Alert archive / Nebraska / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 241, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 7, 2023, 12:14 AM MDT for Morrill County, Scotts Bluff County, Sioux County, Nebraska. It was in force for 31 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
- Jul 7, 2023, 12:14 AM MDT (06:14 UTC)
- Expired
- Jul 7, 2023, 12:45 AM MDT
- In force
- 31 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE
The radar
The Cheyenne radar (KCYS), 146 km from the middle of the area, began a volume at 06:14 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 |
|---|---|---|---|
| Jul 6, 9:01 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 6.2 hours before the alert went out and 233 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
- 1002 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1257 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.8
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 Jul 6, 11:12 PM MDT, 1 hour 2 minutes earlier.
Area forecast discussion, Jul 6, 11:12 PM MDT, 1 hour 2 minutes before
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</html>Hazardous weather outlook, Jul 6, 2:04 PM MDT, 10 hours 10 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 204 PM MDT Thu Jul 6 2023 NEZ002-003-019>021-054-055-095-096-WYZ101-102-107-108-118-119- 072015- 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- East Platte County-Goshen County-Central Laramie County- East Laramie County- 204 PM MDT Thu Jul 6 2023 This hazardous weather outlook is for portions of panhandle Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Slight Risk for severe thunderstorms this afternoon and overnight. Large hail, strong wind gusts, and a tornado is possible. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY Continued thunderstorm chances through the weekend. Warmer and drier early next week possible. .Spotter information statement... Due to the potential for strong to severe thunderstorms across the area today, spotters are encouraged to report any hail, wind, or tornadoes to the National Weather Service. WYZ103>106-109>117-072015- North Laramie Range-Ferris/Seminoe/Shirley Mountains- Shirley Basin-Central Laramie Range and Southwest Platte 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- 204 PM MDT Thu Jul 6 2023 This hazardous weather outlook is for portions of south central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Near daily chances for afternoon showers and thunderstorms. Some may be strong to severe. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY Near daily chances for afternoon showers and thunderstorms. Some may be strong to severe. .Spotter information statement... Due to the potential for strong to severe thunderstorms across the area today, spotters are encouraged to report any hail, wind, or tornadoes to the National Weather Service.
In the hours before
Local storm report, Jul 6, 9:43 PM MDT, 2 hours 31 minutes before
Preliminary Local Storm Report
National Weather Service Cheyenne WY
943 PM MDT Thu Jul 6 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0920 PM Tstm Wnd Gst 7 ESE Lusk 42.71N 104.76W
07/06/2023 E75 MPH Niobrara WY Public
&&
MRDLocal storm report, Jul 6, 9:50 PM MDT, 2 hours 24 minutes before
Preliminary Local Storm Report
National Weather Service Cheyenne WY
950 PM MDT Thu Jul 6 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0925 PM Hail 2 N Lusk 42.79N 104.45W
07/06/2023 E1.75 inch Niobrara WY Public
&&
MRDLocal storm report, Jul 6, 10:23 PM MDT, 1 hour 51 minutes before
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</html>Local storm report, Jul 6, 11:02 PM MDT, 1 hour 12 minutes before
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</html>Special weather statement, Jul 6, 11:59 PM MDT, 15 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 |
|---|---|---|---|---|
| Jul 6, 6:45 PM MDT | Special Weather Statement | CYS | Converse | 45 min |
| Jul 6, 6:57 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 48 min |
| Jul 6, 7:34 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara | 41 min |
| Jul 6, 8:09 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara | 51 min |
| Jul 6, 8:41 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 49 min |
| Jul 6, 8:46 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 44 min |
| Jul 6, 8:47 PM MDT | Tornado Warning | CYS | Niobrara | 28 min |
| Jul 6, 9:08 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 37 min |
| Jul 6, 9:37 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 38 min |
| Jul 6, 9:46 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Platte | 44 min |
| Jul 6, 10:11 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 49 min |
| Jul 6, 10:18 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 24 min |
| Jul 6, 10:42 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Goshen, Niobrara, Platte | 48 min |
| Jul 6, 11:20 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 40 min |
| Jul 6, 10:57 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Scotts Bluff, Sioux | 63 min |
| Jul 6, 11:57 PM MDT | Special Weather Statement | CYS | Box Butte | 33 min |
| Jul 6, 11:59 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 31 min |
| Jul 7, 12:30 AM MDT | Special Weather Statement | CYS | Box Butte | 30 min |
| Jul 7, 12:48 AM MDT | Special Weather Statement | CYS | Morrill | 57 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2023Every severe thunderstorm warning in 2023
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.