All of the forecasts did state low, but not zero, chance of tornadoes.

The problem is 99 percent of the time, they don't happen so people ignore it.

The technology doesn't exist to predict tornadoes accurately, which is why they have stuff like skywarn and boots on the ground reporting via the internet, which half of the time is someone thinking they are seeing something they aren't.

Storms that occur after dark are the worst for this because even spotters can only see stuff during lightning flashes.

So yeah, I don't blame people for being angry about it, but you can't exactly say it wasn't mentioned either. Any thunderstorm can spawn those, and when sirens get set off and there isn't one, they bitch because nothing actually happened, too. Either they set off sirens the moment a cloud even looks like it could spin or they try to find a level of rotation to do it to reduce false alarms, then something sneaks through because it didn't hit that threshold at first.

Can only do the best the technology and human interpretation can allow.

There were plenty of yellow indicators on radar as those storms came through, but yellow is weak rotation. Red is when radar picks something up that would likely spawn a warning, either that or a ground report. But radar isn't 100% the answer, and the technology has its weaknesses. But it can see in the dark much better than even a trained human, and a forecaster sitting at NWS Fort Worth has that and spotter/internet submitted information to work off of.

They will look into it, see if they missed something technology saw, but it'll probably be inconclusive. They can only work with the data they have.

And usually by the time it does show on radar, and they do hit the button to trigger the warning, it's already started as well. The ability to see 5 minutes into the future would help more than any technology, because they can spin up that quickly from what looks like nothing.