High pressure dominates the eastern portion of the country on Tuesday bringing calm and mostly sunny skies. However, warm air advection from the South will bring warm and windy conditions to the Central Plains, southeastern Midwest and Mississippi Valley. While the conditions remain primarily quiet in the East, a cold front passes over the Pacific Northwest crossing the Northern Plains and Rocky Mountains Tuesday that will bring snow and rain showers behind it. As this cold front slides eastward Wednesday it will showers and strong winds to the Central Plains and Midwest into Wednesday evening. The following graphic depicts the warm air advection that will bring warm and windy conditions to the Central Plains, Midwest and Mississippi for Tuesday.
In Champaign-Urbana on Tuesday temperatures will rise up to 60°F from a morning low of 29 °F as a strong warm SSE wind moving at 14-31mph and gusting up to 39 mph will be accompanied by sunny skies. For Wednesday, warm air doesn’t go anywhere as the daytime high could reach up to 62°F with a low of only 42°F. Windy conditions will persist Wednesday with a SSW at 16-33 mph. During the day Wednesday, skies will be partly cloudy, but clouds will increase as we shift to the evening hours. As the clouds increase Wednesday night we will likely see rain showers and even some possible thunderstorms.
For Tuesday temperatures got much warmer than what I predicted with an actual high reaching 68°F, 8 degrees warmer than my forecasted high, while my low temperature was not as far off and only 3 degrees colder than the observed low. However, besides temperatures my forecast was pretty accurate with a SSW rather than SSE wind averaging at 22.0 mph accompanied with clear sunny skies. Similarly, my forecast for Wednesday was off as my forecast high was 7 degrees colder than the actual high of 69°F and my low temperature was 6 degrees colder than the 48°F low. We did however end up seeing partly sunny skies and some rain showers later in the evening that accumulated .02" of rain. In addition, winds were in fact from the SSW and were as fast as I had predicted averaging at 25.1 mph.
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