Alert archive / Minnesota / Frost Advisories in 2006

Frost Advisory 2, NWS Duluth, MN

September 8, 20067 counties in Minnesota

NWS Duluth, MN issued this frost advisory at Sep 8, 2006, 3:29 PM CDT for 7 counties in Minnesota. It took effect at Sep 9, 2006, 12:00 AM CDT. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Sep 8, 2006, 3:29 PM CDT (20:29 UTC)
In effect from: Sep 9, 2006, 12:00 AM CDT
Expired: Sep 9, 2006, 3:31 AM CDT
In force: 4 hr
Issued by: NWS Duluth, MN

Counties Aitkin County, MN, Cass County, MN, Cook County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 83 km from the middle of the area, began a volume at 20:30 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, 8.5 hours before the alert went out and 491 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: 49 J/kg
Mixed-layer CIN: -190 J/kg
Mixed-layer LCL: 1412 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Sep 7, 4:51 PM CDT, 22 hours 38 minutes earlier.

Area forecast discussion, Sep 7, 4:51 PM CDT, 22 hours 38 minutes before

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Nearby

Frost Advisories in Minnesota, 2006 Every frost advisory in 2006

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.