Temperature - 67.8 degrees Fahrenheit
Dew point - 59 degrees Fahrenheit
Relative humidity - 74%
Wind direction - WSW (http://hint.fm/wind/index.html)
Wind speed - 5 mph
Barometric pressure - 1029.65 g/kg
Cloud cover -
If you were up early this morning or woken up shortly after 1am, you can definitively understand the correlation between the drop in barometric pressure and the strongest point in the storm around this time period.
The surface map above is relevant to the period in which the intensity of the storm last night was reaching its peak. What exactly was occurring to cause the rain we received last night was the warm moist conditionally unstable air from the Gulf Coast was rising over the cold air-mass on the stationary front. As a result the the cold air lifting the warm air-mass caused the temperature of the warm air-mass to reach it's dew point, which caused the rain the Eau Claire area experienced. But what is happening to today...
On the current surface map you can see that the warm air-mass rose over the top of the cold air-mass in the stationary front last night. The warm front currently moving over Eau Claire is what has brought us warm temperatures today, temperatures that will likely hit the mid-80's. Although this storm system looks like it is almost dead, as is usually an accurate indication due to the occluded front, it is still kicking. I expect a revival from this storm as is it passes over the Great Lakes and consolidates with the low pressure system north of Lake Superior. This will bring some precipitation to Canada around late tonight into the early morning hours tomorrow. As the low pressure system moves NE the Eau Claire area we'll experience a drop in temperatures tonight associated with the cold front from this system moving through. I expect this will cause some fog tomorrow morning. I will keep you all posted on fog conditions for tomorrow morning, especially those of you making a morning commute.
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