Alert archive / Nebraska / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 12, NWS Cheyenne, WY

May 17, 2022Morrill County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at May 17, 2022, 6:41 PM MDT for Morrill County, Nebraska. It was in force for 34 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: May 17, 2022, 6:41 PM MDT (00:41 UTC)
Expired: May 17, 2022, 7:15 PM MDT
In force: 34 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Morrill County, NE

The radar

The Cheyenne radar (KCYS), 162 km from the middle of the area, began a volume at 00:41 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 00:00Z, 0.7 hours before the alert went out and 206 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: 22 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 2717 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 171 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 severe thunderstorm 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 severe thunderstorm warning went out at May 17, 5:30 PM MDT, 1 hour 11 minutes earlier.

Area forecast discussion, May 17, 5:30 PM MDT, 1 hour 11 minutes before

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Hazardous weather outlook, May 17, 5:31 AM MDT, 13 hours 10 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
531 AM MDT Tue May 17 2022

NEZ002-003-019>021-054-055-095-096-WYZ101>119-181145-
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
531 AM MDT Tue May 17 2022

This hazardous weather outlook is for portions of panhandle
Nebraska...east central Wyoming...south central Wyoming and
southeast Wyoming.

.DAY ONE...TODAY AND TONIGHT

Scattered thunderstorms with isolated severe thunderstorms
possible today. Two rounds of storms likely, first round between
3 PM MDT and 9 PM MDT, second round between 10 PM MDT and 12 AM
MDT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Isolated to scattered thunderstorms possible Wednesday, severe
weather is not anticipated with these storms. Drastic cool down
with scattered to widespread precipitation chances Thursday
through Friday. Rain transitioning to snow Thursday night/early
Friday morning.

.Spotter information statement...

Spotter activation is not likely, but may be needed Today

In the hours before

Local storm report, May 17, 5:29 PM MDT, 1 hour 12 minutes before

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Local storm report, May 17, 5:57 PM MDT, 44 minutes before

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Special weather statement, May 17, 6:00 PM MDT, 41 minutes before

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Local storm report, May 17, 6:11 PM MDT, 30 minutes before

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Local storm report, May 17, 6:15 PM MDT, 26 minutes before

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Local storm report, May 17, 6:30 PM MDT, 11 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
May 17, 6:44 PM MDT	Special Weather Statement	CYS	Niobrara	46 min
May 18, 3:46 AM MDT	High Wind Watch	CYS	Albany, Carbon, Laramie, Platte	11 hr
May 18, 3:52 AM MDT	Winter Storm Watch	CYS	Albany, Carbon, Laramie	23 hr
May 18, 3:52 AM MDT	Winter Weather Advisory	CYS	Albany, Carbon	65 hr
May 18, 2:16 PM MDT	High Wind Warning	CYS	Albany, Carbon, Converse, Laramie, Platte	29 hr
May 17, 6:00 PM MDT	Special Weather Statement	CYS	Morrill	45 min
May 17, 6:05 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	40 min
May 17, 8:54 PM MDT	Special Weather Statement	CYS	Scotts Bluff	36 min
May 17, 9:02 PM MDT	Special Weather Statement	CYS	Cheyenne	43 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2022 Every severe thunderstorm warning in 2022

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.