Alert archive / Michigan / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 11, NWS Marquette, MI

July 18, 2013Keweenaw County, Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Jul 18, 2013, 3:17 PM EDT for Keweenaw County, Michigan. It was in force for 43 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 18, 2013, 3:17 PM EDT (19:17 UTC)
Expired
Jul 18, 2013, 4:00 PM EDT
In force
43 min
Issued by
NWS Marquette, MI
Area
Storm-based polygon
Hail
1.25 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 19:18 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, 7.3 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.

Skew-T log-pSkew-T log-p diagram, Green Bay/Straub, WI at 12:00Z on 2013-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 802 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 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 12:00Z on 2013-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 square meters per square second.1939Sfc1 km3 km6 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
802 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
1214 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.4

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 Jul 18, 2:09 PM EDT, 1 hour 8 minutes earlier.

Area forecast discussion, Jul 18, 2:09 PM EDT, 1 hour 8 minutes before
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Hazardous weather outlook, Jul 18, 5:22 AM EDT, 9 hours 55 minutes before
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In the hours before

Special weather statement, Jul 18, 1:06 PM EDT, 2 hours 11 minutes before
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Special weather statement, Jul 18, 3:04 PM EDT, 13 minutes before
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  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 3:09 PM EDTSpecial Marine WarningMQT66 min
Jul 18, 3:27 PM EDTSpecial Marine WarningMQT63 min
Jul 18, 4:09 PM EDTSpecial Marine WarningMQT96 min
Jul 18, 4:39 PM EDTSpecial Marine WarningMQT81 min
Jul 18, 4:42 PM EDTSpecial Marine WarningMQT48 min
Jul 18, 4:54 PM EDTMarine Dense Fog AdvisoryMQT19 hr
Jul 18, 4:54 PM EDTSmall Craft AdvisoryMQT23 hr
Jul 18, 5:15 PM EDTSpecial Marine WarningMQT90 min
Jul 18, 5:32 PM EDTSevere Thunderstorm WarningMQTHoughton, Keweenaw43 min
Jul 18, 5:34 PM EDTSpecial Marine WarningMQT26 min
Jul 18, 5:44 PM EDTSpecial Marine WarningMQT61 min
Jul 18, 5:46 PM EDTSpecial Marine WarningMQT89 min
Jul 18, 6:07 PM EDTSpecial Marine WarningMQT38 min
Jul 18, 6:43 PM EDTSpecial Marine WarningMQT62 min
Jul 18, 7:01 PM EDTSevere Thunderstorm WarningMQTBaraga, Marquette44 min
Jul 18, 7:03 PM EDTSpecial Marine WarningMQT42 min
Jul 18, 7:14 PM EDTSevere Thunderstorm WarningMQTSchoolcraft31 min
Jul 18, 7:16 PM EDTSpecial Marine WarningMQT44 min
Jul 18, 7:33 PM EDTSevere Thunderstorm WarningMQTAlger, Luce, Schoolcraft42 min
Jul 18, 7:45 PM EDTSpecial Marine WarningMQT90 min
Jul 18, 7:45 PM EDTSevere Thunderstorm WarningMQTAlger, Marquette45 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2013Every severe thunderstorm warning in 2013

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.