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04/06 - 04/19/2005

COMPARABLE 2004 PERIOD: 04/08 - 04/21/2004

NDVI data calculated from the AVHRR sensor on the NOAA-17 satellite are used to create vegetation condition imagery beginning in March of the 2004 crop season. No water vapor correction was applied. The images selectable below include displays of the NDVI index for selected US areas. Ratio images to the previous year are shown. 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. Images are in GIF format unless otherwise noted.

Biweekly NDVI Displays:
2005 Continental US US w/Average 1st Frost 9 Period US Thumbnail 2004 Comparable Period
KS/OK '05 & '04 ND/SD/NE '05 & '04 IL/IN/IA/MO '05 & '04 WA/OR/ID '05 & '04
Southeast US '05 & '04 CA/NV '05 & '04 Miss. Delta '05 & '04 Texas '05 & '04
Northeast '05 & '04 Southwest '05 & '04 Nebraska '05  

Ratio Comparison to Previous Year, in Percent:
Continental US US w/Average 1st Frost 9 Period US Thumbnail
TX/LA Northeast Southwest

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

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