Map released: Thurs. October 1, 2020
Data valid: September 29, 2020 at 8 a.m. EDT


  • None
  • D0 (Abnormally Dry)
  • D1 (Moderate Drought)
  • D2 (Severe Drought)
  • D3 (Extreme Drought)
  • D4 (Exceptional Drought)
  • No Data


The Drought Monitor focuses on broad-scale conditions. Local conditions may vary. See accompanying text summary for forecast statements.

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USAPI Drought Summary

Rainfall totals were less than 2 inches at Palau’s International Airport and the COOP station for the week ending September 29. The monthly rainfall total was 6.43 inches at the airport and over 10 inches at the COOP station. Although rainfall totals for the week were slightly below the 2-inches threshold to meet most water needs, drought free conditions continued across Palau.

Across the Marianas, Guam and Rota had a wet week, with precipitation totals over the weekly 1-inch threshold to meet most water needs. Rota had the most rainfall at 5.39 inches for the week and a monthly total of 17.90 inches. Guam’s monthly rainfall total was over 10 inches. Both of these locations continued in drought free conditions. Saipan was the exception, experiencing a dry week. Rainfall totals were 0.06 inch at the manual gauge, 0.60 inch at the ASOS station, and 0.20 inch at the NPS station. However, last week was a very wet week for Saipan, receiving almost 5 inches of rain. The monthly rainfall total for Saipan was 7.46 inches. Drought free conditions were unchanged for Saipan.

Several FSM locations (Lukunor, Kapingamarangi, and Ulithi) had a dry week, receiving less than 1 inch of rain. Of these stations, Kapingamarangi had the least amount of rain at 0.23 inch of rain for the week. Following a dry August with only 2.94 inches of rain, the monthly rainfall total for Kapingamarangi in September was only 0.86 inch of rain. According to local reports, 2 of 6 community tank reserves on the island were empty, another one was in use and the remaining 3 were full at the time of this analysis. They expect that with very strict water usage, the remaining water tanks will last for about two months. Other reports also stated that the vegetation on the island was turning brown. Given the very low rainfall totals and local impacts, Kapingamarangi’s drought classification was changed to extreme drought (D3-S). Even though this was a dry week for Lukunor, its monthly rainfall total was over 8 inches of rain, resulting in continued drought free conditions. Ulithi’s monthly rainfall total was 6.91 inches, however, drought free conditions were unchanged this week. Yap, Pohnpei, Kosrae, Fananu, and Pingelap had over 1.5 inches of rain and continued in drought free conditions. Meanwhile, Nukuoro, Chuuk Lagoon and Woleai were the only locations to receive over 2 inches of rain this week. Chuuk Lagoon had the most rain at 4.02 inches of rain. These locations continued in drought free conditions.

This was a very wet week for most of the Marshall Islands. Mili, Ailinglaplap, and Kwajalein had the most rain, with totals ranging between 5-7 inches of rain. Majuro had a wet week as well, with rainfall totals over 3 inches. Drought is not a concern for these locations. Although Jaluit had a wet week with over 2 inches of rain for the week, the monthly rainfall total was 5.72 inches, which is below the 8-inches needed for most water needs. Abnormally dry conditions were unchanged for Jaluit. Meanwhile, Wotje continued in severe drought this week as the location had no rain.

Pago Pago and Siufaga Ridge continued in drought free conditions as they received a little over 1 inch of rain for the week.

Full Summary

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