Alert archive / Wyoming / Winter Storm Watches in 2016

Winter Storm Watch 15, NWS Cheyenne, WY

December 4, 2016Albany County, Carbon County, Wyoming

NWS Cheyenne, WY issued this winter storm watch at Dec 4, 2016, 3:07 AM MST for Albany County, Carbon County, Wyoming. It took effect at Dec 5, 2016, 8:00 AM MST. It was in force for .

The area

The counties it named.

The facts

Issued
Dec 4, 2016, 3:07 AM MST (10:07 UTC)
In effect from
Dec 5, 2016, 8:00 AM MST
Expired
Dec 4, 2016, 2:32 PM MST
In force
Issued by
NWS Cheyenne, WY

Counties Albany County, WY, Carbon County, WY

The radar

The Cheyenne radar (KCYS), 140 km from the middle of the area, began a volume at 10:04 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

Riverton, WY (KRIW), launched 00:00Z, 10.1 hours before the alert went out and 230 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, Riverton, WY at 00:00Z on 2016-12-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 00:00Z on 2016-12-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 square meters per square second.1939587897117136156Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2297 m above ground
0-6 km bulk shear
106 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 4, 12:41 AM MSTBlizzard WatchCYSAlbany, Carbon14 hr
Dec 4, 2:32 PM MSTWinter Weather AdvisoryCYSAlbany, Carbon, Converse29 hr

Nearby

Winter Storm Watches in Wyoming, 2016Every winter storm watch in 2016

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.