Alert archive / Texas / Dense Fog Advisories in 2016

Dense Fog Advisory 13, NWS Austin/San Antonio, TX

May 28, 20169 counties in Texas

NWS Austin/San Antonio, TX issued this dense fog advisory at May 28, 2016, 2:22 AM CDT for 9 counties in Texas. It took effect at May 28, 2016, 3:00 AM CDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: May 28, 2016, 2:22 AM CDT (07:22 UTC)
In effect from: May 28, 2016, 3:00 AM CDT
Expired: May 28, 2016, 8:22 AM CDT
In force: 5 hr
Issued by: NWS Austin/San Antonio, TX

Counties Bastrop County, TX, Blanco County, TX, Burnet County, TX, Gillespie County, TX, Hays County, TX, Lee County, TX, Llano County, TX, Travis County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 69 km from the middle of the area, began a volume at 07:24 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

Corpus Christi, TX (KCRP), launched 00:00Z, 7.4 hours before the alert went out and 303 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: 4061 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 1156 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 11.1

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 Austin/San Antonio, TX wrote its last area forecast discussion before this dense fog advisory went out at May 28, 12:56 AM CDT, 1 hour 26 minutes earlier.

Area forecast discussion, May 28, 12:56 AM CDT, 1 hour 26 minutes before

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Hazardous weather outlook, May 27, 5:23 PM CDT, 8 hours 59 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 Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 28, 5:57 PM CDT	Severe Thunderstorm Warning	EWX	Medina	48 min
May 28, 6:26 PM CDT	Special Weather Statement	EWX	Bandera, Kerr	49 min
May 28, 6:43 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina	47 min
May 28, 6:56 PM CDT	Flash Flood Warning	EWX	Medina	3 hr

Nearby

Dense Fog Advisories in Texas, 2016 Every dense fog advisory in 2016

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.