BlockDiagonal, Iowa
8 topographic sheets cover this place, the earliest surveyed in 1955 and the latest in 1985. It stands in Washington Township. It lies in ZIP code area 50845. It stands on Sun Valley Creek. The Survey maps it on the Diagonal quadrangle. 344 people lived here at the 2020 count. It stands 1,148 feet above sea level.
On record in Diagonal
Buildings and businesses the archive holds for this place. Each opens its own page, with the source record it came from.
On the National Register 1 record
- W. J. Buck Polygonal Barnlisted 1986
Population over time
2 figuresDiagonal grew from 330 to 344 between 2010 and 2020. These are the recorded population figures Wikidata holds for this place, reached through the Geographic Names Information System number this page is keyed on rather than by name, so they belong to this place and not to another of the same name. Most are census counts, but not all are: an early figure may be a founding or settlement estimate, and an estimate published within five years of a census is left out. The change column is computed, and is left blank where more than 20 years separate a figure from the one before it, because a gap that long is not a change between two counts.
| Year | People | Change |
|---|---|---|
| 2010 | 330 | |
| 2020 | 344 | +14 (+4%) |
Topographic sheets covering this place
5 surveys from 8 printed sheetsMatched 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.
- 1955 USGS Nebraska City quadrangle1:250000, 3 printings
- 1957 USGS Nebraska City quadrangle1:250000
- 1958 USGS Nebraska City quadrangle1:250000
- 1981 USGS Diagonal quadrangle1:24000
- 1985 USGS Mount Ayr quadrangle1:100000, 2 printings
Storms near this place
14 since 1998Regional context, not property-specific evidence. The National Weather Service names Diagonal in 14 storm reports between 1998 and 2024: 7 hail, 4 thunderstorm wind, 2 tornado, 1 heavy rain. 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.
| When | Event | Place named | Harm | What the report says |
|---|---|---|---|---|
| April 2024 | Tornado (EF2) | Diagonal | $350,000 | This tornado developed in rural Ringgold County between Mt. Ayr and Diagonal. The tornado moved northeast with some damage to outbuildings and trees. The tornado crossed Highway 169 southwest of Tingley before moving through the center of town. Up to EF2 damage occurred with Tingley with an upper floor removed from one house and the destruction of some outside walls of a brick building in the downtown area. The tornado impacted a couple more farmsteads with EF0 to EF1 damage before dissipating to the northeast of Tingley. |
| June 2014 | Thunderstorm Wind | Diagonal | $100,000 | A farm outbuilding was destroyed with debris blown southeast. |
| June 1998 | Thunderstorm Wind | Diagonal | $100,000 | no account filed |
| June 2014 | Thunderstorm Wind | Diagonal | $50,000 | Partial loss of a roof covering a home and tree damage reported in town. Roofing material was blown southeast. |
| June 1998 | Hail | Diagonal | $25,000 | no account filed |
| August 2004 | Thunderstorm Wind | Diagonal | $5,000 | no account filed |
| June 2002 | Hail | Diagonal | $5,000 | no account filed |
| June 2004 | Hail | Diagonal | $3,000 | no account filed |
| April 1998 | Hail | Diagonal | $500 | no account filed |
| June 2020 | Heavy Rain | Diagonal | - | Trained spotter reported 1.15 inches of rain in 15 minutes along with pea to dime sized hail. |
| May 2013 | Tornado (EF0) | Diagonal | - | A brief tornado touchdown occurred. |
| September 2005 | Hail | Diagonal | - | no account filed |
| May 2004 | Hail | Diagonal | - | no account filed |
| August 2004 | Hail | Diagonal | - | no account filed |
Nearest settlements
The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.
| Map | Place | Distance | Sheets |
|---|---|---|---|
| Knowlton | 1.3 miles | 8 | |
| Mortimer (historical) | 5.3 miles | 8 | |
| Marshall (historical) | 5.9 miles | 13 | |
| Polen | 5.9 miles | 8 | |
| Benton | 7.4 miles | 13 | |
| Tingley | 8.3 miles | 8 | |
| Mount Ayr | 8.7 miles | 12 | |
| Maloy | 10.0 miles | 13 |
Elsewhere
Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.
| Wikipedia article on Diagonal | An encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied. |
| Wikidata item Q532351 | The structured record the population and elevation above come from. Public domain (CC0). |
Provenance
This settlement is recorded in the Geographic Names Information System as feature 455904. 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.