Alert archive / Ohio / Dense Fog Advisories in 2012

Dense Fog Advisory 2, NWS Cleveland, OH

February 23, 201226 counties in Ohio; Crawford County, Erie County, Pennsylvania

NWS Cleveland, OH issued this dense fog advisory at Feb 23, 2012, 3:51 AM EST for 26 counties in Ohio; Crawford County, Erie County, Pennsylvania. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Feb 23, 2012, 3:51 AM EST (08:51 UTC)
Expired: Feb 23, 2012, 9:00 AM EST
In force: 5 hr
Issued by: NWS Cleveland, OH

All 28 counties

Ashland County, OH, Ashtabula County, OH, Crawford County, OH, Cuyahoga County, OH, Erie County, OH, Geauga County, OH, Hancock County, OH, Huron County, OH, Lake County, OH, Lorain County, OH, Lucas County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Morrow County, OH, Ottawa County, OH, Portage County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Wayne County, OH, Wood County, OH, Wyandot County, OH, Crawford County, PA, Erie County, PA

The radar

The Cleveland radar (KCLE), 29 km from the middle of the area, began a volume at 08:51 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

Detroit, MI (KDTX), launched 00:00Z, 8.9 hours before the alert went out and 199 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: 966 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 125 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 dense fog advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Cleveland, OH wrote its last area forecast discussion before this dense fog advisory went out at Feb 22, 11:33 PM EST, 4 hours 18 minutes earlier.

Area forecast discussion, Feb 22, 11:33 PM EST, 4 hours 18 minutes before

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Nearby

Dense Fog Advisories in Ohio, 2012 Dense Fog Advisories in Pennsylvania, 2012 Every dense fog advisory in 2012

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.