Alert archive / Tennessee / Dense Fog Advisories in 2021

Dense Fog Advisory 8, NWS Memphis, TN

May 26, 202110 counties in Mississippi; 15 counties in Tennessee

NWS Memphis, TN issued this dense fog advisory at May 26, 2021, 9:11 PM CDT for 10 counties in Mississippi; 15 counties in Tennessee. It took effect at May 26, 2021, 10:00 PM CDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: May 26, 2021, 9:11 PM CDT (02:11 UTC)
In effect from: May 26, 2021, 10:00 PM CDT
Expired: May 27, 2021, 9:00 AM CDT
In force: 11 hr
Issued by: NWS Memphis, TN

All 25 counties

Alcorn County, MS, Benton County, MS, Itawamba County, MS, Lee County, MS, Marshall County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Madison County, TN, McNairy County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 105 km from the middle of the area, began a volume at 02:14 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

Nashville Metro, TN (KBNA), launched 00:00Z, 2.2 hours before the alert went out and 216 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: 14 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 1041 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 70 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 Memphis, TN wrote its last area forecast discussion before this dense fog advisory went out at May 26, 6:42 PM CDT, 2 hours 29 minutes earlier.

Area forecast discussion, May 26, 6:42 PM CDT, 2 hours 29 minutes before

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Hazardous weather outlook, May 26, 9:04 AM CDT, 12 hours 7 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 27, 6:32 PM CDT	Special Weather Statement	MEG	Lake	28 min
May 27, 6:59 PM CDT	Special Weather Statement	MEG	Dyer, Lake, Obion	31 min
May 27, 5:30 PM CDT	Special Weather Statement	MEG	Clay	30 min
May 27, 5:44 PM CDT	Special Weather Statement	MEG	Greene	31 min
May 27, 5:57 PM CDT	Special Weather Statement	MEG	Clay	33 min
May 27, 6:13 PM CDT	Special Weather Statement	MEG	Craighead, Greene	32 min
May 27, 6:56 PM CDT	Special Weather Statement	MEG	Craighead, Greene, Mississippi	49 min

Nearby

Dense Fog Advisories in Tennessee, 2021 Dense Fog Advisories in Mississippi, 2021 Every dense fog advisory in 2021

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.