Alert archive / California / Winter Storm Warnings in 2019

Winter Storm Warning 18, NWS Medford, OR

November 28, 2019Siskiyou County, California

NWS Medford, OR issued this winter storm warning at Nov 28, 2019, 1:25 PM PST for Siskiyou County, California. It took effect at Nov 30, 2019, 10:00 AM PST. It was in force for 24 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: Nov 28, 2019, 1:25 PM PST (21:25 UTC)
In effect from: Nov 30, 2019, 10:00 AM PST
Expired: Dec 1, 2019, 10:00 AM PST
In force: 24 hr
Issued by: NWS Medford, OR

County Siskiyou County, CA

The radar

The Medford radar (KMAX), 56 km from the middle of the area, began a volume at 21:30 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

Medford/Jackson, OR (KMFR), launched 12:00Z, 9.4 hours before the alert went out and 89 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: 597 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: -18 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 winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Medford, OR wrote its last area forecast discussion before this winter storm warning went out at Nov 28, 8:57 AM PST, 4 hours 28 minutes earlier.

Area forecast discussion, Nov 28, 8:57 AM PST, 4 hours 28 minutes before

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In the hours before

Local storm report, Nov 28, 8:28 AM PST, 4 hours 57 minutes before

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<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.
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        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 Medford, OR issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 27, 9:23 PM PST	Freeze Warning	MFR	Coos, Curry, Douglas	12 hr
Nov 28, 2:30 PM PST	Small Craft Advisory	MFR		4 days
Nov 28, 2:30 PM PST	Hazardous Seas Watch	MFR		36 hr
Nov 28, 2:56 PM PST	Freeze Warning	MFR	Coos, Curry, Douglas	19 hr

Nearby

Winter Storm Warnings in California, 2019 Every winter storm warning 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.