Alert archive / Washington / Winter Weather Advisories in 2021
Winter Weather Advisory 29, NWS Spokane, WA
NWS Spokane, WA issued this winter weather advisory at Nov 8, 2021, 6:20 AM PST for Chelan County, Ferry County, Okanogan County, Washington. It took effect at Nov 8, 2021, 10:00 PM PST. It was in force for 27 hr.
The area
The counties it named.
The facts
- Issued
- Nov 8, 2021, 6:20 AM PST (14:20 UTC)
- In effect from
- Nov 8, 2021, 10:00 PM PST
- Expired
- Nov 10, 2021, 1:00 AM PST
- In force
- 27 hr
- Issued by
- NWS Spokane, WA
Counties Chelan County, WA, Ferry County, WA, Okanogan County, WA
The radar
The Spokane radar (KOTX), 164 km from the middle of the area, began a volume at 14:25 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
Quillayute State, WA (KUIL), launched 12:00Z, 2.3 hours before the alert went out and 364 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 583 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 248 m²/s²
- 0-3 km storm-relative helicity
- 348 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Spokane, WA wrote its last area forecast discussion before this winter weather advisory went out at Nov 8, 4:15 AM PST, 2 hours 5 minutes earlier.
Area forecast discussion, Nov 8, 4:15 AM PST, 2 hours 5 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, Nov 8, 4:58 AM PST, 1 hour 22 minutes before
Hazardous Weather Outlook National Weather Service Spokane WA 458 AM PST Mon Nov 8 2021 IDZ001-WAZ037-038-043-091300- Northern Panhandle-Northeast Mountains-Okanogan Highlands- Okanogan Valley- 458 AM PST Mon Nov 8 2021 This Hazardous Weather Outlook is for portions of North Idaho... North Central Washington and Northeast Washington. .DAY ONE...TODAY AND TONIGHT No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY An incoming system expected to bring accumulating snow down into the valleys Tuesday morning. Mountain passes will see a better potential for significant snow accumulations with travel impacts possible at times. IDZ002>004-026-027-WAZ031>036-041-044-091300- Coeur d'Alene Area-Idaho Palouse-Central Panhandle Mountains- Lewiston Area-Lewis and Southern Nez Perce Counties- Northeast Blue Mountains-Lower Garfield and Asotin Counties- Washington Palouse-Moses Lake Area-Upper Columbia Basin- Spokane Area-Wenatchee Area-Waterville Plateau- 458 AM PST Mon Nov 8 2021 This Hazardous Weather Outlook is for portions of North Idaho... North Central Idaho...Central Washington...East Central Washington...North Central Washington...Northeast Washington and Southeast Washington. .DAY ONE...TODAY AND TONIGHT No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY No hazardous weather is expected at this time. WAZ047>049-091300- Central Chelan County-Western Chelan County- Western Okanogan County- 458 AM PST Mon Nov 8 2021 This Hazardous Weather Outlook is for portions of North Central Washington. .DAY ONE...TODAY AND TONIGHT An overnight system expected to bring another round of several inches of snow to the Cascade Passes and impacting travel. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY Snow from the system will last through Tuesday before exiting the region. No hazardous weather is expected after Tuesday.
The office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 8, 2:21 PM PST | Winter Storm Warning | OTX | Chelan | 35 hr |
Nearby
Winter Weather Advisories in Washington, 2021Every winter weather advisory in 2021
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.