The National Weather Service in Chicago has issued a Heat Advisory in effect from Noon today till 8PM CDT this evening. With temperatures approaching record territory in the middle to upper 90’s, coupled with dew points in the upper 60’s, heat indices will be over 100 degrees during much of the afternoon hours. The heat advisory means that the hot temperatures and high humidity will create a situation where heat illnesses are possible if exposed to the oppressive conditions outdoors.
For the latest information, please check out the USAWx – Chicago page for the latest updates and forecasts regarding the heat and thunderstorm chances late tonight!
The hottest weather of 2013 is on the way for the Rockford metro area this afternoon. Current forecasts indicate a high of 95 or 96 degrees which is just below the record of 97 for the date. With dew points near 70, the index will make it feel more like 100 to 105 degrees during the peak heating hours of the afternoon. Our highest temperature this year so far in Rockford is 94 back on July 18th and we look to exceed that today.
Rockford’s high temperature hit 90 degrees yesterday, which marked the 8th time in 2013 that the mercury has reached or exceeded that hot weather benchmark. High’s were a little bit below what was forecast due to thunderstorm complexes riding along the edge of the hot dome of high pressure centered just off to our south and east. This pattern is known as the “ring of fire” pattern and as the surface high pressure retrogrades to the west, our winds will shift from the southwest to northeast as a backdoor cold front will move through the area very late tonight and tomorrow morning. With the passage of the front a 20 to 30 percent chance of storms will exist very late tonight and during the early morning hours of Wednesday. Just to the north and east of our area the Storm Prediction Center in Norman, OK has outlooked much of central and eastern Wisconsin in a slight risk of severe storms. The primary threat will be damaging winds and large hail.
Even though our winds will back to the northeast after the storms move through, our temperatures do not pull back much. Temperatures will remain above normal in the mid to upper 80s and a very “summer” feel to the air will still exist through Sunday. By Friday and over the weekend it looks like highs near or exceeding 90 degrees will be possible through Sunday before we pull back to normal temperatures just in time for Labor Day. Starting on Thursday night through Sunday a 20 to 30% chance of storms will exist in the afternoon and evening hours each day.
36 Hour Forecast:
This Evening: Hazy, Hot and Humid. Temperatures in the low 90s. Heat index values in the high 90s. Southwest wind 10 to 15 mph.
Tonight: A 20 chance of showers and thunderstorms late, mainly after 10pm and mainly north and east. Partly cloudy, temperatures in the lower 70s. Southwest winds 5 to 10 mph.
Tomorrow Morning: Clearing, showers and storms ending. Temperatures near 70. Winds becoming Northwest 5 to 10 mph.
Tomorrow Afternoon: Mostly sunny to partly cloudy. Warm and humid. Highs in the upper 80s. Heat index values in the low to mid 90s. Winds changing to the northeast 5 to 10 mph.
Tomorrow Night: Mostly clear, with a low in the middle to upper 60s. Light East northeast winds 5 to 10 mph.