Alert archive / Texas / Special Weather Statements in 2011

Special Weather Statement, NWS Lake Charles, LA

May 21, 2011Tyler County, Texas

NWS Lake Charles, LA issued this special weather statement at May 21, 2011, 4:09 AM CDT for Tyler County, Texas. It was in force for 66 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
May 21, 2011, 4:09 AM CDT (09:09 UTC)
Expired
May 21, 2011, 5:15 AM CDT
In force
66 min
Issued by
NWS Lake Charles, LA

County Tyler County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 9.2 hours before the alert went out and 153 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 00:00Z on 2011-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2774 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 00:00Z on 2011-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2774 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
721 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
113 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.5

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 May 20, 11:49 PM CDT, 4 hours 20 minutes earlier.

Area forecast discussion, May 20, 11:49 PM CDT, 4 hours 20 minutes before
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Hazardous weather outlook, May 20, 4:44 AM CDT, 23 hours 25 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
444 AM CDT FRI MAY 20 2011

GMZ430-432-435-450-452-455-470-472-475-LAZ027>033-041>045-051>055-
TXZ180>182-201-215-216-210945-
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-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-
444 AM CDT FRI MAY 20 2011

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

.DAY ONE...TODAY AND TONIGHT
...SMALL CRAFT ADVISORY UNTIL 7 PM FOR ALL COASTAL WATERS...

...WINDY ADVISORY FOR PARISHES AND COUNTIES IN SOUTHEAST TEXAS AND
SOUTHERN LOUISIANA UNTIL 7 PM...

FLOODING CONTINUES IN THE ATCHAFALAYA BASIN. PLEASE LOOK AT OUR
WEBSITE FOR THE LATEST INFORMATION.

BURN BANS CONTINUE FOR ALL COUNTIES IN SOUTHEAST TEXAS AND CAMERON
AND JEFFERSON DAVIS PARISHES IN SOUTHWEST LOUISIANA.

DROUGHT CONDITIONS CONTINUE ACROSS A LARGE SWATH OF SOUTHEAST
TEXAS AND SOUTHERN LOUSIANA. BRISK WINDS WILL BE FROM THE
SOUTHEAST AROUND 15 TO 20 MPH AND GUSTY. THE FIRE RISK REMAINS
ELEVATED TODAY AS STRONG WINDS AND DRY GROUND PERSIST.

A CHANCE OF SHOWERS AND THUNDERSTORMS LATE THIS AFTERNOON INTO
THIS EVENING AND THROUGH THE OVERNIGHT HOURS. THIS LATEST CHANCE
FOR RAIN WILL BRING GENERALLY LESS THAN .10 OF AN INCH TO ANY ONE
LOCATION...AND THEREFORE WILL NOT AFFECT DROUGHT CONDITIONS.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

FLOODING WILL CONTINUE IN THE ATCHAFALAYA BASIN. PLEASE LOOK AT
OUR WEBSITE FOR THE LATEST INFORMATION.

BURN BANS CONTINUE FOR ALL COUNTIES IN SOUTHEAST TEXAS AND CAMERON
AND JEFFERSON DAVIS PARISHES IN SOUTHWEST LOUISIANA.

AFTERNOON TEMPERATURES WILL RANGE FROM THE MID 80S TO NEAR 90 INTO
THE WEEKEND ON SOUTHEAST WINDS. THERE IS A SLIGHT CHANCE FOR SHOWERS
OVER THE LAKES REGION IN SOUTHEAST TEXAS AND CENTRAL LOUISIANA
LATE THURSDAY INTO FRIDAY. THE ELEVATED FIRE THREAT WILL CONTINUE
INTO NEXT WEEK.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Special weather statement, May 21, 1:59 AM CDT, 2 hours 10 minutes before
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Special weather statement, May 21, 4:09 AM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 7:09 PM CDTSmall Craft AdvisoryLCH15 hr
May 21, 1:54 AM CDTAreal Flood AdvisoryLCHTyler111 min
May 21, 5:01 AM CDTAreal Flood AdvisoryLCHTyler119 min

Nearby

Special Weather Statements in Texas, 2011Every 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.