Alert archive / Minnesota / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 39, NWS Duluth, MN

June 18, 2024Koochiching County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jun 18, 2024, 5:09 AM CDT for Koochiching County, Minnesota. It was in force for 52 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
Jun 18, 2024, 5:09 AM CDT (10:09 UTC)
Expired
Jun 18, 2024, 6:01 AM CDT
In force
52 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Koochiching County, MN

The radar

The Duluth radar (KDLH), 196 km from the middle of the area, began a volume at 10:10 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 18, 2:08 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 10.2 hours before the alert went out and 51 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, International Fa, MN at 00:00Z on 2024-06-18Temperature 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, International Fa, MN at 00:00Z on 2024-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 square meters per square second.1939587897Sfc1 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
1368 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
149 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 Jun 18, 4:59 AM CDT, 10 minutes earlier.

Area forecast discussion, Jun 18, 4:59 AM CDT, 10 minutes before
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Hazardous weather outlook, Jun 18, 3:59 AM CDT, 1 hour 10 minutes before
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In the hours before

Special weather statement, Jun 18, 3:40 AM CDT, 1 hour 29 minutes before
Special Weather Statement
National Weather Service Duluth MN
340 AM CDT Tue Jun 18 2024

MNZ019-037-180915-
Central St. Louis MN-Carlton/South St. Louis MN-
340 AM CDT Tue Jun 18 2024

...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL ST. LOUIS AND
NORTHEASTERN CARLTON COUNTIES THROUGH 415 AM CDT...

At 340 AM CDT, Doppler radar was tracking a strong thunderstorm near
Fond Du Lac Band Sawyer Area, or near Cloquet, moving northeast at 45
mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Duluth, Cloquet, Hermantown, Scanlon, Brookston, Saginaw, Fond Du Lac
Band Brookston Area, Island Lake, Fond Du Lac Band Cloquet Area, Pike
Lake Near Duluth, City of Rice Lake, Fond Du Lac Band Sawyer Area,
Grand Lake, Fredenberg, Mahnomen, Culver, Fish Lake, Sawyer, Shaw,
and Duluth Heights.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 900 AM CDT for
northeastern Minnesota.

