First published 9/18/2026, 9:57:15 PM · Last updated 9/18/2026, 9:57:15 PM

Severe Thunderstorm Warning issued September 18 at 3:24PM MDT until September 18 at 4:00PM MDT by NWS Grand Junction CO

The National Weather Service (NWS) Grand Junction, CO issued a Severe Thunderstorm Warning on 2026-09-18 at 3:24 PM MDT, in effect until 4:00 PM MDT the same day. The warning indicates an ongoing or imminent severe thunderstorm threat for areas served by the NWS Grand Junction office.

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

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: 7/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 3/10The 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

Severe thunderstorms can produce damaging winds, large hail, heavy rain, and lightning, posing immediate risks to life, property, and transportation during the short warning period.

Location

Sources

Severe Thunderstorm Warning issued September 18 at 3:24PM MDT until September 18 at 4:00PM MDT by NWS Grand Junction CO

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