Aside from an isolated shower or storm mainly South of I-88, we should stay dry into the evening. Temperatures will gradually fall to the low 70s, meeting the dew point under a calm wind. This could develop some areas of fog after midnight. Visibility could drop below a mile, especially near and Northwest of Rockford. Any fog should fade away by mid-morning tomorrow.
Temperatures will quickly rise near 90 degrees for Sunday's high temperature. That paired with dew points back in the low and mid-70s will push the heat index near 100° at times. Monday will be even hotter with low 90s temperatures and dew points pushing the upper 70s. Heat index Monday could reach near 105° at times, which may prompt another heat advisory. Slow improvements arrive by the middle of the week, with a much more pleasant air mass arriving after Wednesday.
The heat and humidity may also bring a risk for isolated thunderstorms. The daytime hours of Sunday and Monday look primarily dry, but storm chances may be present Sunday and Monday nights. There is still a lot of uncertainty of exact timing and placement of these complexes, but the support for a couple weakening complexes both nights.
The first one arrives after midnight Monday morning, with storms diving Southwest from Minnesota and Northern Wisconsin. Highest potential for severe weather is focused well to the North where there is better confidence on the strength of those storms, but a Level 1/5 Marginal risk for severe weather is in place for parts of the Stateline for Sunday night/Monday morning.
Another very similar complex of storms may develop across the Plains Monday evening and slide our direction overnight. These storms may be a bit delated from the night before, arriving after 2AM. But again, the focus will be on if the storms can maintain their strength into the night. A Level 1/5 Marginal risk for severe weather lies to our Northwest for Monday night/Tuesday morning.
No comments:
Post a Comment