Weather Underground Forecast for Thursday, April 18, 2013. A major storm will continue moving through the eastern half of the country on Thursday, bringing a variety of weather conditions to a wide swatch of the country. The most urgent of these weather conditions will be from the possibility of severe thunderstorms throughout the Mississippi Valley from Louisiana through Michigan. The Storm Prediction Center has issued a moderate risk for severe weather for a part of the Mississippi Valley from Arkansas through Illinois, Indiana, and southern Michigan. This means that there is a significant chance of very strong thunderstorms to produce strong winds, large hail, and even tornadoes. A slight risk of severe weather extends farther to the west and east of the moderate risk region. Residents throughout the Mississippi Valley should monitor the progress of local weather conditions throughout the day, and be prepared to take any precaution to protect life and property due to severe weather.
Meanwhile, the second part of the storm will bring Winter weather to parts of the Northern Plains and Midwest. Winter Storm Warnings are posted from Nebraska through northern Wisconsin in anticipation of several inches of new snow. Up to a foot of Spring snow will be possible for some areas, allowing the cold and wet April to continue for this area.
The eastern third of the country east of the Mississippi Valley will see temperatures in the 70s and 80s (and possible some 90s), while the Central and Northern Plains will rise into the 20s, 30s, and 40s. The Southwest will rise into the 50s, 60s, and 70s.
Temperatures in the Lower 48 states Wednesday have ranged from a morning low of -2 degrees at Yellowstone, Wyo. to a high of 95 degrees at Dryden, Texas