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10 February Current

Analysis valid 3:00pm EST 10 Februaray 2011

Quiet across much of the lower 48 today as the system that brought snow and rain across much of the South moves offshore. Temperatures are cold once again today due to an extremely deep trough dives southeast. The red line represents the 552dm 500hPa height contour and indicates where the Februrary average temperature for Indianapolis can be observed. As the map shows, it is far to the south, being pulled down with the trough and passing cyclone.

Figure 2 shows one day contour plot of the 850hPa temperature advection and shows which the trough is propegating. Figure 3 is the Laplacian of Figure 2 and points out the areas of greatest temperature change. This map can be correlated with the traditional 850 heights, temperatures and winds used tolook for maximum areas of warm and cold air advection.

Today's current weather graphic was produced by Tim Lucko

Figure 1. Visible satelite picture of the Eastern 2/3 United States at 2pm. Red lines indicate 552dm 500hPa heights.
Figure 1. Visible satelite picture of the Eastern 2/3 United States at 2pm. Red lines indicate 552dm 500hPa heights. Arrows show direction of motion following cold front.


Figure 2: Gaussian weighted 850 temperature advection smoothed 20 times.

Figure 3. The Laplacian of 850 temperature advection.

Figure 4. 850hPa heights, temperature and wind with circled laplacian max/min values. Orange is warm air advection maximums and Blue cold air advection maximums.

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