Alert archive / Louisiana / Special Weather Statements in 2012

Special Weather Statement, NWS Lake Charles, LA

June 12, 20124 parishes in Louisiana; Jasper County, Newton County, Texas

NWS Lake Charles, LA issued this special weather statement at Jun 12, 2012, 9:53 AM CDT for 4 parishes in Louisiana; Jasper County, Newton County, Texas. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 12, 2012, 9:53 AM CDT (14:53 UTC)
Expired: Jun 12, 2012, 11:00 AM CDT
In force: 67 min
Issued by: NWS Lake Charles, LA

Counties Allen Parish, LA, Beauregard Parish, LA, Evangeline Parish, LA, Saint Landry Parish, LA, Jasper County, TX, Newton County, TX

The radar

The Lake Charles radar (KLCH), 58 km from the middle of the area, began a volume at 14:53 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 2.9 hours before the alert went out and 58 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: 3877 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 540 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

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

NWS Lake Charles, LA wrote its last area forecast discussion before this special weather statement went out at Jun 12, 7:48 AM CDT, 2 hours 5 minutes earlier.

Area forecast discussion, Jun 12, 7:48 AM CDT, 2 hours 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
748 AM CDT TUE JUN 12 2012

.DISCUSSION...
UPDATE FOR RECENTLY ISSUED SEVERE THUNDERSTORM WATCH...IN EFFECT
FOR THE ENTIRE CWA UNTIL 2 PM. UPSTREAM MCS OVER NORTHERN
LOUISIANA HAS INDEED MADE MORE OF A SOUTHWARD TURN AS IT HEADS
INTO CENTRAL LOUISIANA. ALTHOUGH SOME WEAKENING DID OCCUR EARLIER...IT
HAS MAINTAINED ITSELF WELL FOR THE PAST COUPLE OF HOURS.
POP...WX...AND QPF GRIDS WERE UPDATED ACCORDINGLY...CLOSER TO THE
HIRES MODEL SOLUTIONS MENTIONED IN THE EARLIER DISCUSSION.

13

&&

.PREV DISCUSSION... /ISSUED 635 AM CDT TUE JUN 12 2012/

AVIATION...A LINE OF STORMS IS DROPPING SE INTO CENTRAL LA AND
WILL LIKELY IMPACT KAEX OVER THE NEXT HR OR TWO WITH GUSTY WINDS
AND LOW VIS AND CEILINGS POTENTIALLY INTO IFR OR LIFR CATS. ELSEWHERE
PERIODIC MVFR CEILINGS AND VIS MAY OCCUR THIS MORNING. LATER AND
TOWARD MID DAY THE LINE AND OUTFLOW BOUNDARY WILL CONTINUE SE AND
POSSIBLY IMPACT THE TERMINALS IN ACADIANA INTO SE TX AS MORE
SHOWERS AND STORMS DEVELOP. A TEMPO GROUP IS IN KAEX THIS MORNING, BUT
DUE TO UNCERTAINTIES ABOUT THE EVOLUTION OF THE LINE, NO TEMPO
GROUP WAS ADDED TO THE OTHER TAFS... JUST VCTS. WINDS WILL BE
SOMEWHAT VRB AT KARA, KLFT, AND KAEX THIS MORNING, BUT WINDS WILL
GRADUALLY BECOME SOUTH TO SOUTHWEST TODAY THROUGH THIS EVENING.

PREV DISCUSSION... /ISSUED 538 AM CDT TUE JUN 12 2012/

DISCUSSION...REGIONAL RADARS CONTINUE TO BE QUITE ACTIVE THIS
MORNING...AND DEPICT AN ARRAY OF MESOSCALE FEATURES. THE MCS THAT
TRACKED THROUGH SOUTHERN MS/SE LA EARLIER TONIGHT HAS RESULTED IN
A N-S ORIENTED OUTFLOW BOUNDARY CURRENTLY NEAR AN ALEXANDRIA TO
LAFAYETTE LINE...CONTINUING TO MOVE OFF TO THE WEST. AHEAD OF THIS
FEATURE...AN APPARENT GRAVITY WAVE WAS NOTED ON RADAR IMAGERY
PROPAGATING SOUTHWESTWARD ACROSS THE AREA...HELPING INITIATE THE
SHOWER AND THUNDERSTORM ACTIVITY CURRENTLY OVER SW LA/SE TX.
FARTHER NORTH...A MORE SIGNIFICANT CONVECTIVE COMPLEX WAS ROLLING
ESEWD THRU NRN LA/SRN AR.

