Preliminary radar record — NOAA MRMS

July 29, 2026 Boulder County, CO Hailstorm

647 radar cells recorded on July 29, 2026. Peak radar-estimated hail size: 2.46".

Preliminary radar record. Built from NOAA MRMS radar (MESH), which updates within about 2 hours of a storm. Radar-estimated sizes carry roughly a ±0.25″ margin versus ground measurements. Ground-verified NOAA Storm Events records for this date typically publish 2–4 months later — this page upgrades to them automatically. Data current as of August 1, 2026.
Peak hail
2.46"
Radar cells
647
County
Boulder
Severity
Severe
Storm record — cite this

On July 29, 2026, NOAA MRMS radar detected radar-estimated hail up to 2.46" in Boulder County, Colorado — 647 radar cells on July 29, 2026. Source: NOAA Multi-Radar/Multi-Sensor (MRMS) MESH, via HailScore. Data current as of August 1, 2026.

Boulder County has 41 NOAA-verified hail days on record since 2015. The largest measured 3".

For scale, the biggest on record: June 19, 20183" hail (NOAA ground-verified).

Storm map

Each pin marks one MRMS radar cell with radar-estimated hail ≥1″. Larger pins = larger estimated hail.

Source: NOAA Multi-Radar/Multi-Sensor (MRMS) MESH. Coordinates are radar-grid cell centers — preliminary, not ground-verified.

Was your property in this storm's path?

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Cities in Boulder County affected

See the full hail history for each affected area:

Hail size distribution

Under 1"
0

Cosmetic damage potential

1" – 1.5"
372

Damages asphalt shingles

1.5" – 2"
187

Severe roof damage

2"+
88

Total roof replacement

Individual radar cells (preliminary)

Radar-estimated MESH readings from NOAA MRMS. Official NOAA event IDs publish with the verified Storm Events records (typically 2–4 months later).

