Alert archive / Wyoming / Special Weather Statements in 2017
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 4, 2017, 8:19 AM MDT for Laramie County, Wyoming. It was in force for 116 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 4, 2017, 8:19 AM MDT (14:19 UTC)
- Expired
- Aug 4, 2017, 10:15 AM MDT
- In force
- 116 min
- Issued by
- NWS Cheyenne, WY
County Laramie County, WY
The radar
The Cheyenne radar (KCYS), 15 km from the middle of the area, began a volume at 14:20 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 12:00Z, 2.3 hours before the alert went out and 189 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
- 62 J/kg
- Mixed-layer CIN
- -383 J/kg
- Mixed-layer LCL
- 1868 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 4, 3:26 AM MDT, 4 hours 53 minutes earlier.
Area forecast discussion, Aug 4, 3:26 AM MDT, 4 hours 53 minutes before
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</html>Hazardous weather outlook, Aug 4, 6:34 AM MDT, 1 hour 45 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 634 AM MDT Fri Aug 4 2017 WYZ101>119-051245- 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- 634 AM MDT Fri Aug 4 2017 This hazardous weather outlook is for southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Isolated thunderstorms are expected today, mainly east of Interstate 25. Thunderstorms may contain gusty winds and brief heavy rainfall. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY A more active weather pattern is anticipated this weekend through the middle of next week as a cold front stalls across the area. Thunderstorms will be possible each day Saturday through Thursday. .Spotter information statement... Spotter activation will not be required at this time. NEZ002-003-019>021-054-055-095-096-051245- Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- North Sioux-South Sioux- 634 AM MDT Fri Aug 4 2017 This hazardous weather outlook is for portions of western Nebraska. .DAY ONE...TODAY AND TONIGHT Widely scattered thunderstorms are expected by this evening across western Nebraska. Some of these thunderstorms may become strong with small hail, gusty winds, and frequent lightning possible. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY A more active weather pattern is anticipated this weekend through the middle of next week. Thunderstorms will be possible each day Saturday through Thursday, especially across the southern panhandle. .Spotter information statement... Spotter activation will not be required at this time.
In the hours before
Special weather statement, Aug 4, 8:19 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 4, 2:06 AM MDT | Red Flag Warning | CYS | 17 hr | |
| Aug 4, 2:21 PM MDT | Fire Weather Watch | CYS | 12 hr | |
| Aug 4, 4:39 PM MDT | Special Weather Statement | CYS | Converse | 51 min |
Nearby
Special Weather Statements in Wyoming, 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.