From the Twitter page of the NWS Nasville Forecast Office

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Overheard at the weather office...
Forecaster A: We can't put snow in the forecast. We just can't.
Forecaster B: Some of the models are putting in actual snowfall amounts.
Forecaster A: So let's just take the worst case and best case, average
them together, then set all resulting positive integers to zero.
Forecaster B: Sounds good. I really don't want to get everyone stirred
up just yet. We'll punt to the next shift.
Narrator: Two hours later, they put snow in the forecast.
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Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.
https://peakdistrictweather.org
Twitter: @TideswellWeathr