NOAA-verified historic hailstorm
July 14, 2011 Adams County, CO Hailstorm
1 hail event recorded between 9:40 PM MDT and 9:40 PM MDT. Peak hail size: 4.5".
On July 14, 2011, NOAA recorded hail up to 4.5" in Adams County, Colorado — 1 hail event between 9:40 PM MDT and 9:40 PM MDT. Source: NOAA Storm Events Database (NCEI), via HailScore. Data current as of August 25, 2026.
The 1st-largest hailstorm recorded in Adams County since 2015 — out of 42 separate hail days on NOAA's record.
The biggest on record: May 10, 2023 — 2.75" hail.
Storm map
Each pin marks one NOAA-recorded hail event. Larger pins = larger hail.
Source: NOAA Storm Events Database (NCEI). Coordinates are NWS-reported event locations.
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Official Hail History Report
Every hail event recorded within 1 mile of your address over the past 10 years — each with its date, size, distance, and government source ID — plus an optional date-of-loss check for one specific storm. Built to hand to an adjuster, a buyer, or your own file.
It documents the storm record for an address. It is not a roof inspection or a damage assessment.
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HailScore Pro
Contractors, adjusters and public adjusters run this same storm record across a whole pipeline. A free dashboard account includes 10 date-of-loss verifications a month; Team is $49/mo for 25 storm-history PDFs.
Hail history for cities in Adams County
Every recorded storm for each area, not just this one:
Hail size distribution
Cosmetic damage potential
Damages asphalt shingles
Severe roof damage
Total roof replacement
Individual NOAA event records
Every record carries a unique NOAA event ID adjusters can independently verify.
| Time (MT) | Hail size | Location | NOAA event ID |
|---|---|---|---|
| 9:40 PM MDT | 4.5" | 39.750, -104.600 | 331553 |
Frequently asked questions
What was the largest hail size on July 14, 2011 in Adams County?+
NOAA's Storm Events Database recorded a peak hail size of 4.5" during the July 14, 2011 storm in Adams County, Colorado. Hail of this size (4.5") routinely causes total roof replacement, broken windshields, and structural damage. Adams County properties exposed to this storm should have received insurance-eligible damage.
How many hail events were recorded during this storm?+
1 individual hail observations were recorded in Adams County on July 14, 2011, between approximately 9:40 PM MDT and 9:40 PM MDT. Each NOAA record represents either a ground-verified observation by a National Weather Service spotter or a radar-derived measurement.
Can I file an insurance claim for hail damage from this storm?+
Most homeowner's insurance policies in Colorado cover hail damage under the "wind and hail" peril. Standard policies require claims to be filed within 1-2 years of the date of loss, though this varies by carrier. The July 14, 2011 date is the NOAA-recorded date of loss for properties in Adams County. If your roof shows damage and your address was in the storm path, scheduling a free professional inspection is the standard first step.
How accurate is NOAA's hail size measurement?+
NOAA combines ground-verified reports (physically observed and measured hailstones reported by trained spotters, NWS offices, or law enforcement) with NEXRAD radar-derived size estimates. Ground reports are the gold standard. Radar estimates are a class rather than a measurement: MESH is tuned so that roughly 75% of measured hail comes in at or below the estimate — a bias, not a symmetric error bar. Each event in NOAA's Storm Events Database has a unique event ID that adjusters can independently verify.
Was my property in the storm path?+
The storm map above shows the location of each individual hail event in this storm. Enter your address in the HailScore lookup tool for a property-level report that checks all four NOAA publishers (Storm Events, NEXRAD radar, MRMS, CoCoRaHS) against your exact coordinates.