Alert archive / Wisconsin / Frost Advisories in 2015

Frost Advisory 11, NWS Green Bay, WI

September 30, 20159 counties in Wisconsin

NWS Green Bay, WI issued this frost advisory at Sep 30, 2015, 2:48 PM CDT for 9 counties in Wisconsin. It took effect at Oct 1, 2015, 1:00 AM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Sep 30, 2015, 2:48 PM CDT (19:48 UTC)
In effect from: Oct 1, 2015, 1:00 AM CDT
Expired: Oct 1, 2015, 8:00 AM CDT
In force: 7 hr
Issued by: NWS Green Bay, WI

Counties Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Portage County, WI, Shawano County, WI, Waupaca County, WI, Waushara County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 77 km from the middle of the area, began a volume at 19:50 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 78 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: 954 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 20 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 Green Bay, WI wrote its last area forecast discussion before this frost advisory went out at Sep 30, 12:22 PM CDT, 2 hours 26 minutes earlier.

Area forecast discussion, Sep 30, 12:22 PM CDT, 2 hours 26 minutes before

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Hazardous weather outlook, Sep 30, 2:46 PM CDT, 2 minutes before

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The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 30, 2:48 PM CDT	Freeze Warning	GRB	Florence, Forest, Langlade, Lincoln, Oneida, Vilas	17 hr
Sep 30, 3:59 PM CDT	Small Craft Advisory	GRB		3 days

Nearby

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.