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