Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 61, NWS Duluth, MN

June 28, 2018Aitkin County, Cass County, Itasca County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jun 28, 2018, 1:25 PM CDT for Aitkin County, Cass County, Itasca County, Minnesota. It was in force for 50 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 28, 2018, 1:25 PM CDT (18:25 UTC)
Expired: Jun 28, 2018, 2:15 PM CDT
In force: 50 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.25 in
Wind: 60.0 mph

Counties Aitkin County, MN, Cass County, MN, Itasca County, MN

The radar

The Duluth radar (KDLH), 122 km from the middle of the area, began a volume at 18:28 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

International Fa, MN (KINL), launched 12:00Z, 6.4 hours before the alert went out and 176 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2670 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 204 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 28, 11:33 AM CDT, 1 hour 52 minutes earlier.

Area forecast discussion, Jun 28, 11:33 AM CDT, 1 hour 52 minutes before

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Hazardous weather outlook, Jun 28, 9:06 AM CDT, 4 hours 19 minutes before

Hazardous Weather Outlook
National Weather Service Duluth MN
906 AM CDT Thu Jun 28 2018

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-291415-
Koochiching-North St. Louis-Northern Cook/Northern Lake-
North Itasca-Central St. Louis-Southern Lake/North Shore-
Southern Cook/North Shore-North Cass-South Itasca-South Cass-
Crow Wing-Northern Aitkin-South Aitkin-Carlton/South St. Louis-
Pine-Douglas-Bayfield-Ashland-Iron-Burnett-Washburn-Sawyer-Price-
906 AM CDT Thu Jun 28 2018

This Hazardous Weather Outlook is for portions of northeast
Minnesota and northwest Wisconsin.

.DAY ONE...Today and Tonight

There is a slight chance of scattered thunderstorms this
afternoon from Brainerd and Walker east to the I-35 corridor and
the Twin Ports. Should storms develop, a few may be strong to
severe with large hail, torrential rain, and damaging winds the
main threats. A tornado or two cannot be completely ruled out.
Thunderstorms are likely tonight, mainly north of US Highway 2 in
Minnesota. Some storms may be strong to severe with torrential
rain, which may lead to localized flooding, and damaging wind
gusts the main threats. The risk area includes many recreational
and wilderness areas in northern Minnesota, including the Chippewa
National Forest, Voyageurs National Park, Kabetogama State
Forest, the Superior National Forest, and the Boundary Waters
Canoe Area Wilderness.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Strong to severe thunderstorms may be ongoing Friday morning in
northern Minnesota and are expected to move out of the Northland
by late morning.

Hot and humid conditions are expected across much of the
Northland Friday afternoon. Heat index values between 90 and 105
degrees are forecast. A Heat Advisory may be needed for portions
of central Minnesota and northwest Wisconsin Friday afternoon.

Thunderstorms will be possible Friday night into Sunday morning
across the Northland. The storms Friday night through Saturday
night could be severe and produce heavy rainfall which could lead
to flooding.

.SPOTTER INFORMATION STATEMENT...

Skywarn Spotters may be needed this afternoon into this evening
and again later tonight.

LSZ121-140>148-291415-
Bayfield to Oak Point WI-Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
Duluth MN to Port Wing WI-Port Wing to Sand Island WI-
Sand Island to Bayfield WI-Oak Point to Saxon Harbor WI-
906 AM CDT Thu Jun 28 2018

This Hazardous Weather Outlook is for portions of the Nearshore
waters of western Lake Superior.

.DAY ONE...Today and Tonight

A few thunderstorms will be possible this afternoon and evening
over far western Lake Superior and again late tonight. Severe
storms could occur.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Thunderstorms will be possible Friday morning and again Friday
night through Sunday morning. Some of the storms could be severe
Friday morning and again Friday night into Saturday night.

