Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 10, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Jun 21, 2020, 12:00 PM CDT for Saint Louis County, Minnesota. 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
- Jun 21, 2020, 12:00 PM CDT (17:00 UTC)
- Expired
- Jun 21, 2020, 12:45 PM CDT
- In force
- 45 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Saint Louis County, MN
The radar
The Duluth radar (KDLH), 86 km from the middle of the area, began a volume at 17:01 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
International Fa, MN (KINL), launched 12:00Z, 5.0 hours before the alert went out and 126 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
- 111 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 973 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 Duluth, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 21, 6:52 AM CDT, 5 hours 8 minutes earlier.
Area forecast discussion, Jun 21, 6:52 AM CDT, 5 hours 8 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, Jun 21, 3:51 AM CDT, 8 hours 9 minutes before
Hazardous Weather Outlook National Weather Service Duluth MN 351 AM CDT Sun Jun 21 2020 MNZ010>012-018>021-025-026-033>038-WIZ003-004-006-009-220900- Koochiching-North St. Louis-Northern Cook/Northern Lake- North Itasca-Central St. Louis-Southern Lake/North Shore- Southern Cook/North Shore-North Cass-South Itasca-South Cass- Crow Wing-Northern Aitkin-South Aitkin-Carlton/South St. Louis- Pine-Ashland-Iron-Burnett-Price- 351 AM CDT Sun Jun 21 2020 This Hazardous Weather Outlook is for portions of northeast Minnesota and northwest Wisconsin. .DAY ONE...Today and Tonight Chances of thunderstorms will increase this afternoon and continue through the overnight hours tonight. An isolated strong to severe storm will be possible, for areas along and south of a line from Brainerd, MN to Carlton, MN to Mercer, WI. Large hail and damaging winds are the main threats. .DAYS TWO THROUGH SEVEN...Monday through Saturday There will be continued low chances for thunderstorms for Monday through Wednesday. .SPOTTER INFORMATION STATEMENT... Skywarn spotters may be needed this afternoon and evening. WIZ001-002-007-008-220900- Douglas-Bayfield-Washburn-Sawyer- 351 AM CDT Sun Jun 21 2020 This Hazardous Weather Outlook is for portions of northwest Wisconsin. .DAY ONE...Today and Tonight Dense fog has developed early this morning for these areas of northwest Wisconsin. A Dense Fog Advisory has been issued. The fog is expected to dissipate between 8 to 9 AM. Chances of thunderstorms will increase this afternoon and continue through the overnight hours tonight. An isolated strong to severe storm will be possible, for areas along and south of a line from Brainerd, MN to Carlton, MN to Mercer, WI. Large hail and damaging winds are the main threats. .DAYS TWO THROUGH SEVEN...Monday through Saturday There will be continued low chances for thunderstorms for Monday through Wednesday. .SPOTTER INFORMATION STATEMENT... Skywarn spotters may be needed this afternoon and evening. LSZ121-140>148-220900- Bayfield to Oak Point WI-Grand Portage to Grand Marais MN- Grand Marais to Taconite Harbor MN- Taconite Harbor to Silver Bay Harbor MN- Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN- Duluth MN to Port Wing WI-Port Wing to Sand Island WI- Sand Island to Bayfield WI-Oak Point to Saxon Harbor WI- 351 AM CDT Sun Jun 21 2020 This Hazardous Weather Outlook is for portions of the Nearshore waters of western Lake Superior. .DAY ONE...Today and Tonight Chances of thunderstorms will return across western Lake Superior this afternoon and evening. A strong storm will be possible, but severe storms appear to be unlikely. .DAYS TWO THROUGH SEVEN...Monday through Saturday There will be low chances for thunderstorms for Tuesday and Wednesday. JTS More information may be obtained at the following web address: http://www.weather.gov/duluth (all lower case)
In the hours before
Special weather statement, Jun 21, 11:34 AM CDT, 26 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 Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 11:34 AM CDT | Special Weather Statement | DLH | Saint Louis | 26 min |
| Jun 21, 12:30 PM CDT | Special Weather Statement | DLH | Carlton | 30 min |
| Jun 21, 12:51 PM CDT | Special Weather Statement | DLH | Lake | 9 min |
| Jun 21, 12:56 PM CDT | Special Weather Statement | DLH | 19 min | |
| Jun 21, 1:15 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 15 min |
| Jun 21, 1:27 PM CDT | Special Marine Warning | DLH | 18 min | |
| Jun 21, 1:36 PM CDT | Special Weather Statement | DLH | Lake | 24 min |
| Jun 21, 1:46 PM CDT | Special Marine Warning | DLH | 44 min | |
| Jun 21, 1:55 PM CDT | Special Weather Statement | DLH | 35 min | |
| Jun 21, 2:57 PM CDT | Special Marine Warning | DLH | 63 min | |
| Jun 21, 3:43 PM CDT | Special Weather Statement | DLH | Lake | 32 min |
| Jun 21, 4:33 PM CDT | Special Weather Statement | DLH | Saint Louis | 27 min |
| Jun 21, 4:51 PM CDT | Special Weather Statement | DLH | Saint Louis | 24 min |
| Jun 21, 5:12 PM CDT | Special Weather Statement | DLH | Lake | 33 min |
| Jun 21, 3:04 AM CDT | Dense Fog Advisory | DLH | Bayfield, Douglas, Sawyer, Washburn | 6 hr |
| Jun 21, 1:39 PM CDT | Special Weather Statement | DLH | Washburn | 21 min |
| Jun 21, 2:01 PM CDT | Special Weather Statement | DLH | Douglas | 29 min |
| Jun 21, 2:31 PM CDT | Special Weather Statement | DLH | Bayfield | 29 min |
| Jun 21, 2:34 PM CDT | Special Weather Statement | DLH | Bayfield | 26 min |
| Jun 21, 2:54 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 36 min |
| Jun 21, 3:02 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield, Douglas | 28 min |
| Jun 21, 3:09 PM CDT | Special Weather Statement | DLH | Sawyer | 36 min |
| Jun 21, 3:32 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Sawyer | 28 min |
| Jun 21, 3:54 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Price, Sawyer | 51 min |
| Jun 21, 4:11 PM CDT | Special Weather Statement | DLH | Ashland | 34 min |
| Jun 21, 5:35 PM CDT | Special Weather Statement | DLH | Sawyer | 25 min |
| Jun 21, 6:31 PM CDT | Special Weather Statement | DLH | Ashland | 29 min |
| Jun 21, 6:38 PM CDT | Special Weather Statement | DLH | Iron | 37 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 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.