Alert archive / Minnesota / Frost Advisories in 2011

Frost Advisory 3, NWS Duluth, MN

May 26, 20115 counties in Minnesota

NWS Duluth, MN issued this frost advisory at May 26, 2011, 2:03 PM CDT for 5 counties in Minnesota. It took effect at May 27, 2011, 12:00 AM CDT. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: May 26, 2011, 2:03 PM CDT (19:03 UTC)
In effect from: May 27, 2011, 12:00 AM CDT
Expired: May 27, 2011, 3:26 AM CDT
In force: 3 hr
Issued by: NWS Duluth, MN

Counties Cass County, MN, Cook County, MN, Crow Wing County, MN, Lake County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 55 km from the middle of the area, began a volume at 19:09 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 12:00Z, 7.1 hours before the alert went out and 154 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1396 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: -119 m²/s²
0-3 km storm-relative helicity: -60 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 May 25, 6:31 PM CDT, 19 hours 32 minutes earlier.

Area forecast discussion, May 25, 6:31 PM CDT, 19 hours 32 minutes before

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Hazardous weather outlook, May 25, 3:35 PM CDT, 22 hours 28 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
May 26, 3:47 AM CDT	Freeze Watch	DLH	Aitkin, Carlton, Cook, Itasca, Koochiching, Lake and 2 more	10 hr
May 26, 2:03 PM CDT	Freeze Warning	DLH	Aitkin, Carlton, Cook, Itasca, Koochiching, Lake and 2 more	17 hr

Nearby

Frost Advisories in Minnesota, 2011 Every frost advisory in 2011

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.