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 Jul 5, 2021, 11:12 PM MDT for Toole County, Montana. It was in force for 63 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 5, 2021, 11:12 PM MDT (05:12 UTC)
- Expired
- Jul 6, 2021, 12:15 AM MDT
- In force
- 63 min
- Issued by
- NWS Great Falls, MT
County Toole County, MT
The radar
The Great Falls radar (KTFX), 135 km from the middle of the area, began a volume at 05:14 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, 5.2 hours before the alert went out and 150 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
- 435 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 1792 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
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 Jul 5, 9:24 PM MDT, 1 hour 48 minutes earlier.
Area forecast discussion, Jul 5, 9:24 PM MDT, 1 hour 48 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, Jul 5, 6:29 PM MDT, 4 hours 43 minutes before
Special Weather Statement
National Weather Service Great Falls MT
629 PM MDT Mon Jul 5 2021
MTZ008-015-055-060100-
Madison-Beaverhead-Gallatin-
629 PM MDT Mon Jul 5 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL
MADISON...CENTRAL BEAVERHEAD...AND NORTHERN GALLATIN COUNTIES...
At 628 PM MDT, radar indicated strong thunderstorms were located
along a line extending from 6 miles northeast of Three Forks to 8
miles north of Ennis to 9 miles southeast of Dillon. Movement was
east at 25 mph.
Winds in excess of 30 mph and brief heavy rain are possible with
these storms.
Locations impacted include...
Bozeman, Virginia City, Belgrade, Three Forks, Manhattan, Ennis,
Alder, Harrison, Big Sky, Cameron, Missouri Headwaters State Park,
Four Corners, Amsterdam, Jeffers, Trident, Madison Buffalo Jump State
Park, Norris, Mcallister, Bozeman Hot Springs and Gallatin Gateway.
This includes the following highways...
Interstate 15 between mile markers 55 and 58 .
Interstate 90 between mile markers 277 and 309.
Highway 191 between mile markers 45 and 87.
Highway 287 between mile markers 28 and 76, and between mile markers
90 and 97.
If outdoors, consider seeking shelter inside a building.
LAT...LON 4513 11278 4549 11191 4580 11174 4580 11171
4590 11160 4596 11147 4599 11147 4600 11141
4602 11143 4606 11142 4598 11091 4527 11114
4482 11220
TIME...MOT...LOC 0028Z 285DEG 21KT 4595 11146 4546 11178 4509 11255
SCSpecial weather statement, Jul 5, 7:04 PM MDT, 4 hours 8 minutes before
Special Weather Statement
National Weather Service Great Falls MT
704 PM MDT Mon Jul 5 2021
MTZ008-015-055-060130-
Madison-Beaverhead-Gallatin-
704 PM MDT Mon Jul 5 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN MADISON...
SOUTHEASTERN BEAVERHEAD AND CENTRAL GALLATIN COUNTIES...
At 703 PM MDT, radar indicated strong thunderstorms were located
along a line extending from near Belgrade to 8 miles southwest of
Monida. Movement was southeast at 30 mph.
Winds in excess of 30 mph and brief heavy rain are possible with
these storms.
Locations impacted include...
Bozeman, Belgrade, Monida, Big Sky, Bozeman Hot Springs, Lakeview,
Yellowstone Village, Gallatin Gateway, Cameron, Raynolds Pass, Red
Rock Pass, Four Corners and Monida Pass.
This includes the following highways...
Interstate 15 between mile markers 1 and 4 .
Interstate 90 between mile markers 297 and 321.
Highway 191 between mile markers 31 and 87.
Highway 287 between mile markers 1 and 44.
If outdoors, consider seeking shelter inside a building.
LAT...LON 4446 11251 4581 11118 4566 11079 4552 11092
4536 11092 4535 11104 4508 11104 4511 11110
4505 11115 4484 11110 4467 11127 4473 11132
4470 11149 4453 11151 4451 11182 4456 11187
4452 11211 4457 11229 4445 11239
TIME...MOT...LOC 0103Z 303DEG 27KT 4573 11119 4446 11242
SCSpecial weather statement, Jul 5, 7:45 PM MDT, 3 hours 27 minutes before
Special Weather Statement
National Weather Service Great Falls MT
745 PM MDT Mon Jul 5 2021
MTZ008-060200-
Beaverhead-
745 PM MDT Mon Jul 5 2021
...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN BEAVERHEAD
COUNTY...
