Alert archive / Montana / Special Weather Statements in 2021
Special Weather Statement, NWS Great Falls, MT
NWS Great Falls, MT issued this special weather statement at Aug 25, 2021, 6:34 PM MDT for Madison County, Montana. It was in force for 26 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
- Aug 25, 2021, 6:34 PM MDT (00:34 UTC)
- Expired
- Aug 25, 2021, 7:00 PM MDT
- In force
- 26 min
- Issued by
- NWS Great Falls, MT
- Hail
- 0.00 in
- Wind
- 40
County Madison County, MT
The radar
The Pocatello radar (KSFX), 242 km from the middle of the area, began a volume at 00:37 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, 0.6 hours before the alert went out and 270 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
- 2310 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 110 m²/s²
- 0-3 km storm-relative helicity
- 191 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Great Falls, MT wrote its last area forecast discussion before this special weather statement went out at Aug 25, 5:45 PM MDT, 49 minutes earlier.
Area forecast discussion, Aug 25, 5:45 PM MDT, 49 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>In the hours before
Special weather statement, Aug 25, 4:31 PM MDT, 2 hours 3 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, Aug 25, 5:00 PM MDT, 1 hour 34 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, Aug 25, 6:27 PM MDT, 7 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, Aug 25, 6:34 PM MDT, 0 minutes before
Special Weather Statement
National Weather Service Great Falls MT
634 PM MDT Wed Aug 25 2021
MTZ015-260100-
Madison MT-
634 PM MDT Wed Aug 25 2021
...A strong thunderstorm will impact portions of central Madison
County through 700 PM MDT...
At 633 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles south of Virginia City, moving northeast at 10 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Erratic gusty winds could knock down tree limbs and blow
around unsecured objects.
Locations impacted include...
Virginia City.
This includes Highway 287 between mile markers 40 and 43.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4510 11193 4516 11211 4543 11199 4525 11162
TIME...MOT...LOC 0033Z 224DEG 10KT 4518 11200
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
JAFThe office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 6:27 PM MDT | Special Weather Statement | TFX | Jefferson | 48 min |
| Aug 25, 8:26 PM MDT | Special Weather Statement | TFX | Madison | 34 min |
| Aug 25, 8:32 PM MDT | Special Weather Statement | TFX | Meagher | 28 min |
| Aug 26, 1:10 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 35 min |
| Aug 26, 1:46 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 29 min |
| Aug 26, 2:04 PM MDT | Special Weather Statement | TFX | Cascade | 26 min |
| Aug 26, 2:26 PM MDT | Special Weather Statement | TFX | Fergus | 34 min |
| Aug 26, 2:58 PM MDT | Special Weather Statement | TFX | Fergus | 47 min |
| Aug 26, 3:32 PM MDT | Special Weather Statement | TFX | Judith Basin | 28 min |
| Aug 26, 3:57 PM MDT | Special Weather Statement | TFX | Judith Basin | 33 min |
| Aug 26, 4:11 PM MDT | Special Weather Statement | TFX | Fergus | 34 min |
| Aug 26, 4:20 PM MDT | Special Weather Statement | TFX | Blaine | 25 min |
| Aug 26, 4:31 PM MDT | Special Weather Statement | TFX | Chouteau | 29 min |
| Aug 26, 4:33 PM MDT | Special Weather Statement | TFX | Fergus | 27 min |
| Aug 26, 4:44 PM MDT | Special Weather Statement | TFX | Fergus | 31 min |
| Aug 26, 4:58 PM MDT | Special Weather Statement | TFX | Fergus | 32 min |
| Aug 26, 5:10 PM MDT | Special Weather Statement | TFX | Fergus | 35 min |
| Aug 26, 5:16 PM MDT | Special Weather Statement | TFX | Chouteau | 29 min |
| Aug 26, 5:42 PM MDT | Special Weather Statement | TFX | Fergus | 33 min |
Nearby
Special Weather Statements in Montana, 2021Every special weather statement in 2021
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.