UNUSUALLY LOW CONFIDENCE IN THE VERY SHORT TERM FORECAST...WHICH
WILL BE HEAVILY INFLUENCED BY THE AFOREMENTIONED FEATURES...ALONG
WITH THE APPROACH OF A SLOW MOVING FRONT CURRENTLY INVOF THE RED
RIVER VALLEY/SRN AR.

CONVECTION TO THE NORTH LOOKS TO PERHAPS BE LOSING A BIT OF
INTENSITY AS IT HEADS THROUGH NORTHERN LOUISIANA...WITH OUTFLOW ON
THE WESTERN FLANK STARTING TO OUTRUN THE CONVECTIVE CELLS.
DEPICTIONS BY HIGH RESOLUTION MODELS SHOWING A DECAYING MCS
TRACKING SOUTHWARD THROUGH THE AREA MAY NOT BE TOO FAR OFF THE
MARK...THOUGH DEFINITELY DISPLACED TOO FAR TO THE WEST AND MAYBE A
LITTLE TOO ROBUST WITH THE QPF. NONETHELESS...THESE SOLUTIONS ARE
MORE BELIEVABLE THAN THE GLOBAL MODEL SOLUTIONS...WHICH SHOW
LITTLE TO NOTHING IN THE AREA UNTIL LATER THIS AFTERNOON.
THUS...THE POP FCST FOR TODAY WAS BASICALLY A COMBINATION OF
CURRENT RADAR TRENDS PLUS AN EASTWARD SHIFTED HIRES MODEL
SOLUTION.

BEYOND TODAY...FRONTAL BOUNDARY TO THE NORTH IS EXPECTED TO
CONTINUE A SLOW SOUTHWARD MOVEMENT...REACHING THE I-20 CORRIDOR BY
THIS EVENING...THEN NEAR THE ALEXANDRIA AREA BY WEDNESDAY EVENING.
GIVEN THE PROXIMITY OF THE BOUNDARY...ITS ASSOCIATED MOISTURE
POOL...AND PERTURBATIONS IN THE NW FLOW ALOFT...THE RISK OF
ADDITIONAL TSTM COMPLEXES WILL REMAIN IN PLACE FOR THE NEXT FEW
DAYS IN ADDITION TO MORE TYPICAL DIURNAL DEVELOPMENT.

HEADING INTO THE WEEKEND...AN AMPLIFYING RIDGE OVER THE CENTRAL
CONUS IS EXPECTED TO DROP RAIN CHANCES BACK TO NEAR OR BELOW
NORMAL...WITH MORE TYPICAL SUMMER TIME CHANCES RETURNING EARLY
NEXT WEEK AS THE RIDGE BREAKS DOWN.

13

MARINE...
THE BERMUDA HIGH PRESSURE SYSTEM WILL BUILD WESTWARD INTO THE
CENTRAL GULF OF MEXICO OVER THE NEXT FEW DAYS. A GREAT PLAINS
COLD FRONT WILL TRAVEL SOUTH AND EAST INTO NORTHERN LOUISIANA
TODAY...COMING TO A HALT ACROSS CENTRAL LOUISIANA ON WEDNESDAY.
SCATTERED PREFRONTAL SHOWERS AND THUNDERSTORMS ARE POSSIBLE OVER
THE COASTAL WATERS.

13

&&

.PRELIMINARY POINT TEMPS/POPS...
KLCH  90  75  90  75 /  60  20  30  20
KBPT  91  75  90  74 /  60  20  20  20
KAEX  91  74  91  72 /  60  20  40  20
KLFT  90  75  90  74 /  60  20  40  20

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...NONE.
TX...NONE.
GM...NONE.

