Springlike fluctuations this week

If skies cleared out, Chicagoans might have had a glimpse of the Aurora Borealis overnight caused by a giant solar geomagnetic storm over the weekend. It was classified as an extreme event which disrupted satellite operations and electrical systems. Scattered light frost may greet early risers in the suburbs this morning, and even with abundant sunshine, today will be the second straight day this week high temps may not warm out of the 50s. With low pressure approaching from the west, readings are expected to warm into the 70s Tuesday and Wednesday accompanied by potentially heavy rains later Wednesday. Northeast flow cools the area Thursday and Friday. In advance of the next cold front a warmup into the 80s appears in store for NE Illinois next weekend. However, if preliminary longer-range computer projections are correct, the last week in May could be a cold one for Chicagoans, with north winds tapping Canadian cold air much of the week.