Hail Storm Summary for Riverton, WY

Riverton, Wyoming has experienced 72 documented hail events within a 15-mile radius since 2015, according to NOAA NEXRAD radar data. The largest recorded hailstone measured 2.5 inches in diameter, and the average hail size across all events is 1.18 inches. The most recent significant event was detected on August 15, 2026. On average, the Riverton area sees approximately 7 hail events per year, making it an area with notable hail activity in Wyoming.

Based on NOAA radar data, properties in Riverton face a high risk of hail damage. Of the recorded events, 16 produced hail under 1 inch, 50 produced hail between 1 and 2 inches (can bruise or crack asphalt shingles), and 6 produced hail over 2 inches (inspection is the normal next step). Storms producing hail over 2 inches have been recorded 6 times in the Riverton area.

Given the high storm frequency in Riverton, homeowners should schedule a professional roof inspection at least once a year, ideally before hail season begins (June through August). Properties with asphalt shingle roofs are especially vulnerable. If your roof is more than 10 years old and has been through multiple hail events, a licensed inspector can check for wear that is hard to see from the ground. Document what you observe promptly. Claim deadlines and coverage rules vary by carrier and policy — confirm yours with your insurer or your state's insurance department. Typical repair costs in the Riverton area range from $8,000–$25,000+ for full roof replacement.

FREMONT County, WY

Hail Exposure in Riverton, WY

10 years of NOAA-linked hail data for Riverton and surrounding areas. 72 events recorded since 2015.

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Total Hail Events

72

Within 15 miles

Largest Hail

2.5"

Inspection is the normal next step

Most Recent Event

August 15, 2026

Last recorded hail

Avg Hail Size

1.18"

Across all events

Hail Storm Summary for Riverton, WY

Storm History

Total events72
Largest hailstone2.5"
Average size1.18"
Most recentAugust 15, 2026
Per year avg7

Data from 2015 to present, 15-mile radius

Risk Assessment

High Risk
Under 1"16 (22%)
1" to 2"50 (69%)
Over 2"6 (8%)

Hail 1″+ can bruise or crack asphalt shingles; at 2″+ a professional inspection is the normal next step. A recorded size is exposure, not a damage finding.

What You Should Do

Schedule a professional roof inspection at least once a year, ideally before hail season (June through August). Properties with asphalt shingle roofs are especially vulnerable. If your roof is more than 10 years old and has been through multiple hail events, a licensed inspector can check for wear that is hard to see from the ground; whether anything found is covered depends on your policy and carrier. Typical repair costs range from $8,000–$25,000+ for full roof replacement.

Most Wyoming insurance policies cover hail damage
Confirm claim windows with your insurer
Free inspections available from local contractors

Hail Events Near Riverton

69 events within 15 miles · Click for details

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Significant Hail Events

Events with hail 1" or larger near Riverton

DateHail SizeCountyDistance
Aug 15, 20261"14.7 mi
Jul 31, 20251.25"12.2 mi
Jul 31, 20251.25"12.1 mi
Jul 16, 20252"14.3 mi
Jul 15, 20251.25"13.3 mi
Aug 19, 20231.25"13.0 mi
Aug 19, 20231.25"11.7 mi
Aug 19, 20231.75"10.5 mi
Aug 19, 20231.25"10.6 mi
Jun 23, 20231"13.9 mi
Jun 23, 20231.5"14.7 mi
Jun 23, 20231.25"12.2 mi
Jun 23, 20231.25"11.5 mi
Jun 23, 20231"9.7 mi
Jun 23, 20231.25"4.7 mi
Jun 7, 20231"13.4 mi
Jun 7, 20231"15.0 mi
May 26, 20231.75"11.4 mi
May 26, 20231.25"9.3 mi
May 26, 20231"14.2 mi
May 26, 20231"13.0 mi
May 26, 20231.25"14.7 mi
May 25, 20231.25"14.3 mi
May 25, 20231.25"11.5 mi
May 25, 20231"11.3 mi

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Riverton Hail Damage FAQ

How many hail events has Riverton, WY experienced?+

Riverton, WY has recorded 72 hail events within a 15-mile radius since 2015, based on NOAA NEXRAD radar data. Each of these events represents a documented storm detection from the NOAA radar network.

