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04/12 - 04/25/2011

COMPARABLE 2010 PERIOD: 04/13 - 04/26/2010

NDVI data calculated from the AVHRR sensor on the NOAA-18 satellite are used to create vegetation condition imagery beginning in March of the 2011 crop season. No water vapor correction was applied. The images selectable below include displays of the NDVI index for selected US areas. NOAA-18 operational status. Agricultural Statistics District (ASD) and/or county boundaries are shown where the resolution allows. Thumbnail images, which start when at least eight prior periods are available, allow season to-date review. US images with average first frost isolines overlaying NDVI are available starting with the period containing September 1st. Select a GIF or PDF image to view from the tables below.
Biweekly NDVI Displays:
2011 Continental US US w/Average 1st Frost 9 Period US Thumbnail 2010 Comparable Period
KS/OK '11 & '10 ND/SD/NE '11 & '10 IL/IN/IA/MO '11 & '10 Pacific NW '11 & '10
Southeast US '11 & '10 CA/NV '11 & '10 Miss. Delta '11 & '10 Texas '11 & '10
Northeast '11 & '10 Southwest '11 & '10 Nebraska '11  

Ratio Comparison to Previous Year, in Percent:
Continental US US w/Average 1st Frost 9 Period US Thumbnail Pacific NW
Southeast California/Nevada Miss. Delta  
Northeast Southwest Nebraska  

Browse Continental US (PDF Format)
Biweekly NDVI Biweekly NDVI w/Frost

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