Alert archive / Colorado / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 72, NWS Denver/Boulder, CO

June 1, 2025Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 1, 2025, 5:05 PM MDT for Weld County, Colorado. It was in force for 40 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 1, 2025, 5:05 PM MDT (23:05 UTC)
Expired
Jun 1, 2025, 5:45 PM MDT
In force
40 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Weld County, CO

The radar

The Cheyenne radar (KCYS), 75 km from the middle of the area, began a volume at 23:06 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

Grand Junction, CO (KGJT), launched 12:00Z, 11.1 hours before the alert went out and 385 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, Grand Junction, CO at 12:00Z on 2025-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Grand Junction, CO at 12:00Z on 2025-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3248 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
47 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 1, 1:38 PM MDTSpecial Weather StatementBOUDouglas37 min
Jun 1, 2:50 PM MDTSpecial Weather StatementBOULarimer25 min
Jun 1, 3:08 PM MDTAreal Flood AdvisoryBOULarimer2 hr
Jun 1, 3:15 PM MDTSpecial Weather StatementBOUGilpin30 min
Jun 1, 3:37 PM MDTAreal Flood AdvisoryBOUBoulder, Gilpin113 min
Jun 1, 3:54 PM MDTSpecial Weather StatementBOULarimer36 min
Jun 1, 3:59 PM MDTSpecial Weather StatementBOUJefferson31 min
Jun 1, 4:19 PM MDTAreal Flood AdvisoryBOULarimer116 min
Jun 1, 4:32 PM MDTSpecial Weather StatementBOUDenver43 min
Jun 1, 4:36 PM MDTSpecial Weather StatementBOUWeld24 min
Jun 1, 4:38 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Denver, Jefferson37 min
Jun 1, 4:57 PM MDTSevere Thunderstorm WarningBOUAdams, Denver33 min
Jun 1, 5:01 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Denver29 min
Jun 1, 5:28 PM MDTSevere Thunderstorm WarningBOUAdams, Weld23 min
Jun 1, 5:43 PM MDTSpecial Weather StatementBOUWeld32 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2025Every severe thunderstorm warning in 2025

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.