[Mick]

Mick, do you have a source for that regional risk summary?

I. Primary, Authoritative Data Sources (Observed Precipitation)
These are the core systems used by hydrologists, state agencies, and climate scientists.
1. NOAA / RCC ACIS (Applied Climate Information System)

• Website: https://www.rcc-acis.org
  
• API Endpoint: https://data.rcc-acis.org
  
• Maintained by: NOAA Regional Climate Centers
  
• Used for:
  • Station-level daily precipitation
    
  • County aggregation
    
  • Season-to-date calculations
    
  • Normals-to-date comparisons (via normal=1)
    
• Gold standard for county-level precipitation analysis
  
• Primary backbone of the compilation
  

<snip>

Wow, this is excellent and I'll be sure to share it with my son, who is studying atmospheric science and engineering in college!

But more to the point, can you share the link where you found that regional risk summary? The data seem to be at odds with what I found from the Santa Barbara County Public Works website.

I think the discrepancy lies in four areas:

1. The water year on Santa Barbara site is Sept. 1 to Aug. 31, which I believe is the old system. The current system is Oct. 1. to September 30.
2. I suspect they used a different base period to compute average annual rainfall. I used 1991 as my arbitrary starting point.
3. Their "as-of" cutoff is 8 a.m., mine was midnight.
4. They used their local proprietary sensors, I used ACIS collectors.

[Mick]

Mick, do you have a source for that regional risk summary?

I. Primary, Authoritative Data Sources (Observed Precipitation)
These are the core systems used by hydrologists, state agencies, and climate scientists.
1. NOAA / RCC ACIS (Applied Climate Information System)

• Website: https://www.rcc-acis.org
  
• API Endpoint: https://data.rcc-acis.org
  
• Maintained by: NOAA Regional Climate Centers
  
• Used for:
  • Station-level daily precipitation
    
  • County aggregation
    
  • Season-to-date calculations
    
  • Normals-to-date comparisons (via normal=1)
    
• Gold standard for county-level precipitation analysis
  
• Primary backbone of the compilation
  

<snip>

Wow, this is excellent and I'll be sure to share it with my son, who is studying atmospheric science and engineering in college!

But more to the point, can you share the link where you found that regional risk summary? The data seem to be at odds with what I found from the Santa Barbara County Public Works website.

I think the discrepancy lies in four areas:

1. The water year on Santa Barbara site is Sept. 1 to Aug. 31, which I believe is the old system. The current system is Oct. 1. to September 30.
2. I suspect they used a different base period to compute average annual rainfall. I used 1991 as my arbitrary starting point.
3. Their "as-of" cutoff is 8 a.m., mine was midnight.
4. They used their local proprietary sensors, I used ACIS collectors.