Alert archive / Arkansas / Lake Wind Advisories in 2012

Lake Wind Advisory 32, NWS Shreveport, LA

October 18, 20124 counties in Arkansas

NWS Shreveport, LA issued this lake wind advisory at Oct 18, 2012, 3:06 AM CDT for 4 counties in Arkansas. It took effect at Oct 18, 2012, 9:00 AM CDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Oct 18, 2012, 3:06 AM CDT (08:06 UTC)
In effect from: Oct 18, 2012, 9:00 AM CDT
Expired: Oct 18, 2012, 7:00 PM CDT
In force: 10 hr
Issued by: NWS Shreveport, LA

Counties Hempstead County, AR, Howard County, AR, Nevada County, AR, Sevier County, AR

The radar

The Shreveport radar (KSHV), 158 km from the middle of the area, began a volume at 08:08 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, 8.1 hours before the alert went out and 155 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: 2154 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 944 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 261 m²/s²
0-3 km storm-relative helicity: 336 m²/s²
Significant tornado parameter: 4.8
Supercell composite: 16.4

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 Oct 18, 3:04 AM CDT, 2 minutes earlier.

Area forecast discussion, Oct 18, 3:04 AM CDT, 2 minutes before

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Hazardous weather outlook, Oct 17, 11:07 AM CDT, 15 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1107 AM CDT WED OCT 17 2012

OKZ077-TXZ096-108>111-124-125-136-137-149-150-181100-
MCCURTAIN-RED RIVER-FRANKLIN-TITUS-CAMP-MORRIS-WOOD-UPSHUR-SMITH-
GREGG-CHEROKEE-RUSK-
1107 AM CDT WED OCT 17 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
OKLAHOMA AND NORTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT...

WINDS ARE FORECAST TO INCREASE TO AROUND 20 MPH WITH HIGHER GUSTS
TODAY AHEAD OF A STRONG COLD FRONT. SCATTERED SHOWERS AND
THUNDERSTORMS WILL DEVELOP ALONG THE FRONT LATE THIS AFTERNOON
AND EVENING. STRONG FORCING...SHEAR...AND INSTABILITY ALONG AND
AHEAD OF THE FRONT MAY RESULT IN ISOLATED SEVERE THUNDERSTORMS
DEVELOPING OVER THESE AREAS THIS EVENING...WITH DAMAGING WINDS AND
LARGE HAIL THE PRIMARY THREATS. ANY SEVERE WEATHER THREAT WILL
DIMINISH BY LATE EVENING...AS THE AIR MASS BEGINS TO STABILIZE
BEHIND THE COLD FRONT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

NO HAZARDOUS WEATHER IS EXPECTED.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO
OPERATORS...AND STORM SPOTTERS IS NOT ANTICIPATED THROUGH TONIGHT.

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-TXZ097-112-
126-138-151>153-165>167-181100-
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-BOWIE-CASS-MARION-
HARRISON-PANOLA-NACOGDOCHES-SHELBY-ANGELINA-SAN AUGUSTINE-
SABINE TX-
1107 AM CDT WED OCT 17 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA...
NORTHWEST LOUISIANA...EAST TEXAS AND NORTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT...

WINDS ARE FORECAST TO INCREASE TO AROUND 20 MPH WITH HIGHER GUSTS
TODAY AHEAD OF A STRONG COLD FRONT. SCATTERED SHOWERS AND
THUNDERSTORMS WILL DEVELOP ALONG THE FRONT THIS AFTERNOON OVER
SOUTHWEST ARKANSAS...NORTH LOUISIANA...AND ADJACENT PARTS OF
EXTREME EAST TEXAS. STRONG FORCING...SHEAR...AND INSTABILITY
ALONG AND AHEAD OF THE FRONT MAY RESULT IN SEVERE THUNDERSTORMS
DEVELOPING OVER THESE AREAS. DAMAGING WINDS AND LARGE HAIL WILL
THE PRIMARY THREAT WITH THESE STORMS. HOWEVER...ISOLATED TORNADOES
MAY ALSO BE POSSIBLE. THE SEVERE WEATHER THREAT WILL BEGIN TO DIMINISH
TONIGHT...AS THE AIR MASS BEGINS TO STABILIZE BEHIND THE COLD
FRONT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

NO HAZARDOUS WEATHER IS EXPECTED.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO
OPERATORS...AND STORM SPOTTERS MAY BE NECESSARY THIS AFTERNOON AND
TONIGHT.

12

In the hours before

Special weather statement, Oct 17, 9:29 PM CDT, 5 hours 37 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
929 PM CDT WED OCT 17 2012

LAZ006-014-180315-
OUACHITA-UNION-
929 PM CDT WED OCT 17 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL 1015 PM CDT...FOR THE FOLLOWING
PARISHES...

IN NORTH CENTRAL LOUISIANA...
     UNION AND OUACHITA...

INCLUDING THE FOLLOWING LOCATIONS...
     BROWNSVILLE-BAWCOMVILLE...CLAIBORNE...MONROE...RICHWOOD...SWARTZ
     AND WEST MONROE...

AT 925 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING A STRONG THUNDERSTORM 8 MILES WEST OF CLAIBORNE...MOVING
EAST AT 40 MPH.

DIME SIZE HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS
STORM. DIME SIZED HAIL WAS REPORTED WITH THIS STORM IN CALHOUN.

09

Local storm report, Oct 17, 9:31 PM CDT, 5 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
931 PM CDT WED OCT 17 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0924 PM     HAIL             10 WSW CLAIBORNE        32.51N 92.36W
10/17/2012  E0.75 INCH       OUACHITA           LA   BROADCAST MEDIA

&&

09

Special weather statement, Oct 17, 9:53 PM CDT, 5 hours 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
953 PM CDT WED OCT 17 2012

LAZ004>006-013-014-180345-
CLAIBORNE-JACKSON-LINCOLN-OUACHITA-UNION-
953 PM CDT WED OCT 17 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL 1045 PM CDT...FOR THE FOLLOWING
PARISHES...

IN NORTH CENTRAL LOUISIANA...
     UNION...OUACHITA...LINCOLN AND JACKSON...
IN NORTHWEST LOUISIANA...
     CLAIBORNE...

INCLUDING THE FOLLOWING LOCATIONS...
     GRAMBLING AND RUSTON...

AT 950 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING A STRONG THUNDERSTORM 8 MILES NORTH OF ARCADIA...OR 12
MILES SOUTHEAST OF HOMER...MOVING EAST AT 45 MPH.

PENNY SIZE HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THIS
STORM.

09

Local storm report, Oct 17, 11:03 PM CDT, 4 hours 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1103 PM CDT WED OCT 17 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1102 PM     TSTM WND DMG     10 SSW WEST MONROE      32.38N 92.21W
10/17/2012                   OUACHITA           LA   911 CALL CENTER

            TREES DOWN.

&&

ASTEVENS

Special weather statement, Oct 17, 11:53 PM CDT, 3 hours 13 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
Oct 17, 10:46 PM CDT	Severe Thunderstorm Warning	SHV	Jackson, Lincoln, Ouachita	44 min
Oct 17, 11:08 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Jackson, Ouachita, Winn	52 min
Oct 17, 7:29 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Union	46 min

Nearby

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.