Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 55, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Jul 8, 2020, 11:02 PM CDT for Aitkin County, Minnesota. It was in force for 28 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
- Jul 8, 2020, 11:02 PM CDT (04:02 UTC)
- Expired
- Jul 8, 2020, 11:30 PM CDT
- In force
- 28 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
County Aitkin County, MN
The radar
The Duluth radar (KDLH), 95 km from the middle of the area, began a volume at 04:06 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 8, 4:15 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 4.0 hours before the alert went out and 196 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
- 2332 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 1764 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 131 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jul 8, 10:44 PM CDT, 18 minutes earlier.
Area forecast discussion, Jul 8, 10:44 PM CDT, 18 minutes before
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Hazardous Weather Outlook National Weather Service Duluth MN 942 PM CDT Wed Jul 8 2020 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-100245- 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- 942 PM CDT Wed Jul 8 2020 This Hazardous Weather Outlook is for portions of northeast Minnesota and northwest Wisconsin. .DAY ONE...Tonight Strong to severe thunderstorms will continue to impact much of northeast Minnesota and northwest Wisconsin tonight. Damaging winds to near 60 mph, heavy rain with flash flooding, dangerous lightning and large hail to quarter size are the primary threats. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Chances of thunderstorms will linger into Thursday and a few may be strong to marginally severe over portions of north central Wisconsin. There will be periodic chances for more thunderstorms over the weekend. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report severe weather to the National Weather Service in Duluth. LSZ121-140>148-100245- 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- 942 PM CDT Wed Jul 8 2020 This Hazardous Weather Outlook is for portions of the Nearshore waters of western Lake Superior. .DAY ONE...Tonight Strong to severe thunderstorms will continue to impact much of western Lake Superior tonight. Damaging winds to near 60 mph, heavy rain with flash flooding, dangerous lightning and large hail to quarter size are the primary threats. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Chances of thunderstorms will linger into Thursday and a few may be strong during the afternoon and evening hours. There will be periodic chances for more thunderstorms over the weekend. PA More information may be obtained at the following web address: http://www.weather.gov/duluth (all lower case)
In the hours before
Local storm report, Jul 8, 10:54 PM CDT, 8 minutes before
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</html>Local storm report, Jul 8, 10:56 PM CDT, 6 minutes before
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</html>Local storm report, Jul 8, 10:59 PM CDT, 3 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 |
|---|---|---|---|---|
| Jul 8, 7:01 PM CDT | Special Marine Warning | DLH | 14 min | |
| Jul 8, 7:10 PM CDT | Tornado Warning | DLH | Crow Wing | 35 min |
| Jul 8, 7:12 PM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 25 min |
| Jul 8, 7:12 PM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 49 min |
| Jul 8, 7:23 PM CDT | Tornado Warning | DLH | Crow Wing | 37 min |
| Jul 8, 7:43 PM CDT | Tornado Warning | DLH | Aitkin, Crow Wing | 32 min |
| Jul 8, 7:44 PM CDT | Severe Thunderstorm Warning | DLH | Crow Wing | 46 min |
| Jul 8, 7:52 PM CDT | Special Marine Warning | DLH | 23 min | |
| Jul 8, 7:58 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton | 47 min |
| Jul 8, 8:22 PM CDT | Flash Flood Warning | DLH | Crow Wing | 5 hr |
| Jul 8, 8:35 PM CDT | Special Weather Statement | DLH | Carlton | 25 min |
| Jul 8, 8:49 PM CDT | Special Weather Statement | DLH | Carlton | 11 min |
| Jul 8, 9:03 PM CDT | Special Weather Statement | DLH | Carlton, Pine | 12 min |
| Jul 8, 9:14 PM CDT | Areal Flood Advisory | DLH | Aitkin | 3 hr |
| Jul 8, 9:20 PM CDT | Special Weather Statement | DLH | Aitkin | 25 min |
| Jul 8, 9:24 PM CDT | Special Weather Statement | DLH | Carlton, Pine | 36 min |
| Jul 8, 9:32 PM CDT | Special Weather Statement | DLH | Crow Wing | 28 min |
| Jul 8, 9:38 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 37 min |
