Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 75, NWS Lake Charles, LA

July 28, 2012Jefferson County, Orange County, Texas; Calcasieu Parish, Cameron Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Jul 28, 2012, 5:52 PM CDT for Jefferson County, Orange County, Texas; Calcasieu Parish, Cameron Parish, Louisiana. It was in force for 53 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 28, 2012, 5:52 PM CDT (22:52 UTC)
Expired
Jul 28, 2012, 6:45 PM CDT
In force
53 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon

Counties Calcasieu Parish, LA, Cameron Parish, LA, Jefferson County, TX, Orange County, TX

The radar

The Lake Charles radar (KLCH), 64 km from the middle of the area, began a volume at 22:53 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.

What was reported inside it

TimeReportWhereRemark
Jul 28, 6:02 PM CDTTSTM WND DMGOrange, TXORANGE POLICE DEPARTMENT REPORTED A LARGE TREE LIMB DOWN AT THE INTERSECTION OF CIRCLE S ST. AND BLUEBONNET DR. IN THE CITY OF ORANGE.
Jul 28, 6:18 PM CDTTSTM WND DMGOrange, TXORANGE POLICE DEPARTMENT REPORTED A TREE LIMB DOWN IN THE 400 BLOCK OF 10TH ST.
Jul 28, 6:20 PM CDTTSTM WND DMGOrange, TXORANGE POLICE DEPARTMENT REPORTED A TREE DOWN ON S 10TH ST.
Jul 28, 6:36 PM CDTTSTM WND DMGOrange, TXORANGE POLICE DEPARTMENT REPORTED A TREE LIMB DOWN IN THE 2500 BLOCK OF WEST PARK.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.9 hours before the alert went out and 65 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 12:00Z on 2012-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2198 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 12:00Z on 2012-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 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
2198 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
806 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
-3 m²/s²
Significant tornado parameter
0.0
Supercell composite
-1.2

Open this sounding in Storm Lab

The text

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

529 
WUUS54 KLCH 282252
SVRLCH
LAC019-023-TXC245-361-282345-
/O.NEW.KLCH.SV.W.0075.120728T2252Z-120728T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
552 PM CDT SAT JUL 28 2012

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL JEFFERSON COUNTY IN SOUTHEAST TEXAS...
  THIS INCLUDES...PORT NECHES...PORT ARTHUR...NEDERLAND...GROVES...
  ORANGE COUNTY IN SOUTHEAST TEXAS...
  THIS INCLUDES...WEST ORANGE...VIDOR...ORANGE...BRIDGE CITY...
  SOUTHWESTERN CALCASIEU PARISH IN SOUTHWEST LOUISIANA...
  NORTHWESTERN CAMERON PARISH IN SOUTHWEST LOUISIANA...

* UNTIL 645 PM CDT

* AT 551 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH...OVER BRIDGE CITY...MOVING SOUTHWEST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GROVES AND PORT NECHES BY 620 PM CDT...
  PORT ARTHUR AND NEDERLAND BY 630 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND HEAVY RAIN. STAY INDOORS...
AWAY FROM WINDOWS.

&&

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE AT
337-477-5285 EXTENSION 1.

LAT...LON 2983 9400 3021 9401 3021 9363 2983 9361
      2983 9380 2995 9376 2998 9378 2998 9382
      2988 9392 2984 9394
TIME...MOT...LOC 2251Z 058DEG 12KT 2999 9383

$$

K. KUYPER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 5:31 PM CDTSpecial Weather StatementLCHOrange59 min
Jul 28, 6:41 PM CDTSpecial Weather StatementLCHJefferson64 min
Jul 28, 3:26 PM CDTSpecial Weather StatementLCHSaint Martin34 min
Jul 28, 3:30 PM CDTSpecial Weather StatementLCHJefferson Davis45 min
Jul 28, 4:05 PM CDTSpecial Weather StatementLCHCalcasieu40 min
Jul 28, 4:11 PM CDTSpecial Weather StatementLCHVermilion49 min
Jul 28, 4:14 PM CDTSpecial Weather StatementLCHVermilion61 min
Jul 28, 4:26 PM CDTSpecial Marine WarningLCH64 min
Jul 28, 4:38 PM CDTSpecial Weather StatementLCHCameron67 min
Jul 28, 4:47 PM CDTSpecial Marine WarningLCH58 min
Jul 28, 4:55 PM CDTSpecial Weather StatementLCHCalcasieu65 min
Jul 28, 5:35 PM CDTSpecial Marine WarningLCH55 min
Jul 28, 6:48 PM CDTSpecial Weather StatementLCHRapides57 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012Severe Thunderstorm Warnings in Louisiana, 2012Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.