Alert archive / Colorado / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 210, NWS Denver/Boulder, CO

July 10, 2025Adams County, Arapahoe County, Denver County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 10, 2025, 2:28 PM MDT for Adams County, Arapahoe County, Denver County, Colorado. It was in force for 47 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 10, 2025, 2:28 PM MDT (20:28 UTC)
Expired: Jul 10, 2025, 3:15 PM MDT
In force: 47 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 0.0 in
Wind: 60.0 mph

Counties Adams County, CO, Arapahoe County, CO, Denver County, CO

The radar

The Denver radar (KFTG), 4 km from the middle of the area, began a volume at 20:30 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 12:00Z, 8.5 hours before the alert went out and 457 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: 293 J/kg
Mixed-layer CIN: -342 J/kg
Mixed-layer LCL: 2106 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 10, 12:55 PM MDT, 1 hour 33 minutes earlier.

Area forecast discussion, Jul 10, 12:55 PM MDT, 1 hour 33 minutes before

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Hazardous weather outlook, Jul 10, 11:52 AM MDT, 2 hours 36 minutes before

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In the hours before

Special weather statement, Jul 10, 1:14 PM MDT, 1 hour 14 minutes before

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Special weather statement, Jul 10, 1:32 PM MDT, 56 minutes before

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Special weather statement, Jul 10, 1:42 PM MDT, 46 minutes before

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Local storm report, Jul 10, 1:54 PM MDT, 34 minutes before

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Special weather statement, Jul 10, 2:03 PM MDT, 25 minutes before

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Special weather statement, Jul 10, 2:12 PM MDT, 16 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
Jul 9, 7:01 PM MDT	Special Weather Statement	BOU	Broomfield	29 min
Jul 9, 7:27 PM MDT	Special Weather Statement	BOU	Broomfield	48 min
Jul 10, 1:36 AM MDT	Red Flag Warning	BOU	Park	18 hr
Jul 10, 4:06 AM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver	24 min
Jul 10, 11:59 AM MDT	Special Weather Statement	BOU	Arapahoe	31 min
Jul 10, 12:43 PM MDT	Special Weather Statement	BOU	Douglas	32 min
Jul 10, 12:45 PM MDT	Special Weather Statement	BOU	Denver	30 min
Jul 10, 1:14 PM MDT	Special Weather Statement	BOU	Arapahoe	31 min
Jul 10, 1:32 PM MDT	Special Weather Statement	BOU	Broomfield, Gilpin, Jefferson	28 min
Jul 10, 1:42 PM MDT	Special Weather Statement	BOU	Elbert	33 min
Jul 10, 1:51 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Boulder, Broomfield, Denver, Jefferson	39 min
Jul 10, 2:03 PM MDT	Special Weather Statement	BOU	Elbert	42 min
Jul 10, 2:12 PM MDT	Special Weather Statement	BOU	Lincoln	48 min
Jul 10, 3:00 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Elbert	45 min
Jul 10, 4:06 PM MDT	Special Weather Statement	BOU	Logan	24 min
Jul 10, 4:08 PM MDT	Special Weather Statement	BOU	Lincoln	52 min
Jul 10, 4:17 PM MDT	Special Weather Statement	BOU	Weld	28 min
Jul 10, 4:54 PM MDT	Special Weather Statement	BOU	Weld	51 min
Jul 10, 4:56 PM MDT	Severe Thunderstorm Warning	BOU	Weld	34 min
Jul 10, 5:27 PM MDT	Special Weather Statement	BOU	Morgan	33 min
Jul 10, 5:47 PM MDT	Special Weather Statement	BOU	Washington	28 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2025 Every 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.