May Showers & Back To Back 70s
Our end of the week warm up will be wet at times. The heaviest rain will fall this evening and overnight. The latest GFS model run favors areas south of the city for the highest rainfall totals. Some spots could pick up in excess of 2 inches of rain. Most areas should see at least an inch of rain.
Some of thunderstorms today and especially tonight could be strong or even severe. The Storm Prediction Center has most of the area in the marginal risk for severe storms with areas south of the city in a slight risk area. Marginal risk means isolated severe storms are possible while slight risk means scattered severe storms possible. Large hail and damaging winds are the biggest threat late today and into early Friday morning. An isolated tornado can't be ruled out too.
After stormy periods today and into early Friday and then again Sunday into Monday, things should dry out for most of next week. Great timing as we enter Memorial day weekend. The latest GFS meteogram for O'Hare shows the stormy periods followed by several days that should feature quite a bit of sunshine.
Highs today will climb into the lower 70s. Friday should be another mild May day with highs again in the lower 70s for most but a bit cooler lakeside with highs there in the middle 60s. Cooler weather coming for this weekend and into early next week with highs generally in the 60s but even 50s for highs lakeside on Monday. The BIG WARM UP comes towards the end of next week.
70s will return by the Friday of Memorial Day weekend. The warmest weather of the year so far hits on that Sunday and Memorial day itself. The GFS model suggests lower to middle 80s for highs both days. Memorial Day weekend is shaping up to be the warmest weekend in nearly 9 months. The last time we had a weekend that warm was the middle of September.
The longer range forecasts have consistently shown a pattern switch to warmer weather for the middle and latter part of May. Both the 6-10 day and 8-14 day has us outlooked us for above average temperatures overall through the end of the month. It's a dramatic pattern compared to the cooler than average stretch we saw in April and through the first part of May.
Here is my 7 day forecast:
Today: Showers & t-storms (some strong), breezy & warmer High: 72
Friday: Sct. shower possible early then partly sunny Low: 60 High: 72 (66 Lakefront)
Saturday: Partly to mostly cloudy, pm sct. shwr/t-strms Low: 49 High: 67 (60 Lakefront)
Sunday: Mostly cloudy, sct. showers & t-storms Low: 56 High: 67 (57 Lakefront)
Monday: Partly to mostly cloudy, spotty shower possible Low: 48 High: 63 (58 Lakefront)
Tuesday: Mostly sunny Low: 48 High: 69 (63 Lakefront)
Wednesday: Mostly sunny Low: 52 High: 68 (62 Lakefront)