Alert archive / Wyoming / Flash Flood Warnings in 2024

Flash Flood Warning 3, NWS Riverton, WY

June 9, 2024Johnson County, Natrona County, Washakie County, Wyoming

NWS Riverton, WY issued this flash flood warning at Jun 9, 2024, 4:18 PM MDT for Johnson County, Natrona County, Washakie County, Wyoming. It was in force for 3 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
Jun 9, 2024, 4:18 PM MDT (22:18 UTC)
Expired
Jun 9, 2024, 7:15 PM MDT
In force
3 hr
Issued by
NWS Riverton, WY
Area
Storm-based polygon
Flood severity
None

Counties Johnson County, WY, Natrona County, WY, Washakie County, WY

The radar

The Riverton/Lander radar (KRIW), 134 km from the middle of the area, began a volume at 22:21 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.

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 Riverton, WY wrote its last area forecast discussion before this flash flood warning went out at Jun 9, 3:54 PM MDT, 24 minutes earlier.

Area forecast discussion, Jun 9, 3:54 PM MDT, 24 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>
Hazardous weather outlook, Jun 9, 2:25 AM MDT, 13 hours 53 minutes before
Hazardous Weather Outlook
National Weather Service Riverton WY
225 AM MDT Sun Jun 9 2024

WYZ001>020-022>030-101230-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
225 AM MDT Sun Jun 9 2024

...Flood Advisories remain in effect for some rivers and creeks in
central Wyoming...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and tonight.

Showers and thunderstorms becoming widespread this afternoon,
continuing into the evening. Strong to severe thunderstorms are
possible, with severe wind gusts and large hail the main threats.
Locally heavy rain could also occur.

Warm temperatures will lead to increased mountain snowmelt.
Rising streams and rivers may lead to minor flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Warm temperatures will lead to increased mountain snowmelt.
Rising streams and rivers may lead to minor flooding.

Monday...Isolated to scattered (20-30%) showers and thunderstorms
will occur through the afternoon into the evening. Strong to severe
thunderstorms are not expected.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

Nearby

Flash Flood Warnings in Wyoming, 2024Every flash flood warning in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.