Drought Monitor Map Puerto Rico and the U.S. Virgin Islands


Current Drought Monitor Map for Puerto Rico and the U.S. Virgin Islands

United States Drought Monitor

Puerto Rico

Summary for Puerto Rico this week

Heavy rains (3-6 inches, locally to a foot) fell along the northwestern, north-central, and far northeastern sections of Puerto Rico, but these areas were mostly drought free. A few areas that observed heavy rains, however, were in D0 or D1 (northeastern and central sections of the island), and a 1-category improvement was made there. 7-day averaged near-record low USGS stream flows were confined to a few sites along the southwestern coast, while the rest of the island was normal or above-normal.

U.S. Virgin Islands

Summary for the U.S. Virgin Islands this week

Scattered showers affected the U.S. Virgin Islands in early September, following Hurricane Dorian’s passage in late August. Although showers were mostly light, a few spots received totals in excess of 2 inches. For example, a CoCoRaHS observer near Christiansted, on St. Croix, reported a weekly sum of 2.45 inches. Several other locations, including King Airport on St. Thomas and a volunteer observer on the northern shore of St. John, received less than an inch. Well reports from the U.S. Geological Survey noted little change in groundwater levels in recent days. Taking all factors, including the Standardized Precipitation Index, into account, D0-L was retained for St. Croix, while D-nothing was maintained for St. Thomas and St. John.

About the Drought Classification

The Drought Monitor summary map identifies general areas of drought and labels them by intensity. D1 is the least intense level and D4 the most intense. Drought is defined as a moisture deficit bad enough to have social, environmental or economic effects.

D0 areas are not in drought, but are experiencing abnormally dry conditions that could turn into drought or are recovering from drought but are not yet back to normal.

We generally include a description on the map of what the primary physical effects are for short- and long-term drought.

  • S = Drought typically less than 6 months (e.g. agriculture and grasslands)
  • L = Drought typically more than 6 months (e.g. hydrology, ecology)

Learn more about the Drought Classification

Source: United States Drought Monitor

The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture, and the National Oceanic and Atmospheric Administration. Map courtesy of NDMC.

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