Alert archive / Montana / Special Weather Statements in 2017
Special Weather Statement, NWS Missoula, MT
NWS Missoula, MT issued this special weather statement at Jul 10, 2017, 7:29 PM MDT for Silver Bow County, Montana. It was in force for 16 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 10, 2017, 7:29 PM MDT (01:29 UTC)
- Expired
- Jul 10, 2017, 7:45 PM MDT
- In force
- 16 min
- Issued by
- NWS Missoula, MT
County Silver Bow County, MT
The radar
The Missoula radar (KMSX), 192 km from the middle of the area, began a volume at 01:31 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
Great_falls, MT (KTFX), launched 00:00Z, 1.5 hours before the alert went out and 227 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
- 71 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 2953 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -48 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
<!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>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Jul 10, 2:08 PM MDT, 5 hours 21 minutes earlier.
Area forecast discussion, Jul 10, 2:08 PM MDT, 5 hours 21 minutes before
Area Forecast Discussion National Weather Service Missoula MT 208 PM MDT Mon Jul 10 2017 .DISCUSSION...An approaching disturbance is causing the strong ridge of high pressure to finally break down. This feature is also the kicker for convection across Lemhi county into southwest Montana. The combination of significant instability and more wind shear will contribute to stronger storms across the aforementioned region. These storms will be capable of hail, gusty winds and brief heavy rain. A few showers will linger throughout the night along the Continental Divide. Westerly flow will persist over the northern Rockies through Tuesday keeping the temperatures cooler to near normal readings. The heatwave returns by Wednesday, and will last through the weekend and into early next week. In fact, each day will warm by 5 to 7 degrees or so, with Friday, Saturday, and Sunday topping out as the hottest days during this particular stretch. Temperatures will have the potential to reach 100 degrees in valleys across western Montana and central Idaho on Friday, with an even greater chance of hitting 100 degrees, or slightly higher (102-105F), both Saturday and Sunday. With such strong high pressure locked in place across the western half of the United States, our forecast models show no foreseeable break in this hot and dry pattern through at least July 20th. && .AVIATION... Scattered to numerous showers and thunderstorms will continue to develop across Lemhi county into southwest Montana. A few of these storms could become fairly strong, producing gusty winds, hail and brief heavy rain. KSMN and KBTM have the best chance of being impacted by these storms through 11/03z. A few showers will be traversing northwest Montana this afternoon and evening, but having a minimal impact to KGPI. A few showers could linger along the Continental Divide throughout the night. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...None. &&
In the hours before
Special weather statement, Jul 10, 4:20 PM MDT, 3 hours 9 minutes before
Special Weather Statement
National Weather Service Missoula MT
420 PM MDT MON JUL 10 2017
MTZ007-102245-
Butte/Blackfoot Region MT-
420 PM MDT MON JUL 10 2017
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SILVER BOW COUNTY UNTIL
445 PM MDT...
At 419 PM MDT, Doppler radar was tracking a strong thunderstorm near
Silver Bow, or 7 miles southwest of Butte, moving northeast at 35
mph.
Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.
Locations impacted include...
Butte, Silver Bow, Walkerville, Janney, Newcomb and Nissler.
LAT...LON 4586 11243 4579 11263 4594 11278 4612 11251
4610 11247 4607 11247 4605 11248 4602 11244
4593 11244 4593 11242 4589 11240
TIME...MOT...LOC 2219Z 234DEG 31KT 4592 11262Local storm report, Jul 10, 4:37 PM MDT, 2 hours 52 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 10, 4:51 PM MDT, 2 hours 38 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 10, 5:04 PM MDT, 2 hours 25 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 10, 5:38 PM MDT, 1 hour 51 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 10, 5:45 PM MDT, 1 hour 44 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 |
|---|---|---|---|---|
| Jul 10, 6:23 PM MDT | Special Weather Statement | MSO | Granite | 37 min |
| Jul 10, 6:58 PM MDT | Special Weather Statement | MSO | Powell | 47 min |
| Jul 10, 7:25 PM MDT | Special Weather Statement | MSO | Powell | 20 min |
| Jul 10, 7:44 PM MDT | Special Weather Statement | MSO | Powell | 16 min |
Nearby
Special Weather Statements in Montana, 2017Every special weather statement in 2017
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.