For the period beginning in March 2015 and extending through February 2016, the continental United States is forecast to experience numerous regionally significant water anomalies:
- Exceptional drought will persist in northern California through the Pacific Northwest;
- Southern California is forecast to have characteristics of both water deficits and surpluses;
- Exceptional water surpluses are forecast for portions of Texas, Oklahoma, Kansas, Nebraska, Colorado, New Mexico, and Louisiana; and,
- Severe to extreme deficits are forecast for portions of the Northeast.
WSIM Composite Water Anomaly Index for Mar 2015 through Feb 2016
The 3-month composites for the same 12-month period show the evolving conditions in more detail (second image). The deficits on the West Coast are forecast to intensify June through August, moderate September through November, and then transition to severe surpluses in California December through February. The region of exceptional surpluses in the Southern and Central Plains is forecast to expand in June through August. From September through November the forecast calls for a broad band of moderate surpluses to emerge from Louisiana through Wisconsin. This band of surpluses is forecast to expand from December through February to encompass much of the country.
WSIM Composite Water Anomaly Index 3-month, Mar 2015 through Feb 2016
- October 2024 13
- September 2024 13
- August 2024 13
- July 2024 13
- June 2024 13
- May 2024 13
- April 2024 14
- March 2024 13
- February 2024 13
- January 2024 13
- December 2023 15
- November 2023 12
- October 2023 18
- September 2023 13
- August 2023 13
- July 2023 11
- June 2023 15
- May 2023 14
- April 2023 17
- March 2023 15
- February 2023 9
- January 2023 14
- December 2022 14
- November 2022 14
- October 2022 14
- September 2022 14
- August 2022 14
- July 2022 14
- June 2022 14
- May 2022 14
- April 2022 14
- March 2022 14
- February 2022 14
- January 2022 14
- December 2021 14
- November 2021 14
- October 2021 14
- September 2021 15
- August 2021 14
- July 2021 14
- June 2021 14
- May 2021 14
- April 2021 14
- March 2021 14
- February 2021 14
- January 2021 14
- December 2020 14
- November 2020 14
- October 2020 14
- September 2020 14
- August 2020 14
- July 2020 14
- June 2020 14
- May 2020 14
- April 2020 14
- March 2020 14
- February 2020 14
- January 2020 14
- December 2019 1
- November 2019 14
- October 2019 14
- September 2019 14
- August 2019 14
- July 2019 14
- June 2019 14
- May 2019 16
- April 2019 14
- March 2019 17
- February 2019 25
- January 2019 2
- December 2018 14
- November 2018 14
- October 2018 14
- September 2018 14
- August 2018 14
- July 2018 14
- June 2018 14
- May 2018 14
- April 2018 14
- March 2018 14
- February 2018 14
- January 2018 15
- December 2017 21
- November 2017 8
- October 2017 15
- September 2017 14
- August 2017 14
- July 2017 14
- June 2017 14
- May 2017 14
- April 2017 14
- March 2017 15
- February 2017 15
- January 2017 14
- December 2016 18
- November 2016 10
- October 2016 14
- September 2016 14
- August 2016 15
- July 2016 14
- June 2016 14
- May 2016 15
- April 2016 14
- March 2016 15
- February 2016 14
- January 2016 14
- December 2015 14
- November 2015 14
- October 2015 12
- September 2015 11
- August 2015 11
- July 2015 16
- June 2015 6
- May 2015 9
- April 2015 10
- March 2015 6