Source: US National Oceanic and Atmospheric Administration
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 260
NWS Storm Prediction Center Norman OK
1005 AM EDT Fri May 16 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Delaware
Far Eastern Maryland
New Jersey
Far Eastern Pennsylvania
Coastal Waters
* Effective this Friday morning and afternoon from 1005 AM until
500 PM EDT.
* Primary threats include…
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY…Thunderstorms continue to strengthen as they move into
more of eastern PA and eastern MD. Destabilization is expected
downstream, with the resulting combination of instability and shear
supportive of supercells capable of large hail and damaging gusts.
The severe thunderstorm watch area is approximately along and 55
statute miles east and west of a line from 15 miles northwest of
Trenton NJ to 45 miles south of Dover DE. 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 259…
AVIATION…A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
27035.
…Mosier
SEL0
URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 260
NWS Storm Prediction Center Norman OK
1005 AM EDT Fri May 16 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Delaware
Far Eastern Maryland
New Jersey
Far Eastern Pennsylvania
Coastal Waters
* Effective this Friday morning and afternoon from 1005 AM until
500 PM EDT.
* Primary threats include…
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY…Thunderstorms continue to strengthen as they move into
more of eastern PA and eastern MD. Destabilization is expected
downstream, with the resulting combination of instability and shear
supportive of supercells capable of large hail and damaging gusts.
The severe thunderstorm watch area is approximately along and 55
statute miles east and west of a line from 15 miles northwest of
Trenton NJ to 45 miles south of Dover DE. 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 259…
AVIATION…A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
27035.
…Mosier
Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW0
WW 260 SEVERE TSTM DE MD NJ PA CW 161405Z – 162100Z
AXIS..55 STATUTE MILES EAST AND WEST OF LINE..
15NW TTN/TRENTON NJ/ – 45S DOV/DOVER DE/
..AVIATION COORDS.. 50NM E/W /32ESE ETX – 8NNE SBY/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27035.
LAT…LON 40437397 38477444 38477649 40437606
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 260 Status Report Message has not been issued yet.
Note: Click for Complete Product Text.Tornadoes
Probability of 2 or more tornadoes
Low (10%)
Probability of 1 or more strong (EF2-EF5) tornadoes
Low ( 65 knots
Low (20%)
Hail
Probability of 10 or more severe hail events
Mod (40%)
Probability of 1 or more hailstones > 2 inches
Mod (30%)
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.