Alert archive / Montana / Wind Chill Advisories in 2016

Wind Chill Advisory 4, NWS Billings, MT

December 17, 20167 counties in Montana

NWS Billings, MT issued this wind chill advisory at Dec 17, 2016, 11:22 AM MST for 7 counties in Montana. It was in force for 22 hr.

The area

The counties it named.

The facts

Issued
Dec 17, 2016, 11:22 AM MST (18:22 UTC)
Expired
Dec 18, 2016, 9:32 AM MST
In force
22 hr
Issued by
NWS Billings, MT

Counties Big Horn County, MT, Carter County, MT, Custer County, MT, Fallon County, MT, Powder River County, MT, Rosebud County, MT, Treasure County, MT

The radar

The Billings radar (KBLX), 206 km from the middle of the area, began a volume at 18:28 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 12:00Z, 6.4 hours before the alert went out and 371 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 12:00Z on 2016-12-17Temperature 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 12:00Z on 2016-12-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
805 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind chill advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Billings, MT wrote its last area forecast discussion before this wind chill advisory went out at Dec 17, 9:33 AM MST, 1 hour 49 minutes earlier.

Area forecast discussion, Dec 17, 9:33 AM MST, 1 hour 49 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Dec 16, 3:12 PM MST, 20 hours 10 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BILLINGS MT
312 PM MST FRI DEC 16 2016

MTZ028>042-056>058-063>068-WYZ098-099-162315-
SOUTHERN WHEATLAND-MUSSELSHELL-TREASURE-NORTHERN ROSEBUD-CUSTER-
FALLON-NORTHERN STILLWATER-YELLOWSTONE-POWDER RIVER-CARTER-
SOUTHERN BIG HORN-EASTERN CARBON-NORTHERN PARK-
NORTHERN SWEET GRASS-GOLDEN VALLEY-RED LODGE FOOTHILLS-
NORTHERN BIG HORN-SOUTHERN ROSEBUD-JUDITH GAP-PARADISE VALLEY-
LIVINGSTON AREA-BEARTOOTH FOOTHILLS-ABSAROKA/BEARTOOTH MOUNTAINS-
CRAZY MOUNTAINS-NORTHEAST BIGHORN MOUNTAINS-SHERIDAN FOOTHILLS-
312 PM MST FRI DEC 16 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
MONTANA...SOUTH CENTRAL MONTANA...SOUTHEAST MONTANA AND NORTH
CENTRAL WYOMING.

SEE CURRENT FORECAST AND WINTER STORM HIGHLITES FOR INFORMATION
ON THE ONGOING STORM SYSTEM.

In the hours before

Special weather statement, Dec 17, 7:36 AM MST, 3 hours 46 minutes before
Special Weather Statement
National Weather Service Billings MT
736 AM MST SAT DEC 17 2016

MTZ040-041-065-171630-
Livingston Area MT-Northern Park MT-Northern Sweet Grass MT-
736 AM MST SAT DEC 17 2016

Southwest winds of 15 to 30 mph have developed from Livingston to
Big Timber this morning. This wind is blowing around 1 to 2 feet of
fresh snow causing visibilities to drop. Expect visibilities of 1 to
3 miles in blowing snow through mid morning from Livingston to Big
Timber, including portions of I-90 and Highway 191. Significant
drifting snow is also expected especially on rural roadways. In
addition to the blowing snow wind chill values of -45 to -60 degrees
can be expected this morning.

Locations impacted include...
Livingston, Big Timber, Clyde Park, Greycliff and Springdale.

LAT...LON 4591 11076 4594 11044 4588 11040 4588 11034
      4596 11016 4601 10950 4569 10973 4577 10988
      4576 10998 4580 11000 4573 11022 4557 11022
      4560 11029 4565 11023 4563 11036 4559 11031
      4558 11032 4563 11043 4559 11052 4563 11071
TIME...MOT...LOC 1431Z 240DEG 49KT 4574 11051

Chambers

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 17, 7:36 AM MSTSpecial Weather StatementBYZSweet Grass114 min
Dec 17, 8:50 AM MSTWinter Weather AdvisoryBYZBig Horn, Golden Valley, Musselshell, Park, Stillwater, Sweet Grass and 2 more63 hr
Dec 17, 2:21 PM MSTBlizzard WarningBYZPark, Stillwater, Sweet Grass46 hr

Nearby

Wind Chill Advisories in Montana, 2016Wind Chill Advisories in Wyoming, 2016Every wind chill advisory 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.