Alert archive / Wyoming / High Wind Watches in 2018

High Wind Watch 28, NWS Cheyenne, WY

April 12, 20185 counties in Wyoming; Banner County, Kimball County, Nebraska

NWS Cheyenne, WY issued this high wind watch at Apr 12, 2018, 4:10 AM MDT for 5 counties in Wyoming; Banner County, Kimball County, Nebraska. It took effect at Apr 13, 2018, 10:00 AM MDT. It was in force for .

The area

The counties it named.

The facts

Issued: Apr 12, 2018, 4:10 AM MDT (10:10 UTC)
In effect from: Apr 13, 2018, 10:00 AM MDT
Expired: Apr 12, 2018, 12:25 PM MDT
In force
Issued by: NWS Cheyenne, WY

Counties Banner County, NE, Kimball County, NE, Albany County, WY, Carbon County, WY, Goshen County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 57 km from the middle of the area, began a volume at 10:10 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 (KRAP), launched 00:00Z, 10.2 hours before the alert went out and 313 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: 1268 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 265 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 high wind watch 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 high wind watch went out at Apr 11, 10:51 PM MDT, 5 hours 19 minutes earlier.

Area forecast discussion, Apr 11, 10:51 PM MDT, 5 hours 19 minutes before

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Hazardous weather outlook, Apr 11, 7:15 PM MDT, 8 hours 55 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
Apr 11, 8:12 PM MDT	Red Flag Warning	CYS		18 hr
Apr 12, 3:40 AM MDT	Winter Weather Advisory	CYS	Albany, Carbon, Converse, Goshen, Laramie, Platte	47 hr
Apr 12, 4:10 AM MDT	High Wind Warning	CYS	Albany, Carbon, Laramie, Platte	16 hr
Apr 12, 12:22 PM MDT	Winter Storm Warning	CYS	Niobrara	42 hr
Apr 12, 12:25 PM MDT	High Wind Warning	CYS	Albany, Goshen, Laramie, Platte	32 hr

Nearby

High Wind Watches in Wyoming, 2018 High Wind Watches in Nebraska, 2018 Every high wind watch in 2018

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.