Alert archive / Minnesota / Frost Advisories in 2017
Frost Advisory 4, NWS Duluth, MN
NWS Duluth, MN issued this frost advisory at Sep 7, 2017, 2:13 PM CDT for Cook County, Lake County, Saint Louis County, Minnesota; Ashland County, Iron County, Price County, Wisconsin. It took effect at Sep 8, 2017, 1:00 AM CDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Sep 7, 2017, 2:13 PM CDT (19:13 UTC)
- In effect from
- Sep 8, 2017, 1:00 AM CDT
- Expired
- Sep 8, 2017, 8:00 AM CDT
- In force
- 7 hr
- Issued by
- NWS Duluth, MN
Counties Cook County, MN, Lake County, MN, Saint Louis County, MN, Ashland County, WI, Iron County, WI, Price County, WI
The radar
The Duluth radar (KDLH), 95 km from the middle of the area, began a volume at 19:16 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, 7.2 hours before the alert went out and 349 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.
- Mixed-layer CAPE
- 6 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 799 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Sep 7, 12:18 PM CDT, 1 hour 55 minutes earlier.
Area forecast discussion, Sep 7, 12:18 PM CDT, 1 hour 55 minutes before
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</html>Hazardous weather outlook, Sep 7, 4:18 AM CDT, 9 hours 55 minutes before
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</html>Nearby
Frost Advisories in Minnesota, 2017Frost Advisories in Wisconsin, 2017Every frost advisory in 2017
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.