Planet Briefing

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Severe Thunderstorm Warning issued September 18 at 5:43PM MDT until September 18 at 6:15PM MDT by NWS Grand Junction CO

The National Weather Service (NWS) Grand Junction issued a Severe Thunderstorm Warning on 2026-09-18 at 5:43PM MDT, valid until 6:15PM MDT, for the Grand Junction, Colorado area.

Categories: severe-weather-and-natural-disasters, travel-and-transportation

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence
9/10
Geographic reach
3/10
Global importance
7/10
Impact magnitude
4/10
Positivity
2/10
Urgency
9/10

Why it matters

An active severe thunderstorm warning indicates hazardous weather is imminent for the Grand Junction area during the warning period and may threaten people, property, and local travel.

Location

Sources

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