Alert archive / Wyoming / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 171, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 28, 2023, 2:22 PM MDT for Converse County, Niobrara County, Wyoming. It was in force for 53 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 28, 2023, 2:22 PM MDT (20:22 UTC)
- Expired
- Jun 28, 2023, 3:15 PM MDT
- In force
- 53 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Converse County, WY, Niobrara County, WY
The radar
The Cheyenne radar (KCYS), 208 km from the middle of the area, began a volume at 20:21 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 28, 1:56 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 8.4 hours before the alert went out and 207 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1886 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -54 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 28, 11:32 AM MDT, 2 hours 50 minutes earlier.
Area forecast discussion, Jun 28, 11:32 AM MDT, 2 hours 50 minutes before
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</html>Hazardous weather outlook, Jun 28, 3:44 AM MDT, 10 hours 38 minutes before
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</html>In the hours before
Special weather statement, Jun 28, 1:48 PM MDT, 34 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
148 PM MDT Wed Jun 28 2023
WYZ101-282030-
Converse County Lower Elevations WY-
148 PM MDT Wed Jun 28 2023
...A strong thunderstorm will impact portions of east central
Converse County through 230 PM MDT...
At 147 PM MDT, Doppler radar was tracking a strong thunderstorm over
Douglas, moving east at 15 mph.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
This storm will remain over mainly rural areas of east central
Converse County.
This includes Interstate 25 in Wyoming between mile markers 125 and
141.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4269 10545 4274 10548 4292 10522 4262 10507
TIME...MOT...LOC 1947Z 251DEG 15KT 4272 10541
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
RubinSpecial weather statement, Jun 28, 2:06 PM MDT, 16 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
206 PM MDT Wed Jun 28 2023
WYZ101-102-282045-
Converse County Lower Elevations WY-Niobrara County WY-
206 PM MDT Wed Jun 28 2023
...A strong thunderstorm will impact portions of southwestern
Niobrara and east central Converse Counties through 245 PM MDT...
At 205 PM MDT, Doppler radar was tracking a strong thunderstorm 14
miles north of Glendo, or 17 miles east of Douglas, moving east at 20
mph.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
This storm will remain over mainly rural areas of southwestern
Niobrara and east central Converse Counties, including the following
locations... Lost Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
east central Wyoming.
&&
LAT...LON 4264 10513 4278 10519 4296 10485 4262 10472
TIME...MOT...LOC 2005Z 250DEG 16KT 4271 10505
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
RubinThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 1:21 PM MDT | Flood Watch | CYS | Converse, Goshen, Laramie, Niobrara, Platte | 55 hr |
| Jun 28, 1:48 PM MDT | Special Weather Statement | CYS | Converse | 42 min |
| Jun 28, 2:06 PM MDT | Special Weather Statement | CYS | Niobrara | 39 min |
| Jun 28, 2:43 PM MDT | Special Weather Statement | CYS | Laramie | 47 min |
| Jun 28, 2:45 PM MDT | Special Weather Statement | CYS | Converse | 45 min |
| Jun 28, 3:13 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Goshen, Niobrara, Platte | 62 min |
| Jun 28, 3:26 PM MDT | Special Weather Statement | CYS | Platte | 34 min |
| Jun 28, 3:29 PM MDT | Special Weather Statement | CYS | Converse | 46 min |
| Jun 28, 3:47 PM MDT | Special Weather Statement | CYS | Converse | 43 min |
| Jun 28, 3:55 PM MDT | Special Weather Statement | CYS | Laramie | 35 min |
| Jun 28, 3:59 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 46 min |
| Jun 28, 4:07 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 38 min |
| Jun 28, 4:12 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 63 min |
| Jun 28, 4:20 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 25 min |
| Jun 28, 4:21 PM MDT | Special Weather Statement | CYS | Platte | 39 min |
| Jun 28, 4:39 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 66 min |
| Jun 28, 4:49 PM MDT | Special Weather Statement | CYS | Converse | 41 min |
| Jun 28, 5:18 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 57 min |
| Jun 28, 5:52 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 42 min |
| Jun 28, 5:12 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes, Sioux | 63 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 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.