Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 100, NWS Lake Charles, LA

August 26, 20204 parishes in Louisiana; 5 counties in Texas

NWS Lake Charles, LA issued this severe thunderstorm warning at Aug 26, 2020, 12:30 PM CDT for 4 parishes in Louisiana; 5 counties in Texas. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 26, 2020, 12:30 PM CDT (17:30 UTC)
Expired
Aug 26, 2020, 1:30 PM CDT
In force
60 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Jefferson Davis Parish, LA, Hardin County, TX, Jasper County, TX, Jefferson County, TX, Newton County, TX, Orange County, TX

The radar

The Lake Charles radar (KLCH), 47 km from the middle of the area, began a volume at 17:33 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, 5.5 hours before the alert went out and 49 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 2020-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1484 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 2020-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 147 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
1484 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
605 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
160 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.3

Open this sounding in Storm Lab

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 Aug 26, 6:09 AM CDT, 6 hours 21 minutes earlier.

Area forecast discussion, Aug 26, 6:09 AM CDT, 6 hours 21 minutes before
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Hazardous weather outlook, Aug 26, 5:22 AM CDT, 7 hours 8 minutes before
Hazardous Weather Outlook
National Weather Service Lake Charles LA
522 AM CDT Wed Aug 26 2020

LAZ041>043-052-073-074-TXZ215-216-271030-
Calcasieu-Jefferson Davis-Acadia-Vermilion-West Cameron-East Cameron-
Jefferson-Orange-
522 AM CDT Wed Aug 26 2020

...HURRICANE WARNING IN EFFECT...
...STORM SURGE WARNING IN EFFECT...
...FLASH FLOOD WATCH IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH
THURSDAY EVENING...

This Hazardous Weather Outlook is for southwest Louisiana and
southeast Texas.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Storm Surge Warning.
   Hurricane Warning.
   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Storm Surge Warning.
   Hurricane Warning.
   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

LAZ053>055-271030-
Iberia-St. Mary-Lower St. Martin-
522 AM CDT Wed Aug 26 2020

...STORM SURGE WARNING IN EFFECT...
...TROPICAL STORM WARNING IN EFFECT...
...HURRICANE WATCH IN EFFECT...
...FLASH FLOOD WATCH IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH
THURSDAY EVENING...

This Hazardous Weather Outlook is for south central Louisiana.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Storm Surge Warning.
   Hurricane Watch.
   Tropical Storm Warning.
   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Storm Surge Warning.
   Hurricane Watch.
   Tropical Storm Warning.
   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

GMZ430-432-450-452-470-472-271030-
Sabine Lake-Calcasieu Lake-
Coastal waters from Cameron LA to High Island TX out 20 NM-
Coastal waters from Intracoastal City to Cameron 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-
522 AM CDT Wed Aug 26 2020

...HURRICANE WARNING IN EFFECT...

This Hazardous Weather Outlook is for the Gulf of Mexico and the
coastal lakes and bays of the Gulf of Mexico.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Hurricane Warning.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Hurricane Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

LAZ027-028-030>032-TXZ180-201-259>262-271030-
Vernon-Rapides-Beauregard-Allen-Evangeline-Tyler-Hardin-
Northern Jasper-Northern Newton-Southern Jasper-Southern Newton-
522 AM CDT Wed Aug 26 2020

...HURRICANE WARNING IN EFFECT...
...FLASH FLOOD WATCH IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH
THURSDAY EVENING...

This Hazardous Weather Outlook is for central Louisiana, southwest
Louisiana, west central Louisiana and southeast Texas.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Hurricane Warning.
   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Hurricane Warning.
   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

LAZ029-033-044-045-271030-
Avoyelles-St. Landry-Lafayette-Upper St. Martin-
522 AM CDT Wed Aug 26 2020

...TROPICAL STORM WARNING IN EFFECT...
...FLASH FLOOD WATCH IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH
THURSDAY EVENING...

This Hazardous Weather Outlook is for central Louisiana and south
central Louisiana.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tropical Storm Warning.
   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tropical Storm Warning.
   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

GMZ435-455-475-271030-
Vermilion Bay-
Coastal waters from Lower Atchafalaya River to Intracoastal City LA
out 20 NM-
Waters from Lower Atchafalaya River to Intracoastal City LA from
20 to 60 NM-
522 AM CDT Wed Aug 26 2020

...TROPICAL STORM WARNING IN EFFECT...
...HURRICANE WATCH IN EFFECT...

