Severe Thunderstorm Warning 219, NWS Philadelphia/Mount Holly

026 
WWUS51 KPHI 212222
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
622 PM EDT Tue Jul 21 2026

MDC035-212232-
/O.CAN.KPHI.SV.W.0219.000000T0000Z-260721T2245Z/
Queen Anne's MD-
622 PM EDT Tue Jul 21 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN QUEEN ANNE'S
COUNTY IS CANCELLED...

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

A Tornado Watch remains in effect until 900 PM EDT for northern
Delaware.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central Delaware...and northeastern Maryland.

LAT...LON 3931 7611 3937 7599 3936 7598 3937 7595
      3936 7588 3938 7582 3938 7577 3946 7577
      3953 7560 3923 7535 3925 7576 3924 7581
      3926 7585 3925 7591
TIME...MOT...LOC 2222Z 241DEG 33KT 3938 7564 

$$

DEC001-003-MDC029-212245-
/O.CON.KPHI.SV.W.0219.000000T0000Z-260721T2245Z/
New Castle DE-Kent DE-Kent MD-
622 PM EDT Tue Jul 21 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR SOUTHWESTERN NEW CASTLE...NORTHERN KENT AND NORTHEASTERN KENT
COUNTIES...

At 622 PM EDT, a severe thunderstorm was located near Green Spring,
or near Middletown, moving northeast at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Middletown, Smyrna, Clayton, Millington, Sassafras, Woodland Beach,
Green Spring, Delaney Corner, Massey, Kennedyville, Townsend, Galena,
Odessa, Leipsic, and Chambersville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM EDT for northern
Delaware.

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 3931 7611 3937 7599 3936 7598 3937 7595
      3936 7588 3938 7582 3938 7577 3946 7577
      3953 7560 3923 7535 3925 7576 3924 7581
      3926 7585 3925 7591
TIME...MOT...LOC 2222Z 241DEG 33KT 3938 7564 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

851 
WWUS51 KPHI 212239
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
639 PM EDT Tue Jul 21 2026

DEC001-003-MDC029-212249-
/O.EXP.KPHI.SV.W.0219.000000T0000Z-260721T2245Z/
New Castle DE-Kent DE-Kent MD-
639 PM EDT Tue Jul 21 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NEW CASTLE...
NORTHERN KENT AND NORTHEASTERN KENT COUNTIES WILL EXPIRE AT 645 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.

A Tornado Watch remains in effect until 900 PM EDT for northern
Delaware.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central Delaware...and northeastern Maryland.

LAT...LON 3931 7611 3937 7599 3936 7598 3937 7595
      3936 7588 3938 7582 3938 7577 3946 7577
      3953 7560 3923 7535 3925 7576 3924 7581
      3926 7585 3925 7591
TIME...MOT...LOC 2239Z 247DEG 31KT 3943 7549 

$$

AKL

Area Forecast Discussion
National Weather Service Mount Holly NJ
416 PM EDT Tue Jul 21 2026

.WHAT HAS CHANGED...
A Tornado Watch has been issued until 9PM tonight.
A Severe Thunderstorm Watch has been issued until 10PM tonight.

&&

.KEY MESSAGES...
1. There continues to be an elevated risk for severe thunderstorms
and flash flooding today and Wednesday, with the greater risk
through this evening.

&&

.DISCUSSION...
KEY MESSAGE 1...There continues to be an elevated risk for severe
thunderstorms and flash flooding today and Wednesday, with the
greater risk through this evening.

A Tornado Watch has been issued until 9PM tonight for New
Jersey, eastern PA, and northern Delaware.

A Severe Thunderstorm Watch has been issued until 10PM tonight
for the central and southern Delmarva.

Severe thunderstorms continue to pop off across the region this
afternoon and are expected to become more widespread through the
evening. Several moving parts are coinciding to develop a
widespread severe and flash flooding threat. On the mesoscale,
an MCS that developed across the Ohio River Valley earlier this
morning has collided with a warm front that has draped across
the NJ/NY border. This MCS has already resulted in several
tornado warnings across northern NJ and into portions of
southern NY and northeast PA. This threat looks to persist for
at least the next few hours. On the synoptic scale, an upper-
level trough continues to provide strong mid to upper level flow
across the Mid Atlantic, resulting in widespread convective
development. In the near-term, the convection has begun to
concentrate itself along a pre-frontal trough across central and
eastern PA this afternoon. Storms have shown severe potential
cross this region and have also begun to congeal and train,
increasing the flash flood threat. Another round of storms may
pivot from central PA/MD border down into the Delmarva tonight
as well. Storm evolution has already become rather chaotic this
afternoon and is expected to become more disorderly through the
evening before the cold front arrives from the west and pushes
all the convection towards the coast by midnight or so. Any of
these storms have the potential to also produce rainfall rates
of 1-3 inches per hour at times. Overall rainfall amounts will
be a widespread 1-3 inches with locally higher amounts. Damaging
wind gusts, flash flooding, a few tornadoes, and hail are all
possible through tonight.

During the overnight hours, convection may persist mainly across
the southern Delmarva as the frontal boundary stalls across the
region. The flash flood guidance for this region is not as
sensitive to excessive rainfall, but will still bear monitoring
through the early morning hours.

