Preliminary radar record — NOAA MRMS
August 13, 2026 Weld County, CO Hailstorm
48 radar cells recorded on August 13, 2026. Peak radar-estimated hail size: 2.84".
On August 13, 2026, NOAA MRMS radar detected radar-estimated hail up to 2.84" in Weld County, Colorado — 48 radar cells on August 13, 2026. Source: NOAA Multi-Radar/Multi-Sensor (MRMS) MESH, via HailScore. Cells still re-reporting the August 12, 2026 storm within MRMS's trailing 24-hour maximum are excluded, so a raw MRMS query for August 13, 2026 returns that earlier storm's larger reading. Data current as of August 21, 2026.
Weld County has 134 NOAA-verified hail days on record since 2015. The largest measured 4.25".
For scale, the biggest on record: June 12, 2017 — 4.25" hail (NOAA ground-verified).
Storm map
Colour shows radar-estimated hail size across the storm's footprint — the ≥1″ MRMS cells merged into continuous bands, keyed on the map. The callout marks the peak cell.
Zoom to street level with HailScore Pro
This is a radar footprint, not a canvassing list — it shows where hail was estimated, not which roofs were damaged.
See HailScore ProBands overlap and blend where sizes meet. Radar-estimated MESH ≥1″ · preliminary, ±0.25″ · not a damage outline
Source: NOAA Multi-Radar/Multi-Sensor (MRMS) MESH. Coordinates are radar-grid cell centers — preliminary, not ground-verified. Radar-estimated sizes carry roughly a ±0.25″ margin versus ground measurements.
Because each cell is padded before merging and small gaps between neighbouring cells are bridged, the shaded shape is larger than the cells actually measured and encloses pockets where the radar recorded nothing. Read it as the storm's approximate extent, not a cell-by-cell map: it is not a damage outline, not a claim that every roof inside it was hit, and not a circle drawn around an address. Whether a specific property was affected depends on its exact distance from the measured cells.
How the storm unfolded
NEXRAD radar tracked hail in Weld County from 7:52 PM to 9:31 PM MT, peaking at 3.5" around 7:45 PM across 34 radar scans.
Source: NOAA NEXRAD Level-III hail detection (SWDI nx3hail), 15-minute intervals, Mountain Time. Each bar is the largest radar-reported hail size in that interval.
Was your property in this storm's path?
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Hail history for cities in Weld 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 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 |
|---|---|---|---|
| 9:30 PM MDT | 2.84" | 5 miles NE of Windsor40.535, -104.845 | MRMS radar cell |
| 9:30 PM MDT | 2.57" | 4 miles NE of Windsor40.525, -104.845 | MRMS radar cell |
| 9:30 PM MDT | 2.52" | 4 miles NE of Windsor40.525, -104.855 | MRMS radar cell |
| 9:30 PM MDT | 2.41" | 5 miles NE of Windsor40.535, -104.855 | MRMS radar cell |
| 9:30 PM MDT | 2.41" | 5 miles NE of Windsor40.535, -104.835 | MRMS radar cell |
| 9:30 PM MDT | 1.92" | 5 miles NE of Windsor40.525, -104.835 | MRMS radar cell |
| 9:30 PM MDT | 1.56" | 6 miles NE of Windsor40.535, -104.825 | MRMS radar cell |
| 9:30 PM MDT | 1.44" | 6 miles NE of Windsor40.545, -104.845 | MRMS radar cell |
| 9:30 PM MDT | 1.43" | 6 miles NE of Windsor40.545, -104.835 | MRMS radar cell |
| 9:30 PM MDT | 1.38" | 56 miles NE of Kersey40.755, -103.625 | MRMS radar cell |
| 9:30 PM MDT | 1.36" | 48 miles NE of Kersey40.655, -103.715 | MRMS radar cell |
| 9:30 PM MDT | 1.34" | 57 miles NE of Kersey40.785, -103.605 | MRMS radar cell |
| 8:00 PM MDT | 1.29" | 4 miles NE of Windsor40.535, -104.865 | MRMS radar cell |
| 9:30 PM MDT | 1.28" | 5 miles NE of Windsor40.545, -104.855 | MRMS radar cell |