&&

LAT...LON 4660 9265 4676 9282 4715 9232 4687 9201
TIME...MOT...LOC 0840Z 234DEG 38KT 4675 9263

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Melde
Special weather statement, Jun 18, 3:42 AM CDT, 1 hour 27 minutes before
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Special weather statement, Jun 18, 4:00 AM CDT, 1 hour 9 minutes before
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Special weather statement, Jun 18, 4:25 AM CDT, 44 minutes before
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Special weather statement, Jun 18, 4:29 AM CDT, 40 minutes before
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Special weather statement, Jun 18, 4:52 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
Jun 17, 11:24 PM CDTSpecial Weather StatementDLHCass36 min
Jun 18, 1:33 AM CDTSpecial Weather StatementDLHAitkin, Crow Wing42 min
Jun 18, 2:08 AM CDTSpecial Weather StatementDLHCrow Wing37 min
Jun 18, 2:29 AM CDTSpecial Weather StatementDLHAitkin, Carlton31 min
Jun 18, 2:51 AM CDTAreal Flood AdvisoryDLHAitkin, Carlton, Crow Wing, Saint Louis4 hr
Jun 18, 2:53 AM CDTSpecial Weather StatementDLHCrow Wing37 min
Jun 18, 3:03 AM CDTSpecial Weather StatementDLHAitkin, Carlton42 min
Jun 18, 3:15 AM CDTSpecial Weather StatementDLHAitkin30 min
Jun 18, 3:18 AM CDTSpecial Weather StatementDLHAitkin27 min
Jun 18, 3:23 AM CDTSevere Thunderstorm WarningDLHAitkin, Cass, Crow Wing, Itasca37 min
Jun 18, 3:40 AM CDTSpecial Weather StatementDLHCarlton35 min
Jun 18, 3:42 AM CDTSpecial Weather StatementDLHAitkin33 min
Jun 18, 4:00 AM CDTSpecial Weather StatementDLHAitkin30 min
Jun 18, 4:25 AM CDTSpecial Weather StatementDLHSaint Louis35 min
Jun 18, 4:29 AM CDTSpecial Weather StatementDLHKoochiching31 min
Jun 18, 4:52 AM CDTSpecial Weather StatementDLHKoochiching23 min
Jun 18, 5:02 AM CDTSevere Thunderstorm WarningDLHCass, Crow Wing, Itasca, Koochiching58 min
Jun 18, 5:43 AM CDTSpecial Weather StatementDLHLake32 min
Jun 18, 5:56 AM CDTSpecial Weather StatementDLHCass34 min
Jun 18, 5:58 AM CDTSpecial Weather StatementDLHItasca32 min
Jun 18, 6:03 AM CDTSpecial Weather StatementDLHKoochiching27 min
Jun 18, 6:25 AM CDTSpecial Weather StatementDLHItasca35 min
Jun 18, 6:27 AM CDTSpecial Weather StatementDLHKoochiching33 min
Jun 18, 8:55 AM CDTSpecial Weather StatementDLHItasca35 min
Jun 18, 10:50 AM CDTSpecial Weather StatementDLH25 min
Jun 18, 12:12 PM CDTSpecial Weather StatementDLHItasca33 min
Jun 18, 12:36 PM CDTSevere Thunderstorm WarningDLHItasca, Saint Louis39 min
Jun 18, 1:03 PM CDTAreal Flood AdvisoryDLHCass, Itasca, Saint Louis75 min
Jun 18, 1:11 PM CDTSpecial Weather StatementDLHSaint Louis34 min
Jun 18, 1:28 PM CDTSevere Thunderstorm WarningDLHSaint Louis47 min
Jun 18, 1:57 PM CDTSevere Thunderstorm WarningDLHCass, Itasca48 min
Jun 18, 1:59 PM CDTTornado WarningDLHLake, Saint Louis21 min
Jun 18, 2:13 PM CDTFlash Flood WarningDLHItasca, Saint Louis7 hr
Jun 18, 2:18 PM CDTTornado WarningDLHLake, Saint Louis42 min
Jun 18, 2:46 PM CDTTornado WarningDLHCass, Itasca29 min
Jun 18, 2:48 PM CDTSevere Thunderstorm WarningDLHCass, Itasca42 min
Jun 18, 2:51 PM CDTTornado WarningDLHLake, Saint Louis39 min
Jun 18, 3:05 PM CDTTornado WarningDLHCass, Itasca40 min
Jun 18, 3:09 PM CDTSevere Thunderstorm WarningDLHCass, Itasca, Saint Louis39 min
Jun 18, 3:10 PM CDTTornado WarningDLHCass, Itasca37 min
Jun 18, 3:24 PM CDTFlash Flood Warning Considerable damage threatDLHSaint Louis9 hr
Jun 18, 4:01 PM CDTFlash Flood WarningDLHCass, Crow Wing, Itasca, Koochiching, Saint Louis5 hr
Jun 18, 4:53 PM CDTSpecial Marine WarningDLH67 min
Jun 18, 4:58 PM CDTFlash Flood WarningDLHLake, Saint Louis4 hr
Jun 18, 5:05 PM CDTSevere Thunderstorm WarningDLHCass, Crow Wing26 min
Jun 18, 5:07 PM CDTTornado WarningDLHSaint Louis23 min
Jun 18, 5:34 PM CDTTornado Warning Tornado observedDLHSaint Louis24 min
Jun 18, 5:41 PM CDTSpecial Marine WarningDLH64 min
Jun 18, 6:19 PM CDTFlash Flood WarningDLHCook, Lake, Saint Louis6 hr
Jun 18, 6:53 PM CDTMarine Dense Fog AdvisoryDLH12 hr
Jun 18, 6:55 PM CDTAreal Flood AdvisoryDLHAitkin, Carlton, Crow Wing, Itasca, Saint Louis3 hr
Jun 18, 6:56 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2024Every severe thunderstorm warning in 2024

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.