Alert archive / Minnesota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 45, NWS Duluth, MN

July 18, 2013Lake County, Saint Louis County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 18, 2013, 9:54 AM CDT for Lake County, Saint Louis County, Minnesota. It was in force for 21 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, 9:54 AM CDT (14:54 UTC)
Expired
Jul 18, 2013, 10:15 AM CDT
In force
21 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Lake County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 83 km from the middle of the area, began a volume at 14:56 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, 2.9 hours before the alert went out and 452 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 Duluth, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 18, 6:42 AM CDT, 3 hours 12 minutes earlier.

Area forecast discussion, Jul 18, 6:42 AM CDT, 3 hours 12 minutes before
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Hazardous weather outlook, Jul 18, 5:13 AM CDT, 4 hours 41 minutes before
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In the hours before

Special weather statement, Jul 18, 6:29 AM CDT, 3 hours 25 minutes before
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Local storm report, Jul 18, 7:15 AM CDT, 2 hours 39 minutes before
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Local storm report, Jul 18, 7:32 AM CDT, 2 hours 22 minutes before
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Special weather statement, Jul 18, 8:50 AM CDT, 1 hour 4 minutes before
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Special weather statement, Jul 18, 9:19 AM CDT, 35 minutes before
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Special weather statement, Jul 18, 9:37 AM CDT, 17 minutes before
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The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 17, 7:15 PM CDTSpecial Weather StatementDLHLake30 min
Jul 17, 8:36 PM CDTSpecial Weather StatementDLHItasca39 min
Jul 17, 8:46 PM CDTSpecial Weather StatementDLHLake29 min
Jul 18, 12:33 AM CDTSpecial Weather StatementDLHCook27 min
Jul 18, 7:11 AM CDTAreal Flood AdvisoryDLHKoochiching, Saint Louis4 hr
Jul 18, 8:50 AM CDTSpecial Weather StatementDLH25 min
Jul 18, 9:19 AM CDTSpecial Weather StatementDLH16 min
Jul 18, 9:37 AM CDTSpecial Weather StatementDLH18 min
Jul 18, 10:47 AM CDTSpecial Weather StatementDLH18 min
Jul 18, 11:10 AM CDTSpecial Weather StatementDLHCook20 min
Jul 18, 12:50 PM CDTSpecial Weather StatementDLH25 min
Jul 18, 1:04 PM CDTSpecial Weather StatementDLH26 min
Jul 18, 1:09 PM CDTSpecial Weather StatementDLHLake21 min
Jul 18, 1:21 PM CDTSpecial Weather StatementDLHLake24 min
Jul 18, 1:26 PM CDTSevere Thunderstorm WarningDLHLake49 min
Jul 18, 1:55 PM CDTSpecial Weather StatementDLHCook20 min
Jul 18, 2:00 PM CDTSpecial Weather StatementDLHLake15 min
Jul 18, 2:07 PM CDTSpecial Marine WarningDLH53 min
Jul 18, 2:28 PM CDTSpecial Weather StatementDLHCook22 min
Jul 18, 2:36 PM CDTSevere Thunderstorm WarningDLHCook, Lake24 min
Jul 18, 2:54 PM CDTSpecial Marine WarningDLH51 min
Jul 18, 3:06 PM CDTSpecial Weather StatementDLHLake24 min
Jul 18, 3:45 PM CDTSpecial Marine WarningDLH30 min
Jul 18, 4:26 PM CDTSpecial Weather StatementDLHLake4 min
Jul 18, 4:41 PM CDTSpecial Weather StatementDLHKoochiching19 min
Jul 18, 4:52 PM CDTSevere Thunderstorm WarningDLHKoochiching, Saint Louis23 min
Jul 18, 4:57 PM CDTSpecial Weather StatementDLHKoochiching18 min
Jul 18, 4:59 PM CDTSpecial Weather StatementDLH16 min
Jul 18, 5:06 PM CDTSpecial Weather StatementDLHKoochiching24 min
Jul 18, 5:11 PM CDTSpecial Marine WarningDLH49 min
Jul 18, 5:14 PM CDTSevere Thunderstorm WarningDLHKoochiching, Saint Louis46 min
Jul 18, 5:22 PM CDTSpecial Weather StatementDLH8 min
Jul 18, 5:34 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis41 min
Jul 18, 5:52 PM CDTSpecial Weather StatementDLHCook23 min
Jul 18, 5:59 PM CDTSevere Thunderstorm WarningDLHKoochiching, Saint Louis46 min
Jul 18, 6:07 PM CDTSpecial Weather StatementDLH23 min
Jul 18, 6:14 PM CDTSpecial Weather StatementDLHKoochiching16 min
Jul 18, 6:24 PM CDTSevere Thunderstorm WarningDLHCook, Lake51 min
Jul 18, 6:44 PM CDTSpecial Weather StatementDLHSaint Louis16 min
Jul 18, 6:49 PM CDTSpecial Weather StatementDLHCook26 min
Jul 18, 6:58 PM CDTSpecial Weather StatementDLHSaint Louis17 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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.