This Hazardous Weather Outlook is for the Gulf of Mexico and the
coastal lakes and bays of the Gulf of Mexico.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Hurricane Watch.
   Tropical Storm Warning.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Hurricane Watch.
   Tropical Storm Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Aug 26, 10:20 AM CDT, 2 hours 10 minutes before
Special Weather Statement
National Weather Service Lake Charles LA
Issued by National Weather Service Brownsville TX
1020 AM CDT Wed Aug 26 2020

LAZ042>045-052>055-073-074-TXZ215-261630-
West Cameron LA-Lower St. Martin LA-Acadia LA-Iberia LA-
Jefferson Davis LA-Lafayette LA-Vermilion LA-Upper St. Martin LA-
St. Mary LA-East Cameron LA-Jefferson TX-
1020 AM CDT Wed Aug 26 2020

...SIGNIFICANT WEATHER ADVISORY FOR LAFAYETTE...CAMERON...IBERIA...
ST. MARY...SOUTHEASTERN JEFFERSON DAVIS...SOUTHERN ACADIA...
SOUTHEASTERN CALCASIEU...VERMILION...ST. MARTIN...SOUTHERN ST. LANDRY
PARISHES IN CENTRAL LOUISIANA AND SOUTHEASTERN JEFFERSON COUNTIES
UNTIL 1130 AM CDT...

At 1019 AM CDT, Doppler radar was tracking strong outer band from
Hurricane Laura along a line extending from 46 miles southeast of
Galveston Pleasure Pier to 36 miles south of Grand Chenier to 14
miles southwest of Cypremort Point to 17 miles south of Amelia.
Movement was north at 45 mph.

Wind gusts of 50 to 55 mph will be possible with these storms.

Locations impacted include...
Lafayette, Port Arthur, New Iberia, Crowley, Morgan City, Abbeville,
Catahoula, Scott, Breaux Bridge and Rayne.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Lake Charles.

&&

LAT...LON 2935 9138 2955 9141 2956 9142 2941 9149
      2942 9149 2964 9157 2951 9190 2941 9185
      2958 9205 2958 9260 2980 9334 2956 9435
      2998 9334 2986 9344 2981 9335 3001 9327
      3037 9206 3029 9161 3004 9123 2963 9108
TIME...MOT...LOC 1519Z 172DEG 38KT 2871 9441 2925 9312 2956 9198 2942
9115

CB
Special weather statement, Aug 26, 11:29 AM CDT, 1 hour 1 minute before
Special Weather Statement
National Weather Service Lake Charles LA
Issued by National Weather Service Brownsville TX
1129 AM CDT Wed Aug 26 2020

LAZ041>044-052>054-073-074-261730-
West Cameron LA-Calcasieu LA-Acadia LA-Iberia LA-Jefferson Davis LA-
Lafayette LA-Vermilion LA-St. Mary LA-East Cameron LA-
1129 AM CDT Wed Aug 26 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN LAFAYETTE...
CAMERON...WESTERN IBERIA...CENTRAL ST. MARY...SOUTHEASTERN JEFFERSON
DAVIS...SOUTHWESTERN ACADIA...SOUTHEASTERN CALCASIEU AND VERMILION
PARISHES UNTIL 1230 PM CDT...

At 1127 AM CDT, Doppler radar was tracking a strong squall line of
tropical showers along a line extending from Grand Chenier to 7
miles south of Wright to NEAR Cypremort Point. Movement was
northwest at 35 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Lafayette, Abbeville, Jennings, Cameron, Kaplan, Welsh, Lake Arthur,
Gueydan, Mermentau and Freshwater City.

LAT...LON 2958 9205 2953 9229 2958 9263 2984 9327
      3004 9328 3005 9329 2987 9335 3001 9365
      3023 9290 3015 9206 2948 9128 2946 9130
      2956 9142 2952 9155 2964 9157 2963 9165
      2949 9177 2951 9190 2943 9183
TIME...MOT...LOC 1627Z 122DEG 29KT 2976 9295 2989 9245 2976 9179

Mejia
Special weather statement, Aug 26, 11:44 AM CDT, 46 minutes before
Special Weather Statement
National Weather Service Lake Charles LA
Issued by National Weather Service Brownsville TX
1144 AM CDT Wed Aug 26 2020

LAZ073-TXZ201-215-216-261-261815-
West Cameron LA-Orange TX-Jefferson TX-Hardin TX-Southern Jasper TX-
1144 AM CDT Wed Aug 26 2020

...A LINE OF TROPICAL SHOWERS WILL AFFECT NORTHWESTERN CAMERON
PARISH... JEFFERSON...SOUTHEASTERN HARDIN...ORANGE AND SOUTH CENTRAL
JASPER COUNTIES UNTIL 115 PM CDT...

At 1141 AM CDT, Doppler radar indicated showers were located along a
line extending from 8 miles southeast of Johnsons Bayou to 28 miles
south of Gilchrist. Movement was northwest at 30 mph.

Wind gusts up to 50 mph are possible with these showers. Tropical
funnels and waterspouts are possible.

