Alert archive / Michigan / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 59, NWS Marquette, MI
NWS Marquette, MI issued this severe thunderstorm warning at Aug 27, 2018, 8:54 PM EDT for Keweenaw County, Michigan. It was in force for 51 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 27, 2018, 8:54 PM EDT (00:54 UTC)
- Expired
- Aug 27, 2018, 9:45 PM EDT
- In force
- 51 min
- Issued by
- NWS Marquette, MI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Keweenaw County, MI
The radar
The Marquette radar (KMQT), 98 km from the middle of the area, began a volume at 00:57 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 |
|---|---|---|---|
| Aug 27, 7:01 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.9 hours before the alert went out and 312 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
- 1227 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 1085 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 370 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 13.5
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 Marquette, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 27, 7:36 PM EDT, 1 hour 18 minutes earlier.
Area forecast discussion, Aug 27, 7:36 PM EDT, 1 hour 18 minutes before
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</html>Hazardous weather outlook, Aug 27, 3:50 PM EDT, 5 hours 4 minutes before
Hazardous Weather Outlook National Weather Service Marquette MI 350 PM EDT Mon Aug 27 2018 MIZ001>007-009>014-084-085-282000- Keweenaw-Ontonagon-Northern Houghton-Baraga-Marquette-Alger-Luce- Gogebic-Iron-Dickinson-Menominee-Delta-Southern Schoolcraft- Southern Houghton-Northern Schoolcraft- 350 PM EDT Mon Aug 27 2018 /250 PM CDT Mon Aug 27 2018/ This Hazardous Weather Outlook is for portions of western Upper Michigan and central Upper Michigan. .DAY ONE...Tonight Severe thunderstorms are possible this evening into tonight with hail and damaging wind being the main threats. Heavy rain is likely with stronger storms tonight, which may lead to flash flooding where more persistent thunderstorms occur. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms are possible through Tuesday night, mainly in the evening and early overnight south central and east. A high swim risk is expected on Tuesday for the Lake Michigan beaches of Schoolcraft County. Thunderstorms return to the forecast Friday afternoon into Saturday. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. LSZ162-240>251-263>267-282000- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM-Saxon Harbor WI to Black River MI- Black River to Ontonagon MI- Ontonagon to Upper Entrance of Portage Canal MI- Upper Entrance of Portage Canal to Eagle River MI- Eagle River to Manitou Island MI- Manitou Island to Point Isabelle MI- Point Isabelle to Lower Entrance of Portage Canal MI- Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays-Huron Islands to Marquette MI- Marquette to Munising MI-Munising to Grand Marais MI- Grand Marais to Whitefish Point MI- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 350 PM EDT Mon Aug 27 2018 /250 PM CDT Mon Aug 27 2018/ This Hazardous Weather Outlook is for portions of Eastern Lake Superior...Central Lake Superior and Western Lake Superior. .DAY ONE...Tonight Thunderstorms are this evening into tonight. Some storms may be severe and could contain high winds and large hail. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms are possible into Tuesday night. Thunderstorms return to the forecast Friday afternoon into Saturday. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. LMZ221-248-250-282000- Green Bay North of line from Cedar River MI to Rock Island Passage-Seul Choix Point to Point Detour MI- 5NM East of a line from Fairport MI to Rock Island Passage- 350 PM EDT Mon Aug 27 2018 This Hazardous Weather Outlook is for portions of Northern Lake Michigan. .DAY ONE...Tonight Thunderstorms are expected late this evening into tonight. Some storms may be strong to severe and could contain large hail and damaging winds. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms are possible through Tuesday night. Thunderstorms return to the forecast Saturday. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. Titus
In the hours before
Local storm report, Aug 27, 7:15 PM EDT, 1 hour 39 minutes before
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</html>Local storm report, Aug 27, 8:31 PM EDT, 23 minutes before
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</html>Local storm report, Aug 27, 8:37 PM EDT, 17 minutes before
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</html>Local storm report, Aug 27, 8:45 PM EDT, 9 minutes before
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</html>Local storm report, Aug 27, 8:46 PM EDT, 8 minutes before
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</html>Local storm report, Aug 27, 8:48 PM EDT, 6 minutes before
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</html>The office that day
Everything else NWS Marquette, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 8:16 PM EDT | Special Marine Warning | MQT | 89 min | |
| Aug 27, 8:44 PM EDT | Severe Thunderstorm Warning | MQT | Baraga, Marquette | 31 min |
| Aug 27, 9:07 PM EDT | Special Marine Warning | MQT | 83 min | |
| Aug 27, 9:14 PM EDT | Special Weather Statement | MQT | Gogebic | 61 min |
| Aug 27, 9:39 PM EDT | Special Marine Warning | MQT | 81 min | |
| Aug 27, 10:10 PM EDT | Special Marine Warning | MQT | 95 min | |
| Aug 27, 10:35 PM EDT | Special Weather Statement | MQT | Baraga, Marquette | 40 min |
| Aug 27, 11:17 PM EDT | Special Weather Statement | MQT | Alger, Schoolcraft | 43 min |
| Aug 27, 11:36 PM EDT | Special Marine Warning | MQT | 54 min | |
| Aug 27, 11:45 PM EDT | Special Marine Warning | MQT | 60 min | |
| Aug 27, 11:58 PM EDT | Special Weather Statement | MQT | Schoolcraft | 47 min |
| Aug 28, 12:28 AM EDT | Special Marine Warning | MQT | 32 min | |
| Aug 28, 12:32 AM EDT | Special Weather Statement | MQT | Luce | 43 min |
| Aug 28, 1:24 AM EDT | Special Weather Statement | MQT | Luce | 36 min |
| Aug 28, 3:59 AM EDT | Beach Hazards Statement | MQT | Alger, Marquette, Schoolcraft | 18 hr |
| Aug 28, 4:46 PM EDT | Small Craft Advisory | MQT | 30 hr |
Nearby
Severe Thunderstorm Warnings in Michigan, 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.