Alert archive / Montana / Flash Flood Watches in 2013
Flash Flood Watch 3, NWS Missoula, MT
NWS Missoula, MT issued this flash flood watch at Sep 5, 2013, 9:42 AM MDT for 7 counties in Montana; Idaho County, Lemhi County, Idaho. It took effect at Sep 5, 2013, 10:00 AM MDT. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Sep 5, 2013, 9:42 AM MDT (15:42 UTC)
- In effect from
- Sep 5, 2013, 10:00 AM MDT
- Expired
- Sep 5, 2013, 9:00 PM MDT
- In force
- 11 hr
- Issued by
- NWS Missoula, MT
- Flood severity
- None
Counties Idaho County, ID, Lemhi County, ID, Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Mineral County, MT, Missoula County, MT, Sanders County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 51 km from the middle of the area, began a volume at 15:45 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
Spokane, WA (KOTX), launched 12:00Z, 3.7 hours before the alert went out and 215 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
- 8 J/kg
- Mixed-layer CIN
- -278 J/kg
- Mixed-layer LCL
- 1660 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- -87 m²/s²
- 0-3 km storm-relative helicity
- -18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Missoula, MT wrote its last area forecast discussion before this flash flood watch went out at Sep 5, 3:43 AM MDT, 5 hours 59 minutes earlier.
Area forecast discussion, Sep 5, 3:43 AM MDT, 5 hours 59 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 Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 11:27 AM MDT | Areal Flood Advisory | MSO | Ravalli | 3 hr |
| Sep 5, 1:14 PM MDT | Areal Flood Advisory | MSO | Deer Lodge, Granite, Powell | 3 hr |
| Sep 5, 1:45 PM MDT | Areal Flood Advisory | MSO | Powell | 2 hr |
| Sep 4, 6:45 PM MDT | Areal Flood Advisory | MSO | Idaho | 3 hr |
| Sep 4, 9:55 PM MDT | Flash Flood Warning | MSO | Lemhi | 2 hr |
| Sep 5, 5:34 PM MDT | Special Weather Statement | MSO | Lemhi | 41 min |
| Sep 5, 5:58 PM MDT | Areal Flood Advisory | MSO | Lemhi | 2 hr |
Nearby
Flash Flood Watches in Montana, 2013Flash Flood Watches in Idaho, 2013Every flash flood watch in 2013
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.