Severe Thunderstorm Watch
Means that conditions are favorable for thunderstorms that may produce wind gusts to 58 mph or stronger or hail to 3/4
inch or larger. These watches are issued for 1 to 12 hours at a time and often include several counties. Stay informed, watch the sky, and take cover if a severe thunderstorm approaches you.
Severe Thunderstorm Warning (Sirens Sound)
Means that radar or a trained spotter has detected a severe thunderstorm. Take cover if you are near the severe thunderstorm.
Means that conditions are favorable for tornadoes to develop. It is normally issued for several hours and may include several counties. If you are in or near the tornado watch area, stay informed via NOAA Weather Radio, commercial radio, or television. Keep your eye on the sky and be prepared to take cover at short notice. Tornadoes can occur with little or no warning.
Means that a tornado has been sighted or a developing tornado is reported by trained spotters or indicated on Doppler radar. A warning is typically issued by county and usually expires in about an hour. If a tornado warning is issued in your area TAKE COVER IMMEDIATELY! Because St. Croix County warns the entire county at once, it is possible for the weather to be severe near Hudson or Somerset, and not in Baldwin area, it may still be coming or moving a different sirection. The Warning gives you time to get in and tune in.
Flash Flood Watch
This is issued when a heavy rain may develop and result in flash flooding in or near the watch area.
Flash Flood Warning
Flash flooding in the warning area has developed or is imminent. If you’re in a low-lying area move to higher ground at once!
Urban and Small Stream Flood Advisory Local flooding of small streams, streets, or low lying areas such as railroad underpasses is occurring or is imminent.