On Wednesday, the cold front will sag farther south and east and
depending on how quickly this clears our area there will be some
showers and thunderstorms, especially as additional shortwaves move
through the flow within the upper-level trough overhead. This looks
to be more concentrated across southern New Jersey to Delmarva but
could extend into the I-95 corridor for a time. There is some severe
weather risk mainly near and south/east of the I-95 corridor with
locally damaging wind gusts the main threat. The greater instability
and shear looks to reside across Delmarva on southward, where a
little higher severe thunderstorm risk is indicated. Some locally
excessive rainfall is possible with some local flash flood risk,
however this looks to be less compared to today given the shift
farther south and more into the coastal plain. Once the front moves
away by later Wednesday, it turns drier for Thursday/Friday and
right into the weekend.

&&

.AVIATION /19Z TUESDAY THROUGH SUNDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Through 04Z...Prevailing VFR ceilings. However, expecting
increasing coverage of showers and thunderstorms after 18z from
west to east with MVFR/IFR conditions at times. The most
widespread coverage is expected between 20 and 02Z from West to
East. Locally strong and variable winds probable with stronger
thunderstorms. Otherwise, southwest winds 10-15 knots. Moderate
confidence.

After 04Z through 12Z...Once storms clear out, prevailing MVFR
ceilings likely, localized IFR conditions possible. South to
southwest winds 10 knots or less. Low confidence.

Wednesday...Once morning clouds clear by 15Z, should have
prevailing VFR conditions. However, temporary MVFR or even IFR
conditions will be possible with showers and storms. The highest
risk of showers and storms is at KACY, but it is possible the
storms will be south of all TAF sites. Southwest winds around 10
KT.

Outlook...

Thursday through Saturday...VFR.

&&

.MARINE...
Small Craft Advisory conditions for all coastal waters through
Wednesday evening. SCA conditions do subside though overnight
on Delaware Bay. Gusty thunderstorms probable mainly this
evening and into tonight.

Outlook...

Wednesday...Small Craft Advisory remains in effect for the ocean
zones.

Thursday through Saturday...The conditions are anticipated to be
below Small Craft Advisory criteria.

Rip Currents...

For the rest of today, southerly winds of 15-25 mph with either a
shore parallel or slight onshore flow expected depending on
location. Breaking waves of 2-4 feet will result in more energy
within the surf zone. As a result, maintained a MODERATE risk for
the development of dangerous rip currents at all beaches.

For Wednesday, winds turn more southwesterly but still 10-20 mph.
However, breaking wave heights are expected to increase, with
breaking waves in the surf zone as high as 5 feet possible. Still a
7 second period though which will mitigate the rip current threat
some. However, will continue with a MODERATE risk for the
development of dangerous rip currents at all beaches.

For Thursday, winds come around to the northeast and will generally
be 15 to 20 mph. Breaking waves are expected to be around 2-4 feet
with a 7 second period. With the onshore component of the wind and
multiple swell groups expected, expecting a MODERATE risk for the
development of dangerous rip currents at all beaches.

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

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flood Watch until 2 AM EDT Wednesday for PAZ070-071-101>106.
NJ...Flood Watch until 2 AM EDT Wednesday for NJZ008>010-012>015-
     017>019.
DE...Flood Watch until 2 AM EDT Wednesday for DEZ001.
MD...None.
MARINE...Small Craft Advisory until 6 AM EDT Wednesday for ANZ430-431.
     Small Craft Advisory until 2 AM EDT Thursday for ANZ450>455.

&&

DISCUSSION...Gorse/MJL
AVIATION...Gorse/Johnson
MARINE...Gorse/Hoeflich/MJL

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
429 AM EDT Tue Jul 21 2026

MDZ012-015-019-020-220900-
Kent MD-Queen Annes-Talbot-Caroline-
429 AM EDT Tue Jul 21 2026

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Today and tonight.

Severe thunderstorms with damaging winds and hail are possible this
afternoon and evening. Localized flash flooding is possible this
afternoon and tonight.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Some severe thunderstorms with damaging winds are possible Wednesday.
Localized flash flooding is possible on Wednesday.

.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
537 PM EDT Tue Jul 21 2026

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

0500 PM     Flash Flood      Morris Plains           40.83N 74.48W
07/21/2026                   Morris             NJ   911 Call Center

            Stranded vehicle in flooded roadway near
            Morris Plains train station.

&&

MJL

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
538 PM EDT Tue Jul 21 2026

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

0535 PM     Flash Flood      1 SE New Castle County  39.67N 75.60W
07/21/2026                   New Castle         DE   Emergency Mngr

            Vehicles stuck in flood waters along DuPont
            Highway.

&&

ZC

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
540 PM EDT Tue Jul 21 2026

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

0536 PM     Flash Flood      White Clay Creek        39.73N 75.73W
07/21/2026                   New Castle         DE   Emergency Mngr

            Water rescues reported on Paper Mill and
            Creek View Rd.

&&

ZC

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
541 PM EDT Tue Jul 21 2026

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

0529 PM     Tstm Wnd Dmg     1 SSW Mount Laurel      39.92N 74.90W
07/21/2026                   Burlington         NJ   Fire Dept/Rescue

            Wires down along Church Road in Mount
            Laurel. Time estimated from radar.

&&

Hoeflich

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
546 PM EDT Tue Jul 21 2026

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

0513 PM     Tstm Wnd Dmg     Maple Shade             39.96N 75.00W
07/21/2026                   Burlington         NJ   Trained Spotter

            Tree down. Time estimated from radar.

&&

ZC

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
557 PM EDT Tue Jul 21 2026

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

0513 PM     Tstm Wnd Dmg     Maple Shade             39.96N 75.00W
07/21/2026                   Burlington         NJ   Dept of Highways

            Downed Tree on NJ 41 Southbound Ramp To NJ
            38 (Maple Shade Twp), ramp lane closed. Time
            of damage estimated from radar.

&&

ZC