Alert archive / Colorado / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 149, NWS Denver/Boulder, CO

June 23, 20264 counties in Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 23, 2026, 10:39 PM MDT for 4 counties in Colorado. It was in force for 42 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
Jun 23, 2026, 10:39 PM MDT (04:39 UTC)
Expired
Jun 23, 2026, 11:21 PM MDT
In force
42 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Arapahoe County, CO, Elbert County, CO, Lincoln County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 73 km from the middle of the area, began a volume at 04:40 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.

IssuedProductOfficeLasted
Jun 23, 4:39 PM MDTSevere Thunderstorm WatchSPC10 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.7 hours before the alert went out and 328 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2026-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 720 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2026-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
720 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1189 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.3

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 Jun 23, 5:55 PM MDT, 4 hours 44 minutes earlier.

Area forecast discussion, Jun 23, 5:55 PM MDT, 4 hours 44 minutes before
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In the hours before

Local storm report, Jun 23, 8:55 PM MDT, 1 hour 44 minutes before
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Local storm report, Jun 23, 9:09 PM MDT, 1 hour 30 minutes before
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Local storm report, Jun 23, 9:14 PM MDT, 1 hour 25 minutes before
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Local storm report, Jun 23, 9:17 PM MDT, 1 hour 22 minutes before
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Local storm report, Jun 23, 9:41 PM MDT, 58 minutes before
Preliminary Local Storm Report
National Weather Service Denver CO
941 PM MDT Tue Jun 23 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0925 PM     Hail             1 SSW Wiggins           40.21N 104.08W
06/23/2026  E1.75 Inch       Morgan             CO   Law Enforcement

            Vehicle and camper destroyed by large hail
            in the Kiowa Park Subdivision.

&&
Local storm report, Jun 23, 10:25 PM MDT, 14 minutes before
Preliminary Local Storm Report
National Weather Service Denver CO
1025 PM MDT Tue Jun 23 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1025 PM     Tstm Wnd Gst     2 NNW Wiggins           40.25N 104.08W
06/23/2026  M58 MPH          Morgan             CO   Mesonet

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 23, 6:09 PM MDTSevere Thunderstorm WarningBOUWashington22 min
Jun 23, 6:19 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert, Lincoln41 min
Jun 23, 6:51 PM MDTSevere Thunderstorm Warning Considerable damage threatBOUArapahoe, Elbert, Lincoln, Washington38 min
Jun 23, 7:12 PM MDTSevere Thunderstorm Warning Considerable damage threatBOUWashington18 min
Jun 23, 7:29 PM MDTSevere Thunderstorm Warning Considerable damage threatBOUWashington27 min
Jun 23, 8:31 PM MDTSevere Thunderstorm Warning Considerable damage threatBOUMorgan, Weld44 min
Jun 23, 8:34 PM MDTSevere Thunderstorm WarningBOUElbert41 min
Jun 23, 8:45 PM MDTSevere Thunderstorm WarningBOUMorgan, Washington25 min
Jun 23, 8:52 PM MDTSevere Thunderstorm Warning Destructive damage threatBOUMorgan38 min
Jun 23, 8:58 PM MDTSevere Thunderstorm Warning Destructive damage threatBOUMorgan, Weld47 min
Jun 23, 9:02 PM MDTSevere Thunderstorm WarningBOUElbert43 min
Jun 23, 9:16 PM MDTSevere Thunderstorm Warning Considerable damage threatBOUMorgan32 min
Jun 23, 9:37 PM MDTSevere Thunderstorm WarningBOUMorgan, Weld25 min
Jun 23, 9:38 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln9 min
Jun 23, 9:42 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln17 min
Jun 23, 9:46 PM MDTSevere Thunderstorm WarningBOUPhillips44 min
Jun 23, 10:05 PM MDTSevere Thunderstorm WarningBOUPhillips, Sedgwick25 min
Jun 23, 10:27 PM MDTSevere Thunderstorm WarningBOUPhillips23 min
Jun 23, 11:48 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln27 min
Jun 23, 11:59 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln46 min
Jun 24, 12:26 AM MDTSevere Thunderstorm WarningBOUElbert, Lincoln31 min
Jun 24, 12:40 AM MDTSevere Thunderstorm WarningBOUElbert25 min
Jun 24, 12:42 AM MDTSevere Thunderstorm WarningBOULincoln48 min
Jun 24, 12:47 AM MDTSevere Thunderstorm WarningBOUElbert, Lincoln43 min
Jun 24, 1:02 AM MDTFlash Flood WarningBOULincoln3 hr
Jun 24, 1:21 AM MDTSevere Thunderstorm WarningBOULogan, Morgan, Weld39 min
Jun 24, 1:22 AM MDTFlash Flood WarningBOUArapahoe, Elbert, Lincoln3 hr
Jun 24, 3:21 PM MDTSevere Thunderstorm Warning Considerable damage threatBOUMorgan, Weld39 min
Jun 24, 3:38 PM MDTSevere Thunderstorm Warning Destructive damage threatBOUMorgan, Weld33 min
Jun 24, 3:46 PM MDTSpecial Weather StatementBOUAdams44 min
Jun 24, 3:59 PM MDTSevere Thunderstorm WarningBOULogan, Morgan, Washington46 min
Jun 24, 4:06 PM MDTSevere Thunderstorm Warning Destructive damage threatBOUMorgan21 min
Jun 24, 4:21 PM MDTTornado WarningBOULogan, Morgan, Washington39 min
Jun 24, 4:26 PM MDTTornado WarningBOUMorgan34 min
Jun 24, 4:52 PM MDTSevere Thunderstorm WarningBOUMorgan, Washington38 min
Jun 24, 4:55 PM MDTSevere Thunderstorm Warning Considerable damage threatBOUWashington35 min
Jun 24, 5:15 PM MDTSevere Thunderstorm WarningBOUWashington45 min
Jun 24, 5:38 PM MDTSevere Thunderstorm WarningBOULogan, Sedgwick24 min
Jun 24, 5:42 PM MDTSevere Thunderstorm WarningBOUWashington33 min
Jun 24, 5:48 PM MDTTornado WarningBOULogan42 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2026Every 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.