What is the average hail size in Riverton?+

The average hail size recorded near Riverton is 1.18 inches. The largest single event recorded reached 2.5 inches. Hail of 1 inch or larger can bruise or crack asphalt shingles, and at 2 inches or larger a professional roof inspection is the normal next step after a storm. A recorded size is exposure, not a damage finding. Only a licensed roof inspection can determine whether a specific roof was damaged; coverage depends on the policy and carrier.

When is hail season in Wyoming?+

Hail season in Wyoming typically runs June through August. During these months, atmospheric conditions create powerful convective thunderstorms capable of producing large hail. Riverton residents should inspect their roofs after any storm and consider a professional inspection each spring.

Does insurance cover hail damage in Wyoming?+

Many standard homeowner's policies in Wyoming include hail under a "wind and hail" peril, but coverage and deductibles differ from one policy to the next. Claim deadlines and coverage rules vary by carrier and policy — confirm yours with your insurer or your state's insurance department. Document what you observe promptly. Even when nothing is obvious from the ground, a licensed roofer can check for impacts during an inspection — and that inspection, not a hail record, is what shows whether a roof was damaged.

How do I check my roof for hail damage in Riverton?+

Start by looking for obvious signs from the ground: dented gutters, dings on metal vents, chipped paint, or broken skylight glass. On the roof itself, hail damage appears as dark circular bruises or "spatter" marks on asphalt shingles where granules have been knocked away. Because roof damage is often subtle, many Riverton homeowners miss it without a professional inspection. If HailScore shows events of 1 inch or larger near your property, scheduling a free inspection with a local contractor is strongly recommended.

What is a HailScore and how is it calculated?+

A HailScore is a 0–100 risk index that measures historical hail activity near a specific property. The score is calculated from five factors derived from NOAA NEXRAD radar data: storm frequency (how many events), recency (recent storms score higher), hail size (larger hail = more damage potential), cumulative damage (repeated storms compound wear), and proximity (storms closer to your address weigh more). A score of 0–25 is Low, 26–50 is Moderate, 51–75 is High, and 76–100 is Very High — the same sacred bands used on the live report.

Should I get a roof inspection in Riverton?+

If your property is in Riverton and nearby storms have produced hail of 1 inch or larger, a professional roof inspection is worth scheduling. Riverton has recorded hail up to 2.5 inches nearby — large enough to bruise or crack asphalt shingles — but a recorded size is exposure, not a finding about your roof. Many roofing contractors in WY inspect at no charge and can document what they find; whether any of it is covered depends on your policy and carrier.

How much does hail damage roof repair cost in Riverton?+

Hail damage repair costs in Riverton typically range from $8,000–$25,000+ for full roof replacement. The final cost depends on roof size, pitch, material type (asphalt shingles vs. metal vs. tile), and the extent of damage a licensed inspection finds. Whether a confirmed repair is covered, and what deductible applies, depends on your policy and carrier. Getting more than one contractor estimate before deciding whether to file is a reasonable step.

What NOAA data does HailScore use for Riverton?+

HailScore uses data from the NOAA NEXRAD radar network (Next Generation Weather Radar), specifically the SWDI (Severe Weather Data Inventory) maintained by NCEI (National Centers for Environmental Information). For Riverton, we analyze all radar-detected hail events within a 15-mile radius from 2015 to present, totaling over 72 NOAA-linked events. Each record includes the storm's timestamp, geographic coordinates, and hail diameter in inches (radar-estimated or ground-reported).

How accurate is HailScore data for Riverton?+

HailScore data comes directly from NOAA's NEXRAD radar network, which is the same system used by the National Weather Service for official storm reporting. Radar sizes are a class rather than a measurement: MESH is tuned so that roughly 75% of measured hail comes in at or below the estimate, so read a size as accurate to about one tier. We use the 15-mile radius to capture hail that may have affected your specific neighborhood even if the storm center was nearby. For the most precise assessment of your individual property, a physical roof inspection by a licensed contractor is always recommended.

Need a Riverton address's hail history as a document?

The Official Hail History Report is a one-off $9.95 PDF: the NOAA Storm Events and NEXRAD radar records within 1 mile of the address over 10 years, each with its government source ID. Documents exposure, not damage.

Order the PDF — $9.95

Weather data provided by NOAA National Weather Service and Storm Prediction Center. This product is not affiliated with or endorsed by the U.S. Government. Data covers 2015 to present within a 15-mile radius of Riverton city center.