Alert archive / Michigan / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 60, NWS Marquette, MI
NWS Marquette, MI issued this severe thunderstorm warning at Aug 1, 2017, 4:33 PM EDT for Alger County, Michigan. It was in force for 42 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 1, 2017, 4:33 PM EDT (20:33 UTC)
- Expired
- Aug 1, 2017, 5:15 PM EDT
- In force
- 42 min
- Issued by
- NWS Marquette, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Alger County, MI
The radar
The Marquette radar (KMQT), 77 km from the middle of the area, began a volume at 20:36 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.6 hours before the alert went out and 250 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
- 558 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 838 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 19 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 Marquette, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 1, 4:22 PM EDT, 11 minutes earlier.
Area forecast discussion, Aug 1, 4:22 PM EDT, 11 minutes before
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Hazardous Weather Outlook National Weather Service Marquette MI 345 PM EDT Tue Aug 1 2017 MIZ001>007-009>014-084-085-021945- Keweenaw-Ontonagon-Northern Houghton-Baraga-Marquette-Alger-Luce- Gogebic-Iron-Dickinson-Menominee-Delta-Southern Schoolcraft- Southern Houghton-Northern Schoolcraft- 345 PM EDT Tue Aug 1 2017 /245 PM CDT Tue Aug 1 2017/ This Hazardous Weather Outlook is for portions of western Upper Michigan and central Upper Michigan. .DAY ONE...Tonight Thunderstorms are expected through the afternoon and into the overnight hours across the west this evening, and central and east through the evening and overnight hours. A few storms could be strong to severe with quarter size hail, strong winds, and heavy rain. Areas with poor drainage or that see training precipitation may see localized flooding concerns. A moderate swim risk continues for the Lake Michigan beaches of southern Schoolcraft county this evening. .DAYS TWO THROUGH SEVEN...Wednesday through Monday A moderate swim risk is expected for the beaches along the Alger and Marquette County shorelines of Lake Superior Wednesday into Wednesday evening. A moderate to high swim risk is expected for the beaches along the Alger and Marquette County shorelines of Lake Superior Friday. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. LSZ162-240>251-263>267-021945- 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- 345 PM EDT Tue Aug 1 2017 /245 PM CDT Tue Aug 1 2017/ This Hazardous Weather Outlook is for portions of Eastern Lake Superior...Central Lake Superior and Western Lake Superior. .DAY ONE...Tonight Thunderstorms are expected to push east across south central and eastern portions of the lake tonight. .DAYS TWO THROUGH SEVEN...Wednesday through Monday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. LMZ221-248-250-021945- 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- 345 PM EDT Tue Aug 1 2017 This Hazardous Weather Outlook is for portions of Northern Lake Michigan. .DAY ONE...Tonight Ongoing thunderstorms will be capable of producing strong winds and hail this evening. Another round of showers and storms is possible later tonight when a cold front pushes through. .DAYS TWO THROUGH SEVEN...Wednesday through Monday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. Ritzman
In the hours before
Special weather statement, Aug 1, 3:18 PM EDT, 1 hour 15 minutes before
Special Weather Statement
National Weather Service Marquette MI
318 PM EDT TUE AUG 1 2017
MIZ007-085-012015-
Northern Schoolcraft MI-Luce MI-
318 PM EDT TUE AUG 1 2017
...THUNDERSTORMS WITH HEAVY RAIN OVER NORTHEAST SCHOOLCRAFT COUNTY
TO WESTERN LUCE COUNTY...
At 316 PM EDT, Doppler radar was tracking a strong thunderstorm near
McMillan, or 14 miles west of Newberry, moving east at 10 mph.
Additional thunderstorms were located just north of Seney.
Very heavy rain...frequent lightning...half inch hail and winds in
excess of 30 mph will be possible with these storms.
Locations impacted include...
McMillan, Seney, Snyder Lake and Helmer.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may
lead to localized flooding. Do not drive your vehicle through
flooded roadways.
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional
information and possible warnings from the National Weather Service.
&&
LAT...LON 4625 8564 4625 8570 4637 8613 4651 8610
4650 8587 4654 8586 4655 8554
TIME...MOT...LOC 1918Z 285DEG 9KT 4640 8579
JLASpecial weather statement, Aug 1, 3:25 PM EDT, 1 hour 8 minutes before
Special Weather Statement
National Weather Service Marquette MI
325 PM EDT TUE AUG 1 2017
MIZ005-013-012030-
Marquette MI-Delta MI-
325 PM EDT TUE AUG 1 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN DELTA AND
SOUTHEASTERN MARQUETTE COUNTIES UNTIL 430 PM EDT...
