Public Information Statement
Issued by NWS San Diego, CA

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NOUS46 KSGX 061657

Public Information Statement
National Weather Service San Diego Ca
1000 AM PST Mon Mar 6 2017

...Impact Based Special Marine Warnings (SMW) and Marine
Weather Statements (MWS) Starting April 4, 2017...

Effective Tuesday April 4, 2017, Special Marine Warnings
(SMWs) issued by the National Weather Service in San Diego
(in addition to all other coastal NWS Weather Forecast
Offices in the Continental United States) will include
WATERSPOUT, HAIL, and/or WIND tags at the bottom of the
product, as well as additional descriptive Hazard, Source,
and Impact sections. This change also applies to Marine
Weather Statements (MWSs) that follow-up SMWs.

The waterspout, hail and wind tags are used to describe
the expected magnitude of each threat. The hazard, source
and impact sections are added to provide extra information
on the expected weather threats, the source that prompted
the warning, and the expected impacts to mariners

The tag line for each threat is at the bottom of the
product. The hail and wind tags are included regardless of
the magnitude, but if a waterspout is not possible or has
not been observed, then the waterspout tag is omitted.

Here is an example of the new format:

* At 1234 PM PDT, a severe thunderstorm producing
  waterspouts was located 34 nm east of North San Clemente
  Island, or 36 nm west of La Jolla, moving northeast at
  20 knots.

  HAZARD...Waterspouts, wind gusts 34 knots or greater, and
           large hail.


  IMPACT...Waterspouts can easily overturn boats and create
           locally hazardous seas. Small craft could be
           damaged in briefly higher winds and suddenly
           higher waves. Large hail could result in
           structural damage.

* The severe thunderstorm will remain over mainly open


Move to safe harbor until hazardous weather passes.


LAT...LON 3271 11799 3287 11810 3319 11753 3296 11737
TIME...MOT...LOC 1934Z 240DEG 20KT 3283 11797



If you have questions regarding this notice, please contact:

Alex Tardy
Warning Coordination Meteorologist
National Weather Service
Weather Forecast Office
San Diego, Ca


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