Alert archive / Michigan / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 65, NWS Marquette, MI

August 26, 2020Baraga County, Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Aug 26, 2020, 2:27 AM EDT for Baraga County, Michigan. It was in force for 18 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 26, 2020, 2:27 AM EDT (06:27 UTC)
Expired
Aug 26, 2020, 2:45 AM EDT
In force
18 min
Issued by
NWS Marquette, MI
Area
Storm-based polygon
Hail
1.5 in
Wind
50.0 mph

County Baraga County, MI

The radar

The Marquette radar (KMQT), 64 km from the middle of the area, began a volume at 06:31 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 00:00Z, 6.5 hours before the alert went out and 248 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.

Skew-T log-pSkew-T log-p diagram, Green Bay/Straub, WI at 00:00Z on 2020-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 00:00Z on 2020-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1794 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
196 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

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 26, 1:28 AM EDT, 59 minutes earlier.

Area forecast discussion, Aug 26, 1:28 AM EDT, 59 minutes before
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Hazardous weather outlook, Aug 25, 4:44 PM EDT, 9 hours 43 minutes before
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In the hours before

Special weather statement, Aug 26, 2:04 AM EDT, 23 minutes before
Special Weather Statement
National Weather Service Marquette MI
204 AM EDT Wed Aug 26 2020

MIZ002-003-084-260630-
Ontonagon MI-Houghton MI-Southern Houghton MI-
204 AM EDT Wed Aug 26 2020

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL HOUGHTON AND EAST
CENTRAL ONTONAGON COUNTIES UNTIL 230 AM EDT...

At 204 AM EDT, Doppler radar was tracking a strong thunderstorm over
Mass City, or 12 miles southeast of Ontonagon, moving east at 30 mph.

Nickle size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Rockland, Mass City, Greenland, Bob Lake and Winona.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm 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 4671 8924 4687 8918 4688 8882 4663 8891
TIME...MOT...LOC 0604Z 282DEG 26KT 4677 8908

JAW

The office that day

Everything else NWS Marquette, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 26, 2:04 AM EDTSpecial Weather StatementMQTOntonagon26 min
Aug 26, 2:11 AM EDTSevere Thunderstorm WarningMQTBaraga, Houghton, Ontonagon19 min
Aug 26, 2:44 AM EDTSevere Thunderstorm WarningMQTBaraga16 min
Aug 26, 2:54 AM EDTSpecial Weather StatementMQTDickinson36 min
Aug 26, 4:06 AM EDTSpecial Weather StatementMQTDickinson24 min
Aug 26, 5:17 AM EDTAreal Flood AdvisoryMQTBaraga, Marquette57 min
Aug 26, 7:13 AM EDTSpecial Marine WarningMQT32 min
Aug 26, 7:24 AM EDTSpecial Marine WarningMQT36 min
Aug 26, 7:29 AM EDTSpecial Weather StatementMQTOntonagon31 min
Aug 26, 8:23 AM EDTSpecial Weather StatementMQTBaraga37 min
Aug 26, 8:44 AM EDTSpecial Marine WarningMQT31 min
Aug 26, 8:47 AM EDTSpecial Weather StatementMQTAlger28 min
Aug 26, 9:01 AM EDTSpecial Marine WarningMQT44 min
Aug 26, 9:04 AM EDTSpecial Marine WarningMQT30 min
Aug 26, 9:08 AM EDTSpecial Weather StatementMQTSchoolcraft52 min
Aug 26, 9:27 AM EDTSevere Thunderstorm WarningMQTSchoolcraft33 min
Aug 26, 9:28 AM EDTSpecial Marine WarningMQT32 min
Aug 26, 9:37 AM EDTSpecial Marine WarningMQT38 min
Aug 26, 10:19 AM EDTSpecial Marine WarningMQT26 min
Aug 26, 4:23 PM EDTSmall Craft AdvisoryMQT24 hr

Nearby

Severe Thunderstorm Warnings in Michigan, 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.