Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 40, NWS Lake Charles, LA

May 23, 2007Orange County, Texas

NWS Lake Charles, LA issued this severe thunderstorm warning at May 23, 2007, 4:18 PM CDT for Orange County, Texas. It was in force for 27 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 23, 2007, 4:18 PM CDT (21:18 UTC)
Expired: May 23, 2007, 4:45 PM CDT
In force: 27 min
Issued by: NWS Lake Charles, LA
Area: Counties, with a storm outline in the text

County Orange County, TX

The radar

The Lake Charles radar (KLCH), 66 km from the middle of the area, began a volume at 21:20 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.3 hours before the alert went out and 68 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: 1550 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 618 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KLCH 232118
SVRLCH
TXC361-232145-
/O.NEW.KLCH.SV.W.0040.070523T2118Z-070523T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
418 PM CDT WED MAY 23 2007

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ORANGE COUNTY IN SOUTHEAST TEXAS...
  THIS INCLUDES THE CITIES OF...WEST ORANGE...VIDOR...ORANGE...BRIDGE
  CITY...

* UNTIL 445 PM CDT

* AT 410 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND     
  DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR    
  WEST ORANGE...AND MOVING NORTHWEST AT 5 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BRIDGE CITY BY 435 PM CDT...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 3000 9391 2999 9384 3000 9379 3004 9374
      3011 9372 3015 9370 3018 9371 3019 9409
      3014 9411 3012 9407 3009 9409 3007 9406

$$

K. KUYPER

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at May 23, 3:04 PM CDT, 1 hour 14 minutes earlier.

Area forecast discussion, May 23, 3:04 PM CDT, 1 hour 14 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
304 PM CDT WED MAY 23 2007

.SYNOPSIS...
A VIRGINIA ANTICYCLONE WILL RIDGE SOUTHWEST TO ACROSS LOUISIANA.
THE AVERAGE POSITION OF ITS ASSOCIATED INSTABILITY AXIS (THE OUTER
PERIPHERY OF THIS ANTICYCLONE) WILL EXTEND THROUGH WEST CENTRAL
LOUISIANA SOUTHWARD INTO THE GULF OF MEXICO.

FURTHER-UP, A MIDTROPOSPHERIC INVERTED TROUGH WILL EXTEND FROM EAST
CENTRAL LOUISIANA TO THE MOUTH OF THE MISSISSIPPI RIVER. THIS SYSTEM
WILL DRIFT WEST AND SOUTH AND SLOWLY WEAKEN.

&&

.DISCUSSION...
FOR TONIGHT, THE RAINS WILL BE COMING TO AN END. THE OVERNIGHT
TEMPERATURES AND HUMIDITIES WILL BE RUNNING SLIGHTLY ABOVE NORMAL.
PATCHY RADIATION-EVAPORATION FOG IS POSSIBLE DURING THE OVERNIGHT
HOURS ESPECIALLY OVER SATURATED GROUND.

FOR TOMORROW, THE CONVECTIVE RAINS ARE EXPECTED TO BE LESS VIGOROUS,
AS MORE STABLE AIR RIDES IN ON EASTERLY WINDS. THE MOST ACTIVE
WEATHER WILL BE ACROSS SOUTHEAST TEXAS AND SOUTHWEST LOUISIANA,
ESPECIALLY NEAR THE INSTABILITY AXIS. THE AFTERNOON TEMPERATURES AND
HUMIDITIES WILL BE RUNNING ABOUT SEASONAL.

&&

.AVIATION...
GULF STRATUS AND PATCHY FOG ARE POSSIBLE DURING THE OVERNIGHT HOURS.
SHOWERS AND THUNDERSTORMS WILL BE LESS VIGOROUS ON THURSDAY.

&&

.MARINE...
THE ACTUAL TIDES ARE EXPECTED TO RUN AT OR ABOUT 1/2 FOOT ABOVE THE
PREDICTED TIDES FOR THE NEXT FEW DAYS.

&&

.PRELIMINARY POINT TEMPS/POPS...
KLCH  70  83  68  83 /  20  50  20  20
KBPT  72  83  70  82 /  20  50  20  20
KAEX  66  84  64  84 /  10  30  20  20
KLFT  68  83  67  84 /  10  40  20  20

&&

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

Hazardous weather outlook, May 23, 5:50 AM CDT, 10 hours 28 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
550 AM CDT WED MAY 23 2007

GMZ450-452-455-470-472-475-LAZ027>033-041>045-051>055-TXZ180>182-
201-215-216-241100-
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-
550 AM CDT WED MAY 23 2007

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

SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS THE
AREA TODAY. SOME STORMS MAY PRODUCE FREQUENT CLOUD TO GROUND
LIGHTNING AND LOCALLY HEAVY RAINFALL...BUT NO ORGANIZED SEVERE
WEATHER IS ANTICIPATED.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

ABOVE NORMAL THUNDERSTORM CHANCES WILL CONTINUE ON THURSDAY...BEFORE
DRIER AIR BEGINS TO FILTER INTO THE REGION ON FRIDAY AND LINGER
INTO THE WEEKEND.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION IS NOT ANTICIPATED.

13

In the hours before

Local storm report, May 23, 10:48 AM CDT, 5 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1048 AM CDT WED MAY 23 2007

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

1030 AM     DOWNBURST        CATAHOULA               30.21N 91.71W
05/23/2007                   ST. MARTIN         LA   BROADCAST MEDIA

            ROOF DAMAGE TO A HOME AND A MOBILE HOME BLOWN OVER DUE TO
            THUNDERSTORM DOWNBURST WIND. REPORTED BY KLFY TV-10.

&&

JS

Local storm report, May 23, 11:26 AM CDT, 4 hours 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1126 AM CDT WED MAY 23 2007

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

1122 AM     HAIL             1 E ST. MARTINVILLE     30.12N 91.81W
05/23/2007  M1.00 INCH       ST. MARTIN         LA   PUBLIC

&&

MOGGED

Local storm report, May 23, 11:36 AM CDT, 4 hours 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1136 AM CDT WED MAY 23 2007

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

1100 AM     MARINE TSTM WIND 27 SW BURNS POINT       29.33N 91.88W
05/23/2007  M40 MPH          GMZ455             LA   PUBLIC

            OCCURRED ON PLATFORM IN SOUTH MARSH ISLAND BLOCK 236.
            RELAYED BY PLATFORM IN SOUTH MARSH ISLAND BLOCK 239

&&

MOGGED

Local storm report, May 23, 12:20 PM CDT, 3 hours 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1220 PM CDT WED MAY 23 2007

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

1219 PM     HAIL             KAPLAN                  30.00N 92.28W
05/23/2007  M0.88 INCH       VERMILION          LA   LAW ENFORCEMENT

&&

MOGGED

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 4:49 PM CDT	Severe Thunderstorm Warning	LCH	Jefferson, Orange	56 min

Nearby

Severe Thunderstorm Warnings in Texas, 2007 Every severe thunderstorm warning in 2007

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.