Alert archive / Oregon / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 9, NWS Pendleton, OR

August 8, 2019Deschutes County, Oregon

NWS Pendleton, OR issued this severe thunderstorm warning at Aug 8, 2019, 4:02 PM PDT for Deschutes County, Oregon. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 8, 2019, 4:02 PM PDT (23:02 UTC)
Expired
Aug 8, 2019, 4:45 PM PDT
In force
43 min
Issued by
NWS Pendleton, OR
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

County Deschutes County, OR

The radar

The Medford radar (KMAX), 237 km from the middle of the area, began a volume at 23:02 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, 11.0 hours before the alert went out and 214 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 12:00Z on 2019-08-08Temperature 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 12:00Z on 2019-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.1939Sfc1 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
822 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pendleton, OR wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 8, 2:08 PM PDT, 1 hour 54 minutes earlier.

Area forecast discussion, Aug 8, 2:08 PM PDT, 1 hour 54 minutes before
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In the hours before

Special weather statement, Aug 8, 2:59 PM PDT, 1 hour 3 minutes before
Special Weather Statement
National Weather Service Pendleton OR
259 PM PDT Thu Aug 8 2019

WAZ520-082230-
East Slopes of the Washington Cascades WA-
259 PM PDT Thu Aug 8 2019

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL YAKIMA COUNTY UNTIL
330 PM PDT...

At 258 PM PDT, Doppler radar was tracking a strong thunderstorm 10
miles southwest of Rimrock, or 18 miles east of Packwood, moving
northeast at 10 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Rimrock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4655 12141 4657 12142 4658 12140 4662 12139
      4665 12140 4671 12138 4672 12136 4673 12137
      4681 12134 4668 12096 4645 12121 4652 12145
TIME...MOT...LOC 2158Z 203DEG 15KT 4655 12129

DS
Special weather statement, Aug 8, 3:36 PM PDT, 26 minutes before
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<body>
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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.
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Special weather statement, Aug 8, 3:56 PM PDT, 6 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.
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        Please try again in a few minutes.
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Special weather statement, Aug 8, 3:58 PM PDT, 4 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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      <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 Pendleton, OR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 5:12 PM PDTSpecial Weather StatementPDTWheeler63 min
Aug 7, 6:00 PM PDTSpecial Weather StatementPDTSherman30 min
Aug 7, 6:38 PM PDTSpecial Weather StatementPDTSherman37 min
Aug 8, 3:36 PM PDTSpecial Weather StatementPDTCrook39 min
Aug 8, 3:56 PM PDTSpecial Weather StatementPDTDeschutes49 min
Aug 8, 2:59 PM PDTSpecial Weather StatementPDTYakima31 min
Aug 8, 3:53 PM PDTAreal Flood AdvisoryPDTYakima3 hr
Aug 8, 3:58 PM PDTSpecial Weather StatementPDTYakima32 min
Aug 8, 4:15 PM PDTSevere Thunderstorm WarningPDTYakima45 min

Nearby

Severe Thunderstorm Warnings in Oregon, 2019Every severe thunderstorm 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.