Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 126, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 29, 2018, 11:30 PM MDT for Banner County, Nebraska. It was in force for 19 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
- Jun 29, 2018, 11:30 PM MDT (05:30 UTC)
- Expired
- Jun 29, 2018, 11:49 PM MDT
- In force
- 19 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
County Banner County, NE
The radar
The Cheyenne radar (KCYS), 101 km from the middle of the area, began a volume at 05:31 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 |
|---|---|---|---|
| Jun 29, 5:19 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 5.5 hours before the alert went out and 264 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
- 4631 J/kg
- Mixed-layer CIN
- -71 J/kg
- Mixed-layer LCL
- 1283 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
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 Jun 29, 11:30 PM MDT, 0 minutes earlier.
Area forecast discussion, Jun 29, 11:30 PM MDT, 0 minutes before
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</html>Hazardous weather outlook, Jun 29, 1:45 PM MDT, 9 hours 45 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 145 PM MDT Fri Jun 29 2018 NEZ019>021-054-055-WYZ106-116>119-301945- Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- Central Laramie Range and Southwest Platte County- South Laramie Range-South Laramie Range Foothills- Central Laramie County-East Laramie County- 145 PM MDT Fri Jun 29 2018 This hazardous weather outlook is for portions of western Nebraska and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Isolated thunderstorms are possible this afternoon and through tonight. Although severe thunderstorms appear unlikely at this time, can not rule out a few strong to severe storms late this afternoon through midnight as a frontal boundary pushes through the area. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY Scattered to numerous thunderstorms are expected on Saturday, especially along the Interstate 80 corridor. .Spotter information statement... Spotter activation is unlikely at this time. Report any severe weather to the National Weather Service.. NEZ002-003-095-096-WYZ101>103-107-108-301945- Dawes-Box Butte-North Sioux-South Sioux- Converse County Lower Elevations-Niobrara County- North Laramie Range-East Platte County-Goshen County- 145 PM MDT Fri Jun 29 2018 This hazardous weather outlook is for portions of western Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT A Severe Thunderstorm Watch is in effect for Niobrara and Converse counties until 8 pm MDT late this evening. Scattered thunderstorms will develop shortly and move northeast through this evening. Some storms will contain very large hail, strong damaging winds, and frequent lightning. An isolated tornado is possible as well. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY Scattered thunderstorms are possible on Saturday. .Spotter information statement... Spotters are urged to report severe weather to the National Weather Service This afternoon and this evening. WYZ104-105-109>115-301945- Ferris/Seminoe/Shirley Mountains-Shirley Basin- Central Carbon County-North Snowy Range Foothills- Southwest Carbon County-Sierra Madre Range- Upper North Platte River Basin-Snowy Range-Laramie Valley- 145 PM MDT Fri Jun 29 2018 This hazardous weather outlook is for portions of south central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Red Flag Warnings continue for the higher terrain of southeast Wyoming this afternoon and early evening with gusty west winds up to 35 mph and low humidities. Isolated thunderstorms will develop this afternoon and evening. A few strong thunderstorms with small hail and gusty winds are possible. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY Scattered to numerous thunderstorms are possible on Saturday. .Spotter information statement... Spotter activation will not be required at this time.
In the hours before
Special weather statement, Jun 29, 6:45 PM MDT, 4 hours 45 minutes before
Special Weather Statement National Weather Service Cheyenne WY 645 PM MDT FRI JUN 29 2018 NEZ095-300130- North Sioux NE- 645 PM MDT FRI JUN 29 2018 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SIOUX COUNTY UNTIL 730 PM MDT... At 645 PM MDT, Doppler radar was tracking a strong thunderstorm 12 miles west of Montrose, or 25 miles south of Edgemont, moving northeast at 35 mph. Nickel size hail and wind gusts up to 50 mph will be possible with this storm. This storm will remain over mainly rural areas of northwestern Sioux County. A Severe Thunderstorm Watch remains in effect until 100 AM MDT for the Panhandle of Nebraska. LAT...LON 4285 10399 4288 10405 4300 10405 4300 10361 TIME...MOT...LOC 0045Z 222DEG 29KT 4294 10398 Hammer
Local storm report, Jun 29, 6:58 PM MDT, 4 hours 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
658 PM MDT FRI JUN 29 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0646 PM HAIL 9 SSW MARSLAND 42.32N 103.36W
06/29/2018 M1.25 INCH BOX BUTTE NE TRAINED SPOTTER
HAIL FELL FOR A DURATION FIVE MINUTES.
&&
WMOKRYLocal storm report, Jun 29, 7:35 PM MDT, 3 hours 55 minutes before
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</html>Local storm report, Jun 29, 7:41 PM MDT, 3 hours 49 minutes before
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</html>Special weather statement, Jun 29, 8:29 PM MDT, 3 hours 1 minute before
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</html>Special weather statement, Jun 29, 11:19 PM MDT, 11 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 |
|---|---|---|---|---|
| Jun 30, 1:33 PM MDT | Special Weather Statement | CYS | Laramie | 42 min |
| Jun 30, 2:34 PM MDT | Special Weather Statement | CYS | Laramie | 41 min |
| Jun 29, 6:01 PM MDT | Special Weather Statement | CYS | Banner | 44 min |
| Jun 29, 6:18 PM MDT | Special Weather Statement | CYS | Banner | 42 min |
| Jun 29, 6:26 PM MDT | Special Weather Statement | CYS | Box Butte | 49 min |
| Jun 29, 6:36 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 54 min |
| Jun 29, 6:43 PM MDT | Special Weather Statement | CYS | Sioux | 47 min |
| Jun 29, 7:05 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 40 min |
| Jun 29, 7:15 PM MDT | Tornado Warning | CYS | Dawes, Sioux | 45 min |
| Jun 29, 7:26 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes | 49 min |
| Jun 29, 7:32 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill | 58 min |
| Jun 29, 7:50 PM MDT | Severe Thunderstorm Warning | CYS | Dawes, Sioux | 40 min |
| Jun 29, 8:29 PM MDT | Special Weather Statement | CYS | Morrill | 46 min |
| Jun 29, 11:19 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 41 min |
| Jun 29, 11:52 PM MDT | Special Weather Statement | CYS | Kimball | 38 min |
| Jun 30, 12:32 AM MDT | Special Weather Statement | CYS | Kimball | 28 min |
| Jun 30, 3:17 PM MDT | Special Weather Statement | CYS | Box Butte | 43 min |
| Jun 30, 3:33 PM MDT | Special Weather Statement | CYS | Kimball | 42 min |
| Jun 30, 3:39 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne, Kimball | 36 min |
| Jun 30, 4:09 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne, Morrill | 52 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2018Every severe thunderstorm warning 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.