Melde/Wolfe/Huyck

More information may be obtained at the following web address:
http://www.weather.gov/duluth (all lower case)

In the hours before

Special weather statement, Jun 28, 12:13 PM CDT, 1 hour 12 minutes before

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Special weather statement, Jun 28, 12:34 PM CDT, 51 minutes before

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Special weather statement, Jun 28, 12:45 PM CDT, 40 minutes before

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Special weather statement, Jun 28, 12:46 PM CDT, 39 minutes before

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Special weather statement, Jun 28, 12:53 PM CDT, 32 minutes before

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Special weather statement, Jun 28, 1:14 PM CDT, 11 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 7:03 PM CDT	Special Weather Statement	DLH	Lake	27 min
Jun 27, 7:45 PM CDT	Special Weather Statement	DLH		30 min
Jun 27, 8:59 PM CDT	Special Weather Statement	DLH	Carlton	31 min
Jun 28, 8:50 AM CDT	Special Weather Statement	DLH	Cass	25 min
Jun 28, 9:16 AM CDT	Special Weather Statement	DLH	Cass	29 min
Jun 28, 9:45 AM CDT	Special Weather Statement	DLH	Itasca	15 min
Jun 28, 9:58 AM CDT	Special Weather Statement	DLH	Itasca	32 min
Jun 28, 10:27 AM CDT	Special Weather Statement	DLH	Itasca	33 min
Jun 28, 10:45 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Cass, Itasca	30 min
Jun 28, 11:16 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Itasca	29 min
Jun 28, 11:45 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Itasca, Saint Louis	31 min
Jun 28, 12:13 PM CDT	Special Weather Statement	DLH	Cass	32 min
Jun 28, 12:34 PM CDT	Special Weather Statement	DLH	Carlton	11 min
Jun 28, 12:45 PM CDT	Special Weather Statement	DLH	Cass	30 min
Jun 28, 12:46 PM CDT	Special Weather Statement	DLH	Carlton	29 min
Jun 28, 12:53 PM CDT	Special Weather Statement	DLH	Aitkin	37 min
Jun 28, 1:03 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Itasca	29 min
Jun 28, 1:14 PM CDT	Special Weather Statement	DLH	Carlton	31 min
Jun 28, 1:41 PM CDT	Special Weather Statement	DLH	Carlton	34 min
Jun 28, 1:51 PM CDT	Special Marine Warning	DLH		54 min
Jun 28, 2:02 PM CDT	Special Weather Statement	DLH	Carlton	13 min
Jun 28, 2:24 PM CDT	Special Weather Statement	DLH	Aitkin	21 min
Jun 28, 2:30 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Itasca	45 min
Jun 28, 2:44 PM CDT	Special Weather Statement	DLH	Aitkin	31 min
Jun 28, 2:52 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Itasca	38 min
Jun 28, 3:00 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Saint Louis	30 min
Jun 28, 3:20 PM CDT	Special Weather Statement	DLH	Aitkin	25 min
Jun 28, 3:25 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Cass, Itasca	35 min
Jun 28, 3:30 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Saint Louis	30 min
Jun 28, 3:43 PM CDT	Special Weather Statement	DLH	Cass	32 min
Jun 28, 3:49 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Saint Louis	41 min
Jun 28, 3:55 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Cass, Itasca	50 min
Jun 28, 4:26 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Pine	49 min
Jun 28, 4:35 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Saint Louis	40 min
Jun 28, 5:12 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Pine	48 min
Jun 28, 5:15 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Pine	30 min
Jun 28, 5:34 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Pine	26 min
Jun 28, 5:46 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Pine	29 min
Jun 28, 5:59 PM CDT	Special Weather Statement	DLH	Pine	16 min
Jun 28, 6:10 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Pine	50 min
Jun 28, 4:31 PM CDT	Special Weather Statement	DLH	Ashland	14 min
Jun 28, 6:02 PM CDT	Special Weather Statement	DLH	Washburn	28 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2018 Every severe thunderstorm warning in 2018

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.