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".
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, 2018 — 3" 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.
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Cities in Boulder County affected
See the full hail history for each affected area:
Hail size distribution
Cosmetic damage potential
Damages asphalt shingles
Severe roof damage
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 size | Location | Record |
|---|---|---|---|
| 11:30 AM MDT | 2.46" | 13 miles NW of Longmont40.245, -105.335 | MRMS radar cell |
| 1:00 PM MDT | 2.46" | 13 miles NW of Longmont40.245, -105.335 | MRMS radar cell |
| 8:00 AM MDT | 2.46" | 13 miles NW of Longmont40.245, -105.335 | MRMS radar cell |
| 1:30 PM MDT | 2.46" | 13 miles NW of Longmont40.245, -105.335 | MRMS radar cell |
| 4:30 AM MDT | 2.46" | 13 miles NW of Longmont40.245, -105.335 | MRMS radar cell |
| 1:30 AM MDT | 2.46" | 13 miles NW of Longmont40.245, -105.335 | MRMS radar cell |
| 12:30 AM MDT | 2.46" | 13 miles NW of Longmont40.245, -105.335 | MRMS radar cell |
| 7:30 AM MDT | 2.46" | 13 miles NW of Longmont40.245, -105.335 | MRMS radar cell |
| 9:30 AM MDT | 2.46" | 13 miles NW of Longmont40.245, -105.335 | MRMS radar cell |
| 11:00 AM MDT | 2.46" | 13 miles NW of Longmont40.245, -105.335 | MRMS radar cell |
| 3:30 AM MDT | 2.46" | 13 miles NW of Longmont40.245, -105.335 | MRMS radar cell |
| 11:30 AM MDT | 2.37" | 14 miles NW of Longmont40.245, -105.345 | MRMS radar cell |
| 7:30 AM MDT | 2.37" | 14 miles NW of Longmont40.245, -105.345 | MRMS radar cell |
| 11:00 AM MDT | 2.37" | 14 miles NW of Longmont40.245, -105.345 | MRMS radar cell |
| 1:30 PM MDT | 2.37" | 14 miles NW of Longmont40.245, -105.345 | MRMS radar cell |
| 8:00 AM MDT | 2.37" | 14 miles NW of Longmont40.245, -105.345 | MRMS radar cell |
| 3:30 AM MDT | 2.37" | 14 miles NW of Longmont40.245, -105.345 | MRMS radar cell |
| 12:30 AM MDT | 2.37" | 14 miles NW of Longmont40.245, -105.345 | MRMS radar cell |
| 1:00 PM MDT | 2.37" | 14 miles NW of Longmont40.245, -105.345 | MRMS radar cell |
| 4:30 AM MDT | 2.37" | 14 miles NW of Longmont40.245, -105.345 | MRMS radar cell |
| 1:30 AM MDT | 2.37" | 14 miles NW of Longmont40.245, -105.345 | MRMS radar cell |
| 9:30 AM MDT | 2.37" | 14 miles NW of Longmont40.245, -105.345 | MRMS radar cell |
| 7:30 AM MDT | 2.3" | 13 miles NW of Longmont40.255, -105.315 | MRMS radar cell |
| 9:30 AM MDT | 2.3" | 13 miles NW of Longmont40.255, -105.315 | MRMS radar cell |
| 1:30 PM MDT | 2.3" | 13 miles NW of Longmont40.255, -105.315 | MRMS radar cell |
| 11:30 AM MDT | 2.3" | 13 miles NW of Longmont40.255, -105.315 | MRMS radar cell |
| 8:00 AM MDT | 2.3" | 13 miles NW of Longmont40.255, -105.315 | MRMS radar cell |
| 3:30 AM MDT | 2.3" | 13 miles NW of Longmont40.255, -105.315 | MRMS radar cell |
| 12:30 AM MDT | 2.3" | 13 miles NW of Longmont40.255, -105.315 | MRMS radar cell |
| 1:00 PM MDT | 2.3" | 13 miles NW of Longmont40.255, -105.315 | MRMS radar cell |
| 11:00 AM MDT | 2.3" | 13 miles NW of Longmont40.255, -105.315 | MRMS radar cell |
| 1:30 AM MDT | 2.3" | 13 miles NW of Longmont40.255, -105.315 | MRMS radar cell |
| 4:30 AM MDT | 2.3" | 13 miles NW of Longmont40.255, -105.315 | MRMS radar cell |
| 8:00 AM MDT | 2.26" | 13 miles NW of Longmont40.245, -105.325 | MRMS radar cell |
| 9:30 AM MDT | 2.26" | 13 miles NW of Longmont40.245, -105.325 | MRMS radar cell |
| 7:30 AM MDT | 2.26" | 13 miles NW of Longmont40.245, -105.325 | MRMS radar cell |
| 1:30 AM MDT | 2.26" | 13 miles NW of Longmont40.245, -105.325 | MRMS radar cell |
| 4:30 AM MDT | 2.26" | 13 miles NW of Longmont40.245, -105.325 | MRMS radar cell |
| 1:30 PM MDT | 2.26" | 13 miles NW of Longmont40.245, -105.325 | MRMS radar cell |
| 11:00 AM MDT | 2.26" | 13 miles NW of Longmont40.245, -105.325 | MRMS radar cell |
| 3:30 AM MDT | 2.26" | 13 miles NW of Longmont40.245, -105.325 | MRMS radar cell |
| 11:30 AM MDT | 2.26" | 13 miles NW of Longmont40.245, -105.325 | MRMS radar cell |
| 12:30 AM MDT | 2.26" | 13 miles NW of Longmont40.245, -105.325 | MRMS radar cell |
| 1:00 PM MDT | 2.26" | 13 miles NW of Longmont40.245, -105.325 | MRMS radar cell |
| 7:30 AM MDT | 2.14" | 13 miles NW of Longmont40.255, -105.325 | MRMS radar cell |
| 11:30 AM MDT | 2.14" | 13 miles NW of Longmont40.255, -105.325 | MRMS radar cell |
| 8:00 AM MDT | 2.14" | 13 miles NW of Longmont40.255, -105.325 | MRMS radar cell |
| 12:30 AM MDT | 2.14" | 13 miles NW of Longmont40.255, -105.325 | MRMS radar cell |
| 1:30 PM MDT | 2.14" | 13 miles NW of Longmont40.255, -105.325 | MRMS radar cell |
| 9:30 AM MDT | 2.14" | 13 miles NW of Longmont40.255, -105.325 | MRMS 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.