Alert archive / Washington / Flash Flood Warnings in 1997

Flash Flood Warning 35, NWS Pendleton, OR

May 31, 1997Columbia County, Washington

NWS Pendleton, OR issued this flash flood warning at May 31, 1997, 2:25 PM PDT for Columbia County, Washington. It was in force for 110 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: May 31, 1997, 2:25 PM PDT (21:25 UTC)
Expired: May 31, 1997, 4:15 PM PDT
In force: 110 min
Issued by: NWS Pendleton, OR
Area: Whole counties

County Columbia County, WA

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 9.4 hours before the alert went out and 193 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: 11 J/kg
Mixed-layer CIN: -225 J/kg
Mixed-layer LCL: 1213 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at May 31, 2:15 PM PDT, 10 minutes earlier.

Area forecast discussion, May 31, 2:15 PM PDT, 10 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
May 30, 10:20 PM PDT	Severe Thunderstorm Warning	PDT	Union	40 min
May 31, 12:27 AM PDT	Severe Thunderstorm Warning	PDT	Crook, Deschutes, Jefferson	63 min
May 31, 12:55 AM PDT	Severe Thunderstorm Warning	PDT	Wasco	65 min
May 31, 1:35 AM PDT	Severe Thunderstorm Warning	PDT	Gilliam, Sherman	55 min
May 31, 2:26 AM PDT	Flash Flood Warning	PDT	Morrow	64 min
May 31, 2:26 AM PDT	Severe Thunderstorm Warning	PDT	Morrow	64 min
May 31, 3:05 AM PDT	Flash Flood Warning	PDT	Umatilla	85 min
May 31, 3:05 AM PDT	Severe Thunderstorm Warning	PDT	Umatilla	85 min
May 31, 8:41 AM PDT	Flash Flood Warning	PDT	Crook, Jefferson	2 hr
May 31, 9:10 AM PDT	Severe Thunderstorm Warning	PDT	Gilliam, Sherman, Wasco	65 min
May 31, 9:10 AM PDT	Severe Thunderstorm Warning	PDT	Jefferson	65 min
May 31, 9:25 AM PDT	Severe Thunderstorm Warning	PDT	Gilliam, Morrow	65 min
May 31, 9:25 AM PDT	Severe Thunderstorm Warning	PDT	Sherman	65 min
May 31, 9:39 AM PDT	Severe Thunderstorm Warning	PDT	Crook, Deschutes, Jefferson	66 min
May 31, 10:28 AM PDT	Severe Thunderstorm Warning	PDT	Morrow, Umatilla	62 min
May 31, 10:55 AM PDT	Severe Thunderstorm Warning	PDT	Crook	65 min
May 31, 10:58 AM PDT	Severe Thunderstorm Warning	PDT	Morrow	62 min
May 31, 11:25 AM PDT	Severe Thunderstorm Warning	PDT	Morrow, Umatilla	65 min
May 31, 11:45 AM PDT	Flash Flood Warning	PDT	Morrow	2 hr
May 31, 12:25 PM PDT	Severe Thunderstorm Warning	PDT	Umatilla	50 min
May 31, 1:05 PM PDT	Severe Thunderstorm Warning	PDT	Union	55 min
May 31, 1:06 PM PDT	Severe Thunderstorm Warning	PDT	Union	54 min
May 31, 1:10 PM PDT	Severe Thunderstorm Warning	PDT	Union	50 min
May 31, 1:15 PM PDT	Severe Thunderstorm Warning	PDT	Umatilla	60 min
May 31, 1:25 PM PDT	Flash Flood Warning	PDT	Umatilla	2 hr
May 31, 2:29 PM PDT	Severe Thunderstorm Warning	PDT	Wallowa	61 min
May 31, 9:48 AM PDT	Severe Thunderstorm Warning	PDT	Benton, Klickitat	57 min
May 31, 11:54 AM PDT	Severe Thunderstorm Warning	PDT	Columbia, Walla Walla	51 min

Nearby

Flash Flood Warnings in Washington, 1997 Every flash flood warning in 1997

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.