At 325 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Rock to 9 miles east of La Branche.
Movement was east at 20 mph.
Half inch hail and winds in excess of 40 mph will be possible with
these storms.
Locations impacted include...
Gladstone, Rapid River, Rock, U.S. 41 between Trenary and Rapid
River, Brampton, Cornell, Maplewood, St. Nicholas, Perkins and
Lathrop.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional
information and possible warnings from the National Weather Service.
&&
LAT...LON 4581 8732 4589 8732 4590 8736 4616 8736
4618 8711 4616 8711 4616 8690 4580 8690
TIME...MOT...LOC 1925Z 259DEG 17KT 4609 8727 4588 8727
JLALocal storm report, Aug 1, 4:01 PM EDT, 32 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 |
|---|---|---|---|---|
| Jul 31, 8:02 PM EDT | Special Weather Statement | MQT | Dickinson | 43 min |
| Jul 31, 8:59 PM EDT | Areal Flood Advisory | MQT | Delta, Menominee | 3 hr |
| Jul 31, 10:15 PM EDT | Special Weather Statement | MQT | Dickinson | 45 min |
| Aug 1, 1:01 PM EDT | Special Weather Statement | MQT | Luce | 59 min |
| Aug 1, 1:05 PM EDT | Special Weather Statement | MQT | Delta | 55 min |
| Aug 1, 1:17 PM EDT | Special Weather Statement | MQT | Keweenaw | 43 min |
| Aug 1, 1:21 PM EDT | Severe Thunderstorm Warning | MQT | Delta | 19 min |
| Aug 1, 1:43 PM EDT | Special Marine Warning | MQT | 32 min | |
| Aug 1, 1:54 PM EDT | Special Weather Statement | MQT | Delta | 66 min |
| Aug 1, 2:10 PM EDT | Special Marine Warning | MQT | 65 min | |
| Aug 1, 2:20 PM EDT | Special Weather Statement | MQT | Luce | 40 min |
| Aug 1, 2:23 PM EDT | Special Weather Statement | MQT | Luce | 52 min |
| Aug 1, 2:34 PM EDT | Special Weather Statement | MQT | Menominee | 86 min |
| Aug 1, 2:43 PM EDT | Areal Flood Advisory | MQT | Delta | 4 hr |
| Aug 1, 3:07 PM EDT | Special Weather Statement | MQT | Baraga | 38 min |
| Aug 1, 3:18 PM EDT | Special Weather Statement | MQT | Luce | 57 min |
| Aug 1, 3:25 PM EDT | Special Weather Statement | MQT | Delta | 65 min |
| Aug 1, 3:29 PM EDT | Severe Thunderstorm Warning | MQT | Menominee | 24 min |
| Aug 1, 3:32 PM EDT | Special Marine Warning | MQT | 58 min | |
| Aug 1, 3:46 PM EDT | Flash Flood Warning | MQT | Luce, Schoolcraft | 3 hr |
| Aug 1, 3:57 PM EDT | Special Marine Warning | MQT | 93 min | |
| Aug 1, 4:03 PM EDT | Special Weather Statement | MQT | Baraga | 42 min |
| Aug 1, 4:14 PM EDT | Special Weather Statement | MQT | Menominee | 31 min |
| Aug 1, 4:24 PM EDT | Special Weather Statement | MQT | Alger | 51 min |
| Aug 1, 4:28 PM EDT | Special Marine Warning | MQT | 47 min | |
| Aug 1, 4:38 PM EDT | Special Weather Statement | MQT | Luce | 52 min |
| Aug 1, 4:49 PM EDT | Special Marine Warning | MQT | 41 min | |
| Aug 1, 5:23 PM EDT | Areal Flood Advisory | MQT | Alger, Schoolcraft | 2 hr |
| Aug 1, 5:43 PM EDT | Special Weather Statement | MQT | Luce | 47 min |
| Aug 1, 5:53 PM EDT | Severe Thunderstorm Warning | MQT | Alger, Luce, Schoolcraft | 26 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 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.