Alert archive / Colorado / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 334, NWS Denver/Boulder, CO

August 18, 2026Elbert County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 18, 2026, 11:41 PM MDT for Elbert County, Colorado. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 18, 2026, 11:41 PM MDT (05:41 UTC)
Expired: Aug 19, 2026, 12:16 AM MDT
In force: 35 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Elbert County, CO

The radar

The Denver radar (KFTG), 66 km from the middle of the area, began a volume at 05:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 5.7 hours before the alert went out and 405 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 939 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 3354 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 18, 10:01 PM MDT, 1 hour 40 minutes before

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Special weather statement, Aug 18, 10:33 PM MDT, 1 hour 8 minutes before

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Special weather statement, Aug 18, 10:45 PM MDT, 56 minutes before

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Local storm report, Aug 18, 11:18 PM MDT, 23 minutes before

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The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 18, 10:01 PM MDT	Special Weather Statement	BOU	Weld	29 min
Aug 18, 10:33 PM MDT	Special Weather Statement	BOU	Morgan	42 min
Aug 18, 10:45 PM MDT	Special Weather Statement	BOU	Morgan	30 min
Aug 18, 10:51 PM MDT	Severe Thunderstorm Warning	BOU	Washington	39 min
Aug 19, 12:14 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Elbert, Lincoln	46 min
Aug 19, 12:42 AM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	23 min
Aug 19, 12:57 AM MDT	Severe Thunderstorm Warning	BOU	Lincoln	48 min
Aug 19, 3:02 AM MDT	Special Weather Statement	BOU	Lincoln	28 min
Aug 19, 6:13 AM MDT	Special Weather Statement	BOU	Elbert	32 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2026 Every severe thunderstorm warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.