Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 19, NWS Duluth, MN

July 5, 2020Bayfield County, Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at Jul 5, 2020, 1:57 PM CDT for Bayfield County, Wisconsin. It was in force for 33 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 5, 2020, 1:57 PM CDT (18:57 UTC)
Expired
Jul 5, 2020, 2:30 PM CDT
In force
33 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
1.25 in
Wind
50.0 mph

County Bayfield County, WI

The radar

The Duluth radar (KDLH), 82 km from the middle of the area, began a volume at 18:58 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, 7.0 hours before the alert went out and 273 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 2020-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 492 joules per kilogram.LCLLFCEL10008507005003002001001 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 2020-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 square meters per square second.1939Sfc1 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
492 J/kg
Mixed-layer CIN
-93 J/kg
Mixed-layer LCL
1517 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Duluth, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 5, 1:48 PM CDT, 9 minutes earlier.

Area forecast discussion, Jul 5, 1:48 PM CDT, 9 minutes before
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Hazardous weather outlook, Jul 5, 5:25 AM CDT, 8 hours 32 minutes before
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In the hours before

Special weather statement, Jul 5, 12:15 PM CDT, 1 hour 42 minutes before
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Special weather statement, Jul 5, 1:20 PM CDT, 37 minutes before
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<body>
  <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Jul 5, 1:31 PM CDT, 26 minutes before
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<body>
  <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        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 Duluth, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 4, 7:05 PM CDTSpecial Weather StatementDLHSaint Louis10 min
Jul 4, 7:58 PM CDTSpecial Weather StatementDLH17 min
Jul 4, 10:13 PM CDTSpecial Weather StatementDLHKoochiching17 min
Jul 4, 10:28 PM CDTSpecial Weather StatementDLH17 min
Jul 4, 10:45 PM CDTSpecial Weather StatementDLH15 min
Jul 5, 1:35 AM CDTSpecial Weather StatementDLH10 min
Jul 5, 12:15 PM CDTSpecial Weather StatementDLHLake15 min
Jul 5, 12:38 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis37 min
Jul 5, 1:09 PM CDTSevere Thunderstorm WarningDLHLake51 min
Jul 5, 2:35 PM CDTSpecial Weather StatementDLHLake of the Woods10 min
Jul 5, 2:52 PM CDTSpecial Weather StatementDLH8 min
Jul 5, 3:13 PM CDTSpecial Weather StatementDLHKoochiching17 min
Jul 5, 3:30 PM CDTSevere Thunderstorm WarningDLHKoochiching30 min
Jul 5, 3:59 PM CDTAreal Flood AdvisoryDLHSaint Louis3 hr
Jul 5, 4:03 PM CDTSevere Thunderstorm WarningDLHSaint Louis27 min
Jul 5, 4:10 PM CDTSpecial Marine WarningDLH65 min
Jul 5, 4:31 PM CDTSevere Thunderstorm WarningDLHSaint Louis23 min
Jul 5, 5:08 PM CDTSevere Thunderstorm WarningDLHSaint Louis52 min
Jul 5, 5:27 PM CDTSevere Thunderstorm WarningDLHKoochiching, Saint Louis26 min
Jul 5, 6:14 PM CDTSevere Thunderstorm WarningDLHSaint Louis46 min
Jul 5, 6:31 PM CDTSevere Thunderstorm WarningDLHSaint Louis29 min
Jul 5, 1:20 PM CDTSpecial Weather StatementDLHDouglas10 min
Jul 5, 1:31 PM CDTSpecial Weather StatementDLHBayfield14 min
Jul 5, 2:05 PM CDTSpecial Weather StatementDLHDouglas10 min
Jul 5, 3:18 PM CDTSpecial Weather StatementDLHDouglas12 min
Jul 5, 4:35 PM CDTSevere Thunderstorm WarningDLHBayfield40 min
Jul 5, 5:02 PM CDTFlash Flood WarningDLHBayfield113 min
Jul 5, 5:06 PM CDTSevere Thunderstorm WarningDLHBayfield, Douglas39 min
Jul 5, 5:37 PM CDTSevere Thunderstorm WarningDLHBurnett, Douglas24 min
Jul 5, 5:40 PM CDTSevere Thunderstorm WarningDLHAshland, Bayfield, Sawyer25 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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.