Severe Thunderstorm Warning 214, NWS Philadelphia/Mount Holly

960 
WWUS51 KPHI 212131
SVSPHI

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

DEC001-212145-
/O.CON.KPHI.SV.W.0214.000000T0000Z-260721T2145Z/
Kent DE-
531 PM EDT Tue Jul 21 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR CENTRAL KENT COUNTY...

At 531 PM EDT, a severe thunderstorm was located over Viola, or 10
miles south of Dover, moving east at 25 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...
Dover, Bowers, Woodside, Viola, Rising Sun-Lebanon, Rising Sun, Big
Stone Beach, Dover Base Housing, Felton, Frederica, Magnolia,
Riverview, and Woodside East.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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 3898 7570 3906 7566 3914 7540 3897 7530
TIME...MOT...LOC 2131Z 268DEG 24KT 3901 7555 

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

$$

Staarmann

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
1216 PM EDT Tue Jul 21 2026

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

1130 AM     Marine Tstm Wind 19 E Fenwick Island     38.46N 74.69W
07/21/2026  M47 MPH          ANZ485             DE   Buoy

            NDBC Buoy 44009 - DELAWARE BAY 26 NM
            Southeast of Cape May NJ gusted to 40.8 kt.

&&

DeSilva

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

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

0210 PM     Tornado          1 W Stanhope            40.90N 74.72W
07/21/2026                   Morris             NJ   Trained Spotter

            Trained spotter witnessed tornado touching
            down at the intersection of Interstate 80
            and US Route 206. Trees and debris on road.

&&

PF

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

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

0243 PM     Tornado          1 N Troy Hills          40.86N 74.39W
07/21/2026                   Morris             NJ   Trained Spotter

            Video sent in of a tornado on the ground
            sent from a driving range in Parsippany.
            Time estimated from radar.

&&

Hoeflich

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

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

0320 PM     Flash Flood      2 NNE Dover             40.91N 74.55W
07/21/2026                   Morris             NJ   Dept of Highways

            Exit 35 ramp closed on I-80 due to high
            water and flooded roadways.

&&

Hoeflich