&&

Hazardous weather outlook, Jun 12, 7:02 AM CDT, 2 hours 51 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
702 AM CDT TUE JUN 12 2012

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
131100-
VERNON-RAPIDES-AVOYELLES-BEAUREGARD-ALLEN-EVANGELINE-ST. LANDRY-
CALCASIEU-JEFFERSON DAVIS-ACADIA-LAFAYETTE-UPPER ST. MARTIN-
VERMILION-IBERIA-ST. MARY-LOWER ST. MARTIN-WEST CAMERON-
EAST CAMERON-TYLER-HARDIN-JEFFERSON-ORANGE-NORTHERN JASPER-
NORTHERN NEWTON-SOUTHERN JASPER-SOUTHERN NEWTON-
702 AM CDT TUE JUN 12 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
LOUISIANA...SOUTH CENTRAL LOUISIANA...SOUTHWEST LOUISIANA...WEST
CENTRAL LOUISIANA AND SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS THE OUTLOOK
AREA TODAY AND TONIGHT. ISOLATED SEVERE STORMS WILL BE POSSIBLE
THROUGH THE DAY...WITH DAMAGING WINDS AND/OR LARGE HAIL THE PRIMARY
HAZARDS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TO BE POSSIBLE
THROUGH THURSDAY...WITH RAIN CHANCES DECREASING FRIDAY AND OVER
THE WEEKEND AS AN UPPER LEVEL RIDGE BUILDS OVER THE AREA. AT THIS
TIME...THE PROBABILITY OF SEVERE WEATHER WEDNESDAY AND THURSDAY IS
LOW.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION MAY BE REQUIRED TODAY.

GMZ430-432-435-450-452-455-470-472-475-131100-
SABINE LAKE-CALCASIEU LAKE-VERMILION BAY-
COASTAL WATERS FROM CAMERON LA TO HIGH ISLAND TX OUT 20 NM-
COASTAL WATERS FROM INTRACOASTAL CITY TO CAMERON LA OUT 20 NM-
COASTAL WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY
LA OUT 20 NM-
WATERS FROM CAMERON LA TO HIGH ISLAND TX FROM 20 TO 60 NM-
WATERS FROM  INTRACOASTAL CITY TO CAMERON LA FROM 20 TO 60 NM-
WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY LA FROM
20 TO 60 NM-
558 AM CDT TUE JUN 12 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NORTHWEST
GULF OF MEXICO.

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS THE
OUTLOOK AREA TODAY AND TONIGHT. THE OVERALL PROBABILITY OF SEVERE
THUNDERSTORMS IS LOW...THOUGH DAMAGING WINDS AND/OR LARGE HAIL ARE
THE PRIMARY HAZARDS WITH ANY THUNDERSTORMS THAT DO BECOME SEVERE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TO BE POSSIBLE
THROUGH THURSDAY...WITH RAIN CHANCES DECREASING FRIDAY AND OVER
THE WEEKEND AS AN UPPER LEVEL RIDGE BUILDS OVER THE AREA. AT THIS
TIME...THE PROBABILITY OF SEVERE WEATHER WEDNESDAY AND THURSDAY IS
LOW.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT.

13

In the hours before

Special weather statement, Jun 12, 8:25 AM CDT, 1 hour 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
825 AM CDT TUE JUN 12 2012

LAZ027>030-032-TXZ259-260-121500-
NORTHERN JASPER TX-NORTHERN NEWTON TX-RAPIDES LA-EVANGELINE LA-
BEAUREGARD LA-VERNON LA-AVOYELLES LA-
825 AM CDT TUE JUN 12 2012

...SIGNIFICANT WEATHER ADVISORY FOR JASPER AND NEWTON COUNTIES...
SIGNIFICANT WEATHER ADVISORY FOR RAPIDES...EVANGELINE...BEAUREGARD...
VERNON AND AVOYELLES PARISHES UNTIL 1000 AM CDT...

AT 816 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM 10 MILES
NORTH OF EFFIE TO 6 MILES NORTHEAST OF BROOKELAND...MOVING SOUTHEAST
AT 15 MPH.

* THE LINE OF STRONG THUNDERSTORMS WILL BE NEAR...
  TOLEDO BEND DAM BY 830 AM...
  SLAGLE AND KOLIN BY 835 AM...
  SIEPER BY 840 AM...
  OTIS AND CENTERPOINT BY 845 AM...
  LEESVILLE...LACAMP...MAYFLOWER AND JASPER BY 850 AM...

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING...PEA TO
NICKEL SIZE HAIL...AND WIND GUSTS TO NEAR 50 MPH...WHICH COULD DOWN
TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A
SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 PM TUESDAY
AFTERNOON FOR SOUTHWESTERN LOUISIANA AND SOUTHEAST TEXAS.

