Alert archive / Nebraska / Special Weather Statements in 2017
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 6, 2017, 12:14 AM MDT for Morrill 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 outline as issued.
The facts
- Issued
- Aug 6, 2017, 12:14 AM MDT (06:14 UTC)
- Expired
- Aug 6, 2017, 12:45 AM MDT
- In force
- 31 min
- Issued by
- NWS Cheyenne, WY
County Morrill County, NE
The radar
The Cheyenne radar (KCYS), 164 km from the middle of the area, began a volume at 06:16 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 (KDEN), launched 00:00Z, 6.2 hours before the alert went out and 220 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
- 82 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 2054 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Aug 5, 11:21 PM MDT, 53 minutes earlier.
Area forecast discussion, Aug 5, 11:21 PM MDT, 53 minutes before
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</html>Hazardous weather outlook, Aug 5, 8:29 PM MDT, 3 hours 45 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 829 PM MDT Sat Aug 5 2017 NEZ002-003-019>021-054-055-095-096-WYZ101>119-070230- Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- North Sioux-South Sioux-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- 829 PM MDT Sat Aug 5 2017 This hazardous weather outlook is for portions of western Nebraska...east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...TONIGHT Showers and isolated thunderstorms will continue through shortly after midnight. Gusty winds and moderate rainfall are possible with most of the storms, however cannot rule out a storm or two producing small to marginally severe size hail. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY Chances for mainly afternoon and evening thunderstorms will exist through the period as several disturbances and cool fronts pass across the region. .Spotter information statement... Spotter activation will not be needed.
In the hours before
Local storm report, Aug 5, 8:30 PM MDT, 3 hours 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
830 PM MDT SAT AUG 05 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0825 PM HAIL 1 NE CHUGWATER 41.77N 104.81W
08/05/2017 E0.50 INCH PLATTE WY TRAINED SPOTTER
VERY HEAVY RAIN
&&
BCHAPMANSpecial weather statement, Aug 5, 8:45 PM MDT, 3 hours 29 minutes before
Special Weather Statement National Weather Service Cheyenne WY 845 PM MDT SAT AUG 5 2017 WYZ107-108-118-060330- East Platte County WY-Goshen County WY-Central Laramie County WY- 845 PM MDT SAT AUG 5 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN GOSHEN...NORTHERN LARAMIE AND SOUTHEASTERN PLATTE COUNTIES UNTIL 930 PM MDT... At 845 PM MDT, Doppler radar was tracking a strong thunderstorm 8 miles east of Chugwater, or 26 miles southeast of Wheatland, moving east at 30 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Hawk Springs. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4164 10475 4182 10475 4185 10425 4160 10424 TIME...MOT...LOC 0245Z 271DEG 24KT 4174 10465 Finch
Local storm report, Aug 5, 8:51 PM MDT, 3 hours 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
851 PM MDT SAT AUG 05 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0850 PM HAIL 8 W WHEATLAND 42.05N 105.11W
08/05/2017 E0.50 INCH PLATTE WY TRAINED SPOTTER
&&
BCHAPMANSpecial weather statement, Aug 5, 8:54 PM MDT, 3 hours 20 minutes before
Special Weather Statement National Weather Service Cheyenne WY 854 PM MDT SAT AUG 5 2017 WYZ106>108-060345- East Platte County WY- Central Laramie Range and Southwest Platte County WY- Goshen County WY- 854 PM MDT SAT AUG 5 2017 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL GOSHEN AND EAST CENTRAL PLATTE COUNTIES UNTIL 945 PM MDT... At 853 PM MDT, Doppler radar was tracking a strong thunderstorm over Wheatland, moving east at 30 mph. Dime size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Wheatland, Chugcreek, Lakeview North, Bordeaux and Y-O Ranch. This includes Interstate 25 in Wyoming between mile markers 72 and 83. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && LAT...LON 4195 10504 4211 10506 4212 10458 4193 10457 TIME...MOT...LOC 0253Z 271DEG 24KT 4202 10496 Finch
Special weather statement, Aug 6, 12:14 AM MDT, 0 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 |
|---|---|---|---|---|
| Aug 5, 8:20 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie, Platte | 25 min |
| Aug 5, 8:45 PM MDT | Special Weather Statement | CYS | Goshen | 45 min |
| Aug 5, 8:54 PM MDT | Special Weather Statement | CYS | Platte | 51 min |
| Aug 6, 7:20 AM MDT | Dense Fog Advisory | CYS | Albany, Laramie | 3 hr |
Nearby
Special Weather Statements in Nebraska, 2017Every special weather statement in 2017
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.