Weekend rains expected to make up April deficit
Basketball fans have become used to the Chicago Bulls last-minute comebacks, and for now it has carried over to weather as well. Heavy rainfall last night and today is expected to make up for an April deficit that as of Friday had grown to over an inch.
Occasional downpours may well push this storm’s metro area average rainfall totals well over an inch, and by midnight tonight boost the official O’Hare April total rainfall in excess of the normal 3.68". Unattached from the primary polar jet stream far to the north and steered by weak westerly winds aloft, a low pressure system will slowly drift through the western Great Lakes and Ohio Valley the next few days allowing May 2006 to start off on a cloudy cool and damp note.
The polar jet is expected to migrate south, absorb the weakening Great Lakes low pressure system, and reconnect with the upper air wind pattern over the U.S. by next weekend—leading to a touch of Canada cold Saturday.
-Paul Dailey WGNTV Meteorologist