Tonight: Mostly cloudy with an 80% chance of showers/storms. An isolated severe storm is possible. Low: 64-67. Wind: SW/NW 10-15 mph.
Thursday: Mostly cloudy, breezy and cooler with a 20% chance of showers. High: 72-76. Wind: NW 10-20 mph.
Thursday Night: Mostly clear and cooler. Low: 46-52. Wind: NW 5-10 mph.
Friday: Mostly sunny. High: low 70s.
Saturday: Partly cloudy. High: mid 70s.
Sunday: Partly cloudy. High: mid-upper 70s.
Monday: Partly cloudy. High: upper 70s.
Tuesday: Partly cloudy. High: low-mid 80s.
Wednesday: Partly cloudy. High: low-mid 80s.
International Space Station (ISS) viewing this evening will deal with the potential for clouds. Clouds will be increasing ahead of the cold front forecast to cross the area tonight. Here is the viewing information. The second flyby probably doesn’t look good at this point due to clouds. We will have a better chance to see it at 9:00…again cloud pending.
Time: 9:00 pm
Duration: 3 min
Path: NNW to NE
Time: 10:37 pm
Duration: 1 min
Path: NNW to NNE
Now let’s talk about the cold front and how it will impact us. The front is located to our northwest this afternoon. The map below shows the position of the front.
Clouds will increase this evening as showers and storms develop northwest of Iowa. We may have isolated showers/storms before 11 pm but the best chance will be after 11 pm or midnight. The way it looks right now…everyone will see showers/storms. The storms will be ending from NW to SE as we get close to sunrise.
The cold front will be in eastern Iowa Thursday morning and be located east of the Mississippi River by 1 PM…see map below.
The heaviest rain amounts will come as the front crosses the area tonight. Most locations are still forecast to get between 0.25-0.75” of rain. There will be some locations that will exceed 1” with storms. Here is the rain forecast from this evening to Thursday evening.
Click here for more details on each county. LINK!!!!!
Back to the forecast…The sky will remain mostly cloudy through Thursday with an isolated light shower possible at any time. It will be much cooler behind the front. The wind will be breezy from the NW until evening and from there it will diminish.
High pressure will move in from the northwest and clear the sky quickly during the evening hours. Surface high pressure will also keep our weather dry through the first half of next week.
The upper air pattern has a low pressure and trough over the east half of Canada and extends south into the United States. We are on the west side of the trough with a northwest flow. The result will be cooler than normal temperatures through the weekend. Notice the flow comes more from the west as Wednesday gets closer. Temperatures will slowly warm back to the 80s by Tuesday…maybe some locations as early as Monday.
This post was written by Schnack on August 15, 2012