LAT...LON 3133 9207 3135 9203 3132 9200 3123 9199
      3124 9183 3119 9170 3112 9174 3106 9170
      3079 9399 3109 9411 3117 9358 3128 9354
      3141 9214

Special weather statement, Jun 12, 9:53 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
953 AM CDT TUE JUN 12 2012

LAZ027>033-TXZ259>262-121600-
NORTHERN JASPER TX-NORTHERN NEWTON TX-ST. LANDRY LA-RAPIDES LA-
EVANGELINE LA-BEAUREGARD LA-ALLEN LA-VERNON LA-AVOYELLES LA-
SOUTHERN JASPER TX-SOUTHERN NEWTON TX-
953 AM CDT TUE JUN 12 2012

...SIGNIFICANT WEATHER ADVISORY FOR JASPER AND NEWTON COUNTIES...
SIGNIFICANT WEATHER ADVISORY FOR ST. LANDRY...RAPIDES...EVANGELINE...
BEAUREGARD...ALLEN...VERNON AND AVOYELLES PARISHES UNTIL 1100 AM
CDT...

AT 952 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM MELVILLE
TO PITKIN TO 10 MILES NORTH OF MERRYVILLE TO 8 MILES NORTH OF
JASPER...MOVING SOUTH AT 25 MPH.

* THE LINE OF STRONG THUNDERSTORMS WILL BE NEAR...
  JUNCTION...DE RIDDER AND JAMESTOWN BY 1000 AM...
  PINE PRAIRIE...OAKDALE...ELIZABETH AND BEAVER BY 1005 AM...
  GRAND PRAIRIE...SUGARTOWN AND NEWTON BY 1010 AM...

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING...PEA TO
NICKEL SIZE HAIL...AND WIND GUSTS 40 TO 50 MPH...WHICH COULD DOWN
TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A
SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED.

THESE STORMS COULD PRODUCE RAINFALL AMOUNTS OF ONE TO TWO INCHES IN A
SHORT PERIOD OF TIME...RESULTING IN PONDING OF WATER AROUND LOW LYING
ROADWAYS. REMEMBER...DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED
ROADWAYS. THE DEPTH MAY BE TOO GREAT TO ALLOW A SAFE CROSSING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 PM TUESDAY
AFTERNOON FOR SOUTHWESTERN LOUISIANA AND SOUTHEAST TEXAS.

LAT...LON 3098 9352 3108 9298 3081 9179 3071 9173
      3049 9176 3039 9169 3041 9197 3030 9214
      3048 9225 3049 9277 3044 9278 3040 9327
      3040 9339 3049 9339 3049 9349 3040 9349
      3046 9409 3064 9405 3069 9411 3110 9415

LANDRENEAU

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 8:25 AM CDT	Special Weather Statement	LCH	Avoyelles, Rapides, Vernon	95 min
Jun 12, 10:58 AM CDT	Special Weather Statement	LCH	Acadia, Allen, Beauregard, Calcasieu, Evangeline, Jefferson Davis and 1 more	62 min
Jun 12, 11:55 AM CDT	Special Weather Statement	LCH	Cameron, Iberia, Saint Martin, St. Mary, Vermilion	65 min
Jun 12, 12:03 PM CDT	Special Marine Warning	LCH		117 min
Jun 12, 12:16 PM CDT	Special Marine Warning	LCH		59 min
Jun 12, 12:46 PM CDT	Areal Flood Advisory	LCH	Lafayette	59 min
Jun 12, 11:43 AM CDT	Special Weather Statement	LCH	Jasper, Newton, Tyler	62 min
Jun 12, 12:00 PM CDT	Severe Thunderstorm Warning	LCH	Tyler	60 min
Jun 12, 12:32 PM CDT	Areal Flood Advisory	LCH	Tyler	118 min
Jun 12, 12:40 PM CDT	Severe Thunderstorm Warning	LCH	Tyler	50 min
Jun 12, 1:28 PM CDT	Special Weather Statement	LCH	Hardin	62 min

Nearby

Special Weather Statements in Louisiana, 2012 Special Weather Statements in Texas, 2012 Every special weather statement 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.