Alert archive / Minnesota / Frost Advisories in 2013

Frost Advisory 5, NWS Grand Forks, ND

October 12, 201318 counties in Minnesota; 12 counties in North Dakota

NWS Grand Forks, ND issued this frost advisory at Oct 12, 2013, 3:40 PM CDT for 18 counties in Minnesota; 12 counties in North Dakota. It took effect at Oct 13, 2013, 3:00 AM CDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Oct 12, 2013, 3:40 PM CDT (20:40 UTC)
In effect from: Oct 13, 2013, 3:00 AM CDT
Expired: Oct 13, 2013, 9:11 AM CDT
In force: 6 hr
Issued by: NWS Grand Forks, ND

All 30 counties

Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Grant County, MN, Hubbard County, MN, Kittson County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Grand Forks County, ND, Griggs County, ND, Nelson County, ND, Pembina County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 58 km from the middle of the area, began a volume at 20:42 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

Aberdeen, SD (KABR), launched 12:00Z, 8.7 hours before the alert went out and 315 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: 1058 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -61 m²/s²
0-3 km storm-relative helicity: 46 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 Grand Forks, ND wrote its last area forecast discussion before this frost advisory went out at Oct 12, 3:15 PM CDT, 25 minutes earlier.

Area forecast discussion, Oct 12, 3:15 PM CDT, 25 minutes before

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Hazardous weather outlook, Oct 12, 5:51 AM CDT, 9 hours 49 minutes before

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The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 12, 3:15 AM CDT	Wind Advisory	FGF	Barnes, Benson, Eddy, Griggs, Nelson, Ramsey and 1 more	8 hr

Nearby

Frost Advisories in Minnesota, 2013 Frost Advisories in North Dakota, 2013 Every frost advisory in 2013

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.