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Hail history in Knox, ND

Radar has detected major hail over the Knox area on 26 days since 2011, up to 2.5" (tennis ball size) on June 29, 2019. Source: NOAA Severe Weather Data Inventory radar signatures, which estimate hail aloft near Knox, not confirmed ground reports.

Data last updated: July 28, 2026

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Every major hail day near Knox

September 12, 2025up to 1" near Knox · storm peaked at 3.25" (Leeds area)July 26, 2025up to 1.5" near Knox · storm peaked at 2.5" (Pingree area)July 9, 2025up to 1.25" near Knox · storm peaked at 2.5" (Velva area)June 22, 2025up to 1" near Knox · storm peaked at 3" (McHenry area)September 16, 2024up to 1.75" near Knox · storm peaked at 3" (Anamoose area)July 13, 2024up to 1.75" near Knox · storm peaked at 2" (Rugby area)July 2, 2023up to 1" near Knox · storm peaked at 1.25" (Rolette area)June 8, 2023up to 1.25" near Knox · storm peaked at 1.75" (New Town area)June 13, 2022up to 1" near Knox · storm peaked at 3.25" (Martin area)May 17, 2022up to 1.25" near Knox · storm peaked at 2" (Barton area)August 9, 2021up to 1.5" near Knox · storm peaked at 3.75" (McHenry area)July 17, 2020up to 2" near Knox · storm peaked at 4" (Ruthville area)August 19, 2019up to 1" near Knox · storm peaked at 2.25" (Leeds area)June 29, 2019up to 2.5" near Knox · storm peaked at 3.25" (Wolford area)September 13, 2018up to 1.25" near Knox · storm peaked at 1.25" (Alsen area)September 6, 2018up to 1.75" near Knox · storm peaked at 2.5" (Hebron area)July 14, 2018up to 1.25" near Knox · storm peaked at 3.5" (Golden Valley area)July 1, 2018up to 1" near Knox · storm peaked at 2" (New Rockford area)June 27, 2018up to 1" near Knox · storm peaked at 2.5" (Haynes area)June 2, 2017up to 1.25" near Knox · storm peaked at 2.5" (Napoleon area)August 3, 2016up to 2.25" near Knox · storm peaked at 4" (Mylo area)July 9, 2013up to 1.25" near Knox · storm peaked at 3.25" (Forbes area)June 17, 2012up to 1" near Knox · storm peaked at 2.25" (Barton area)August 12, 2011up to 1.5" near Knox · storm peaked at 2.75" (Pettibone area)July 20, 2011up to 1" near Knox · storm peaked at 2.75" (Max area)June 7, 2011up to 1" near Knox · storm peaked at 2.25" (Alamo area)

What this record means for a Knox roof

The list above covers 26 radar-confirmed hail days over Knox between 2011 and 2025. The largest signature recorded over the Knox area was 2.5" (tennis ball size) on June 29, 2019. Radar put the local estimate at or above the 1" mark, the size generally capable of damaging asphalt shingles, on every one of those days.

Insurers and their adjusters can pull this same NOAA archive, so a date on this list is not news to the company handling a claim. What the archive cannot show is the condition of your specific roof, which is why dated photos and a written inspection report carry the weight in a dispute. Most homeowner policies also set a deadline to report storm damage, commonly one or two years from the date of loss, so a recent date above matters most if the roof was never inspected after it.

Get the roof inspected, free

Radar cannot confirm what hit your shingles; an inspection can, and it costs you nothing. Angi matches you with licensed local roofers who inspect for free and bid the work. Know how it works going in: the roofers pay Angi for the introduction, you pay nothing, and more than one company may call. That is the useful part: multiple written estimates are exactly what you want in hand before an adjuster visit or a contract.

Find licensed roofers near you on Angi

Referral disclosure: this site may earn a fee if you request quotes through this link. That does not change what you pay, and no contractor pays to be described a certain way here.

Before you sign anything, read the contractor red flags: assignment-of-benefits traps, deductible games, and storm-chaser tells.

Common questions

Has Knox had hail big enough to damage roofs?

Radar has detected hail up to 2.5" (tennis ball size) over the Knox area, most recently on September 12, 2025. Hail of 1" or larger is generally considered capable of damaging asphalt shingles.

Does this prove my roof was damaged?

No. Radar estimates hail aloft, accurate to roughly a mile, and cannot confirm what reached any specific roof. It is a strong reason to document your roof and check your policy's claim deadline after a listed date, not proof of damage.

How do I check my exact address in Knox?

Use the free address lookup on this site. It searches the same NOAA radar archive within a radius you choose around your address, back to 2011.

If one of these dates is recent