JACKSON, Miss.--Severe weather and possibly even tornadoes are now included in the forecast for the bulk of Mississippi. It's part of a storm system that is expected to bring one to three inches of rain beginning Tuesday night. That forecast puts the severe weather risk on Wednesday and Thursday.

A briefing Monday evening by the National Weather Service sahoed the biggest risk for severe weather was from southwest Mississippi up. There is less of a risk in the northern quarter of the state.

In addition to severe weather, heavy rain is expected that could cause some localized flooding and some minor river flooding from already swollen rivers and creeks.

The system is part of a warm front that is rising from the Gulf that will kick things off. It will be met by a cold front Wednesday. That's expected to jump start the severe weather threat. Temps will be mild throughout.

The potential for heavy rain and severe weather is also responsible for the Weather Service putting a hold on a major upgrade to the Jackson Doppler radar.