Alert archive / Wyoming / Special Weather Statements in 2019
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 5, 2019, 7:21 PM MDT for Platte County, Wyoming. It was in force for 39 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 5, 2019, 7:21 PM MDT (01:21 UTC)
- Expired
- Aug 5, 2019, 8:00 PM MDT
- In force
- 39 min
- Issued by
- NWS Cheyenne, WY
County Platte County, WY
The radar
The Cheyenne radar (KCYS), 163 km from the middle of the area, began a volume at 01:24 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 5, 7:55 PM MDT | TSTM WND DMG | 4 Ssw Esterbrook, WY | CALLER REPORTED A RIDING LAWN MOVER HAD BEEN BLOWN OVER AND DAMAGED BY STRONG WIND GUSTS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Riverton, WY (KRIW), launched 00:00Z, 1.4 hours before the alert went out and 241 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
- 344 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 2976 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 181 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.4
The text
As transmitted.
234 WWUS85 KCYS 060121 SPSCYS Special Weather Statement National Weather Service Cheyenne WY 721 PM MDT Mon Aug 5 2019 WYZ101-103-107-060200- East Platte County WY-Converse County Lower Elevations WY- North Laramie Range WY- 721 PM MDT Mon Aug 5 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN ALBANY... NORTHWESTERN PLATTE AND SOUTHWESTERN CONVERSE COUNTIES UNTIL 800 PM MDT... At 721 PM MDT, Doppler radar was tracking a strong thunderstorm 8 miles south of Laprele Reservoir, or 15 miles southwest of Douglas, moving southeast at 25 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Esterbrook Campground, Laprele Reservoir, Esterbrook, Curtis Gulch Campground, Laramie Peak and Harris Park. 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. Persons in campgrounds should consider seeking sturdy shelter until this storm passes. && LAT...LON 4256 10584 4273 10564 4250 10507 4220 10537 TIME...MOT...LOC 0121Z 309DEG 20KT 4259 10559 $$ Trudel
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 6:23 PM MDT | Special Weather Statement | CYS | 52 min | |
| Aug 5, 6:40 PM MDT | Special Weather Statement | CYS | Platte | 50 min |
| Aug 5, 6:55 PM MDT | Special Weather Statement | CYS | Laramie | 35 min |
| Aug 5, 7:05 PM MDT | Special Weather Statement | CYS | Converse | 40 min |
| Aug 5, 7:42 PM MDT | Special Weather Statement | CYS | Laramie | 48 min |
| Aug 5, 7:48 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Platte | 27 min |
| Aug 5, 8:06 PM MDT | Special Weather Statement | CYS | Niobrara | 39 min |
| Aug 5, 8:20 PM MDT | Special Weather Statement | CYS | Platte | 40 min |
| Aug 5, 8:41 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Goshen, Niobrara, Platte | 34 min |
| Aug 5, 9:02 PM MDT | Special Weather Statement | CYS | Goshen, Platte | 43 min |
| Aug 5, 9:28 PM MDT | Special Weather Statement | CYS | Niobrara | 47 min |
| Aug 6, 4:20 PM MDT | Special Weather Statement | CYS | Platte | 40 min |
| Aug 6, 4:07 PM MDT | Special Weather Statement | CYS | Sioux | 38 min |
| Aug 6, 4:37 PM MDT | Special Weather Statement | CYS | Sioux | 38 min |
| Aug 6, 5:19 PM MDT | Special Weather Statement | CYS | Box Butte, Sioux | 41 min |
Nearby
Special Weather Statements in Wyoming, 2019Every special weather statement in 2019
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.