Storm Prediction Center Severe Thunderstorm Watch 277

Note: 
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for Watch Status Reports.

   SEL7

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 277
   NWS Storm Prediction Center Norman OK
   1235 PM EDT Sat May 17 2025

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Western New Hampshire
     Central and Northern New York
     Vermont
     Lake Ontario

   * Effective this Saturday afternoon and evening from 1235 PM
     until 800 PM EDT.

   * Primary threats include...
     Scattered damaging wind gusts to 65 mph possible
     Scattered large hail events to 1.5 inches in diameter possible
     A tornado or two possible

   SUMMARY...Scattered strong to severe thunderstorms will increase in
   coverage through the afternoon.  Locally damaging winds are the main
   concern, but the strongest cells could also produce large hail and
   perhaps a tornado.

   The severe thunderstorm watch area is approximately along and 75
   statute miles north and south of a line from 30 miles east southeast
   of Montpelier VT to 5 miles south of Rochester NY. For a complete
   depiction of the watch see the associated watch outline update
   (WOUS64 KWNS WOU7).

   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.

   &&

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   1.5 inches. Extreme turbulence and surface wind gusts to 55 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   26030.

   ...Hart

   SEL7

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 277
   NWS Storm Prediction Center Norman OK
   1235 PM EDT Sat May 17 2025

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Western New Hampshire
     Central and Northern New York
     Vermont
     Lake Ontario

   * Effective this Saturday afternoon and evening from 1235 PM
     until 800 PM EDT.

   * Primary threats include...
     Scattered damaging wind gusts to 65 mph possible
     Scattered large hail events to 1.5 inches in diameter possible
     A tornado or two possible

   SUMMARY...Scattered strong to severe thunderstorms will increase in
   coverage through the afternoon.  Locally damaging winds are the main
   concern, but the strongest cells could also produce large hail and
   perhaps a tornado.

   The severe thunderstorm watch area is approximately along and 75
   statute miles north and south of a line from 30 miles east southeast
   of Montpelier VT to 5 miles south of Rochester NY. For a complete
   depiction of the watch see the associated watch outline update
   (WOUS64 KWNS WOU7).

   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.

   &&

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   1.5 inches. Extreme turbulence and surface wind gusts to 55 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   26030.

   ...Hart

Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.

   SAW7 
   WW 277 SEVERE TSTM NH NY VT LO 171635Z - 180000Z
   AXIS..75 STATUTE MILES NORTH AND SOUTH OF LINE..
   30ESE MPV/MONTPELIER VT/ - 5S ROC/ROCHESTER NY/
   ..AVIATION COORDS.. 65NM N/S /27ESE MPV - 44E BUF/
   HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..55 KNOTS.
   MAX TOPS TO 500. MEAN STORM MOTION VECTOR 26030.

   LAT...LON 42957200 41967767 44137767 45127200

   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU7.

Watch 277 Status Report Message has not been issued yet.

Note:
 Click for Complete Product Text.

Tornadoes

Wind

Hail

Combined Severe Hail/Wind

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.