Mother Nature's struggle between seasons sometimes results in a clash of air masses that can create conditions favorable for severe weather. That's the possible scenario for this evening and tonight across central Minnesota.

After a sunny and warm day with highs around 80, showers and thunderstorms will become likely across the area this evening and tonight. There's a marginal risk fo some of those storms becoming severe, with the primary threats being large hail and damaging winds.

National Weather Service
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Beyond tonight's risk of severe storms, there will be on and off chances for soaking rain this week. Beginning tonight through next weekend, there's at least some chance for rain, with Wednesday looking like it has the best chance for being a soaker. The latest forecast models have Central Minnesota receiving at least a half-inch of rain.

The National Weather Service adds:

Models have continued to paint the picture of a long duration rainfall event over the area late Tuesday through Thursday. Potential for a half inch or greater is looking like a good possibility, with some model solutions showing even more.

This is the time of year when a little refresher on severe weather makes sense in Minnesota. August was a LONG time ago.

Watches

Are issued when conditions are favorable for tornadoes, severe thunderstorms or flash floods. If you are in a watch area, continue with normal activities but also make plans to seek shelter if necessary.

Warnings

Are issued when severe weather has been reported or is imminent. Seek shelter immediately if you are in or near the path of the storm. Warnings are issued by county and city names. Make sure you know the name of the county in which you live and the cities that surround you.

Advance Information

The forecast and warning process begins one or more days ahead of time, when the threat area is determined. Hazardous weather outlooks are issued early every morning, and updated as conditions warrant.

If a Watch is Issued

Local weather offices are staffed with extra personnel. State officials are notified and they pass the information to the county and local level. Counties and cities activate their spotter groups as the threat increases. TV and radio stations pass the word to the public.

National Weather Service

If a Warning is Issued

Warnings are disseminated swiftly in a multitude of ways, including TV, radio, and over the internet. Advances in technology have allowed people to receive warnings via cell phone, pager, and numerous other methods. Spotters provide important reports on the storm, and emergency officials carry out the plans that the emergency managers have developed. Updates are issued frequently until the immediate threat has ended.

Sirens

Counties and cities own the sirens and therefore decide how and when to activate them.  The National Weather Service does not sound them. There are many different policies by counties and cities. Some will activate them across the entire county for a tornado warning only. Others will activate sirens countywide for tornado warnings and all severe thunderstorm warnings. Some will activate sirens across the entire county for tornado warnings and severe thunderstorms that have winds of at least 70 or 75 mph.  Others will activate sirens only for portions of counties. Also, local officials may sound the sirens anytime they believe severe weather is a threat, even if there is no warning from the National Weather Service.

Sirens normally sound about 3 minutes and then go silent. It is very rare to keep the sirens sounding for the entire warning, since that will cause the backup battery to run out, which would be critical in the event power goes out. Furthermore, the siren motor will fail much more quickly if the siren sounds continuously. Some jurisdictions may repeat siren activation every few minutes.  There is no such thing as an "All Clear" for storms.

Radio & TV

Media outlets receive the warning information and disseminate it to you, often by interrupting programming. 98.1 (WWJO) Minnesota's New Country will provide the latest live severe weather watches & warnings all year long.

NOAA Weather Radio

The tone alert feature of NOAA Weather Radio will activate specially built receivers, sounding an alarm to alert you to the danger.  It sounds its alert anytime the National Weather Service issues a warning, even in the middle of the night. Make sure you have a NOAA Weather Radio, as you can not always depend on sirens, phone calls or seeing the warnings on television.

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