# What is the meaning of -999 degrees Celsius?

I was checking the weather forecast just now, and it is showing that it "feels like -999 °C". I never heard or saw -999 °C before. I searched other weather channels, and they were showing that it feels like 2 °C. What is the meaning of -999 °C, irrespective of the weather?

• That means its cold. Really really cold. So cold that they really don't know how cold it actually feels. OR it just means that a programmer screwed up. – NotMe Dec 16 '14 at 0:24
• @ChrisLively Or there was missing data in one of the input fields to their "feels like" algorithm. It probably isnt a straight wind chill and may depend on more than just temp and wind. – casey Dec 16 '14 at 2:37
• Oh, the weather outside is frightful. – a CVn Dec 16 '14 at 14:25
• @casey: a programmer is still supposed to take those types of things into account... – NotMe Dec 16 '14 at 16:07
• This really sounds like a mistake to me! – L.B. Dec 18 '14 at 18:01

• Stupid languages that don't have an NA numeric value >:/ – naught101 Jan 12 '15 at 3:28