> Meteorologists and climatologists from the NDMC, NOAA and USDA take turns as the lead author of the map, usually two weeks a time. The author’s job is to do something that a computer can’t. When the data is pointing in different directions, they make sense out of it.
> How do we know when we're in a drought?
> No single piece of evidence tells the full story, and neither do strictly physical indicators. That’s why the USDM isn’t a statistical model
hyperrail 44 minutes ago [-]
Doesn't seem like all climate scientists are fans of it either. From a 2022 critique of a news story also based on this map:
> The essential message is that weather and climate data do not support the claims of extreme or severe drought in eastern Washington this year.
> There is no expectation of water problems over or near the Columbia Basin. The Drought Monitor graphics, which are created subjectively, are sufficiently problematic and deficient that they should not be considered or applied to any serious decision making.
mc32 4 minutes ago [-]
I like the map. It's usually on track but sometimes it's quite a bit off. I've seen it say drought when it's been wet --maybe just not as wet as usual. It also doesn't indicate when above average and I do not think it averages precip out when a wet week was extremely wet and the next one dry. It'll say it was dry last week. In other words you could have cumulative average precip but it's only counting last week's precipitation.
> [Authors] bring together the physical climate, weather and hydrology data and reconcile that with local expert feedback, impact reports and conditions observations. The author is also responsible for weighing different indicators based on what’s most appropriate for a particular place and time of year. In the West, for example, winter snowpack has a stronger bearing on water supplies than in the East
HerbManic 34 minutes ago [-]
It also sounds like that old adage of - All models are wrong but some are useful. Alas, we probably only know how useful they where afterwards.
devindotcom 5 minutes ago [-]
i think calling it "subjective opinion" is kind of disingenuous. it is a subject matter expert interpreting the data. there is a vast gulf between that and someone else simply offering their opinion on the matter.
ericpauley 57 minutes ago [-]
Title is somewhat incorrect: more than 60% of the U.S. is facing drought, making it overall the worst in decades. The data do not show that the drought in each area is the worst in decades.
krackers 22 minutes ago [-]
Whether or not it's true, this is going to be great fodder for the people who believe AI is using up all the water.
gerdesj 10 minutes ago [-]
What are your thoughts on that?
I hope to hear words like "bollocks" and "bullshit" dispersed equitably.
https://droughtmonitor.unl.edu/About/WhatistheUSDM.aspx
> Who draws the map?
> Meteorologists and climatologists from the NDMC, NOAA and USDA take turns as the lead author of the map, usually two weeks a time. The author’s job is to do something that a computer can’t. When the data is pointing in different directions, they make sense out of it.
> How do we know when we're in a drought?
> No single piece of evidence tells the full story, and neither do strictly physical indicators. That’s why the USDM isn’t a statistical model
https://cliffmass.blogspot.com/2022/04/is-large-portion-of-w...
> The essential message is that weather and climate data do not support the claims of extreme or severe drought in eastern Washington this year.
> There is no expectation of water problems over or near the Columbia Basin. The Drought Monitor graphics, which are created subjectively, are sufficiently problematic and deficient that they should not be considered or applied to any serious decision making.
> [Authors] bring together the physical climate, weather and hydrology data and reconcile that with local expert feedback, impact reports and conditions observations. The author is also responsible for weighing different indicators based on what’s most appropriate for a particular place and time of year. In the West, for example, winter snowpack has a stronger bearing on water supplies than in the East
I hope to hear words like "bollocks" and "bullshit" dispersed equitably.