Alert archive / Oregon / Winter Storm Watches in 2011

Winter Storm Watch 1, NWS Medford, OR

February 12, 20115 counties in Oregon; Modoc County, Siskiyou County, California

NWS Medford, OR issued this winter storm watch at Feb 12, 2011, 2:32 PM PST for 5 counties in Oregon; Modoc County, Siskiyou County, California. It took effect at Feb 14, 2011, 4:00 PM PST. It was in force for .

The area

The counties it named.

The facts

Issued
Feb 12, 2011, 2:32 PM PST (22:32 UTC)
In effect from
Feb 14, 2011, 4:00 PM PST
Expired
Feb 14, 2011, 3:00 AM PST
In force
Issued by
NWS Medford, OR

Counties Modoc County, CA, Siskiyou County, CA, Douglas County, OR, Jackson County, OR, Josephine County, OR, Klamath County, OR, Lake County, OR

The radar

The Medford radar (KMAX), 61 km from the middle of the area, began a volume at 22:37 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

Reno, NV (KREV), launched 12:00Z, 10.5 hours before the alert went out and 454 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, Reno, NV at 12:00Z on 2011-02-12Temperature 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, Reno, NV at 12:00Z on 2011-02-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.193958Sfc1 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
3391 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
107 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 watch 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 watch went out at Feb 12, 8:46 AM PST, 5 hours 46 minutes earlier.

Area forecast discussion, Feb 12, 8:46 AM PST, 5 hours 46 minutes before
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Hazardous weather outlook, Feb 12, 1:46 PM PST, 46 minutes before
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</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.

IssuedProductOfficeCountiesLasted
Feb 12, 2:25 AM PSTGale WatchMFR24 hr
Feb 12, 2:25 AM PSTSmall Craft Advisory for WindsMFR24 hr
Feb 12, 2:25 AM PSTSmall Craft Advisory for Hazardous SeasMFR46 hr
Feb 12, 3:04 AM PSTHigh Wind WatchMFRCoos, Curry, Douglas, Jackson, Klamath, Lake24 hr
Feb 12, 8:59 AM PSTHazardous Seas WatchMFR17 hr
Feb 12, 12:58 PM PSTWind AdvisoryMFRSiskiyou6 hr

Nearby

Winter Storm Watches in Oregon, 2011Winter Storm Watches in California, 2011Every winter storm watch in 2011

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.