The National Weather Service’s Detroit office has begun issuing Snow Squall Warnings when necessary.

As an EAS event, this will only affect broadcasters who monitor the National Weather Service Radio originating from the Detroit office.  This includes stations in the EAS Southeast, East Central and Lenawee/Washtenaw regions.  NWS considers this to be a life threatening issue.

The EAS code that will be used is SVS. This will come from the NOAA Weather Radio SAME.  The NWS has never used an EAS code SVS up until now.  The text will have “Bulletin – EAS Activation Requested.”

As background, the Snow Squall Warning will be issued based on the following:

  1. Visibility 1/4 mile or less for 15 minutes or more.
  2. Sub-freezing ambient road temperatures (or plunging temperatures that would produce a flash freeze).
  3. Gusty winds.
  4. Forecaster judgement of impact, i.e. clear evidence that a snow squall could lead to dangerous conditions and a possible multi-car accident (pileup) when one of the above criterion isn’t quite met.

Anyone with questions regarding the NWS warnings should contact  Rich Pollman at (248) 625-3309 x726.

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