Severe Thunderstorm Warning Issued for Northeastern Colorado
This alert is no longer in effect.
NOAA issued it on June 18, 2026, 2 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Denver has issued a Severe Thunderstorm Warning for eastern Adams, eastern Arapahoe, and west central Washington counties until 4:00 PM MDT.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Northeastern Colorado
- Issued
- June 18, 2026
- Issuing authority
- NWS Denver CO
Storm notices can cover different combinations of wind, hail, lightning, and rainfall. Use the original notice for the hazards and boundaries attached to this specific record.
Record status: historical. It was issued 2 months ago; use the issuing agency's live warning service for current conditions in Northeastern Colorado.
Alert Details
A Severe Thunderstorm Warning was issued by the National Weather Service Denver CO on June 1 at 3:13 PM MDT. The alert is effective from 3:13 PM MDT until 4:00 PM MDT.
Affected Areas
The warning covers Eastern Adams County, Eastern Arapahoe County, and West Central Washington County in northeastern Colorado. Locations impacted include Shamrock, Last Chance, Woodlin School, and Leader.
What You Should Do
Anyone outdoors should move to shelter inside a well-built structure and stay away from windows. Do not drive your vehicle through flooded roadways.
Expected Conditions
At 3:13 PM MDT, a severe thunderstorm was located 6 miles south of Shamrock, or 31 miles south of Fort Morgan, moving northeast at 5 mph. The storm is capable of producing golf ball size hail (1.75 inches) and wind gusts up to 50 mph. Heavy rain is occurring and may lead to flooding.
Timeline
The warning is in effect from June 1 at 3:13 PM MDT until June 1 at 4:00 PM MDT.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (983 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to June 18, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.