Catalog http://thredds.northwestknowledge.net:8080/thredds/cires_nccasc_drought_catalog.html

Dataset	Size	Last Modified
`1-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`
`2-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`
`3-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`
`4-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`
`5-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`
`6-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`
`7-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`
`8-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`
`9-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`
`10-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`
`11-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`
`12-month Standardized Precipitation Evapotranspiration Index (SPEI)/`		`--`