Ethylene glycol can be diluted in a solution of 50 per cent water and 50 per cent coolant (or antifreeze!) to lower the freezing temperature of the fluid in your radiator by 60 genres or more. That's cold. But coolant isn't finished amazing you yet.
A severe thunderstorm warning, on the other hand, is not issued until such a storm has been physically observed or is spotted on radar. A tornado watch is issued when conditions may produce a tornado, and a warning is issued when a tornado has been sighted, or when rotation is seen on radar.
Warnings are issued by local weather service office based on what's actually happening on the ground and in the air. Watches are issued well in advance of storms and are longer lasting -- usually four to eight hours. Warnings are issued much closer to the time of the event, and generally last 30 minutes to an hour.