U.S. Severe Weather Forecast (Convective Outlook)

Day Three

acus03 kwns 230730 
Storm Prediction Center ac 230729 

Day 3 convective outlook 
National Weather Service Storm Prediction Center Norman OK 
0229 am CDT Sat Jun 23 2018 

Valid 251200z - 261200z 

..there is a slight risk of severe thunderstorms from Iowa into 
eastern Kansas... 

A few severe storms are possible mainly across Iowa, Missouri, and 
eastern Kansas. 

..synopsis and discussion... 
An upper low with a 50-60 kt midlevel speed Max will move slowly 
northeastward across the northern plains, with an attendant weak 
surface low. A warm front will lift northward to a central Iowa to 
northern Kentucky line by 00z, with a very moist air mass to the south. 
Meanwhile, a front will extend southwestward from the low across 
eastern NE and Kansas. Substantial early day precipitation is expected 
across much of the warm sector, and marginally severe wind or hail 
is possible. Diurnally driven storms are also expected, and precise 
locales of redevelopment will favor both the synoptic boundaries as 
well as residual outflow. A few strong storms are also possible 
extending into part of the Ohio and Tennessee valleys, where moderate 
instability will develop beneath weak northwesterly flow aloft. 

.Jewell.. 06/23/2018