Alert archive / Louisiana / Special Weather Statements in 2011

Special Weather Statement, NWS Lake Charles, LA

July 18, 2011Calcasieu Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Jul 18, 2011, 3:49 PM CDT for Calcasieu Parish, Louisiana. It was in force for 56 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: Jul 18, 2011, 3:49 PM CDT (20:49 UTC)
Expired: Jul 18, 2011, 4:45 PM CDT
In force: 56 min
Issued by: NWS Lake Charles, LA

County Calcasieu Parish, LA

The radar

The Lake Charles radar (KLCH), 23 km from the middle of the area, began a volume at 20:48 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, 8.8 hours before the alert went out and 25 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: 2419 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 621 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: -21 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.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

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 Jul 18, 3:03 PM CDT, 46 minutes earlier.

Area forecast discussion, Jul 18, 3:03 PM CDT, 46 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Jul 18, 5:30 AM CDT, 10 hours 19 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
530 AM CDT MON JUL 18 2011

LAZ027>033-041>045-051>055-TXZ180>182-201-215-216-191030-
VERNON-RAPIDES-AVOYELLES-BEAUREGARD-ALLEN-EVANGELINE-ST. LANDRY-
CALCASIEU-JEFFERSON DAVIS-ACADIA-LAFAYETTE-UPPER ST. MARTIN-
CAMERON-VERMILION-IBERIA-ST. MARY-LOWER ST. MARTIN-TYLER-JASPER-
NEWTON-HARDIN-JEFFERSON-ORANGE-
530 AM CDT MON JUL 18 2011

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
THE COMBINATION OF DEEP TROPICAL MOISTURE OVER THE AREA WITH A
DISTURBANCE PASSING EAST TO WEST ALOFT WILL ALLOW SHOWERS AND
THUNDERSTORMS TO DEVELOP EARLY THIS MORNING...BECOMING MORE
NUMEROUS DURING THE AFTERNOON. THE SHOWERS AND THUNDERSTORMS WILL
DIMINISH THIS EVENING WITH THE LOSS OF DAYTIME HEATING.

DUE TO THE HIGH MOISTURE CONTENT AND EXPECTED SLOW MOVEMENT OF THE
STRONGER SHOWERS AND STORMS TODAY...HEAVY RAINFALL WITH AMOUNTS
OF 1 TO 3 INCHES...MAY FALL IN ISOLATED LOCATIONS IN A SHORT
AMOUNT OF TIME. THIS WILL LEAD TO PONDING OF WATER ON ROADWAYS AND
MINOR STREET FLOODING IN LOW LYING URBAN DRAINAGE AREAS.
ALSO...FREQUENT CLOUD TO GROUND LIGHTNING MAY OCCUR WITH THE
STORMS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
SCATTERED SHOWERS AND THUNDERSTORMS WITH LOCALIZED HEAVY RAINFALL
AND FREQUENT LIGHTNING CAN BE EXPECTED AGAIN TUESDAY WITH THE BEST
CHANCES OCCURRING FROM THE LATE MORNING THROUGH THE AFTERNOON
HOURS.

RAIN CHANCES WILL DECREASE FROM WEDNESDAY THROUGH THE WEEKEND.
WITH LOWER RAIN CHANCES...AFTERNOON HIGHS WILL RETURN TO THE
MIDDLE 90S WITH HEAT INDEX READINGS OF 100-105 DEGREES FROM MID TO
LATE WEEK.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED.

GMZ430-432-435-450-452-455-470-472-475-191030-
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 EXTENDING FROM 20 NM
TO 60 NM-
WATERS FROM INTRACOASTAL CITY, LA TO CAMERON, LA EXTENDING FROM
20 NM TO 60 NM-
WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY, LA
EXTENDING FROM 20 NM TO 60 NM-
530 AM CDT MON JUL 18 2011

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

.DAY ONE...TODAY AND TONIGHT
SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE...WITH THE BEST
COVERAGE DURING THE MORNING HOURS OFFSHORE AND DURING THE
AFTERNOON HOURS FOR THE LAKES AND BAYS. HEAVY RAINFALL REDUCING
VISIBILITIES BELOW 1 NM AND FREQUENT CLOUD TO WATER LIGHTNING WILL
BE THE MAIN HAZARDS FROM THE STORMS. ALSO...WINDS AND SEAS WILL BE
BRIEFLY HIGHER NEAR STORMS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
A CHANCE OF SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH
TUESDAY. SOME STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL
AND FREQUENT LIGHTNING. RAIN CHANCES WILL DIMINISH FROM WEDNESDAY
THROUGH THE WEEKEND.

OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED.

24

In the hours before

Special weather statement, Jul 18, 9:57 AM CDT, 5 hours 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
957 AM CDT MON JUL 18 2011

LAZ053>055-181600-
LOWER ST. MARTIN LA-ST. MARY LA-IBERIA LA-
957 AM CDT MON JUL 18 2011

...SIGNIFICANT WEATHER ADVISORY FOR ST. MARY...IBERIA AND ST. MARTIN
PARISHES UNTIL 1100 AM CDT...

AT 949 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
CLUSTER OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 8 MILES
WEST OF BELLE RIVER TO AMELIA...MOVING SOUTH AT 10 MPH.

* THE CLUSTER OF STRONG THUNDERSTORMS WILL BE NEAR...
  SORREL...MORGAN CITY AND AMELIA BY 1025 AM...
  CHARENTON BY 1030 AM...
  BERWICK BY 1035 AM...
  PATTERSON MEMORIAL AIRPORT BY 1040 AM...
  BALDWIN BY 1045 AM...
  FRANKLIN AND BAYOU VISTA BY 1050 AM...

