Thursday, September 5, 2013

Precipitation Update for the High Plains Region

Precipitation Update for the High Plains

The following maps show the percent of normal precipitation and departure from normal precipitation for the High Plains region for two time periods, the last 30 days and the last 60 days.  Summer precipitation is dominated by convective precipitation which produces "hit or miss" thunderstorms producing significant rainfall for some areas and completely bypassing other nearby areas.

The last 30 days (August 6 to September 4, 2013):
Lincoln, NE, as of September 4, 2013 has only received 0.45 inches of precipitation since August 6, 2013 (note the map below with the red area of 5%-25% of normal precipitation for Lincoln and Lancaster County). Yet, Omaha, NE, only 50 miles from Lincoln, has received 2.17 inches for the same period and is an area of light blue on the map with 50% to 75% of normal precipitation.  And, just to the north of Omaha in northeast Nebraska there is a region of 150% to 200% of normal precipitation.

The last 60 days (July 7 to September 4, 2013):
The contrast across the High Plains region is even more dramatic if we look at the last 60 days of precipitation. Areas of South Dakota, north central Nebraska and Kansas have received from 200% to 300% of normal precipitation. Yet, southeast Nebraska as noted on the 60 day map has received only 25%-50% of normal precipitation.  North Dakota has a region that has received 150% to 200% of normal precipitation and nearby within the same state there is an area that has only received 5% to 25% of normal precipitation.



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