Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 110, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Jul 8, 2018, 9:42 AM CDT for Cook County, Lake County, Saint Louis County, Minnesota. It was in force for 25 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, 2018, 9:42 AM CDT (14:42 UTC)
- Expired
- Jul 8, 2018, 10:07 AM CDT
- In force
- 25 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Cook County, MN, Lake County, MN, Saint Louis County, MN
The radar
The Duluth radar (KDLH), 106 km from the middle of the area, began a volume at 14:42 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, 6:59 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 12:00Z, 2.7 hours before the alert went out and 171 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
- 2692 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 748 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 225 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 7.0
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, 7:19 AM CDT, 2 hours 23 minutes earlier.
Area forecast discussion, Jul 8, 7:19 AM CDT, 2 hours 23 minutes before
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</html>Hazardous weather outlook, Jul 8, 3:38 AM CDT, 6 hours 4 minutes before
Hazardous Weather Outlook National Weather Service Duluth MN 338 AM CDT Sun Jul 8 2018 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-091030- 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- 338 AM CDT Sun Jul 8 2018 This Hazardous Weather Outlook is for portions of northeast Minnesota and northwest Wisconsin. .DAY ONE...Today and Tonight Strong to severe thunderstorms may produce large hail and damaging winds across northern Minnesota this afternoon. These storms will produce very heavy rainfall which could lead to flash flooding. .DAYS TWO THROUGH SEVEN...Monday through Saturday Thunderstorms will be possible over portions of the area Wednesday into Thursday, western areas Wednesday, all areas Wednesday night, and eastern areas Thursday. Some of these storms could be strong. Another chance for thunderstorms will be possible Friday night into Saturday night. .SPOTTER INFORMATION STATEMENT... SKYWARN spotters are encouraged to report hail of any size, damaging winds, and rainfall amounts to the National Weather Service. LSZ121-140>148-091030- 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- 338 AM CDT Sun Jul 8 2018 This Hazardous Weather Outlook is for portions of the Nearshore waters of western Lake Superior. .DAY ONE...Today and Tonight A Small Craft Advisory remains in effect through this evening along much of the North Shore. See the latest Nearshore Marine Forecast and Marine Weather Message for more details. Thunderstorms will be possible along portions of the North Shore this morning and all areas this afternoon into tonight. Some of the storms could be strong to severe with hail, strong winds, and frequent lightning the main threats. .DAYS TWO THROUGH SEVEN...Monday through Saturday Thunderstorms will be possible over the area Wednesday into Thursday and again Saturday. Melde/Wolfe 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, Jul 8, 5:43 AM CDT, 3 hours 59 minutes before
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</html>Special weather statement, Jul 8, 8:16 AM CDT, 1 hour 26 minutes before
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</html>Local storm report, Jul 8, 8:39 AM CDT, 1 hour 3 minutes before
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</html>Local storm report, Jul 8, 8:48 AM CDT, 54 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, 5:43 AM CDT | Special Weather Statement | DLH | Koochiching | 32 min |
| Jul 8, 6:06 AM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 39 min |
| Jul 8, 6:45 AM CDT | Severe Thunderstorm Warning | DLH | Koochiching, Saint Louis | 45 min |
| Jul 8, 7:35 AM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 40 min |
| Jul 8, 8:16 AM CDT | Special Weather Statement | DLH | 14 min | |
| Jul 8, 8:20 AM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching, Saint Louis | 40 min |
| Jul 8, 8:40 AM CDT | Special Weather Statement | DLH | Lake | 35 min |
| Jul 8, 8:56 AM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching, Lake, Saint Louis | 49 min |
| Jul 8, 8:58 AM CDT | Severe Thunderstorm Warning | DLH | Cook, Lake | 47 min |
| Jul 8, 9:09 AM CDT | Severe Thunderstorm Warning | DLH | Cook | 36 min |
| Jul 8, 9:31 AM CDT | Special Marine Warning | DLH | 59 min | |
| Jul 8, 10:09 AM CDT | Special Weather Statement | DLH | 36 min | |
| Jul 8, 10:33 AM CDT | Areal Flood Warning | DLH | Koochiching, Saint Louis | 3 hr |
| Jul 8, 10:40 AM CDT | Special Weather Statement | DLH | Cook | 35 min |
| Jul 8, 1:18 PM CDT | Special Weather Statement | DLH | Cook | 42 min |
| Jul 8, 3:36 PM CDT | Special Weather Statement | DLH | Itasca | 24 min |
| Jul 8, 4:36 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 24 min |
| Jul 8, 4:47 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 43 min |
| Jul 8, 5:19 PM CDT | Special Marine Warning | DLH | 26 min | |
| Jul 8, 5:25 PM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 35 min |
| Jul 8, 5:27 PM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 33 min |
| Jul 8, 5:38 PM CDT | Special Marine Warning | DLH | 37 min | |
| Jul 8, 5:47 PM CDT | Special Weather Statement | DLH | Cass | 13 min |
| Jul 8, 6:12 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Itasca | 48 min |
| Jul 8, 6:16 PM CDT | Special Marine Warning | DLH | 44 min | |
| Jul 8, 6:45 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Itasca | 45 min |
| Jul 8, 6:59 PM CDT | Special Marine Warning | DLH | 91 min | |
| Jul 8, 6:15 PM CDT | Special Weather Statement | DLH | Bayfield | 30 min |
| Jul 8, 6:46 PM CDT | Special Weather Statement | DLH | Bayfield | 29 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2018Every severe thunderstorm warning in 2018
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.