Rockford received 1.39” of rain yesterday, ending a streak of 11 straight days that no measurable rain has fallen in Rockford, and the heaviest rain since 2.36” of rain received all the way back on June 22nd – Exactly two months ago! Heaviest totals from yesterday included 5” at Creston, in Ogle County.
The rain was very welcomed by area residents and farmers, but unfortunately this was the areas best chance at any significant rain for at least the next seven days as high pressure builds into the region under a dome of the season’s hottest air that will park over the area starting on Sunday and lasting much of next week. The U.S. Drought Monitor as of August 20th placed much of Northern and Central Illinois in the D0 – Abnormally Dry category. This rating will not improve much as no organized rains are forecasts through Thursday of next week.
Due to the rainfall yesterday, and saturated soils, the day opened foggy and the fog was so dense in some spots that visibilities were dropped to near zero and that prompted the National Weather Service in Chicago to hoist Dense Fog Advisories overnight that lasted until the mid-morning hours. Even though the sun angel is lower in the sky, the August sun quickly burned off the fog in most spots after 8AM.
Friday afternoon and Saturday look absolutely stellar with comfortable humidity, light winds, and average temperatures. The average high for this time of year is 82 degrees and our high on Friday should be right there under just about 100% clear skies. Saturday looks absolutely spectacular with 100% sunshine and warmer temperatures in the mid-80s and light winds.
The hottest and most prolonged heat wave of 2013 looms on the horizon. Starting on Sunday, especially in the afternoon, southerly winds will increase and boost temperatures to near, or exceeding 90 degrees in spots. Dew points will also be on the rise providing a very tropical feel to the air. Rockford and North Central Illinois could see temperatures in the low 90s and by Tuesday/Wednesday of next week even middle 90s! With dew points near 70 the heat index could reach or exceed 100 degrees in some spots during the hottest parts of the afternoon hours for much of next week.
With seven 90 degree days in Rockford on the books since June 1st, we could almost double that total before the close of next week. Our hottest temperature was 94 degrees back on July 18th and current forecasts indicate we could be at or exceed that temperature Tuesday or Wednesday of next week. With the heat and humidity only very isolated chances of rain exist next week affecting only 10 to 20 % of the area. The most organized storms will be well north of the area near the U.S. – Canadian border near the edge of the hot air dome – known as the Ring of Fire.
Friday Afternoon: Sunny, with a high near 82. East winds 10 mph.
Friday Night: Clear, cool, low in the middle to upper 50s. Winds becoming calm.
Saturday: Sunny, with a high near 85. Southeast winds 5 to 10 mph.
Saturday Night: Partly Cloudy, with a low near 63. South Southeast winds 5 to 10 mph.
Sunday: Mostly Sunny, very warm and becoming humid with a high of 90. South southwest winds 5 to 10 mph.
Sunday Night: Clear, warm, with a low near 70. Light southwest winds.