SWOP Weekly Weather Discussion

HEADLINE

A brief return to more summer-like conditions is expected by early next week...before cooler weather once again arrives later in the period.

DISCUSSION

The upper-level trough of low pressure anchored over the Great Lakes that has brought the recent stretch of cool weather will lift to the northeast and be replaced by a flat west-to-east zonal flow pattern across the U.S. this weekend into the first half of next week. This will bring a gradual increase in temperature and humidity...with highs climbing to more summer-like readings in the middle 80s from Monday, June 3rd through Wednesday, June 5th. A series of disturbances embedded within the zonal pattern will track through the Midwest over the next several days...resulting in rain chances both Saturday, June 1st and Monday, June 3rd. After that, medium range computer models are strongly suggesting the development of prominent upper ridging along and west of the Rockies by the middle and end of next week. As the ridge builds, downstream troughing will develop over the Great Lakes and Midwest, which will push a strong cold front into Illinois around Wednesday, June 5th. While it's still too early to pinpoint any specific details, this will be the next day to watch for potential severe weather. Once the front passes, another cool/dry airmass will arrive from Canada...sending temperatures back below normal by next weekend.

The latest 6-10 day outlooks (June 4-8) from the Climate Prediction Center (CPC) suggest ABOVE normal temperatures and NEAR normal precipitation across central Illinois.

Issued: 5/29/24