Alert archive / Michigan / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 74, NWS Marquette, MI

September 25, 2017Baraga County, Iron County, Marquette County, Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Sep 25, 2017, 4:29 PM EDT for Baraga County, Iron County, Marquette County, Michigan. It was in force for 31 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
Sep 25, 2017, 4:29 PM EDT (20:29 UTC)
Expired
Sep 25, 2017, 5:00 PM EDT
In force
31 min
Issued by
NWS Marquette, MI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Baraga County, MI, Iron County, MI, Marquette County, MI

The radar

The Marquette radar (KMQT), 46 km from the middle of the area, began a volume at 20:29 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

Minneapolis, MN (KMPX), launched 12:00Z, 8.5 hours before the alert went out and 462 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, Minneapolis, MN at 12:00Z on 2017-09-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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, Minneapolis, MN at 12:00Z on 2017-09-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.193958Sfc1 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
499 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 25, 10:49 AM EDTSmall Craft AdvisoryMQT57 hr
Sep 25, 3:33 PM EDTSpecial Weather StatementMQTBaraga27 min
Sep 25, 3:43 PM EDTSpecial Weather StatementMQTBaraga32 min
Sep 25, 4:10 PM EDTSpecial Weather StatementMQTIron35 min
Sep 25, 4:15 PM EDTSpecial Weather StatementMQTMarquette30 min
Sep 25, 4:37 PM EDTSpecial Weather StatementMQTDickinson38 min
Sep 25, 4:56 PM EDTSpecial Weather StatementMQTIron49 min
Sep 25, 5:50 PM EDTSpecial Weather StatementMQTDickinson25 min
Sep 25, 5:54 PM EDTSevere Thunderstorm WarningMQTMarquette36 min
Sep 25, 6:01 PM EDTSpecial Weather StatementMQTGogebic44 min
Sep 25, 6:55 PM EDTSpecial Weather StatementMQTIron35 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.