Alert archive / Montana / Wind Chill Advisories in 2019

Wind Chill Advisory 8, NWS Missoula, MT

October 28, 201911 counties in Montana; Lemhi County, Idaho

NWS Missoula, MT issued this wind chill advisory at Oct 28, 2019, 9:58 AM MDT for 11 counties in Montana; Lemhi County, Idaho. It took effect at Oct 28, 2019, 9:00 PM MDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Oct 28, 2019, 9:58 AM MDT (15:58 UTC)
In effect from: Oct 28, 2019, 9:00 PM MDT
Expired: Oct 29, 2019, 12:00 PM MDT
In force: 15 hr
Issued by: NWS Missoula, MT

Counties Lemhi County, ID, Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Lincoln County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT

The radar

The Missoula radar (KMSX), 18 km from the middle of the area, began a volume at 16:00 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

Boise Airport, ID (KBOI), launched 12:00Z, 4.0 hours before the alert went out and 407 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1714 m above ground
0-6 km bulk shear: 88 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 291 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 Missoula, MT wrote its last area forecast discussion before this wind chill advisory went out at Oct 28, 3:34 AM MDT, 6 hours 24 minutes earlier.

Area forecast discussion, Oct 28, 3:34 AM MDT, 6 hours 24 minutes before

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In the hours before

Local storm report, Oct 28, 6:27 AM MDT, 3 hours 31 minutes before

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Local storm report, Oct 28, 7:33 AM MDT, 2 hours 25 minutes before

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Local storm report, Oct 28, 7:45 AM MDT, 2 hours 13 minutes before

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    <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.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 28, 9:58 AM MDT	Winter Storm Warning	MSO	Deer Lodge, Flathead, Granite, Lake, Mineral, Missoula and 4 more	11 hr
Oct 28, 3:25 AM MDT	Wind Advisory	MSO	Clearwater, Idaho	18 hr

Nearby

Wind Chill Advisories in Montana, 2019 Wind Chill Advisories in Idaho, 2019 Every wind chill advisory in 2019

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.