At 745 PM MDT, a strong thunderstorm was located 14 miles north of
Kilgore, or 17 miles north of Idmon, moving southeast at 30 mph.
Winds in excess of 30 mph and brief heavy rain are possible with
this storm.
Locations impacted include...
Lakeview.
If outdoors, consider seeking shelter inside a building.
LAT...LON 4456 11187 4456 11195 4459 11199 4472 11181
4455 11148 4453 11151 4455 11152 4456 11159
4455 11161 4456 11171 4452 11176 4452 11181
4451 11182
TIME...MOT...LOC 0145Z 314DEG 27KT 4461 11184
SCSpecial weather statement, Jul 5, 7:47 PM MDT, 3 hours 25 minutes before
Special Weather Statement National Weather Service Great Falls MT 747 PM MDT Mon Jul 5 2021 MTZ008-015-060215- Madison-Beaverhead- 747 PM MDT Mon Jul 5 2021 ...A STRONG THUNDERSTORM WILL AFFECT WEST CENTRAL MADISON AND NORTHEASTERN BEAVERHEAD COUNTIES... At 746 PM MDT, a strong thunderstorm was located near Dillon, moving east at 20 mph. Winds in excess of 30 mph and brief heavy rain are possible with this storm. Locations impacted include... Dillon. This includes Interstate 15 between mile markers 62 and 71 . If outdoors, consider seeking shelter inside a building. LAT...LON 4521 11272 4539 11268 4538 11223 4512 11229 TIME...MOT...LOC 0146Z 278DEG 17KT 4529 11260 SC
Special weather statement, Jul 5, 9:16 PM MDT, 1 hour 56 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 5, 11:12 PM MDT, 0 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 Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 6:29 PM MDT | Special Weather Statement | TFX | Gallatin, Madison | 31 min |
| Jul 5, 7:04 PM MDT | Special Weather Statement | TFX | Gallatin | 26 min |
| Jul 5, 7:47 PM MDT | Special Weather Statement | TFX | Beaverhead | 28 min |
| Jul 5, 9:16 PM MDT | Special Weather Statement | TFX | Glacier | 44 min |
| Jul 5, 9:57 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 33 min |
| Jul 5, 10:25 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 50 min |
| Jul 6, 12:14 AM MDT | Special Weather Statement | TFX | Liberty | 61 min |
| Jul 6, 12:42 AM MDT | Special Weather Statement | TFX | Chouteau | 33 min |
| Jul 6, 1:15 AM MDT | Special Weather Statement | TFX | Liberty | 60 min |
| Jul 6, 1:18 AM MDT | Special Weather Statement | TFX | Chouteau | 27 min |
| Jul 6, 1:44 AM MDT | Special Weather Statement | TFX | Chouteau | 46 min |
| Jul 6, 2:22 AM MDT | Special Weather Statement | TFX | Chouteau | 38 min |
| Jul 6, 3:00 AM MDT | Special Weather Statement | TFX | Chouteau | 45 min |
| Jul 6, 3:42 AM MDT | Special Weather Statement | TFX | Fergus | 33 min |
| Jul 6, 4:15 AM MDT | Special Weather Statement | TFX | Fergus | 45 min |
| Jul 6, 3:37 PM MDT | Special Weather Statement | TFX | Glacier | 23 min |
| Jul 6, 3:55 PM MDT | Special Weather Statement | TFX | Glacier | 35 min |
| Jul 6, 4:21 PM MDT | Special Weather Statement | TFX | Glacier | 24 min |
| Jul 6, 4:27 PM MDT | Special Weather Statement | TFX | Musselshell | 33 min |
| Jul 6, 4:37 PM MDT | Special Weather Statement | TFX | Fergus | 23 min |
| Jul 6, 4:40 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 35 min |
| Jul 6, 4:42 PM MDT | Special Weather Statement | TFX | Blaine | 33 min |
| Jul 6, 5:14 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 31 min |
| Jul 6, 5:15 PM MDT | Special Weather Statement | TFX | Blaine | 30 min |
| Jul 6, 5:45 PM MDT | Special Weather Statement | TFX | Toole | 30 min |
| Jul 6, 5:46 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 29 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.