Alert archive / Texas / Lake Wind Advisories in 2021

Lake Wind Advisory 17, NWS Shreveport, LA

April 28, 202121 counties in Texas; 6 parishes in Louisiana; 6 counties in Arkansas

NWS Shreveport, LA issued this lake wind advisory at Apr 28, 2021, 2:03 AM CDT for 21 counties in Texas; 6 parishes in Louisiana; 6 counties in Arkansas. It took effect at Apr 28, 2021, 9:00 AM CDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Apr 28, 2021, 2:03 AM CDT (07:03 UTC)
In effect from: Apr 28, 2021, 9:00 AM CDT
Expired: Apr 28, 2021, 7:00 PM CDT
In force: 10 hr
Issued by: NWS Shreveport, LA

All 33 counties

Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Sevier County, AR, Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Natchitoches Parish, LA, Red River 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), 51 km from the middle of the area, began a volume at 07:03 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

Fort Worth, TX (KFWD), launched 00:00Z, 7.1 hours before the alert went out and 277 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: 692 J/kg
Mixed-layer CIN: -275 J/kg
Mixed-layer LCL: 967 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 197 m²/s²
0-3 km storm-relative helicity: 388 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 Apr 28, 12:22 AM CDT, 1 hour 41 minutes earlier.

Area forecast discussion, Apr 28, 12:22 AM CDT, 1 hour 41 minutes before

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The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 28, 9:15 AM CDT	River Flood Warning	SHV	Smith, Wood	47 hr
Apr 28, 10:23 AM CDT	River Flood Warning	SHV	Franklin, Morris, Red River, Titus	6 days
Apr 28, 2:43 PM CDT	Flash Flood Watch	SHV	Bowie, Camp, Cass, Franklin, Morris, Red River and 3 more	23 hr

Nearby

Lake Wind Advisories in Texas, 2021 Lake Wind Advisories in Louisiana, 2021 Lake Wind Advisories in Arkansas, 2021 Every lake wind 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.