bittercasting
An emotionally based negative weather forecast (from the perspective of the author) made by a weather enthusiast, or 'weather weenie', usually after having high hopes of extreme weather dampened due to unfavorable closer-to-event model runs, or the real time nowcast of a storm. Most often found on Weather forums online. Individuals residing in the Ohio Valley and Midwest are particularly vulnerable to such a condition, as these regions are often left out of large winter storms, and can often miss out on many severe weather events. See the so-called "Donut-Hole" effect.
It's one thing to be bummed out on missing a storm, but Jimmy's overly pessimistic rant added nothing to the discussion, and was tantamount to bittercasting.