Alert archive / Wyoming / Red Flag Warnings in 2025

Red Flag Warning 10, NWS Cheyenne, WY

June 27, 2025Albany County, Carbon County, Wyoming

NWS Cheyenne, WY issued this red flag warning at Jun 27, 2025, 11:19 PM MDT for Albany County, Carbon County, Wyoming. It took effect at Jun 28, 2025, 11:00 AM MDT. It was in force for 10 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: Jun 27, 2025, 11:19 PM MDT (05:19 UTC)
In effect from: Jun 28, 2025, 11:00 AM MDT
Expired: Jun 28, 2025, 9:00 PM MDT
In force: 10 hr
Issued by: NWS Cheyenne, WY

Counties Albany County, WY, Carbon County, WY

The radar

The Cheyenne radar (KCYS), 140 km from the middle of the area, began a volume at 05:20 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

Rapid City, SD (KUNR), launched 00:00Z, 5.3 hours before the alert went out and 387 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: 1095 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 3285 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 164 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Cheyenne, WY wrote its last area forecast discussion before this red flag warning went out at Jun 27, 5:52 PM MDT, 5 hours 27 minutes earlier.

Area forecast discussion, Jun 27, 5:52 PM MDT, 5 hours 27 minutes before

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Hazardous weather outlook, Jun 27, 3:32 PM MDT, 7 hours 47 minutes before

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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 28, 5:08 PM MDT	Special Weather Statement	CYS	Albany	37 min
Jun 28, 3:41 PM MDT	Special Weather Statement	CYS	Cheyenne	49 min
Jun 28, 4:23 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Cheyenne	37 min
Jun 28, 5:01 PM MDT	Special Weather Statement	CYS	Box Butte	44 min
Jun 28, 5:44 PM MDT	Special Weather Statement	CYS	Box Butte	46 min
Jun 28, 5:53 PM MDT	Special Weather Statement	CYS	Morrill	52 min

Nearby

Red Flag Warnings in Wyoming, 2025 Every red flag 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.