Alert archive / Minnesota / Dense Fog Advisories in 2018

Dense Fog Advisory 5, NWS Twin Cities, MN

July 14, 201826 counties in Minnesota; 9 counties in Wisconsin

NWS Twin Cities, MN issued this dense fog advisory at Jul 14, 2018, 3:04 AM CDT for 26 counties in Minnesota; 9 counties in Wisconsin. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Jul 14, 2018, 3:04 AM CDT (08:04 UTC)
Expired: Jul 14, 2018, 8:00 AM CDT
In force: 5 hr
Issued by: NWS Twin Cities, MN

All 35 counties

Anoka County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kandiyohi County, MN, Le Sueur County, MN, McLeod County, MN, Meeker County, MN, Nicollet County, MN, Ramsey County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN, Barron County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 20 km from the middle of the area, began a volume at 08:07 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 00:00Z, 8.1 hours before the alert went out and 414 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: 347 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 1099 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -41 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -2.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this dense fog advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Twin Cities, MN wrote its last area forecast discussion before this dense fog advisory went out at Jul 13, 6:46 PM CDT, 8 hours 18 minutes earlier.

Area forecast discussion, Jul 13, 6:46 PM CDT, 8 hours 18 minutes before

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Hazardous weather outlook, Jul 13, 6:33 PM CDT, 8 hours 31 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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Nearby

Dense Fog Advisories in Minnesota, 2018 Dense Fog Advisories in Wisconsin, 2018 Every dense fog advisory in 2018

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.