Ops, North Dakota

Matched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.

• 1952 USGS Thief River Falls quadrangle1:250000, 2 printings
• 1956 USGS Thief River Falls quadrangle1:250000
• 1957 USGS Thief River Falls quadrangle1:250000
• 1963 USGS Inkster NE quadrangle1:24000
• 1967 USGS Thief River Falls quadrangle1:250000
• 1985 USGS Grafton quadrangle1:100000, 2 printings

Regional context, not property-specific evidence. The National Weather Service names Ops in 1 storm report in 2019: 1 funnel cloud. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.

Every storm recorded in Walsh County

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

This settlement is recorded in the Geographic Names Information System as feature 1033893. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.

Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.