| 9:30 PM MDT | 1.28" | 57 miles NE of Kersey40.775, -103.615 | MRMS radar cell |
| 9:30 PM MDT | 1.28" | 49 miles NE of Kersey40.655, -103.705 | MRMS radar cell |
| 9:30 PM MDT | 1.24" | 57 miles NE of Kersey40.785, -103.615 | MRMS radar cell |
| 9:30 PM MDT | 1.21" | 5 miles NE of Windsor40.525, -104.825 | MRMS radar cell |
| 9:30 PM MDT | 1.2" | 58 miles NE of Kersey40.785, -103.595 | MRMS radar cell |
| 11:30 PM MDT | 1.18" | 57 miles NE of Ault40.965, -103.775 | MRMS radar cell |
| 8:00 PM MDT | 1.17" | in Windsor40.525, -104.865 | MRMS radar cell |
| 8:00 PM MDT | 1.16" | in Windsor40.515, -104.875 | MRMS radar cell |
| 9:30 PM MDT | 1.15" | 56 miles NE of Kersey40.765, -103.615 | MRMS radar cell |
| 8:00 PM MDT | 1.14" | in Windsor40.525, -104.875 | MRMS radar cell |
| 9:30 PM MDT | 1.14" | 51 miles NE of Kersey40.675, -103.675 | MRMS radar cell |
| 11:30 PM MDT | 1.13" | 56 miles NE of Ault40.945, -103.765 | MRMS radar cell |
| 9:30 PM MDT | 1.13" | 5 miles W of Eaton40.535, -104.815 | MRMS radar cell |
| 11:30 PM MDT | 1.12" | 56 miles NE of Ault40.955, -103.775 | MRMS radar cell |
| 9:30 PM MDT | 1.11" | 49 miles E of Kersey40.645, -103.705 | MRMS radar cell |
| 11:30 PM MDT | 1.11" | 56 miles NE of Ault40.945, -103.775 | MRMS radar cell |
| 9:30 PM MDT | 1.1" | 57 miles NE of Kersey40.765, -103.605 | MRMS radar cell |
| 11:30 PM MDT | 1.1" | 56 miles NE of Ault40.935, -103.775 | MRMS radar cell |
| 11:30 PM MDT | 1.1" | 56 miles NE of Ault40.945, -103.785 | MRMS radar cell |
| 9:30 PM MDT | 1.1" | in Windsor40.515, -104.865 | MRMS radar cell |
| 8:00 PM MDT | 1.09" | 4 miles N of Windsor40.535, -104.875 | MRMS radar cell |
| 9:30 PM MDT | 1.09" | 56 miles NE of Kersey40.755, -103.615 | MRMS radar cell |
| 9:30 PM MDT | 1.09" | 56 miles NE of Kersey40.765, -103.625 | MRMS radar cell |
| 9:30 PM MDT | 1.08" | 51 miles NE of Kersey40.685, -103.675 | MRMS radar cell |
| 8:00 PM MDT | 1.06" | 5 miles N of Windsor40.545, -104.875 | MRMS radar cell |
| 9:30 PM MDT | 1.05" | 56 miles NE of Kersey40.745, -103.615 | MRMS radar cell |
| 9:30 PM MDT | 1.05" | in Windsor40.515, -104.855 | MRMS radar cell |
| 9:30 PM MDT | 1.03" | 55 miles NE of Kersey40.755, -103.635 | MRMS radar cell |
| 9:30 PM MDT | 1.03" | 49 miles E of Kersey40.655, -103.695 | MRMS radar cell |
| 9:30 PM MDT | 1.02" | 57 miles NE of Kersey40.775, -103.605 | MRMS radar cell |
| 9:30 PM MDT | 1.02" | 48 miles NE of Kersey40.655, -103.725 | MRMS radar cell |
| 9:30 PM MDT | 1.01" | 58 miles NE of Kersey40.795, -103.605 | MRMS radar cell |
| 11:30 PM MDT | 1" | 55 miles NE of Ault40.945, -103.795 | MRMS radar cell |
| 11:30 PM MDT | 1" | 56 miles NE of Ault40.955, -103.785 | MRMS radar cell |
Frequently asked questions
What is the largest hail recorded on August 13, 2026 in Weld County so far?+
NOAA's MRMS radar network detected radar-estimated hail up to 2.84" in Weld County, Colorado on August 13, 2026. This is a preliminary, radar-estimated figure (MESH — Maximum Estimated Size of Hail), not a ground-verified measurement. Cells still re-reporting the August 12, 2026 storm within MRMS's trailing 24-hour maximum are excluded, so a raw MRMS query for August 13, 2026 returns that earlier storm's larger reading. 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 21, 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 shades the storm's radar footprint — the MRMS cells that estimated hail of 1 inch or larger, merged into colour-coded size bands. 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 August 13, 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.