Alert archive / Ohio / Dense Fog Advisories in 2012

Dense Fog Advisory 4, NWS Cleveland, OH

March 19, 201212 counties in Ohio

NWS Cleveland, OH issued this dense fog advisory at Mar 19, 2012, 3:51 AM EDT for 12 counties in Ohio. It took effect at Mar 19, 2012, 5:00 AM EDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Mar 19, 2012, 3:51 AM EDT (07:51 UTC)
In effect from: Mar 19, 2012, 5:00 AM EDT
Expired: Mar 19, 2012, 10:00 AM EDT
In force: 5 hr
Issued by: NWS Cleveland, OH

Counties Cuyahoga County, OH, Erie County, OH, Huron County, OH, Lorain County, OH, Lucas County, OH, Medina County, OH, Ottawa County, OH, Portage County, OH, Sandusky County, OH, Seneca County, OH, Summit County, OH, Wood County, OH

The radar

The Cleveland radar (KCLE), 55 km from the middle of the area, began a volume at 07:55 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

Pittsburgh, PA (KPIT), launched 00:00Z, 7.9 hours before the alert went out and 227 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: 89 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1241 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 63 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 Mar 19, 2:06 AM EDT, 1 hour 45 minutes earlier.

Area forecast discussion, Mar 19, 2:06 AM EDT, 1 hour 45 minutes before

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Hazardous weather outlook, Mar 18, 11:18 PM EDT, 4 hours 33 minutes before

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The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 18, 11:05 PM EDT	River Flood Warning	CLE	Lorain	19 hr
Mar 19, 3:31 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Marion, Wyandot	44 min
Mar 19, 4:18 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Morrow, Richland	57 min
Mar 19, 5:30 PM EDT	Areal Flood Advisory	CLE	Huron	3 hr
Mar 19, 5:35 PM EDT	Areal Flood Advisory	CLE	Ashland	3 hr
Mar 19, 6:15 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Wayne	60 min
Mar 19, 6:27 PM EDT	Areal Flood Advisory	CLE	Wayne	2 hr

Nearby

Dense Fog Advisories in Ohio, 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.