Alert archive / Minnesota / Heat Advisories in 2021

Heat Advisory 2, NWS Duluth, MN

July 22, 2021Pine County, Minnesota; Burnett County, Wisconsin

NWS Duluth, MN issued this heat advisory at Jul 22, 2021, 7:38 PM CDT for Pine County, Minnesota; Burnett County, Wisconsin. It took effect at Jul 23, 2021, 1:00 PM CDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Jul 22, 2021, 7:38 PM CDT (00:38 UTC)
In effect from: Jul 23, 2021, 1:00 PM CDT
Expired: Jul 23, 2021, 7:00 PM CDT
In force: 6 hr
Issued by: NWS Duluth, MN

Counties Pine County, MN, Burnett County, WI

The radar

The Duluth radar (KDLH), 98 km from the middle of the area, began a volume at 00:39 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, 0.6 hours before the alert went out and 151 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: 80 J/kg
Mixed-layer CIN: -140 J/kg
Mixed-layer LCL: 1371 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 193 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

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 Jul 22, 6:26 PM CDT, 1 hour 12 minutes earlier.

Area forecast discussion, Jul 22, 6:26 PM CDT, 1 hour 12 minutes before

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Hazardous weather outlook, Jul 22, 3:42 PM CDT, 3 hours 56 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
Jul 23, 3:44 PM CDT	Special Weather Statement	DLH	Koochiching	16 min
Jul 23, 3:57 PM CDT	Special Weather Statement	DLH	Koochiching	18 min
Jul 23, 4:11 PM CDT	Special Weather Statement	DLH	Koochiching	19 min
Jul 23, 4:28 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching, Saint Louis	62 min
Jul 23, 4:46 PM CDT	Special Weather Statement	DLH	Koochiching	14 min
Jul 23, 4:50 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	22 min
Jul 23, 4:59 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching	38 min
Jul 23, 5:34 PM CDT	Severe Thunderstorm Warning	DLH	Itasca	45 min
Jul 23, 5:42 PM CDT	Special Weather Statement	DLH		18 min
Jul 23, 6:05 PM CDT	Special Weather Statement	DLH		25 min
Jul 23, 6:28 PM CDT	Severe Thunderstorm Warning	DLH	Cook, Lake, Saint Louis	62 min
Jul 23, 6:35 PM CDT	Special Weather Statement	DLH	Itasca	25 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.