Alert archive / Texas / Lake Wind Advisories in 2012
Lake Wind Advisory 41, NWS Shreveport, LA
NWS Shreveport, LA issued this lake wind advisory at Dec 9, 2012, 11:53 PM CST for 13 counties in Texas; 4 parishes in Louisiana; 9 counties in Arkansas. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Dec 9, 2012, 11:53 PM CST (05:53 UTC)
- Expired
- Dec 10, 2012, 11:01 AM CST
- In force
- 11 hr
- Issued by
- NWS Shreveport, LA
All 26 counties
Columbia County, AR, Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Sevier County, AR, Union County, AR, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, Webster Parish, LA, Bowie County, TX, Camp County, TX, Cass County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Morris County, TX, Red River County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 83 km from the middle of the area, began a volume at 05:55 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
Shreveport, LA (KSHV), launched 00:00Z, 5.9 hours before the alert went out and 84 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.
- Mixed-layer CAPE
- 928 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 874 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 161 m²/s²
- 0-3 km storm-relative helicity
- 192 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 3.3
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 Dec 9, 9:38 PM CST, 2 hours 15 minutes earlier.
Area forecast discussion, Dec 9, 9:38 PM CST, 2 hours 15 minutes before
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</html>Hazardous weather outlook, Dec 9, 11:55 AM CST, 11 hours 58 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SHREVEPORT LA 1155 AM CST SUN DEC 9 2012 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-101800- SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE- COLUMBIA-UNION AR-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN- UNION LA-DE SOTO-RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA- NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE-MCCURTAIN-BOWIE- FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-GREGG- HARRISON-CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA- SAN AUGUSTINE-SABINE TX- 1155 AM CST SUN DEC 9 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA... NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND NORTHEAST TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT... THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG AND AHEAD OF A COLD FRONT THIS AFTERNOON AND EVENING. THERE IS A CHANCE SOME OF THESE STORMS COULD BECOME SEVERE. THE ATMOSPHERE AHEAD OF THE FRONT IS MODERATELY UNSTABLE WITH MLCAPE VALUES OF AROUND 1000 J/KG. AVAILABLE DEEP LAYER SHEAR WILL PROMOTE SUPERCELL DEVELOPMENT. ALSO...BY SUNSET THIS EVENING...A SQUALL LINE IS EXPECTED TO ORGANIZE...BRINGING THE FOCUS TO LOCALLY DAMAGING WIND GUSTS. A TORNADO OR TWO IS ALSO POSSIBLE THIS EVENING AS LOW LEVEL WINDS STRENGTHEN FURTHER. THE AREA OF MOST CONCERN FOR SEVERE WEATHER WILL BE ACROSS SOUTHCENTRAL ARKANSAS INTO NORTHCENTRAL LOUISIANA THIS EVENING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY... NO NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO OPERATORS...AND STORM SPOTTERS WILL LIKELY BE REQUIRED THIS AFTERNOON AND CONTINUE THROUGH MUCH OF TONIGHT.
In the hours before
Local storm report, Dec 9, 9:53 PM CST, 2 hours before
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</html>Special weather statement, Dec 9, 9:55 PM CST, 1 hour 58 minutes before
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</html>Special weather statement, Dec 9, 10:16 PM CST, 1 hour 37 minutes before
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</html>Local storm report, Dec 9, 10:36 PM CST, 1 hour 17 minutes before
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</html>Local storm report, Dec 9, 10:42 PM CST, 1 hour 11 minutes before
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</html>Local storm report, Dec 9, 11:04 PM CST, 49 minutes before
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</html>The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 9, 8:51 PM CST | Areal Flood Advisory | SHV | Angelina, Nacogdoches, Sabine, San Augustine | 3 hr |
| Dec 9, 8:07 PM CST | Severe Thunderstorm Warning | SHV | Bienville, Jackson, Natchitoches, Red River, Winn | 38 min |
| Dec 9, 8:21 PM CST | Tornado Warning | SHV | Bienville, Natchitoches, Winn | 24 min |
| Dec 9, 8:44 PM CST | Severe Thunderstorm Warning | SHV | Bienville, Jackson, Winn | 46 min |
| Dec 9, 9:10 PM CST | Severe Thunderstorm Warning | SHV | Caldwell, Jackson, Ouachita, Winn | 50 min |
| Dec 9, 9:25 PM CST | Severe Thunderstorm Warning | SHV | Caldwell, Jackson, Ouachita | 35 min |
Nearby
Lake Wind Advisories in Texas, 2012Lake Wind Advisories in Arkansas, 2012Lake Wind Advisories in Louisiana, 2012Every 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.