All of Iowa, Flooding, Severe Weather

Iowa Forecast Video 6/16/2011

[youtube http://www.youtube.com/watch?v=zVeQwOtGah0&hl=en&fs=1]

MORE RAIN!:Most of the day will remain dry, but alas that cannot last, especially with the repetitive pattern we’re stuck in. Another storm system is on the way bringing with it, chances of showers and thunderstorms. With those come the chance of severe weather as well. The Storm Prediction Center has outlooked the southwestern sections of the state under a slight risk for later today and tonight. The main threats will be from large hail and damaging winds. These storms will congeal into another MCS during the overnight hours into Friday morning producing yet more heavy rain across the southern counties, where rivers and streams are already running bankfull or over flood stage at this time. It will all depend on where the storms develop later this afternoon into tonight with regards to where the MCS will likely move through. It’s a waiting game.

DRY WEEKEND: The weekend will be about 80-90% dry across the state. Outside of some early showers and storms Saturday morning, there will be plenty of dry time before another batch returns late on Sunday. Temperatures this weekend will be more summerlike than the past few days, with highs likely in the 80s to lower 90s with dewpoints in the 60s.

HEAT BUILDING: The heat ridge looks to set up once again by the end of the month and begin retrograding to the desert southwest, that will put the state in a northwesterly flow aloft. This will bring some cooler air in, but also will bring some storm systems in from Canada, which could trigger more showers and storms. Of course out this far, you have to take lightly as this will likely change quite often over the next several runs.

FLOODING: Rivers continue above flood stage across the Missouri River, the Des Moines River from Ottumwa on downstream, the Big and Little Sioux Rivers in NW Iowa and several others. The Missouri River flooding will be ongoing for several more weeks if not the rest of June and July depending on precipitation and releases from upstream reservoirs. Other rivers should fall below flood stage by this weekend but this doesn’t take into account anymore precipitation this weekend, so these forecasts will likely change.