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1999 VEGETATION CONDITION
07/30 - 08/12/99

COMPARABLE 1998 PERIOD: 07/31 - 08/13/98

NDVI data calculated from the NOAA-14 AVHRR sensor are used to create vegetation condition imagery. Prior to 1995 the NOAA-11 satellite was the source for AVHRR. However, since the NOAA-11 sensor may not be directly comparable, only the NOAA-14 data is used here. The images selectable below include displays of the NDVI index, ratio images showing NDVI from this period divided by NDVI from the comparable 1996 period, and ratio images showing NDVI from this period divided by the Median NDVI from the three previous years (all available years of NOAA-14 data). Agricultural Statistics District (ASD) and/or county boundaries are shown where the resolution allows. Thumbnail images, where available, allow season to-date review. A thumbnail overview of all images is also available. Select a GIF image to view from the three tables below.

Biweekly NDVI Displays:
1999 Continental US US w/Average 1st Frost 9 Period US Thumbnail
1998 Comparable Period KS/OK '99 & '98 ND/SD/NE '99 & '98
IL/IN/IA/MO '99 & '98 WA/OR/ID '99 & '98 Southeast US '99 & '98
CA/NV '99 & '98 Miss. Delta '99 & '98 Texas '99 & '98
Northeast '99 & '98

Ratio Comparison to Median, in Percent:
1999 Continental US US w/Average 1st Frost 9 Period US Thumbnail
KS/OK ND/SD/MN IL/IN/IA/MO
TX/LA ND/SD/MN NDVI+Ratio Northeast

Ratio Comparison to Previous Year, in Percent:
1999 Continental US US w/Average 1st Frost 9 Period US Thumbnail
KS/OK ND/SD/MN IL/IN/IA/MO
TX/LA Northeast
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