 kt with seas around 3-4 feet.

Rip Currents...

For Friday, winds turn southwesterly, and the swell weakens.
Thus, this should result in a LOW risk of rip currents for all
beaches.

For Saturday, winds turn northerly, and the swell remains weak.
Thus, this should result in a LOW risk of rip currents for all
beaches.

For specific beach forecasts, visit weather.gov/beach/phi

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flood Watch until midnight EDT tonight for PAZ060-070-071-
     101>106.
NJ...Flood Watch until midnight EDT tonight for NJZ009-010-012>022-
     025>027.
DE...Flood Watch until midnight EDT tonight for DEZ001.
MD...None.
MARINE...None.

&&

DISCUSSION...DeSilva/Hoeflich/MPS
AVIATION...DeSilva/MPS
MARINE...DeSilva/MPS/RCM

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
508 AM EDT Thu Jul 9 2026

MDZ012-015-019-020-100915-
Kent MD-Queen Annes-Talbot-Caroline-
508 AM EDT Thu Jul 9 2026

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Today and tonight.

Scattered showers and thunderstorms this afternoon could bring
damaging wind gusts and isolated flash flooding to portions of the
Eastern Shore of Maryland.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Hoeflich

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
457 PM EDT Thu Jul 9 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0333 PM     Flash Flood      1 NW Walt Whitman Bridg 39.92N 75.15W
07/09/2026                   Philadelphia       PA   Public

            Report from mPING: Street/road flooding;
            Street/road closed; Vehicles stranded.

&&

Staarmann

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
500 PM EDT Thu Jul 9 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0258 PM     Flash Flood      Ben Franklin Bridge     39.95N 75.14W
07/09/2026                   Philadelphia       PA   Public

            Report from mPING: Street/road flooding;
            Street/road closed; Vehicles stranded.

&&

Staarmann

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
501 PM EDT Thu Jul 9 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 PM     Flash Flood      Toughkenamon            39.84N 75.76W
07/09/2026                   Chester            PA   Public

            Sudden torrential downpour caused some roads
            to be flooded, New Garden Airfield (N57) had
            its runway slightly flooded, but enough to
            prevent any takeoffs or landings.

&&

Staarmann

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
502 PM EDT Thu Jul 9 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0353 PM     Flood            1 E Ellisburg           39.91N 74.99W
07/09/2026                   Camden             NJ   Public

            Report from mPING: River/Creek overflowing;
            Cropland/Yard/Basement Flooding.

&&

Staarmann

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
503 PM EDT Thu Jul 9 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0451 PM     Flash Flood      3 NNE Mount Laurel      39.97N 74.88W
07/09/2026                   Burlington         NJ   Dept of Highways

            Flooding on NJ 38 Westbound East of
            Larchmont Blvd (Mount Laurel Twp). 1 right
            lane of 3 lanes, right shoulder closed.

&&

Staarmann

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
527 PM EDT Thu Jul 9 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0520 PM     Flash Flood      1 SSW Ashland           39.79N 75.66W
07/09/2026                   New Castle         DE   Emergency Mngr

            Water rescue at Brackenville Road and
            Skyline Orchard Drive in Hockessin. Vehicle
            stuck in rapidly rising floodwater. Multiple
            roads impassible in the area.

&&

Staarmann