Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 138, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Sep 22, 2017, 1:25 AM CDT for Aitkin County, Carlton County, Minnesota. 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 counties it named.
The facts
- Issued
- Sep 22, 2017, 1:25 AM CDT (06:25 UTC)
- Expired
- Sep 22, 2017, 1:51 AM CDT
- In force
- 26 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Aitkin County, MN, Carlton County, MN
The radar
The Duluth radar (KDLH), 69 km from the middle of the area, began a volume at 06:28 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
Minneapolis, MN (KMPX), launched 00:00Z, 6.4 hours before the alert went out and 199 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
- 1879 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1223 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 278 m²/s²
- 0-3 km storm-relative helicity
- 414 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 15.2
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 Sep 22, 12:25 AM CDT, 1 hour earlier.
Area forecast discussion, Sep 22, 12:25 AM CDT, 1 hour before
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Hazardous Weather Outlook National Weather Service Duluth MN 941 PM CDT Thu Sep 21 2017 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-221030- 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-Douglas-Bayfield-Ashland-Iron-Burnett-Washburn-Sawyer-Price- 941 PM CDT Thu Sep 21 2017 This Hazardous Weather Outlook is for portions of northeast Minnesota and northwest Wisconsin. .DAY ONE...Tonight Scattered thunderstorms are expected tonight over the Northland. Some storms may become strong to severe with large hail, gusty winds, and heavy downpours as the main threats. .DAYS TWO THROUGH SEVEN...Friday through Wednesday There will be several opportunities for thunderstorms and heavy rainfall Friday night through early next week. Strong to severe thunderstorms are possible Friday night, with a greater threat across northeast Minnesota than compared to northwest Wisconsin. .SPOTTER INFORMATION STATEMENT... Skywarn Spotters may be needed tonight. Reports of hail of any size, wind damage, and rainfall amounts will be appreciated. LSZ121-140>148-221030- 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- 941 PM CDT Thu Sep 21 2017 This Hazardous Weather Outlook is for portions of the Nearshore waters of western Lake Superior. .DAY ONE...Tonight A Small Craft Advisory will remain in effect for much of western Lake Superior until late tonight because of strong northeast flow and resulting waves. The winds and waves will subside overnight. Please see the latest Marine Weather Message for more information. Thunderstorms are possible tonight, some may be strong to severe with large hail and lightning the main threats. .DAYS TWO THROUGH SEVEN...Friday through Wednesday There are multiple opportunities for thunderstorms across western Lake Superior Thursday night through early next week. DAP 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, Sep 22, 12:28 AM CDT, 57 minutes before
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</html>The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 11:02 PM CDT | Special Weather Statement | DLH | Lake | 28 min |
| Sep 21, 11:38 PM CDT | Special Weather Statement | DLH | Lake | 37 min |
| Sep 22, 12:17 AM CDT | Special Weather Statement | DLH | 28 min | |
| Sep 22, 12:28 AM CDT | Special Weather Statement | DLH | Cook | 32 min |
| Sep 22, 12:33 AM CDT | Special Weather Statement | DLH | Kanabec | 27 min |
| Sep 22, 12:35 AM CDT | Special Weather Statement | DLH | Crow Wing | 25 min |
| Sep 22, 1:01 AM CDT | Special Weather Statement | DLH | 29 min | |
| Sep 22, 1:02 AM CDT | Special Weather Statement | DLH | Aitkin | 28 min |
| Sep 22, 1:11 AM CDT | Special Weather Statement | DLH | Pine | 34 min |
| Sep 22, 1:31 AM CDT | Special Weather Statement | DLH | Crow Wing | 29 min |
| Sep 22, 1:33 AM CDT | Special Weather Statement | DLH | 27 min | |
| Sep 22, 1:52 AM CDT | Special Weather Statement | DLH | Carlton | 38 min |
| Sep 22, 2:04 AM CDT | Special Weather Statement | DLH | Aitkin | 26 min |
| Sep 22, 2:07 AM CDT | Special Weather Statement | DLH | Aitkin | 23 min |
| Sep 22, 2:31 AM CDT | Special Weather Statement | DLH | Aitkin | 29 min |
| Sep 22, 2:32 AM CDT | Special Weather Statement | DLH | Aitkin | 28 min |
| Sep 22, 2:45 AM CDT | Special Weather Statement | DLH | Itasca | 30 min |
| Sep 22, 3:02 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Itasca | 16 min |
| Sep 22, 3:05 AM CDT | Special Weather Statement | DLH | Aitkin | 25 min |
| Sep 22, 3:17 AM CDT | Severe Thunderstorm Warning | DLH | Itasca | 28 min |
| Sep 22, 3:20 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Itasca | 25 min |
