Alert archive / Montana / Winter Storm Warnings in 2016

Winter Storm Warning 4, NWS Billings, MT

October 3, 20165 counties in Montana

NWS Billings, MT issued this winter storm warning at Oct 3, 2016, 2:40 AM MDT for 5 counties in Montana. It took effect at Oct 3, 2016, 12:00 PM MDT. It was in force for 23 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 3, 2016, 2:40 AM MDT (08:40 UTC)
In effect from
Oct 3, 2016, 12:00 PM MDT
Expired
Oct 4, 2016, 11:26 AM MDT
In force
23 hr
Issued by
NWS Billings, MT

Counties Carbon County, MT, Park County, MT, Stillwater County, MT, Sweet Grass County, MT, Wheatland County, MT

The radar

The Billings radar (KBLX), 89 km from the middle of the area, began a volume at 08:41 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, 8.7 hours before the alert went out and 315 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 2016-10-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 joules per kilogram.LCLLFCEL10008507005003002001001 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 2016-10-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 233 square meters per square second.19395878Sfc1 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
12 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
2014 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
233 m²/s²
0-3 km storm-relative helicity
338 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 2, 7:30 PM MDTSpecial Weather StatementBYZTreasure45 min
Oct 2, 7:37 PM MDTAreal Flood AdvisoryBYZBig Horn3 hr
Oct 2, 8:17 PM MDTSpecial Weather StatementBYZTreasure28 min
Oct 3, 6:42 AM MDTSpecial Weather StatementBYZTreasure48 min
Oct 3, 1:05 PM MDTSpecial Weather StatementBYZCarter40 min
Oct 3, 1:45 PM MDTSpecial Weather StatementBYZCarter45 min
Oct 3, 2:40 AM MDTWinter Weather AdvisoryBYZ33 hr

Nearby

Winter Storm Warnings in Montana, 2016Every winter storm warning 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.