RIVER BASIN AND CROP REGION PALMER DROUGHT INDEX This data set consists of the 1895-1993 percent area in the Palmer Drought Index categories for river basins and crop regions as well as the input year-month temperature and precipitation data that were used to compute the Index. The precipitation and temperature values in these files (palmpreg.95 and palmtreg.95 respectively) were computed by area-weighting the divisional values. The 19 river basins and 4 agricultural regions in these files are identified in the file STDVREG.TXT. Both files have the following format: ELEMENT WIDTH COLUMNS IDENTIFIER 3 001-003 BLANK 1 004-004 YEAR 4 005-008 JANUARY VALUE 7 009-015 . . . DECEMBER VALUE 7 086-092 TEMPERATURE VALUES ARE IN DEGREES F TO HUNDREDTHS PRECIPITATION VALUES ARE IN INCHES TO HUNDREDTHS The Palmer Index file (palmareg.95) lists the percent area in each of the Palmer PDSI drought/wet spell categories for each of the river basins and crop regions identified in the file STDVREG.TXT. The format is: ELEMENT WIDTH COLUMNS IDENTIFIER 3 001-003 BLANK 1 004-004 YEAR 4 005-008 BLANK 1 009-009 MONTH 2 010-011 CATEGORY 1 6 012-017 . . . CATEGORY 11 6 072-077 BLANK 2 078-079 CATEGORIES: 1 = extreme drought 2 = severe drought 3 = moderate drought 4 = mild drought 5 = incipient drought 6 = near normal 7 = incipient wet spell 8 = moist spell 9 = unusual moist spell 10 = very moist spell 11 = extreme moist spell