Alert archive / Colorado / Winter Storm Warnings in 2025

Winter Storm Warning 3, NWS Denver/Boulder, CO

February 16, 20259 counties in Colorado

NWS Denver/Boulder, CO issued this winter storm warning at Feb 16, 2025, 2:22 AM MST for 9 counties in Colorado. It took effect at Feb 16, 2025, 2:00 PM MST. It was in force for 39 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 16, 2025, 2:22 AM MST (09:22 UTC)
In effect from: Feb 16, 2025, 2:00 PM MST
Expired: Feb 18, 2025, 5:00 AM MST
In force: 39 hr
Issued by: NWS Denver/Boulder, CO

Counties Boulder County, CO, Clear Creek County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO

The radar

The Denver radar (KFTG), 102 km from the middle of the area, began a volume at 09:22 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

Riverton, WY (KRIW), launched 00:00Z, 9.4 hours before the alert went out and 414 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 941 m above ground
0-6 km bulk shear: 112 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 334 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter storm 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 winter storm warning went out at Feb 15, 10:21 PM MST, 4 hours 1 minute earlier.

Area forecast discussion, Feb 15, 10:21 PM MST, 4 hours 1 minute before

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Hazardous weather outlook, Feb 15, 11:16 AM MST, 15 hours 6 minutes before

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In the hours before

Local storm report, Feb 15, 9:30 PM MST, 4 hours 52 minutes before

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Local storm report, Feb 16, 2:03 AM MST, 19 minutes before

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Local storm report, Feb 16, 2:04 AM MST, 18 minutes before

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Local storm report, Feb 16, 2:07 AM MST, 15 minutes before

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Local storm report, Feb 16, 2:08 AM MST, 14 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
Feb 16, 1:41 AM MST	Dense Fog Advisory	BOU	Weld	6 hr
Feb 16, 2:22 AM MST	Winter Weather Advisory	BOU	Boulder, Clear Creek, Gilpin, Grand, Jefferson, Park and 1 more	51 hr
Feb 16, 2:05 PM MST	Extreme Cold Watch	BOU	Logan, Phillips, Sedgwick, Washington	13 hr

Nearby

Winter Storm Warnings in Colorado, 2025 Every winter storm 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.