This chart is updated on the hour from SD data. The tops and movement data are extracted from the SD data and placed on the chart according to the code in the SD observation. If you check it at 5 - 10 minutes after the hour you should get the most current chart. Some NWS Radar Sites do not place a high priority on issuing SD's; therefore some data may be missing. The resolution of the data is quite low; this chart should be used to give you a summary idea of the precipitation displayed. Consult a composite radar or NEXRAD image for detailed and timely precipitation info. Of course, Universal provides more detailed radar images in the registered Flight Crew area.
The time in () is the time the SD observation was taken and the other is the run time.
The regional radar summarys provide a little more detail on the tops and movements of the Cells or Areas.
LEGEND: +MT180 = Max Top at 18,000 Feet. A=Area, C=Cell, or L=Line Movement. C40/120=Cell Moving at 40 knots with a 12,000 feet top. The Arrow points in the direction of movement.
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