Alert archive / Wyoming / Winter Weather Advisories in 2021

Winter Weather Advisory 8, NWS Cheyenne, WY

February 8, 2021Albany County, Carbon County, Wyoming

NWS Cheyenne, WY issued this winter weather advisory at Feb 8, 2021, 2:01 PM MST for Albany County, Carbon County, Wyoming. It took effect at Feb 9, 2021, 5:00 AM MST. It was in force for 22 hr.

The area

The counties it named.

The facts

Issued: Feb 8, 2021, 2:01 PM MST (21:01 UTC)
In effect from: Feb 9, 2021, 5:00 AM MST
Expired: Feb 10, 2021, 2:38 AM MST
In force: 22 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 21:04 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

Denver, CO (KDNR), launched 12:00Z, 9.0 hours before the alert went out and 329 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: 2304 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 384 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 weather advisory 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 winter weather advisory went out at Feb 8, 10:55 AM MST, 3 hours 6 minutes earlier.

Area forecast discussion, Feb 8, 10:55 AM MST, 3 hours 6 minutes before

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Hazardous weather outlook, Feb 8, 12:23 PM MST, 1 hour 38 minutes before

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In the hours before

Local storm report, Feb 8, 12:26 PM MST, 1 hour 35 minutes before

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Local storm report, Feb 8, 12:50 PM MST, 1 hour 11 minutes before

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Local storm report, Feb 8, 12:53 PM MST, 1 hour 8 minutes before

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Local storm report, Feb 8, 12:54 PM MST, 1 hour 7 minutes before

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Local storm report, Feb 8, 1:03 PM MST, 58 minutes before

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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Feb 8, 1:07 PM MST, 54 minutes before

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      <p id="message1">
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      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 8, 1:52 PM MST	Wind Chill Advisory	CYS	Converse, Niobrara	19 hr

Nearby

Winter Weather Advisories in Wyoming, 2021 Every winter weather advisory in 2021

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.