Locations impacted include...
Beaumont, Port Arthur, Orange, Nederland, Groves, Port Neches,
Lumberton, Vidor, Bridge City and West Orange.

LAT...LON 2989 9436 2989 9444 3008 9444 3037 9407
      2977 9344 2974 9375 2969 9384 2980 9391
      2985 9379 2997 9376 3000 9379 2998 9383
      2999 9386 2998 9384 2997 9384 2981 9395
      2981 9393 2968 9385 2967 9405 2956 9435
TIME...MOT...LOC 1641Z 135DEG 26KT 2969 9355 2913 9432

Mejia
Special weather statement, Aug 26, 12:14 PM CDT, 16 minutes before
Special Weather Statement
National Weather Service Lake Charles LA
Issued by National Weather Service Brownsville TX
1214 PM CDT Wed Aug 26 2020

LAZ030-041-042-073-074-TXZ201-216-260>262-261845-
West Cameron LA-Calcasieu LA-Jefferson Davis LA-Beauregard LA-
East Cameron LA-Orange TX-Hardin TX-Southern Newton TX-
Northern Newton TX-Southern Jasper TX-
1214 PM CDT Wed Aug 26 2020

...A LINE OF TROPICAL SHOWERS AND THUNDERSTORMS WILL AFFECT NORTHERN
CAMERON...SOUTHERN JEFFERSON DAVIS...SOUTHWESTERN
BEAUREGARD...SOUTHWESTERN ACADIA... CALCASIEU...NORTHWESTERN
VERMILION AND SOUTHWESTERN ALLEN PARISHES... SOUTHWESTERN
NEWTON...EAST CENTRAL HARDIN...ORANGE AND SOUTHEASTERN JASPER
COUNTIES UNTIL 145 PM CDT...

At 1209 PM CDT, Doppler radar indicated thunderstorms along a line
extending from NEAR Thornwell to NEAR Hackberry. Movement was
northwest at 35 mph.

Wind gusts of 50 to 55 mph will be possible with these storms.
Tropical funnels and brief tornadoes are also possible.

Locations impacted include...
Lake Charles, Sulphur, Orange, Lumberton, Vidor, Bridge City,
Cameron, Silsbee, Westlake and West Orange.

LAT...LON 3052 9395 3052 9389 3055 9388 3072 9352
      3047 9313 3042 9313 3042 9307 3013 9262
      3007 9263 3004 9272 3003 9262 3003 9263
      2976 9314 2978 9323 2976 9334 2977 9334
      2979 9332 2980 9333 2976 9335 3035 9432
TIME...MOT...LOC 1709Z 125DEG 31KT 3015 9283 2991 9334

Mejia

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 10:13 AM CDTSpecial Marine WarningLCH2 hr
Aug 26, 10:20 AM CDTSpecial Weather StatementLCHCameron, Iberia, Lafayette, Saint Martin, St. Mary, Vermilion70 min
Aug 26, 11:29 AM CDTSpecial Weather StatementLCHCameron, Iberia, St. Mary, Vermilion61 min
Aug 26, 12:14 PM CDTSpecial Weather StatementLCHCalcasieu, Cameron91 min
Aug 26, 12:46 PM CDTSpecial Weather StatementLCHAcadia, Cameron, Iberia, Jefferson Davis, St. Mary, Vermilion44 min
Aug 26, 1:10 PM CDTTornado WarningLCHAcadia, Cameron, Jefferson Davis, Vermilion20 min
Aug 26, 2:08 PM CDTTornado WarningLCHAcadia22 min
Aug 26, 2:28 PM CDTTornado WarningLCHAcadia, Allen, Evangeline, Jefferson Davis14 min
Aug 26, 3:11 PM CDTTornado WarningLCHAvoyelles, Evangeline, Rapides, Saint Landry19 min
Aug 26, 3:18 PM CDTTornado WarningLCHBeauregard27 min
Aug 26, 3:27 PM CDTTornado WarningLCHAvoyelles, Evangeline, Rapides18 min
Aug 26, 3:37 PM CDTTornado WarningLCHVernon23 min
Aug 26, 4:18 PM CDTSpecial Weather StatementLCHAvoyelles, Rapides, Vernon42 min
Aug 26, 4:50 PM CDTSpecial Marine WarningLCH25 min
Aug 26, 11:44 AM CDTSpecial Weather StatementLCHJefferson, Orange91 min
Aug 26, 1:30 PM CDTSpecial Weather StatementLCHHardin, Orange, Tyler60 min
Aug 26, 2:03 PM CDTTornado WarningLCHHardin, Tyler12 min
Aug 26, 2:15 PM CDTTornado WarningLCHHardin, Tyler30 min
Aug 26, 2:40 PM CDTTornado WarningLCHTyler20 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020Severe Thunderstorm Warnings in Louisiana, 2020Every severe thunderstorm warning in 2020

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.