| Jul 8, 9:42 PM CDT | Special Marine Warning | DLH | 33 min | |
| Jul 8, 10:02 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 28 min |
| Jul 8, 10:14 PM CDT | Special Marine Warning | DLH | 61 min | |
| Jul 8, 10:26 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Crow Wing | 34 min |
| Jul 8, 10:56 PM CDT | Special Weather Statement | DLH | Cass | 19 min |
| Jul 8, 11:01 PM CDT | Special Weather Statement | DLH | Cook | 14 min |
| Jul 8, 11:01 PM CDT | Severe Thunderstorm Warning | DLH | Cass | 29 min |
| Jul 8, 11:24 PM CDT | Severe Thunderstorm Warning | DLH | Cass | 36 min |
| Jul 8, 11:46 PM CDT | Special Weather Statement | DLH | Carlton | 14 min |
| Jul 8, 11:49 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Itasca | 26 min |
| Jul 9, 12:00 AM CDT | Severe Thunderstorm Warning | DLH | Carlton | 30 min |
| Jul 9, 12:04 AM CDT | Special Weather Statement | DLH | Itasca | 11 min |
| Jul 9, 12:12 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Itasca | 33 min |
| Jul 9, 12:15 AM CDT | Special Weather Statement | DLH | Saint Louis | 15 min |
| Jul 9, 12:24 AM CDT | Severe Thunderstorm Warning | DLH | Itasca, Saint Louis | 37 min |
| Jul 9, 12:31 AM CDT | Severe Thunderstorm Warning | DLH | Cass | 29 min |
| Jul 9, 12:47 AM CDT | Special Weather Statement | DLH | Itasca | 13 min |
| Jul 9, 12:56 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 34 min |
| Jul 9, 1:03 AM CDT | Special Weather Statement | DLH | Itasca | 12 min |
| Jul 9, 1:14 AM CDT | Special Weather Statement | DLH | Saint Louis | 16 min |
| Jul 9, 1:31 AM CDT | Special Weather Statement | DLH | Itasca | 29 min |
| Jul 9, 1:35 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 25 min |
| Jul 9, 1:55 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 20 min |
| Jul 9, 1:57 AM CDT | Special Weather Statement | DLH | 33 min | |
| Jul 9, 2:03 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Itasca | 27 min |
| Jul 9, 2:12 AM CDT | Special Weather Statement | DLH | Crow Wing | 33 min |
| Jul 9, 2:23 AM CDT | Special Weather Statement | DLH | Aitkin | 37 min |
| Jul 9, 2:42 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton, Crow Wing, Saint Louis | 33 min |
| Jul 9, 2:44 AM CDT | Special Weather Statement | DLH | Cass | 31 min |
| Jul 9, 2:46 AM CDT | Special Weather Statement | DLH | Itasca | 29 min |
| Jul 9, 2:53 AM CDT | Special Weather Statement | DLH | Carlton | 37 min |
| Jul 9, 3:16 AM CDT | Severe Thunderstorm Warning | DLH | Carlton, Saint Louis | 29 min |
| Jul 9, 3:18 AM CDT | Special Marine Warning | DLH | 42 min | |
| Jul 9, 3:22 AM CDT | Special Weather Statement | DLH | Pine | 23 min |
| Jul 9, 3:43 AM CDT | Special Weather Statement | DLH | Pine | 32 min |
| Jul 9, 3:59 AM CDT | Special Marine Warning | DLH | 46 min | |
| Jul 9, 4:06 AM CDT | Special Weather Statement | DLH | Koochiching | 24 min |
| Jul 9, 4:15 AM CDT | Special Weather Statement | DLH | Pine | 30 min |
| Jul 9, 4:41 AM CDT | Special Marine Warning | DLH | 47 min | |
| Jul 8, 7:59 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 46 min |
| Jul 8, 8:03 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield, Douglas, Sawyer | 42 min |
| Jul 8, 8:06 PM CDT | Tornado Warning | DLH | Ashland, Bayfield | 24 min |
| Jul 8, 9:15 PM CDT | Flash Flood Warning | DLH | Ashland, Bayfield, Douglas | 5 hr |
| Jul 8, 9:18 PM CDT | Severe Thunderstorm Warning | DLH | Iron | 42 min |
| Jul 8, 9:27 PM CDT | Special Weather Statement | DLH | Iron | 18 min |
| Jul 8, 9:34 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron, Price | 41 min |
| Jul 8, 9:42 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield, Douglas | 33 min |
| Jul 8, 9:52 PM CDT | Special Weather Statement | DLH | Burnett, Washburn | 23 min |
| Jul 8, 10:06 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Douglas, Sawyer, Washburn | 24 min |
| Jul 8, 10:27 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Iron, Price, Sawyer | 63 min |
| Jul 8, 11:32 PM CDT | Special Weather Statement | DLH | Price | 13 min |
| Jul 9, 3:03 AM CDT | Special Weather Statement | DLH | Washburn | 12 min |
| Jul 9, 3:48 AM CDT | Special Weather Statement | DLH | Douglas | 27 min |
| Jul 9, 4:13 AM CDT | Special Weather Statement | DLH | Bayfield, Douglas | 32 min |
| Jul 9, 4:44 AM CDT | Special Weather Statement | DLH | Bayfield | 31 min |
| Jul 9, 4:47 AM CDT | Special Weather Statement | DLH | Burnett | 28 min |
| Jul 9, 5:14 AM CDT | Special Weather Statement | DLH | Burnett, Washburn | 31 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.