Alert archive / Montana / Flash Flood Warnings in 1990
Flash Flood Warning 4, NWS Billings, MT
NWS Billings, MT issued this flash flood warning at Aug 20, 1990, 12:53 AM MDT for Golden Valley County, Musselshell County, Montana. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 20, 1990, 12:53 AM MDT (06:53 UTC)
- Expired
- Aug 20, 1990, 3:00 AM MDT
- In force
- 2 hr
- Issued by
- NWS Billings, MT
- Area
- Whole counties
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 6.9 hours before the alert went out and 178 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3601 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
In the hours before
Special weather statement, Aug 19, 9:23 PM MDT, 3 hours 30 minutes before
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</html>Special weather statement, Aug 19, 11:16 PM MDT, 1 hour 37 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 Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 8:50 PM MDT | Flash Flood Warning | BYZ | Golden Valley, Musselshell, Wheatland | 115 min |
| Aug 19, 10:54 PM MDT | Flash Flood Warning | BYZ | Musselshell, Yellowstone | 111 min |
| Aug 20, 3:49 PM MDT | Severe Thunderstorm Warning | BYZ | Stillwater | 56 min |
| Aug 20, 4:47 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley, Stillwater, Yellowstone | 58 min |
| Aug 20, 4:47 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 58 min |
| Aug 20, 5:12 PM MDT | Tornado Warning | BYZ | Yellowstone | 33 min |
Nearby
Flash Flood Warnings in Montana, 1990Every flash flood warning in 1990
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.