This alert is in force until 2 September 2026, 20:30 UTC.
It is the 2nd strongest of the 32 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 1 September 2026.
What the source measured
NOAA reported: Flood Warning issued September 2 at 11:28AM MDT until September 2 at 2:30PM MDT by NWS Grand Junction CO
An estimated 80,247 people live within 50 km of this point.
Nearby, since 15 March 2026
- September 1, 2026 · score 32 · 16.3 km
- August 13, 2026 · score 39 · 18.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 32 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 32 / 100 |
| Our confidence | 81% |
| Coordinates | 39.2111, -108.7433 |
| Nearest City | Grand Junction (24 km) |
| Population Exposed | 80.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T17:28:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.36ab7c674d65e9c18d6ba099d79ad070c7a185dd.001.1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Mesa, CO |
| Headline | Flood Warning issued September 2 at 11:28AM MDT until September 2 at 2:30PM MDT by NWS Grand Junction CO |
| Expires | 2026-09-02T14:30:00-06:00 |
| SenderName | NWS Grand Junction CO |
| HasExactCoords | true |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens near Grand Junction?
Calamity.live data shows a weather event with CalamityScore 32/100, near Grand Junction (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.