Alert archive / Colorado / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 197, NWS Denver/Boulder, CO

July 6, 2025Washington County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 6, 2025, 6:51 PM MDT for Washington County, Colorado. It was in force for 54 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 6, 2025, 6:51 PM MDT (00:51 UTC)
Expired: Jul 6, 2025, 7:45 PM MDT
In force: 54 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
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 00:54 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 6, 1:17 PM MDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 0.9 hours before the alert went out and 376 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: 1429 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1699 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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 6, 5:38 PM MDT, 1 hour 13 minutes earlier.

Area forecast discussion, Jul 6, 5:38 PM MDT, 1 hour 13 minutes before

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Hazardous weather outlook, Jul 6, 10:55 AM MDT, 7 hours 56 minutes before

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1055 AM MDT Sun Jul 6 2025

COZ030>051-071700-
Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/
Northwest Boulder Counties Above 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/
Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
1055 AM MDT Sun Jul 6 2025

This hazardous weather outlook is for northeast and north central
Colorado.

.DAY ONE...Today and Tonight

Scattered showers and thunderstorms will develop this afternoon
and evening. Some of these storms will be strong to severe over
the I-25 corridor and eastern plains with damaging wind gusts
that could exceed 60 mph and large hail in excess of 1 inch in
diameter.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Monday will continue to have scattered afternoon and evening
thunderstorms. Some of these storms will be strong to severe
across the eastern plains with large hail and damaging wind gusts
the primary threats. The highest threat for severe weather will be
across the northeast corner of Colorado where significant severe
storms with wind up to 80 mph and 2" diameter hail could occur.

Very hot temperatures near 100 degrees across the plains are
expected on Wednesday and Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed today or tonight to pass along
any severe hail or wind reports.

In the hours before

Special weather statement, Jul 6, 5:33 PM MDT, 1 hour 18 minutes before

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Special weather statement, Jul 6, 6:05 PM MDT, 46 minutes before

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Special weather statement, Jul 6, 6:12 PM MDT, 39 minutes before

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Special weather statement, Jul 6, 6:37 PM MDT, 14 minutes before

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Special weather statement, Jul 6, 6:44 PM MDT, 7 minutes before

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Local storm report, Jul 6, 6:47 PM MDT, 4 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 6, 6:05 PM MDT	Special Weather Statement	BOU	Logan, Morgan	55 min
Jul 6, 6:12 PM MDT	Special Weather Statement	BOU	Jefferson	48 min
Jul 6, 6:37 PM MDT	Special Weather Statement	BOU	Adams, Arapahoe	38 min
Jul 6, 6:44 PM MDT	Special Weather Statement	BOU	Denver	46 min
Jul 6, 7:05 PM MDT	Special Weather Statement	BOU	Lincoln	40 min
Jul 6, 8:19 PM MDT	Special Weather Statement	BOU	Teller	26 min
Jul 6, 8:30 PM MDT	Special Weather Statement	BOU	Washington	45 min
Jul 7, 12:58 PM MDT	Special Weather Statement	BOU	Douglas	32 min
Jul 7, 1:18 PM MDT	Special Weather Statement	BOU	Broomfield	42 min
Jul 7, 1:38 PM MDT	Special Weather Statement	BOU	Douglas	22 min
Jul 7, 1:39 PM MDT	Special Weather Statement	BOU	Elbert	36 min
Jul 7, 1:47 PM MDT	Special Weather Statement	BOU	Elbert	28 min
Jul 7, 1:51 PM MDT	Special Weather Statement	BOU	Weld	39 min
Jul 7, 2:17 PM MDT	Special Weather Statement	BOU	Arapahoe	43 min
Jul 7, 2:28 PM MDT	Heat Advisory	BOU	Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 3 more	55 hr
Jul 7, 2:40 PM MDT	Special Weather Statement	BOU	Morgan	50 min
Jul 7, 2:55 PM MDT	Special Weather Statement	BOU	Adams	35 min
Jul 7, 3:29 PM MDT	Special Weather Statement	BOU	Lincoln	46 min
Jul 7, 3:34 PM MDT	Special Weather Statement	BOU	Logan	41 min
Jul 7, 3:36 PM MDT	Special Weather Statement	BOU	Logan	39 min
Jul 7, 3:53 PM MDT	Special Weather Statement	BOU	Morgan	22 min
Jul 7, 3:57 PM MDT	Severe Thunderstorm Warning	BOU	Washington	33 min
Jul 7, 4:04 PM MDT	Special Weather Statement	BOU	Morgan	26 min
Jul 7, 4:07 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Washington	38 min
Jul 7, 4:10 PM MDT	Severe Thunderstorm Warning	BOU	Washington	20 min
Jul 7, 4:41 PM MDT	Severe Thunderstorm Warning	BOU	Washington	19 min
Jul 7, 4:59 PM MDT	Special Weather Statement	BOU	Phillips, Sedgwick	46 min
Jul 7, 5:29 PM MDT	Severe Thunderstorm Warning	BOU	Phillips, Sedgwick	31 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.