Iceresistance wrote:Ntxw wrote:weatherdude1108 wrote:
Doea this mean (in this case) the higher positive number means likely drier?
And if the number were lower/negative number, it means likely wetter (at least for TX/OK)?
I guess the 90 day trend is more the long-term trend?
I'm guessing the latest number is bad for rain in our areas. Just educating myself. Water is a precious thing these days.
SOI is an ENSO proxy. When it is consistently negative, Texas is generally in wet pattern. When consistently positive it is a dry pattern. When you get spikes either way expect a little more extreme (+30/-30 is my general rule for major spikes). When the index has a big swing one way or another then there is likely a pattern shift on the way regarding precip. This is regarding daily values.
30-90 day tells you overall El Nino or La Nina state. Positive being La Nina conditions and negative being El Nino.
September is spiking positive and staying there.
Yeah, it's now above +30 for daily SOI.
Bummer.
I figured so (hoping it wasn't true). I wish there were a "dislike" button.