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING AND WIND
GUSTS 35 TO 45 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.

LAT...LON 2952 9121 2954 9127 2946 9128 2943 9122
      2946 9128 2942 9127 2942 9134 2947 9131
      2954 9144 2951 9155 2963 9156 2963 9167
      2973 9163 2974 9173 2995 9153 2997 9125
      2986 9119 2981 9109 2960 9107

LANDRENEAU

Special weather statement, Jul 18, 1:42 PM CDT, 2 hours 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
142 PM CDT MON JUL 18 2011

LAZ042>044-051-052-181945-
LAFAYETTE LA-ACADIA LA-JEFFERSON DAVIS LA-VERMILION LA-CAMERON LA-
142 PM CDT MON JUL 18 2011

...SIGNIFICANT WEATHER ADVISORY FOR LAFAYETTE...ACADIA...JEFFERSON
DAVIS...VERMILION AND CAMERON PARISHES UNTIL 245 PM CDT...

AT 135 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM MERMENTAU
TO 7 MILES SOUTH OF CROWLEY...MOVING SOUTH AT 10 MPH.

* THE LINE OF STRONG THUNDERSTORMS WILL BE NEAR...
  MORSE BY 200 PM...
  JENNINGS AND LYONS POINT BY 205 PM...
  MERMENTAU BY 210 PM...
  GUEYDAN BY 230 PM...
  RICEVILLE AND KAPLAN BY 235 PM...
  WRIGHT BY 240 PM...

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING 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.

LAT...LON 3044 9254 3034 9228 2985 9227 3009 9282

LANDRENEAU

Special weather statement, Jul 18, 2:32 PM CDT, 1 hour 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
232 PM CDT MON JUL 18 2011

LAZ033-043>045-052-053-182030-
ST. LANDRY LA-LAFAYETTE LA-ACADIA LA-UPPER ST. MARTIN LA-VERMILION
LA-IBERIA LA-
232 PM CDT MON JUL 18 2011

...SIGNIFICANT WEATHER ADVISORY FOR ST. LANDRY...LAFAYETTE...
ACADIA...VERMILION...IBERIA AND ST. MARTIN PARISHES UNTIL 330 PM
CDT...

AT 227 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
CLUSTERS OF STRONG THUNDERSTORMS NEAR 4 MILES SOUTHEAST OF SWORDS...
2 MILES SOUTHWEST OF MIRE...FROM LAFAYETTE TO DELCAMBRE...MOVING
SOUTHWEST AT 10 MPH.

* THE CLUSTER OF STRONG THUNDERSTORMS WILL BE NEAR...
  DELCAMBRE BY 240 PM...
  BRANCH BY 245 PM...
  SAVOY AND ERATH BY 250 PM...
  DUSON BY 255 PM...
  RICHARD AND RAYNE BY 305 PM...
  RIDGE AND MAURICE BY 320 PM...

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING 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.

LAT...LON 3054 9224 3022 9195 2986 9191 2981 9222
      3034 9255

LANDRENEAU

Special weather statement, Jul 18, 2:42 PM CDT, 1 hour 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
242 PM CDT MON JUL 18 2011

LAZ030-041>043-051-052-182045-
BEAUREGARD LA-ACADIA LA-CALCASIEU LA-JEFFERSON DAVIS LA-VERMILION LA-
CAMERON LA-
242 PM CDT MON JUL 18 2011

...SIGNIFICANT WEATHER ADVISORY FOR BEAUREGARD...ACADIA...
CALCASIEU...JEFFERSON DAVIS...VERMILION AND CAMERON PARISHES UNTIL
345 PM CDT...

AT 241 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM SINGER TO
7 MILES NORTHWEST OF MOSS BLUFF TO IOWA TO LAKE ARTHUR...MOVING
SOUTHWEST AT 15 MPH.

* THE LINE OF STRONG THUNDERSTORMS WILL BE NEAR...
  IOWA...LEBLEU SETTLEMENT AND LAKE ARTHUR BY 250 PM...
  MOSS BLUFF BY 255 PM...
  ORETTA AND THORNWELL BY 300 PM...
  BUHLER BY 310 PM...
  LOWRY AND HAYES BY 315 PM...
  WESTLAKE BY 320 PM...

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING AND WIND
GUSTS 35 TO 45 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.

LAT...LON 3016 9343 3037 9355 3070 9359 3074 9322
      3050 9313 3043 9313 3012 9256 2981 9275

LANDRENEAU

Special weather statement, Jul 18, 3:49 PM CDT, 0 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 8:36 AM CDT	Special Marine Warning	LCH		84 min
Jul 18, 9:57 AM CDT	Special Weather Statement	LCH	St. Mary	63 min
Jul 18, 10:31 AM CDT	Areal Flood Advisory	LCH	Saint Martin, St. Mary	119 min
Jul 18, 1:42 PM CDT	Special Weather Statement	LCH	Acadia	63 min
Jul 18, 2:32 PM CDT	Special Weather Statement	LCH	Acadia, Lafayette	58 min
Jul 18, 2:42 PM CDT	Special Weather Statement	LCH	Beauregard, Calcasieu	63 min
Jul 18, 3:01 PM CDT	Severe Thunderstorm Warning	LCH	Calcasieu	59 min
Jul 18, 4:45 PM CDT	Special Weather Statement	LCH	Orange	30 min

Nearby

Special Weather Statements in Louisiana, 2011 Every special weather statement in 2011

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.