| Sep 22, 3:40 AM CDT | Special Weather Statement | DLH | Carlton | 35 min |
| Sep 22, 3:44 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Itasca, Saint Louis | 17 min |
| Sep 22, 4:12 AM CDT | Special Weather Statement | DLH | Crow Wing | 33 min |
| Sep 22, 4:22 AM CDT | Special Weather Statement | DLH | Saint Louis | 23 min |
| Sep 22, 4:25 AM CDT | Severe Thunderstorm Warning | DLH | Cass | 35 min |
| Sep 22, 4:32 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 28 min |
| Sep 22, 4:48 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Crow Wing | 42 min |
| Sep 22, 5:25 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Crow Wing, Itasca | 50 min |
| Sep 22, 5:26 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton, Crow Wing, Pine, Saint Louis | 49 min |
| Sep 22, 5:29 AM CDT | Severe Thunderstorm Warning | DLH | Crow Wing | 13 min |
| Sep 22, 5:33 AM CDT | Special Weather Statement | DLH | Pine | 12 min |
| Sep 22, 5:44 AM CDT | Severe Thunderstorm Warning | DLH | Pine | 31 min |
| Sep 22, 6:02 AM CDT | Special Weather Statement | DLH | Aitkin | 28 min |
| Sep 22, 6:19 AM CDT | Severe Thunderstorm Warning | DLH | Pine | 41 min |
| Sep 22, 6:22 AM CDT | Severe Thunderstorm Warning | DLH | Carlton, Pine | 23 min |
| Sep 22, 6:24 AM CDT | Special Weather Statement | DLH | Aitkin | 21 min |
| Sep 22, 6:29 AM CDT | Special Weather Statement | DLH | Itasca | 31 min |
| Sep 22, 6:41 AM CDT | Severe Thunderstorm Warning | DLH | Carlton, Saint Louis | 34 min |
| Sep 22, 6:42 AM CDT | Special Marine Warning | DLH | 63 min | |
| Sep 22, 6:57 AM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 33 min |
| Sep 22, 7:14 AM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 31 min |
| Sep 22, 7:28 AM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 17 min |
| Sep 22, 7:41 AM CDT | Special Marine Warning | DLH | 64 min | |
| Sep 22, 7:41 AM CDT | Severe Thunderstorm Warning | DLH | Cook, Lake, Saint Louis | 34 min |
| Sep 22, 7:54 AM CDT | Special Weather Statement | DLH | Pine | 21 min |
| Sep 22, 8:13 AM CDT | Special Weather Statement | DLH | Carlton | 17 min |
| Sep 22, 8:15 AM CDT | Special Weather Statement | DLH | Lake | 30 min |
| Sep 22, 8:20 AM CDT | Special Weather Statement | DLH | Pine | 10 min |
| Sep 22, 8:23 AM CDT | Severe Thunderstorm Warning | DLH | Carlton | 37 min |
| Sep 22, 8:42 AM CDT | Special Weather Statement | DLH | Cook | 33 min |
| Sep 22, 8:46 AM CDT | Special Marine Warning | DLH | 29 min | |
| Sep 22, 8:49 AM CDT | Special Weather Statement | DLH | Carlton | 26 min |
| Sep 22, 8:56 AM CDT | Special Weather Statement | DLH | Pine | 34 min |
| Sep 22, 9:14 AM CDT | Special Weather Statement | DLH | Pine | 31 min |
| Sep 22, 9:16 AM CDT | Special Weather Statement | DLH | Cook | 14 min |
| Sep 22, 9:37 AM CDT | Special Marine Warning | DLH | 23 min | |
| Sep 22, 9:38 AM CDT | Special Weather Statement | DLH | Lake | 37 min |
| Sep 22, 9:55 AM CDT | Special Marine Warning | DLH | 65 min | |
| Sep 22, 10:02 AM CDT | Beach Hazards Statement | DLH | Carlton, Saint Louis | 10 hr |
| Sep 22, 6:04 AM CDT | Special Weather Statement | DLH | Burnett | 26 min |
| Sep 22, 7:05 AM CDT | Severe Thunderstorm Warning | DLH | Sawyer, Washburn | 25 min |
| Sep 22, 7:25 AM CDT | Severe Thunderstorm Warning | DLH | Sawyer, Washburn | 50 min |
| Sep 22, 7:29 AM CDT | Special Weather Statement | DLH | Douglas | 16 min |
| Sep 22, 8:26 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Sawyer | 49 min |
| Sep 22, 8:33 AM CDT | Special Weather Statement | DLH | Douglas | 27 min |
| Sep 22, 8:48 AM CDT | Special Weather Statement | DLH | Sawyer | 27 min |
| Sep 22, 8:50 AM CDT | Special Weather Statement | DLH | Douglas | 10 min |
| Sep 22, 8:55 AM CDT | Special Weather Statement | DLH | Washburn | 20 min |
| Sep 22, 9:06 AM CDT | Special Weather Statement | DLH | Douglas | 24 min |
| Sep 22, 9:12 AM CDT | Special Weather Statement | DLH | Douglas | 33 min |
| Sep 22, 9:12 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Sawyer | 48 min |
| Sep 22, 9:19 AM CDT | Special Weather Statement | DLH | Douglas | 11 min |
| Sep 22, 9:22 AM CDT | Special Weather Statement | DLH | Washburn | 8 min |
| Sep 22, 9:28 AM CDT | Special Weather Statement | DLH | Burnett | 32 min |
| Sep 22, 9:30 AM CDT | Special Weather Statement | DLH | Bayfield | 30 min |
| Sep 22, 9:31 AM CDT | Special Weather Statement | DLH | Washburn | 14 min |
| Sep 22, 9:36 AM CDT | Special Weather Statement | DLH | Washburn | 24 min |
| Sep 22, 9:50 AM CDT | Special Weather Statement | DLH | Ashland | 25 min |
| Sep 22, 9:53 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Sawyer, Washburn | 52 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2017Every severe thunderstorm warning 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.