Alert archive / Mississippi / Dense Fog Advisories in 2012

Dense Fog Advisory 2, NWS Jackson, MS

January 9, 201239 counties in Mississippi; 9 parishes in Louisiana

NWS Jackson, MS issued this dense fog advisory at Jan 9, 2012, 5:04 AM CST for 39 counties in Mississippi; 9 parishes in Louisiana. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Jan 9, 2012, 5:04 AM CST (11:04 UTC)
Expired: Jan 9, 2012, 10:00 AM CST
In force: 5 hr
Issued by: NWS Jackson, MS

All 48 counties

Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Attala County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Kemper County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Warren County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 33 km from the middle of the area, began a volume at 11:03 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

Jackson, MS (KJAN), launched 00:00Z, 11.1 hours before the alert went out and 25 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: 584 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 672 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

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 Jackson, MS wrote its last area forecast discussion before this dense fog advisory went out at Jan 9, 4:24 AM CST, 40 minutes earlier.

Area forecast discussion, Jan 9, 4:24 AM CST, 40 minutes before

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Hazardous weather outlook, Jan 8, 10:07 PM CST, 6 hours 57 minutes before

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In the hours before

Special weather statement, Jan 8, 11:07 PM CST, 5 hours 57 minutes before

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Special weather statement, Jan 8, 11:10 PM CST, 5 hours 54 minutes before

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Local storm report, Jan 8, 11:46 PM CST, 5 hours 18 minutes before

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The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 8, 7:06 PM CST	Flash Flood Warning	JAN	Covington	26 days
Jan 8, 8:03 PM CST	Special Weather Statement	JAN	Jones	42 min
Jan 8, 8:08 PM CST	Special Weather Statement	JAN	Scott	42 min
Jan 8, 8:13 PM CST	Severe Thunderstorm Warning	JAN	Rankin, Scott	47 min
Jan 8, 8:42 PM CST	Severe Thunderstorm Warning	JAN	Leake	48 min
Jan 8, 9:08 PM CST	Special Weather Statement	JAN	Jones	27 min
Jan 8, 9:29 PM CST	Severe Thunderstorm Warning	JAN	Leake, Neshoba	31 min
Jan 8, 10:04 PM CST	Severe Thunderstorm Warning	JAN	Winston	41 min
Jan 8, 10:32 PM CST	Special Weather Statement	JAN	Leake	28 min
Jan 8, 11:00 PM CST	Severe Thunderstorm Warning	JAN	Winston	45 min
Jan 8, 11:07 PM CST	Special Weather Statement	JAN	Clarke	28 min
Jan 8, 11:10 PM CST	Special Weather Statement	JAN	Noxubee	30 min
Jan 8, 10:46 PM CST	Special Weather Statement	JAN	Madison	44 min

Nearby

Dense Fog Advisories in Mississippi, 2012 Dense Fog Advisories in Louisiana, 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.