National Weather Service United States Department of Commerce

Severe thunderstorms over southern Missouri will move into southeast Illinois after 3pm. Large hail and damaging winds will be possible with the strongest storms.
Showers and thunderstorms will move across the area today through tonight, as a cold front slowly moves across the area later. Locally heavy rainfall is likely as multiple storms through the period move over the same locations. The heaviest rainfall totals of 1.5 to 2.5 inches will occur between the Illinois river and I-57. Lesser amounts will be to the northwest and southeast of this area.
Severe Thunderstorm Watch until 7pm. Large hail and damaging winds possible.
A very moist storm system will move into the region late Friday and remain in the area through the weekend. Total rain from Friday evening through Sunday Night across the area is expected to generally range from 2 to over 4 inches across central and southeast Illinois with the highest amounts south of I-70. The heavy rain this weekend will likely fall on already saturated soil from the heavy rain expected to fall across the area through tonight. This will produce rapid runoff and a potential for localized flooding, as well as, river flooding across the region. Stay tuned to a reliable source of weather information as the weekend approaches and the potential for flooding becomes clearer.
There is a slight risk of severe weather across southeastern Illinois Friday afternoon through Friday night as thunderstorms develop along a warn front sitting across southern Illinois. The main threat will be damaging winds and hail. However, a brief tornado touchdown is possible. Locally heavy rainfall will also be possible in this area Friday night.