Alert archive / Minnesota / Frost Advisories in 2015

Frost Advisory 7, NWS Duluth, MN

October 1, 201510 counties in Minnesota; 8 counties in Wisconsin

NWS Duluth, MN issued this frost advisory at Oct 1, 2015, 2:49 PM CDT for 10 counties in Minnesota; 8 counties in Wisconsin. It took effect at Oct 2, 2015, 12:00 AM CDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Oct 1, 2015, 2:49 PM CDT (19:49 UTC)
In effect from: Oct 2, 2015, 12:00 AM CDT
Expired: Oct 2, 2015, 8:00 AM CDT
In force: 8 hr
Issued by: NWS Duluth, MN

Counties Aitkin County, MN, Carlton County, MN, Cass County, MN, Cook County, MN, Crow Wing County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Pine County, MN, Saint Louis County, MN, Ashland County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Iron County, WI, Price County, WI, Sawyer County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 15 km from the middle of the area, began a volume at 19:55 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.8 hours before the alert went out and 401 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: 4 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 939 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -92 m²/s²
0-3 km storm-relative helicity: -105 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 frost 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 frost advisory went out at Oct 1, 12:58 PM CDT, 1 hour 51 minutes earlier.

Area forecast discussion, Oct 1, 12:58 PM CDT, 1 hour 51 minutes before

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Hazardous weather outlook, Oct 1, 9:12 AM CDT, 5 hours 37 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
Oct 1, 9:11 AM CDT	Beach Hazards Statement	DLH	Carlton, Saint Louis	12 hr
Oct 1, 9:13 AM CDT	Small Craft Advisory	DLH		66 hr

Nearby

Frost Advisories in Minnesota, 2015 Frost Advisories in Wisconsin, 2015 Every frost advisory in 2015

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.