Alert archive / Oregon / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 7, NWS Pendleton, OR

July 2, 2022Umatilla County, Union County, Oregon

NWS Pendleton, OR issued this severe thunderstorm warning at Jul 2, 2022, 3:15 PM PDT for Umatilla County, Union County, Oregon. It was in force for 45 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: Jul 2, 2022, 3:15 PM PDT (22:15 UTC)
Expired: Jul 2, 2022, 4:00 PM PDT
In force: 45 min
Issued by: NWS Pendleton, OR
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Umatilla County, OR, Union County, OR

The radar

The Pendleton radar (KPDT), 46 km from the middle of the area, began a volume at 22:18 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

Boise Airport, ID (KBOI), launched 12:00Z, 10.3 hours before the alert went out and 271 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: 3043 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 61 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 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 Jul 2, 1:53 PM PDT, 1 hour 22 minutes earlier.

Area forecast discussion, Jul 2, 1:53 PM PDT, 1 hour 22 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>

In the hours before

Special weather statement, Jul 2, 2:20 PM PDT, 55 minutes before

Special Weather Statement
National Weather Service Pendleton OR
220 PM PDT Sat Jul 2 2022

ORZ049-050-502-503-022200-
Grande Ronde Valley OR-Southern Blue Mountains of Oregon OR-
Northern Blue Mountains of Oregon OR-Wallowa County OR-
220 PM PDT Sat Jul 2 2022

...A strong thunderstorm will impact portions of southeastern
Umatilla and southwestern Union Counties through 300 PM PDT...

At 220 PM PDT, Doppler radar was tracking a strong thunderstorm 8
miles south of Starkey, or 21 miles southwest of La Grande, moving
north at 20 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
La Grande, Meacham, Union, Island City, Cove, Telocaset, Kamela,
Hilgard, Starkey and southern Umatilla Reservation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4506 11785 4507 11787 4499 11797 4500 11803
      4505 11811 4504 11814 4502 11816 4501 11821
      4495 11825 4496 11868 4544 11860 4545 11858
      4557 11858 4535 11768
TIME...MOT...LOC 2120Z 193DEG 19KT 4511 11840

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

VP

Special weather statement, Jul 2, 2:53 PM PDT, 22 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>

Local storm report, Jul 2, 3:01 PM PDT, 14 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>

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 2:20 PM PDT	Special Weather Statement	PDT	Union	40 min
Jul 2, 2:26 PM PDT	Severe Thunderstorm Warning	PDT	Umatilla, Union	49 min
Jul 2, 2:53 PM PDT	Special Weather Statement	PDT	Jefferson	37 min
Jul 2, 4:00 PM PDT	Special Weather Statement	PDT	Wallowa	30 min
Jul 2, 4:13 PM PDT	Special Weather Statement	PDT	Umatilla	32 min

Nearby

Severe Thunderstorm Warnings in Oregon, 2022 Every severe thunderstorm warning in 2022

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.