Alert archive / Colorado / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 241, NWS Denver/Boulder, CO

July 8, 2026Washington County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 8, 2026, 7:07 PM MDT for Washington County, Colorado. It was in force for 38 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: Jul 8, 2026, 7:07 PM MDT (01:07 UTC)
Expired: Jul 8, 2026, 7:45 PM MDT
In force: 38 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

County Washington County, CO

The radar

The Denver radar (KFTG), 117 km from the middle of the area, began a volume at 01:10 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 8, 1:27 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.1 hours before the alert went out and 255 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: 1735 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1985 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.1

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.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 8, 5:48 PM MDT, 1 hour 19 minutes earlier.

Area forecast discussion, Jul 8, 5:48 PM MDT, 1 hour 19 minutes before

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In the hours before

Special weather statement, Jul 8, 4:01 PM MDT, 3 hours 6 minutes before

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Special weather statement, Jul 8, 4:09 PM MDT, 2 hours 58 minutes before

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Special weather statement, Jul 8, 4:11 PM MDT, 2 hours 56 minutes before

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Local storm report, Jul 8, 4:53 PM MDT, 2 hours 14 minutes before

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Local storm report, Jul 8, 5:38 PM MDT, 1 hour 29 minutes before

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Local storm report, Jul 8, 5:40 PM MDT, 1 hour 27 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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
Jul 8, 6:05 PM MDT	Special Weather Statement	BOU	Washington	40 min
Jul 8, 6:22 PM MDT	Severe Thunderstorm Warning	BOU	Washington	38 min
Jul 8, 6:26 PM MDT	Areal Flood Advisory	BOU	Adams, Arapahoe	2 hr
Jul 8, 6:59 PM MDT	Special Weather Statement	BOU	Washington	31 min
Jul 8, 10:49 PM MDT	Special Weather Statement	BOU	Sedgwick	26 min
Jul 9, 2:21 PM MDT	Special Weather Statement	BOU	Boulder	24 min
Jul 9, 2:30 PM MDT	Special Weather Statement	BOU	Gilpin	45 min
Jul 9, 2:56 PM MDT	Special Weather Statement	BOU	Weld	34 min
Jul 9, 2:59 PM MDT	Special Weather Statement	BOU	Denver	31 min
Jul 9, 3:18 PM MDT	Special Weather Statement	BOU	Broomfield	27 min
Jul 9, 3:40 PM MDT	Special Weather Statement	BOU	Denver	50 min
Jul 9, 3:45 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver, Weld	45 min
Jul 9, 3:53 PM MDT	Special Weather Statement	BOU	Weld	37 min
Jul 9, 4:05 PM MDT	Special Weather Statement	BOU	Arapahoe	40 min
Jul 9, 4:10 PM MDT	Special Weather Statement	BOU	Lincoln	50 min
Jul 9, 4:37 PM MDT	Special Weather Statement	BOU	Logan	38 min
Jul 9, 4:43 PM MDT	Special Weather Statement	BOU	Lincoln	47 min
Jul 9, 4:54 PM MDT	Severe Thunderstorm Warning	BOU	Logan	36 min
Jul 9, 5:23 PM MDT	Special Weather Statement	BOU	Morgan	52 min
Jul 9, 5:26 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan, Washington	34 min
Jul 9, 5:32 PM MDT	Special Weather Statement	BOU	Logan	43 min
Jul 9, 5:41 PM MDT	Special Weather Statement	BOU	Washington	49 min
Jul 9, 5:44 PM MDT	Severe Thunderstorm Warning	BOU	Washington	31 min
Jul 9, 5:48 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Washington	42 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.