UPDATED at 4:30 PM
Tonight: Mostly cloudy with a 40% chance of showers/storms. Some severe weather is possible south of Waterloo this evening. Low: 61-67. Wind: S 5-15 mph.
Wednesday: Mostly cloudy with a 60% chance of showers/storms. High: 78-83. Wind: S 10-15 mph.
Wednesday Night: Mostly cloudy with a 50% chance of showers/storms. Low: 66-68. Wind: S 10-15 mph.
Thursday: Mostly cloudy with a 70% chance of showers/storms. High: upper 70s.
Friday: Partly cloudy with a 50% chance of showers/storms. High: low 70s.
Saturday: Partly cloudy with a 30% chance of showers/storms. High: mid 60s.
Sunday: Partly cloudy. High: mid 60s.
Monday: Mostly sunny. High: upper 60s.
Tuesday: Mostly sunny. High: low 70s.
Today has been mainly dry with areas of sunshine warming the temperatures this afternoon from 68 in the north to 81 in the south. The dewpoints are also much higher than the past few days with those readings in the 60s and low 70s . You probably noticed the increase in humidity. Most of eastern Iowa is south of the front where it is warmer and muggy. Here is the surface map this afternoon.
South of the warm front, across southern Iowa, the condition of the atmosphere is favorable for severe storms (large hail, wind and isolated tornadoes) therefore a TORNADO WATCH is in effect until 10 pm.
The storms this evening across southern Iowa could also produce very heavy rain. Heavy rain on saturated ground could cause flash flooding so a Flash Flood Watch is in effect tonight across southern Iowa.
After the storm chances tonight the next best chance of showers/storms will be Wednesday afternoon. Here is the forecast map for Wednesday evening.
Not only is there a chance for heavy rain tonight across southern Iowa, but heavy rain is possible with any of the rounds of storms forecast through Friday for all of Iowa. Here is the general rain forecast from the WPC from Tuesday evening to Friday evening.
In addition to the potential for heavy downpours there is a slight risk for severe storms as well through Thursday. Here severe weather outlook through Friday.
Finally this storm system will move east of the area Saturday as shower/storm chances taper off. High pressure will cool the temperatures a little and lower the humidity for a couple of days. The best part…a few days of dry weather in a row…Sunday through Tuesday.
Posted under Forecast Discussion
This post was written by Schnack on May 28, 2013