To snow or not to snow, that is the question

The weather service has issued a severe storm watch for tomorrow. In this part of New York they've been wrong the last two times they predicted large snowfall accumulations, so there's a certain amount of skepticism.

Apparently sensing this, the warning from the NWS includes the text:

LOW PRESSURE... RESPONSIBLE FOR THE POTENTIAL SNOWSTORM... HAS ALREADY PRODUCED SNOWFALL IN LAS VEGAS.

Or, in plain English: LOOK DUMMIES, IT FREAKING SNOWED IN LAS VEGAS. YOU GUYS IN THE TRADITIONAL SNOWBELT ARE JUST DOOMED!