Storm nearing Belvidere will continued to be monitored as it has shown some very weak rotation. As of right now there are no warnings but remain alert if you're in Belvidere, Capron and Poplar Grove
5:40pm Update: The tornado warning for Ogle County has been allowed to expire. Still look for the line of storms from Machesney Park to Stillman Valley to continue to produce gusty winds, possible funnel clouds, heavy rainfall and frequent lightning. The type of environment present late this afternoon and evening was not supportive of large, long lived tornadoes due to the lack of instability within the atmosphere to help sustain storms when they form. However, the increased shear in the atmosphere can allow for a brief strengthening of storms and those can produce weak, spin-up tornadoes. It's important for you to remain alert and take every warning seriously! If you have any damage please report it to: weather@wtvo.com -CK Storm is nearing Byron...if you live in Byron you should take cover now. Tornado Warning remains in effect until 5:30pm. The storm has shown signs of weakening within the past 10 minutes but signs of rotation remain present.
5:00pm Update: Tornado Warning for Ogle county until 5:30pm. A severe thunderstorm was located near Polo, just to the east, and moving northeast around 45mph. This storm has shown signs of weak rotation and is capable of producing a very weak spin up tornado. If you are near Oregon, Mt. Morris or Byron you need to take shelter immediately.
4:50pm Update: A line of strong thunderstorms have developed near Forreston to just southwest of Polo moving northeast at 55 mph. Winds near 50 mph, heavy rainfall and frequent lightning can be expected with these storms. Areas affected are: Polo, Forreston, Dixon, Oregon, Stillman Valley and Byron.
4:25pm Update: Radar activity late this afternoon continues to show scattered showers trying to develop west and southwest of Freeport and further south across Whiteside counties. As of right now there have been no lightning strikes detected with these cells indicating just rain at the moment.
3:15pm: The temperature rose to 69° in Rockford this afternoon. This breaks the daily record high but also, as previously mentioned, the all-time record high for December! Right now, a quick glance at the radar shows a few showers trying to develop from Madison southwest to Ogle county near Forreston. Still watching for strong storm potential within the next few hours. The Storm Prediction Center has issued a 20% probability of a watch being issued later this evening.
As of 12:28pm, Rockford has officially broken the all-time record high temperature for December with the mercury climbing to 68°. The previous record was set back on December 5th, 2001. It feels very spring-like this afternoon. Unfortunately, with the warmth also comes the threat for severe weather later this afternoon and evening.
A strong cold front now west of Des Moines, IA will continue to march east this afternoon and cross the Mississippi River after 4pm. While severe parameters remain marginal, the extreme warmth and moisture in place across northern Illinois and southern could lead to a line of broken to scattered thunderstorms developing along the front after 4pm/5pm. Despite a 'true' severe weather set-up this afternoon there appears to be enough energy in the atmosphere that should thunderstorms form they could produce damaging wind gusts. Another threat, although it's low, will be an isolated tornado or two. As storms form there may be enough spin in the atmosphere to get a few storms to rotate which could cause a brief tornado. It's days like these that we need to be on guard because as we all know 70° weather in the beginning of December is not normal. Please keep checking back for the latest information.4
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