Storm Prediction Center Severe Thunderstorm Watch 220
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5 hours ago
Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended. Note: Click for Watch Status Reports.
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 220
NWS Storm Prediction Center Norman OK
550 PM EDT Sat May 3 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northern Delaware
Far northeastern Maryland
New Jersey
East central Pennsylvania
Coastal Waters
* Effective this Saturday afternoon and evening from 550 PM until
1100 PM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Scattered large hail events to 1.5 inches in diameter possible
SUMMARY...Scattered supercells will be possible through the evening
with large hail of 1-1.5 inches in diameter and isolated wind
damage. Some clustering of storms now in northern Maryland could
spread into the watch area later this evening.
The severe thunderstorm watch area is approximately along and 45
statute miles east and west of a line from 10 miles south of
Wilmington DE to 25 miles west northwest of Newark NJ. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU0).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 218...WW 219...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 450. Mean storm motion vector
25025.
...Thompson
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 220 SEVERE TSTM DE MD NJ PA CW 032150Z - 040300Z
AXIS..45 STATUTE MILES EAST AND WEST OF LINE..
10S ILG/WILMINGTON DE/ - 25WNW EWR/NEWARK NJ/
..AVIATION COORDS.. 40NM E/W /45NW SIE - 14SSW SAX/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 25025.
LAT...LON 39537643 40837547 40837375 39537475
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 220 Status Report Messages:
STATUS REPORT #3 ON WW 220
VALID 040120Z - 040240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 NNW EWR
TO 15 ESE PHL TO 40 W ILG.
..KERR..05/04/25
ATTN...WFO...PHI...
&&
STATUS REPORT FOR WS 220
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NJC019-021-023-027-035-041-040240-
NJ
. NEW JERSEY COUNTIES INCLUDED ARE
HUNTERDON MERCER MIDDLESEX
MORRIS SOMERSET WARREN
$$
PAC011-017-029-045-077-091-095-101-040240-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
BERKS BUCKS CHESTER
DELAWARE LEHIGH MONTGOMERY
NORTHAMPTON PHILADELPHIA
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 220
VALID 040020Z - 040140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..05/04/25
ATTN...WFO...PHI...
&&
STATUS REPORT FOR WS 220
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MDC029-040140-
MD
. MARYLAND COUNTIES INCLUDED ARE
KENT
$$
NJC005-007-015-019-021-023-025-027-029-033-035-041-040140-
NJ
. NEW JERSEY COUNTIES INCLUDED ARE
BURLINGTON CAMDEN GLOUCESTER
HUNTERDON MERCER MIDDLESEX
MONMOUTH MORRIS OCEAN
SALEM SOMERSET WARREN
$$
PAC011-017-029-045-077-091-095-101-040140-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
BERKS BUCKS CHESTER
DELAWARE LEHIGH MONTGOMERY
NORTHAMPTON PHILADELPHIA
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 220
VALID 032340Z - 040040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..05/03/25
ATTN...WFO...PHI...
&&
STATUS REPORT FOR WS 220
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DEC003-040040-
DE
. DELAWARE COUNTIES INCLUDED ARE
NEW CASTLE
$$
MDC029-040040-
MD
. MARYLAND COUNTIES INCLUDED ARE
KENT
$$
NJC001-005-007-011-015-019-021-023-025-027-029-033-035-041-
040040-
NJ
. NEW JERSEY COUNTIES INCLUDED ARE
ATLANTIC BURLINGTON CAMDEN
CUMBERLAND GLOUCESTER HUNTERDON
MERCER MIDDLESEX MONMOUTH
MORRIS OCEAN SALEM
SOMERSET WARREN
$$
PAC011-017-029-045-077-091-095-101-040040-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
BERKS BUCKS CHESTER
DELAWARE LEHIGH MONTGOMERY
NORTHAMPTON PHILADELPHIA
$$
ANZ430-040040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Probability of 1 or more strong (EF2-EF5) tornadoes
Low (<2%)
Wind
Probability of 10 or more severe wind events
Mod (40%)
Probability of 1 or more wind events > 65 knots
Low (20%)
Hail
Probability of 10 or more severe hail events
Mod (40%)
Probability of 1 or more hailstones > 2 inches
Low (20%)
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
High (70%)
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The “Low” category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
“Moderate” from 30% to 60%, and “High” from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
