Alert archive / Texas / Lake Wind Advisories in 2012

Lake Wind Advisory 14, NWS Shreveport, LA

March 18, 201221 counties in Texas; 4 parishes in Louisiana; 4 counties in Arkansas

NWS Shreveport, LA issued this lake wind advisory at Mar 18, 2012, 7:45 AM CDT for 21 counties in Texas; 4 parishes in Louisiana; 4 counties in Arkansas. It took effect at Mar 18, 2012, 10:00 AM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Mar 18, 2012, 7:45 AM CDT (12:45 UTC)
In effect from: Mar 18, 2012, 10:00 AM CDT
Expired: Mar 18, 2012, 7:00 PM CDT
In force: 9 hr
Issued by: NWS Shreveport, LA

All 29 counties

Howard County, AR, Little River County, AR, Miller County, AR, Sevier County, AR, Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Sabine Parish, LA, Angelina County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Morris County, TX, Nacogdoches County, TX, Panola County, TX, Red River County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 62 km from the middle of the area, began a volume at 12:42 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

Fort Worth, TX (KFWD), launched 12:00Z, 0.8 hours before the alert went out and 265 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: 601 J/kg
Mixed-layer CIN: -232 J/kg
Mixed-layer LCL: 537 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 152 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this lake wind advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Shreveport, LA wrote its last area forecast discussion before this lake wind advisory went out at Mar 18, 3:38 AM CDT, 4 hours 7 minutes earlier.

Area forecast discussion, Mar 18, 3:38 AM CDT, 4 hours 7 minutes before

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Hazardous weather outlook, Mar 18, 5:33 AM CDT, 2 hours 12 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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Nearby

Lake Wind Advisories in Texas, 2012 Lake Wind Advisories in Louisiana, 2012 Lake Wind Advisories in Arkansas, 2012 Every lake wind 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.