Alert archive / North Dakota / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 241, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 7, 2020, 6:45 PM MDT for Grant County, Morton County, North Dakota. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 7, 2020, 6:45 PM MDT (00:45 UTC)
- Expired
- Aug 7, 2020, 7:30 PM MDT
- In force
- 45 min
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Grant County, ND, Morton County, ND
The radar
The Bismarck radar (KBIS), 59 km from the middle of the area, began a volume at 00:47 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
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.8 hours before the alert went out and 64 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
- 2236 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 1957 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.5
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 7, 5:38 PM MDT, 1 hour 7 minutes earlier.
Area forecast discussion, Aug 7, 5:38 PM MDT, 1 hour 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>Hazardous weather outlook, Aug 7, 4:02 PM MDT, 2 hours 43 minutes before
Hazardous Weather Outlook National Weather Service Bismarck ND 502 PM CDT Fri Aug 7 2020 NDZ002>005-010>013-018>023-033>036-041-042-044>047-050-082215- Burke-Renville-Bottineau-Rolette-Mountrail-Ward-McHenry-Pierce- Dunn-Mercer-Oliver-McLean-Sheridan-Wells-Stark-Morton-Burleigh- Kidder-Hettinger-Grant-Adams-Sioux-Emmons-Logan-McIntosh- 502 PM CDT Fri Aug 7 2020 /402 PM MDT Fri Aug 7 2020/ This Hazardous Weather Outlook is for portions of north central North Dakota, northwest North Dakota, south central North Dakota, southeast North Dakota, and southwest North Dakota. .DAY ONE...Tonight Isolated severe thunderstorms are possible through this evening. The main hazards are expected to be up to hail dollar size hail and wind gusts to 60 mph. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Thunderstorms are possible Saturday night and Sunday. Some of these storms could be strong across the James River Valley, with small hail and gusty winds. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report any hail or strong winds to the National Weather Service office in Bismarck at 701-223-4582. NDZ001-009-017-031-032-040-043-082215- Divide-Williams-McKenzie-Golden Valley-Billings-Slope-Bowman- 502 PM CDT Fri Aug 7 2020 /402 PM MDT Fri Aug 7 2020/ This Hazardous Weather Outlook is for portions of northwest North Dakota and southwest North Dakota. .DAY ONE...Tonight The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Thunderstorms are possible Saturday night and Sunday. Severe weather is not expected. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. NDZ025-037-048-051-082215- Foster-Stutsman-La Moure-Dickey- 502 PM CDT Fri Aug 7 2020 This Hazardous Weather Outlook is for portions of southeast North Dakota. .DAY ONE...Tonight Isolated thunderstorms are possible. Some of these storms could be strong, with small hail and gusty winds. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Thunderstorms are possible Saturday night and Sunday. Some of these storms could be strong across the James River Valley, with small hail and gusty winds. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Special weather statement, Aug 7, 5:09 PM MDT, 1 hour 36 minutes before
Special Weather Statement National Weather Service Bismarck ND 609 PM CDT Fri Aug 7 2020 NDZ019-021-072345- Mercer ND-McLean ND- 609 PM CDT Fri Aug 7 2020 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MCLEAN AND NORTHWESTERN MERCER COUNTIES UNTIL 645 PM CDT... At 608 PM CDT, a strong thunderstorm was located 8 miles southwest of Beulah Bay Recreation Area, or 14 miles northwest of Beulah, moving east at 15 mph. Penny size hail and wind gusts to 40 mph will be possible with this storm. This storm may intense further. Locations impacted include... Hazen Bay Recreation Area, Beulah Bay Recreation Area and Dakota Waters Recreation Area. If you are on or near Lake Sakakawea, get out of the water and move indoors or inside a vehicle. Remember, If you can hear thunder, you are close enough to be struck by lightning. Do not be caught on the water in a thunderstorm. && LAT...LON 4734 10199 4752 10205 4764 10162 4737 10157 TIME...MOT...LOC 2308Z 255DEG 13KT 4745 10192 CJS
Local storm report, Aug 7, 5:27 PM MDT, 1 hour 18 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 7, 6:30 PM MDT, 15 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 Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 6:30 PM MDT | Special Weather Statement | BIS | McLean | 30 min |
| Aug 7, 7:04 PM MDT | Special Weather Statement | BIS | McLean | 41 min |
| Aug 7, 7:45 PM MDT | Special Weather Statement | BIS | Morton | 30 min |
| Aug 7, 7:53 PM MDT | Severe Thunderstorm Warning | BIS | Morton | 52 min |
| Aug 7, 8:00 PM MDT | Severe Thunderstorm Warning | BIS | Grant | 45 min |
| Aug 7, 8:22 PM MDT | Special Weather Statement | BIS | Bottineau | 23 min |
| Aug 7, 8:33 PM MDT | Severe Thunderstorm Warning | BIS | Bottineau, McHenry | 42 min |
| Aug 7, 8:47 PM MDT | Special Weather Statement | BIS | Sioux | 28 min |
| Aug 7, 9:02 PM MDT | Severe Thunderstorm Warning | BIS | Grant | 28 min |
| Aug 7, 9:21 PM MDT | Special Weather Statement | BIS | Bottineau | 24 min |
| Aug 7, 9:32 PM MDT | Severe Thunderstorm Warning | BIS | Bottineau | 43 min |
| Aug 8, 4:41 AM MDT | Special Weather Statement | BIS | Adams | 49 min |
| Aug 8, 5:23 AM MDT | Special Weather Statement | BIS | Sioux | 52 min |
| Aug 8, 6:03 AM MDT | Special Weather Statement | BIS | Emmons, Sioux | 42 min |
| Aug 8, 7:38 AM MDT | Special Weather Statement | BIS | Dickey, LaMoure, McIntosh | 37 min |
| Aug 8, 8:19 AM MDT | Special Weather Statement | BIS | Dickey, LaMoure | 26 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 2020Every severe thunderstorm warning in 2020
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.