Alert archive / Wyoming / Severe Thunderstorm Watches in 2005
Severe Thunderstorm Watch 716
The Storm Prediction Center issued this severe thunderstorm watch at Aug 12, 2005, 4:05 PM MDT for 7 counties in Wyoming. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2005, 4:05 PM MDT (22:05 UTC)
- Expired
- Aug 12, 2005, 8:23 PM MDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
Counties Campbell County, WY, Converse County, WY, Johnson County, WY, Natrona County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY
The radar
The Riverton/Lander radar (KRIW), 213 km from the middle of the area, began a volume at 22:09 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.
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 4:26 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 49 min |
| Aug 12, 4:34 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 56 min |
| Aug 12, 4:46 PM MDT | Tornado Warning | UNR | Campbell | 59 min |
| Aug 12, 5:06 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 39 min |
| Aug 12, 5:31 PM MDT | Tornado Warning | UNR | Weston | 44 min |
| Aug 12, 5:56 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 62 min |
| Aug 12, 6:18 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 27 min |
| Aug 12, 6:32 PM MDT | Tornado Warning | CYS | Converse | 31 min |
| Aug 12, 6:57 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 33 min |
| Aug 12, 7:02 PM MDT | Tornado Warning | CYS | Converse | 43 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 10.1 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
- 111 J/kg
- Mixed-layer CIN
- -110 J/kg
- Mixed-layer LCL
- 1291 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 297 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 2:08 PM MDT | Mesoscale Discussion | SPC | Big Horn, Campbell, Converse, Fremont, Hot Springs, Johnson and 5 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Wyoming, 2005Every severe thunderstorm watch in 2005
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.