Alert archive / Minnesota / Heat Advisories in 2021

Heat Advisory 1, NWS Duluth, MN

June 10, 2021Cass County, Crow Wing County, Pine County, Minnesota; Burnett County, Wisconsin

NWS Duluth, MN issued this heat advisory at Jun 10, 2021, 4:08 AM CDT for Cass County, Crow Wing County, Pine County, Minnesota; Burnett County, Wisconsin. It took effect at Jun 10, 2021, 1:00 PM CDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Jun 10, 2021, 4:08 AM CDT (09:08 UTC)
In effect from: Jun 10, 2021, 1:00 PM CDT
Expired: Jun 10, 2021, 7:00 PM CDT
In force: 6 hr
Issued by: NWS Duluth, MN

Counties Cass County, MN, Crow Wing County, MN, Pine County, MN, Burnett County, WI

The radar

The Duluth radar (KDLH), 104 km from the middle of the area, began a volume at 09:10 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 9.1 hours before the alert went out and 168 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: 765 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 2305 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 37 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 heat advisory 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 heat advisory went out at Jun 10, 12:27 AM CDT, 3 hours 41 minutes earlier.

Area forecast discussion, Jun 10, 12:27 AM CDT, 3 hours 41 minutes before

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Hazardous weather outlook, Jun 9, 2:53 PM CDT, 13 hours 15 minutes before

Hazardous Weather Outlook
National Weather Service Duluth MN
253 PM CDT Wed Jun 9 2021

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-102000-
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-
253 PM CDT Wed Jun 9 2021

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

.DAY ONE...This afternoon and Tonight

Thunderstorms are possible across much of the Northland into
tonight, with chances highest over far northern and western areas.
Isolated severe thunderstorms are possible, most likely over far
north central Minnesota. Large hail and damaging winds are the
main hazards. All storms will also be capable of producing
frequent lightning and heavy rainfall. A couple rounds of storms
are possible in far northern Minnesota which may lead to the
heavy rainfall.

There is a high risk of rip currents along the beaches of Park
Point into this evening.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

More isolated severe thunderstorms are possible Thursday across
much of northwest Wisconsin and east central Minnesota during the
afternoon and evening. Damaging winds are the main threat with
those storms. Thunderstorms are also expected across portions of
the rest of the Northland Thursday into Thursday evening.

There will be chances in spots for more thunderstorms Friday into
Sunday.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotters are encouraged to report hail of any size and
rainfall amounts to the National Weather Service.

LSZ121-140>148-150-102000-
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-
Outer Apostle Islands Beyond 5 NM from Mainland-
253 PM CDT Wed Jun 9 2021

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

.DAY ONE...This afternoon and Tonight

Northeast winds will lead to hazardous conditions for small craft
in the far southwest arm of Lake Superior this afternoon and
evening. A Small Craft Advisory has been issued through 10 PM.

Thunderstorms are possible tonight. Gusty winds, frequent
lightning, small hail, and heavy rain may occur. Wind and waves
will be higher in and near any thunderstorms.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

More thunderstorms, some possibly severe, will occur Thursday into
Thursday evening. The greatest risk for strong storms will be
along the South Shore. Strong winds are the main threat.

Increasing northeast winds Thursday night into Friday may lead to
hazardous conditions for small craft, especially from Two Harbors
to the Twin Ports to Port Wing.

There will be chances for more thunderstorms Friday into Sunday.

Melde

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 9, 10:10 PM CDT, 5 hours 58 minutes before

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Special weather statement, Jun 9, 10:17 PM CDT, 5 hours 51 minutes before

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Special weather statement, Jun 9, 10:17 PM CDT, 5 hours 51 minutes before

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Special weather statement, Jun 9, 11:29 PM CDT, 4 hours 39 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 9, 8:01 PM CDT	Special Weather Statement	DLH		14 min
Jun 9, 8:08 PM CDT	Special Weather Statement	DLH	Itasca	22 min
Jun 9, 8:21 PM CDT	Special Weather Statement	DLH		24 min
Jun 9, 8:21 PM CDT	Special Weather Statement	DLH		24 min
Jun 9, 8:45 PM CDT	Special Weather Statement	DLH		15 min
Jun 9, 9:02 PM CDT	Special Weather Statement	DLH		13 min
Jun 9, 9:03 PM CDT	Special Weather Statement	DLH		27 min
Jun 9, 9:13 PM CDT	Special Weather Statement	DLH		17 min
Jun 9, 9:16 PM CDT	Special Weather Statement	DLH	Itasca	14 min
Jun 9, 9:21 PM CDT	Special Weather Statement	DLH		24 min
Jun 9, 9:29 PM CDT	Areal Flood Advisory	DLH	Koochiching, Saint Louis	3 hr
Jun 9, 9:30 PM CDT	Special Weather Statement	DLH		15 min
Jun 9, 9:45 PM CDT	Special Weather Statement	DLH		30 min
Jun 9, 9:47 PM CDT	Special Weather Statement	DLH		13 min
Jun 9, 9:50 PM CDT	Special Weather Statement	DLH		25 min
Jun 9, 10:07 PM CDT	Special Weather Statement	DLH		23 min
Jun 9, 10:10 PM CDT	Special Weather Statement	DLH	Saint Louis	20 min
Jun 9, 10:17 PM CDT	Special Weather Statement	DLH		28 min
Jun 9, 10:17 PM CDT	Special Weather Statement	DLH		28 min
Jun 9, 11:29 PM CDT	Special Weather Statement	DLH		31 min
Jun 10, 6:33 AM CDT	Marine Dense Fog Advisory	DLH		55 hr
Jun 10, 3:20 PM CDT	Small Craft Advisory	DLH		33 hr
Jun 10, 4:34 PM CDT	Special Weather Statement	DLH	Crow Wing	26 min
Jun 10, 1:45 PM CDT	Special Weather Statement	DLH	Bayfield	15 min
Jun 10, 3:32 PM CDT	Special Weather Statement	DLH	Bayfield	13 min
Jun 10, 3:38 PM CDT	Special Weather Statement	DLH	Douglas	22 min
Jun 10, 4:38 PM CDT	Special Weather Statement	DLH	Price	22 min
Jun 10, 4:52 PM CDT	Special Weather Statement	DLH	Iron	23 min
Jun 10, 5:02 PM CDT	Special Weather Statement	DLH	Price	28 min
Jun 10, 5:26 PM CDT	Special Weather Statement	DLH	Price	19 min
Jun 10, 5:36 PM CDT	Areal Flood Advisory	DLH	Ashland, Iron, Price	3 hr
Jun 10, 5:42 PM CDT	Special Weather Statement	DLH	Price	33 min
Jun 10, 5:52 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Iron, Price	23 min
Jun 10, 6:08 PM CDT	Flash Flood Warning	DLH	Iron, Price	3 hr
Jun 10, 6:18 PM CDT	Special Weather Statement	DLH	Price	12 min
Jun 10, 6:25 PM CDT	Special Weather Statement	DLH	Price	20 min
Jun 10, 6:40 PM CDT	Special Weather Statement	DLH	Price	20 min
Jun 10, 6:47 PM CDT	Special Weather Statement	DLH	Iron	13 min

Nearby

Heat Advisories in Minnesota, 2021 Heat Advisories in Wisconsin, 2021 Every heat advisory in 2021

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.