First published 9/18/2026, 10:59:15 PM · Last updated 9/18/2026, 10:59:15 PM

Severe Thunderstorm Warning — NWS Grand Junction, CO

The National Weather Service (NWS) office in Grand Junction, Colorado issued a Severe Thunderstorm Warning on 2026-09-18 at 4:41 PM MDT, effective until 5:15 PM MDT for the Grand Junction area. The warning indicates imminent hazardous convective weather for the warning area during the stated period.

Categories: severe-weather-and-natural-disasters

Generated scores

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

Confidence: 9/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 3/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 6/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 4/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Positivity: 2/10How harmful or beneficial the event is, from strongly harmful (1) to strongly positive (10).
Urgency: 9/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Why it matters

Active severe thunderstorm warnings signal immediate risk to people, property, and local travel; affected residents and travelers should take protective actions and expect possible localized damage, lightning, and disruption until the warning expires.

Location

Sources

Severe Thunderstorm Warning issued September 18 at 4:41PM MDT until September 18 at 5:15PM MDT by NWS Grand Junction CO

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