Alert archive / Minnesota / Heat Advisories in 2016

Heat Advisory 2, NWS Duluth, MN

July 20, 2016Carlton County, Saint Louis County, Minnesota

NWS Duluth, MN issued this heat advisory at Jul 20, 2016, 3:56 AM CDT for Carlton County, Saint Louis County, Minnesota. It took effect at Jul 20, 2016, 3:39 PM CDT. It was in force for 29 hr.

The area

The counties it named.

The facts

Issued: Jul 20, 2016, 3:56 AM CDT (08:56 UTC)
In effect from: Jul 20, 2016, 3:39 PM CDT
Expired: Jul 21, 2016, 9:00 PM CDT
In force: 29 hr
Issued by: NWS Duluth, MN

Counties Carlton County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 39 km from the middle of the area, began a volume at 09:02 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 00:00Z, 8.9 hours before the alert went out and 173 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: 581 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 1561 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.2

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 20, 12:54 AM CDT, 3 hours 2 minutes earlier.

Area forecast discussion, Jul 20, 12:54 AM CDT, 3 hours 2 minutes before

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Hazardous weather outlook, Jul 19, 3:33 PM CDT, 12 hours 23 minutes before

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In the hours before

Special weather statement, Jul 19, 10:05 PM CDT, 5 hours 51 minutes before

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Special weather statement, Jul 19, 10:23 PM CDT, 5 hours 33 minutes before

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Special weather statement, Jul 19, 11:30 PM CDT, 4 hours 26 minutes before

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Special weather statement, Jul 19, 11:53 PM CDT, 4 hours 3 minutes before

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Special weather statement, Jul 20, 12:20 AM CDT, 3 hours 36 minutes before

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Special weather statement, Jul 20, 12:44 AM CDT, 3 hours 12 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 19, 10:05 PM CDT	Special Weather Statement	DLH		25 min
Jul 19, 10:23 PM CDT	Special Weather Statement	DLH	Itasca	37 min
Jul 19, 10:53 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Itasca	37 min
Jul 19, 11:30 PM CDT	Special Weather Statement	DLH	Cass	30 min
Jul 19, 11:53 PM CDT	Special Weather Statement	DLH	Itasca	37 min
Jul 20, 12:20 AM CDT	Special Weather Statement	DLH	Itasca	25 min
Jul 20, 12:44 AM CDT	Special Weather Statement	DLH	Itasca	31 min
Jul 20, 3:56 AM CDT	Excessive Heat Warning	DLH	Cass, Crow Wing	12 hr
Jul 20, 3:56 AM CDT	Heat Advisory	DLH	Aitkin, Cass, Crow Wing, Itasca, Koochiching, Pine	41 hr

Nearby

Heat Advisories in Minnesota, 2016 Every heat advisory in 2016

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.