Alert archive / Louisiana / Heat Advisories in 2021

Heat Advisory 7, NWS Lake Charles, LA

July 30, 202110 parishes in Louisiana; 4 counties in Texas

NWS Lake Charles, LA issued this heat advisory at Jul 30, 2021, 4:04 PM CDT for 10 parishes in Louisiana; 4 counties in Texas. It took effect at Jul 31, 2021, 10:00 AM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Jul 30, 2021, 4:04 PM CDT (21:04 UTC)
In effect from
Jul 31, 2021, 10:00 AM CDT
Expired
Jul 31, 2021, 7:00 PM CDT
In force
9 hr
Issued by
NWS Lake Charles, LA

Counties Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Lafayette Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Vernon Parish, LA, Hardin County, TX, Jasper County, TX, Newton County, TX, Tyler County, TX

The radar

The Ft Polk radar (KPOE), 58 km from the middle of the area, began a volume at 21:06 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, 9.1 hours before the alert went out and 61 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 2021-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1281 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 2021-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.193958Sfc1 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
1281 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
891 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
-6 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

331 
WWUS74 KLCH 302104
NPWLCH

URGENT - WEATHER MESSAGE
National Weather Service Lake Charles LA
404 PM CDT Fri Jul 30 2021

LAZ028-029-033-310515-
/O.NEW.KLCH.HT.Y.0007.210731T1500Z-210801T0000Z/
/O.CON.KLCH.EH.W.0001.000000T0000Z-210731T0000Z/
Rapides-Avoyelles-St. Landry-
Including the cities of Alexandria, Pineville, Effie, Marksville,
Bunkie, Cottonport, Simmesport, Mansura, Lawtell, Opelousas, 
and Eunice
404 PM CDT Fri Jul 30 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...
...HEAT ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT SATURDAY...

* WHAT...For the Excessive Heat Warning, dangerously hot 
  conditions with heat index values up to 112. For the Heat 
  Advisory, heat index values up to 113 expected.

* WHERE...Rapides, Avoyelles and St. Landry Parishes.

* WHEN...For the Excessive Heat Warning, until 7 PM CDT this 
  evening. For the Heat Advisory, from 10 AM to 7 PM CDT 
  Saturday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

LAZ027-030>032-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
310515-
/O.NEW.KLCH.HT.Y.0007.210731T1500Z-210801T0000Z/
/O.CON.KLCH.HT.Y.0006.000000T0000Z-210731T0000Z/
Vernon-Beauregard-Allen-Evangeline-Calcasieu-Jefferson Davis-
Acadia-Lafayette-Upper St. Martin-Vermilion-Iberia-St. Mary-
Lower St. Martin-West Cameron-East Cameron-Tyler-Hardin-Jefferson-
Orange-Northern Jasper-Northern Newton-Southern Jasper-
Southern Newton-
Including the cities of Fort Polk, Pickering, Leesville, Slagle, 
Bundick Lake, De Ridder, Fields, Oretta, Oakdale, Kinder, 
Ville Platte, Beaver, St. Landry, Mamou, Reddell, Lake Charles, 
Sulphur, Hathaway, Jennings, Topsy, Roanoke, Welsh, Lake Arthur, 
Crowley, Rayne, Branch, Church Point, Richard, Lafayette, 
Breaux Bridge, Cade, St. Martinville, Abbeville, 
Intracoastal City, Meaux, Forked Island, Kaplan, New Iberia, 
Morgan City, Burns Point, Centerville, Franklin, Patterson, 
Berwick, Bayou Vista, Stephensville, Hackberry, Johnson Bayou, 
Grand Lake, Klondike, Cameron, Creole, Grand Chenier, 
Rutherford Beach, Town Bluff, Fred, Hillister, Ivanhoe, Spurger, 
Warren, Woodville, Lumberton, Silsbee, Beaumont, Sabine Pass, 
Sea Rim State Park, Orange, Vidor, Bridge City, Holly Springs, 
Jasper, Kirbyville, Magnolia Springs, Mt. Union, Roganville, 
Burkeville, Farrsville, Jamestown, Newton, Wiergate, Bleakwood, 
Call, Gist, Buna, Evadale, and Deweyville
404 PM CDT Fri Jul 30 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...
...HEAT ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT SATURDAY...