Radar snapshot (MT)Est. hail sizeLocationRecord
11:30 AM MDT2.46"13 miles NW of Longmont40.245, -105.335MRMS radar cell
1:00 PM MDT2.46"13 miles NW of Longmont40.245, -105.335MRMS radar cell
8:00 AM MDT2.46"13 miles NW of Longmont40.245, -105.335MRMS radar cell
1:30 PM MDT2.46"13 miles NW of Longmont40.245, -105.335MRMS radar cell
4:30 AM MDT2.46"13 miles NW of Longmont40.245, -105.335MRMS radar cell
1:30 AM MDT2.46"13 miles NW of Longmont40.245, -105.335MRMS radar cell
12:30 AM MDT2.46"13 miles NW of Longmont40.245, -105.335MRMS radar cell
7:30 AM MDT2.46"13 miles NW of Longmont40.245, -105.335MRMS radar cell
9:30 AM MDT2.46"13 miles NW of Longmont40.245, -105.335MRMS radar cell
11:00 AM MDT2.46"13 miles NW of Longmont40.245, -105.335MRMS radar cell
3:30 AM MDT2.46"13 miles NW of Longmont40.245, -105.335MRMS radar cell
11:30 AM MDT2.37"14 miles NW of Longmont40.245, -105.345MRMS radar cell
7:30 AM MDT2.37"14 miles NW of Longmont40.245, -105.345MRMS radar cell
11:00 AM MDT2.37"14 miles NW of Longmont40.245, -105.345MRMS radar cell
1:30 PM MDT2.37"14 miles NW of Longmont40.245, -105.345MRMS radar cell
8:00 AM MDT2.37"14 miles NW of Longmont40.245, -105.345MRMS radar cell
3:30 AM MDT2.37"14 miles NW of Longmont40.245, -105.345MRMS radar cell
12:30 AM MDT2.37"14 miles NW of Longmont40.245, -105.345MRMS radar cell
1:00 PM MDT2.37"14 miles NW of Longmont40.245, -105.345MRMS radar cell
4:30 AM MDT2.37"14 miles NW of Longmont40.245, -105.345MRMS radar cell
1:30 AM MDT2.37"14 miles NW of Longmont40.245, -105.345MRMS radar cell
9:30 AM MDT2.37"14 miles NW of Longmont40.245, -105.345MRMS radar cell
7:30 AM MDT2.3"13 miles NW of Longmont40.255, -105.315MRMS radar cell
9:30 AM MDT2.3"13 miles NW of Longmont40.255, -105.315MRMS radar cell
1:30 PM MDT2.3"13 miles NW of Longmont40.255, -105.315MRMS radar cell
11:30 AM MDT2.3"13 miles NW of Longmont40.255, -105.315MRMS radar cell
8:00 AM MDT2.3"13 miles NW of Longmont40.255, -105.315MRMS radar cell
3:30 AM MDT2.3"13 miles NW of Longmont40.255, -105.315MRMS radar cell
12:30 AM MDT2.3"13 miles NW of Longmont40.255, -105.315MRMS radar cell
1:00 PM MDT2.3"13 miles NW of Longmont40.255, -105.315MRMS radar cell
11:00 AM MDT2.3"13 miles NW of Longmont40.255, -105.315MRMS radar cell
1:30 AM MDT2.3"13 miles NW of Longmont40.255, -105.315MRMS radar cell
4:30 AM MDT2.3"13 miles NW of Longmont40.255, -105.315MRMS radar cell
8:00 AM MDT2.26"13 miles NW of Longmont40.245, -105.325MRMS radar cell
9:30 AM MDT2.26"13 miles NW of Longmont40.245, -105.325MRMS radar cell
7:30 AM MDT2.26"13 miles NW of Longmont40.245, -105.325MRMS radar cell
1:30 AM MDT2.26"13 miles NW of Longmont40.245, -105.325MRMS radar cell
4:30 AM MDT2.26"13 miles NW of Longmont40.245, -105.325MRMS radar cell
1:30 PM MDT2.26"13 miles NW of Longmont40.245, -105.325MRMS radar cell
11:00 AM MDT2.26"13 miles NW of Longmont40.245, -105.325MRMS radar cell
3:30 AM MDT2.26"13 miles NW of Longmont40.245, -105.325MRMS radar cell
11:30 AM MDT2.26"13 miles NW of Longmont40.245, -105.325MRMS radar cell
12:30 AM MDT2.26"13 miles NW of Longmont40.245, -105.325MRMS radar cell
1:00 PM MDT2.26"13 miles NW of Longmont40.245, -105.325MRMS radar cell
7:30 AM MDT2.14"13 miles NW of Longmont40.255, -105.325MRMS radar cell
11:30 AM MDT2.14"13 miles NW of Longmont40.255, -105.325MRMS radar cell
8:00 AM MDT2.14"13 miles NW of Longmont40.255, -105.325MRMS radar cell
12:30 AM MDT2.14"13 miles NW of Longmont40.255, -105.325MRMS radar cell
1:30 PM MDT2.14"13 miles NW of Longmont40.255, -105.325MRMS radar cell
9:30 AM MDT2.14"13 miles NW of Longmont40.255, -105.325MRMS radar cell

Showing first 50 of 647 records.

Frequently asked questions

What is the largest hail recorded on July 29, 2026 in Boulder County so far?+

NOAA's MRMS radar network detected radar-estimated hail up to 2.46" in Boulder County, Colorado on July 29, 2026. This is a preliminary, radar-estimated figure (MESH — Maximum Estimated Size of Hail), not a ground-verified measurement. Ground-verified NOAA Storm Events records for this date typically publish 2-4 months later, and this page upgrades to them automatically.

Is this storm record final?+

No — this is a preliminary radar record, current as of August 1, 2026. It is built from NOAA MRMS radar data, which updates continuously (typically within about 2 hours of a storm). The verified NOAA Storm Events Database entry for this date, with ground-truthed observations and official event IDs, usually publishes 2-4 months after the storm. Radar-estimated sizes carry roughly a ±0.25 inch margin versus ground measurements.

Was my property in the storm area?+

The map above shows each radar cell where MRMS estimated hail of 1 inch or larger. Enter your address in the free HailScore lookup for a property-level check of the radar record against your exact coordinates — no signup required.

Can I use this preliminary record for an insurance claim?+

The radar record can help you and your adjuster establish that hail was detected near your property on July 29, 2026 — it is the same NOAA MRMS data source many industry tools use. For the date of loss itself, adjusters typically also reference the ground-verified NOAA Storm Events entry once it publishes. A professional roof inspection remains the standard first step for documenting actual damage.