Alert archive / Montana / Flash Flood Warnings in 2019

Flash Flood Warning 10, NWS Billings, MT

July 8, 2019Carter County, Fallon County, Montana

NWS Billings, MT issued this flash flood warning at Jul 8, 2019, 8:44 PM MDT for Carter County, Fallon County, Montana. It was in force for 6 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
Jul 8, 2019, 8:44 PM MDT (02:44 UTC)
Expired
Jul 9, 2019, 2:45 AM MDT
In force
6 hr
Issued by
NWS Billings, MT
Area
Storm-based polygon
Flood severity
None

Counties Carter County, MT, Fallon County, MT

The radar

The Rapid City radar (KUDX), 238 km from the middle of the area, began a volume at 02:43 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.7 hours before the alert went out and 305 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, Bismarck Municip, ND at 00:00Z on 2019-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 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, Bismarck Municip, ND at 00:00Z on 2019-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.193958Sfc1 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
1 J/kg
Mixed-layer CIN
-584 J/kg
Mixed-layer LCL
1479 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
65 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 flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Billings, MT wrote its last area forecast discussion before this flash flood warning went out at Jul 8, 8:34 PM MDT, 10 minutes earlier.

Area forecast discussion, Jul 8, 8:34 PM MDT, 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>
Hazardous weather outlook, Jul 8, 5:56 PM MDT, 2 hours 48 minutes before
Hazardous Weather Outlook
National Weather Service Billings MT
556 PM MDT Mon Jul 8 2019

MTZ028>042-056>058-063>068-WYZ098-099-090100-
Southern Wheatland-Musselshell-Treasure-Northern Rosebud-Custer-
Fallon-Northern Stillwater-Yellowstone-Powder River-Carter-
Southern Big Horn-Eastern Carbon-Northern Park-
Northern Sweet Grass-Golden Valley-Red Lodge Foothills-
Northern Big Horn-Southern Rosebud-Judith Gap-Paradise Valley-
Livingston Area-Beartooth Foothills-Absaroka/Beartooth Mountains-
Crazy Mountains-Northeast Bighorn Mountains-Sheridan Foothills-
556 PM MDT Mon Jul 8 2019

This Hazardous Weather Outlook is for portions of central
Montana...south central Montana...southeast Montana and north
central Wyoming.

* WHAT...Possibility of severe thunderstorms.

* WHERE...Southeast Montana.

* WHEN...This evening.

* ADDITIONAL DETAILS...Severe thunderstorms capable of producing
  large hail, damaging winds and very heavy rainfall, are possible
  this afternoon and evening. Be prepared if you have outdoor
  plans.

* ADDITIONAL HAZARD CONCERNS...Very heavy rainfall could cause
  flash flooding. The highest risk of torrential rainfall will be
  east of a line from Hysham to Fort Smith. Do not attempt to cross
  a flooded roadway.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Hazardous Weather Outlook is issued when hazardous weather could
impact the region within the next week. Be sure to stay tuned for
future updates as locations, timing, and impacts could change.
Begin preparations to mitigate any impacts that could result from
the hazardous weather.

&&

In the hours before

Special weather statement, Jul 8, 8:05 PM MDT, 39 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>
Special weather statement, Jul 8, 8:16 PM MDT, 28 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 8, 8:20 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>
Local storm report, Jul 8, 8:22 PM MDT, 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>
Special weather statement, Jul 8, 8:28 PM MDT, 16 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 8, 8:43 PM MDT, 1 minute 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 Billings, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 8, 6:09 PM MDTSpecial Weather StatementBYZRosebud51 min
Jul 8, 6:23 PM MDTSevere Thunderstorm WarningBYZBig Horn, Rosebud52 min
Jul 8, 6:27 PM MDTSevere Thunderstorm WarningBYZBig Horn39 min
Jul 8, 6:31 PM MDTSpecial Weather StatementBYZCarter44 min
Jul 8, 7:12 PM MDTSevere Thunderstorm WarningBYZCarter63 min
Jul 8, 7:13 PM MDTSevere Thunderstorm WarningBYZCuster, Rosebud62 min
Jul 8, 7:17 PM MDTFlash Flood WarningBYZCarter6 hr
Jul 8, 7:37 PM MDTSevere Thunderstorm WarningBYZCarter, Custer, Powder River38 min
Jul 8, 8:05 PM MDTSpecial Weather StatementBYZPowder River40 min
Jul 8, 8:14 PM MDTSevere Thunderstorm WarningBYZCarter, Custer, Fallon, Powder River61 min
Jul 8, 8:16 PM MDTSpecial Weather StatementBYZCuster44 min
Jul 8, 8:21 PM MDTSevere Thunderstorm WarningBYZCuster38 min
Jul 8, 8:28 PM MDTSpecial Weather StatementBYZPowder River32 min
Jul 8, 8:50 PM MDTSevere Thunderstorm WarningBYZCarter, Powder River40 min
Jul 8, 8:59 PM MDTSpecial Weather StatementBYZFallon16 min
Jul 8, 9:12 PM MDTSpecial Weather StatementBYZFallon48 min
Jul 8, 9:15 PM MDTSevere Thunderstorm WarningBYZFallon60 min
Jul 8, 10:10 PM MDTSpecial Weather StatementBYZFallon50 min
Jul 8, 11:01 PM MDTSpecial Weather StatementBYZRosebud119 min
Jul 8, 11:09 PM MDTSpecial Weather StatementBYZFallon51 min
Jul 9, 12:50 AM MDTSpecial Weather StatementBYZFallon55 min
Jul 9, 11:29 AM MDTSpecial Weather StatementBYZCarbon46 min
Jul 9, 11:32 AM MDTSpecial Weather StatementBYZYellowstone43 min
Jul 9, 12:50 PM MDTSpecial Weather StatementBYZYellowstone40 min
Jul 9, 1:35 PM MDTSpecial Weather StatementBYZ40 min
Jul 9, 2:57 PM MDTSpecial Weather StatementBYZBig Horn33 min
Jul 8, 6:15 PM MDTSevere Thunderstorm WarningBYZSheridan45 min
Jul 8, 6:37 PM MDTSevere Thunderstorm WarningBYZSheridan53 min
Jul 8, 7:18 PM MDTSevere Thunderstorm WarningBYZSheridan42 min

Nearby

Flash Flood Warnings in Montana, 2019Every flash flood 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.