Alert archive / Wyoming / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 64, NWS Billings, MT

July 12, 2006Sheridan County, Wyoming

NWS Billings, MT issued this severe thunderstorm warning at Jul 12, 2006, 7:37 PM MDT for Sheridan County, Wyoming. It was in force for 39 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
Jul 12, 2006, 7:37 PM MDT (01:37 UTC)
Expired
Jul 12, 2006, 8:16 PM MDT
In force
39 min
Issued by
NWS Billings, MT
Area
Counties, with a storm outline in the text

County Sheridan County, WY

The radar

The Billings radar (KBLX), 180 km from the middle of the area, began a volume at 01:36 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

Rapid City, SD (KUNR), launched 00:00Z, 1.6 hours before the alert went out and 327 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.

Skew-T log-pSkew-T log-p diagram, Rapid City, SD at 00:00Z on 2006-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 648 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Rapid City, SD at 00:00Z on 2006-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
648 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
3226 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
142 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The office that day

Everything else NWS Billings, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 12, 6:28 PM MDTSevere Thunderstorm WarningBYZYellowstone62 min
Jul 12, 6:47 PM MDTSevere Thunderstorm WarningBYZBig Horn58 min
Jul 12, 7:26 PM MDTSevere Thunderstorm WarningBYZRosebud, Treasure, Yellowstone64 min
Jul 12, 7:51 PM MDTSevere Thunderstorm WarningBYZBig Horn, Rosebud, Treasure54 min
Jul 12, 8:28 PM MDTSevere Thunderstorm WarningBYZCuster, Powder River, Rosebud2 hr
Jul 12, 9:09 PM MDTSevere Thunderstorm WarningBYZCarter, Fallon81 min
Jul 13, 3:47 AM MDTRed Flag WarningBYZBig Horn, Carter, Custer, Fallon, Golden Valley, Musselshell and 4 more17 hr

Nearby

Severe Thunderstorm Warnings in Wyoming, 2006Every severe thunderstorm warning in 2006

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.