Alert archive / Oregon / Freeze Warnings in 2017

Freeze Warning 1, NWS Medford, OR

January 4, 2017Coos County, Curry County, Douglas County, Oregon

NWS Medford, OR issued this freeze warning at Jan 4, 2017, 2:52 AM PST for Coos County, Curry County, Douglas County, Oregon. It took effect at Jan 4, 2017, 10:00 PM PST. It was in force for 12 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
Jan 4, 2017, 2:52 AM PST (10:52 UTC)
In effect from
Jan 4, 2017, 10:00 PM PST
Expired
Jan 5, 2017, 10:00 AM PST
In force
12 hr
Issued by
NWS Medford, OR

Counties Coos County, OR, Curry County, OR, Douglas County, OR

The radar

The Medford radar (KMAX), 135 km from the middle of the area, began a volume at 10:55 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 00:00Z, 10.9 hours before the alert went out and 108 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, Medford/Jackson, OR at 00:00Z on 2017-01-04Temperature 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 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 00:00Z on 2017-01-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 square meters per square second.1939587897117Sfc1 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
472 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
316 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 freeze 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 freeze warning went out at Jan 3, 9:16 PM PST, 5 hours 36 minutes earlier.

Area forecast discussion, Jan 3, 9:16 PM PST, 5 hours 36 minutes before
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In the hours before

Local storm report, Jan 3, 10:57 PM PST, 3 hours 55 minutes before
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Local storm report, Jan 3, 11:04 PM PST, 3 hours 48 minutes before
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Local storm report, Jan 3, 11:17 PM PST, 3 hours 35 minutes before
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Local storm report, Jan 4, 12:16 AM PST, 2 hours 36 minutes before
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Local storm report, Jan 4, 2:21 AM PST, 31 minutes before
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      <p id="message2">
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Local storm report, Jan 4, 2:24 AM PST, 28 minutes before
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<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.
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The office that day

Everything else NWS Medford, OR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 4, 2:26 PM PSTFreeze WarningMFRCoos, Curry, Douglas44 hr

Nearby

Freeze Warnings in Oregon, 2017Every freeze warning in 2017

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.