Alert archive / Nebraska / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 24, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at May 18, 2025, 5:36 PM MDT for Cheyenne County, Morrill County, Nebraska. It was in force for 24 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 18, 2025, 5:36 PM MDT (23:36 UTC)
- Expired
- May 18, 2025, 6:00 PM MDT
- In force
- 24 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Cheyenne County, NE, Morrill County, NE
The radar
The Cheyenne radar (KCYS), 155 km from the middle of the area, began a volume at 23:39 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 |
|---|---|---|---|
| May 18, 1:57 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 11.6 hours before the alert went out and 478 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1656 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 18, 5:35 PM MDT, 1 minute earlier.
Area forecast discussion, May 18, 5:35 PM MDT, 1 minute before
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</html>Hazardous weather outlook, May 18, 1:33 PM MDT, 4 hours 3 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 133 PM MDT Sun May 18 2025 NEZ002-003-019>021-054-055-095-096-WYZ101>119-191945- 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- 133 PM MDT Sun May 18 2025 This hazardous weather outlook is for portions of panhandle Nebraska...east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT - Active weather pattern today and Monday as another Pacific storm system impacts the region. There is an Enhanced Risk for severe thunderstorms on Sunday across the eastern plains. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY - Cold front Sunday night will bring accumulating snow chances to higher elevations Sunday night through Monday. Unseasonably cold temperatures and strong winds are also expected with the front. .Spotter information statement... Spotters are encouraged to report severe weather to the NWS.
In the hours before
Local storm report, May 18, 5:03 PM MDT, 33 minutes before
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</html>Local storm report, May 18, 5:04 PM MDT, 32 minutes before
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</html>Local storm report, May 18, 5:15 PM MDT, 21 minutes before
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</html>Local storm report, May 18, 5:20 PM MDT, 16 minutes before
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</html>Local storm report, May 18, 5:22 PM MDT, 14 minutes before
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</html>Local storm report, May 18, 5:34 PM MDT, 2 minutes before
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 4:04 AM MDT | Special Weather Statement | CYS | Laramie | 26 min |
| May 18, 6:19 AM MDT | Dense Fog Advisory | CYS | Albany, Laramie | 4 hr |
| May 18, 12:24 PM MDT | Winter Weather Advisory | CYS | Albany, Carbon | 26 hr |
| May 18, 12:35 PM MDT | Special Weather Statement | CYS | Albany | 40 min |
| May 18, 1:20 PM MDT | Special Weather Statement | CYS | Converse | 25 min |
| May 18, 1:24 PM MDT | Special Weather Statement | CYS | Platte | 36 min |
| May 18, 2:01 PM MDT | Special Weather Statement | CYS | Albany | 29 min |
| May 18, 2:16 PM MDT | Special Weather Statement | CYS | Converse | 29 min |
| May 18, 2:30 PM MDT | Special Weather Statement | CYS | Platte | 30 min |
| May 18, 2:57 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 48 min |
| May 18, 3:02 PM MDT | Special Weather Statement | CYS | Platte | 28 min |
| May 18, 3:28 PM MDT | Special Weather Statement | CYS | Laramie | 17 min |
| May 18, 3:28 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 47 min |
| May 18, 3:40 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 50 min |
| May 18, 4:08 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 37 min |
| May 18, 4:16 PM MDT | Special Weather Statement | CYS | Platte | 44 min |
| May 18, 4:57 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 48 min |
| May 18, 3:46 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Cheyenne, Kimball, Morrill | 44 min |
| May 18, 4:14 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 46 min |
| May 18, 4:26 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Cheyenne, Kimball, Morrill | 49 min |
| May 18, 4:50 PM MDT | Tornado Warning | CYS | Cheyenne, Morrill | 25 min |
| May 18, 4:55 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne, Morrill | 50 min |
| May 18, 5:05 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Sioux | 19 min |
| May 18, 5:14 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill, Scotts Bluff, Sioux | 46 min |
| May 18, 5:18 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes | 42 min |
| May 18, 5:51 PM MDT | Special Weather Statement | CYS | Sioux | 24 min |
| May 18, 5:54 PM MDT | Special Weather Statement | CYS | Dawes | 36 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2025Every 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.