Percent of U.S. Mainland in Selected
Drought Ranges -- May 9, 2009
Percentile
Range
Short-Term
Drought Indicator Blend
Long-Term
Drought Indicator Blend
 Current   Anomaly*   Percentile*   Change**   Current   Anomaly*   Percentile*   Change** 
0-30 (D0)   20.82 - 9.36 30.42 + 0.73 20.41 - 9.80 34.49 - 0.79
0-20 (D1)   13.87 - 6.27 37.50 + 0.53 14.19 - 6.00 42.46 + 2.59
0-10 (D2)    5.51 - 4.56 37.94 - 0.22  2.94 - 7.19 28.21 - 1.42
0-5 (D3)    3.31 - 1.79 50.25 + 2.16  1.34 - 3.79 36.18 + 0.66
0-2 (D4)    1.89 - 0.18 69.67 + 1.88  0.66 - 1.40 52.54 + 0.38
*Anomalies & percentiles based on monthly 1932 - 2001 data from National Climatic Data Center.
**Change from Previous Week's Percentage of U.S. Covered