Cool Friday – Weekend Warm-up ahead

Cool Canadian high pressure will settle over the Chicago area Friday. A northeast breeze will keep readings along the lake front in the 40’s while farther inland afternoon temperatures will reach into the lower or middle 50’s. Easterly flow will persist into the morning hours Saturday and then as winds become more southerly in the afternoon temperatures will peak in the middle 60’s- some 10 to 12 degrees warmer than Thursday.

Southwesterly flow will strengthen Saturday night and continue Easter Sunday. Despite increasing cloudiness, Sunday’s afternoon highs will reach the middle 70’s – the warmest readings so far this year. With the approach of a cold front from the west, showers and thunderstorms could spread into the Chicago area late in the day and continue Sunday night. Periodic showers and thunderstorms and mild temperatures will probably continue Monday before the cold front finally passes through our area Monday night.

ASK TOM WHY: How many past Good Fridays have experienced rain or snow?

Dear Tom,

How many past Good Fridays have experienced rain or snow?

— Michael K. Garrison,
Chicago

Dear Michael,

Good Fridays do show a bias toward precipitation. With the help of Chicago weather historian and climatologist Frank Wachowski, we checked the weather on 143 Good Fridays dating to 1871. Measurable precipitation has occurred in 73 years, or 51 percent of the days, at a time of the year when the daily climatological expectation for precipitation is about 40 percent. When traces of rain and snow are added to the mix, the percentage jumps to 64 percent as compared with an expectation of 56 percent. The last rain to fall on Good Friday was April 22, 2011, when more than half an inch soaked the city.

HUGE Spring Halo

Huge halos visible in the spring sky Wednesday over many sections of Florida caused quite a stir. Many of you sent me pictures.  I thought this shot from Adam Wlodarski, which so vividly shows the halo above the swimmers and others at the beach in Siesta Key, Florida illustrated just why the phenomenon caught the eyes of so many!!

This wider shot relayed to us from Adam Wlodarski in Siesta Key, Florida shows why this caught folks attention.  The halo dominated the sky. Photo courtesy of Adam Wlodarski, Siesta Key, Florida

Photo courtesy of Adam Wlodarski

Siesta Key, Florida