* WHAT...For the first Heat Advisory, heat index values up to 
  109. For the second Heat Advisory, heat index values up to 110 
  expected.

* WHERE...Portions of central, south central, southwest and west 
  central Louisiana and southeast Texas.

* WHEN...For the first Heat Advisory, until 7 PM CDT this 
  evening. For the second Heat Advisory, from 10 AM to 7 PM CDT 
  Saturday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
4 follow-up statements
726 
WWUS74 KLCH 310010
NPWLCH

URGENT - WEATHER MESSAGE
National Weather Service Lake Charles LA
710 PM CDT Fri Jul 30 2021

LAZ028-029-033-311000-
/O.EXP.KLCH.EH.W.0001.000000T0000Z-210731T0000Z/
/O.CON.KLCH.HT.Y.0007.210731T1500Z-210801T0000Z/
Rapides-Avoyelles-St. Landry-
Including the cities of Alexandria, Pineville, Effie, Marksville,
Bunkie, Cottonport, Simmesport, Mansura, Lawtell, Opelousas, 
and Eunice
710 PM CDT Fri Jul 30 2021

...FRIDAY'S EXCESSIVE HEAT WARNING HAS EXPIRED... 
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 7 PM CDT 
SATURDAY...

* WHAT...Heat index values up to 113 expected.

* WHERE...Rapides, Avoyelles and St. Landry Parishes.

* WHEN...From 10 AM to 7 PM CDT Saturday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

LAZ027-030>032-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
311000-
/O.EXP.KLCH.HT.Y.0006.000000T0000Z-210731T0000Z/
/O.CON.KLCH.HT.Y.0007.210731T1500Z-210801T0000Z/
Vernon-Beauregard-Allen-Evangeline-Calcasieu-Jefferson Davis-
Acadia-Lafayette-Upper St. Martin-Vermilion-Iberia-St. Mary-
Lower St. Martin-West Cameron-East Cameron-Tyler-Hardin-Jefferson-
Orange-Northern Jasper-Northern Newton-Southern Jasper-
Southern Newton-
Including the cities of Fort Polk, Pickering, Leesville, Slagle, 
Bundick Lake, De Ridder, Fields, Oretta, Oakdale, Kinder, 
Ville Platte, Beaver, St. Landry, Mamou, Reddell, Lake Charles, 
Sulphur, Hathaway, Jennings, Topsy, Roanoke, Welsh, Lake Arthur, 
Crowley, Rayne, Branch, Church Point, Richard, Lafayette, 
Breaux Bridge, Cade, St. Martinville, Abbeville, 
Intracoastal City, Meaux, Forked Island, Kaplan, New Iberia, 
Morgan City, Burns Point, Centerville, Franklin, Patterson, 
Berwick, Bayou Vista, Stephensville, Hackberry, Johnson Bayou, 
Grand Lake, Klondike, Cameron, Creole, Grand Chenier, 
Rutherford Beach, Town Bluff, Fred, Hillister, Ivanhoe, Spurger, 
Warren, Woodville, Lumberton, Silsbee, Beaumont, Sabine Pass, 
Sea Rim State Park, Orange, Vidor, Bridge City, Holly Springs, 
Jasper, Kirbyville, Magnolia Springs, Mt. Union, Roganville, 
Burkeville, Farrsville, Jamestown, Newton, Wiergate, Bleakwood, 
Call, Gist, Buna, Evadale, and Deweyville
710 PM CDT Fri Jul 30 2021

...FRIDAY'S HEAT ADVISORY HAS EXPIRED... 
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 7 PM CDT 
SATURDAY...

* WHAT...Heat index values up to 110 expected.

* WHERE...Portions of central, south central, southwest and west 
  central Louisiana and southeast Texas.

* WHEN...From 10 AM to 7 PM CDT Saturday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

25
266 
WWUS74 KLCH 310835
NPWLCH

URGENT - WEATHER MESSAGE
National Weather Service Lake Charles LA
335 AM CDT Sat Jul 31 2021

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
311630-
/O.CON.KLCH.HT.Y.0007.210731T1500Z-210801T0000Z/
Vernon-Rapides-Avoyelles-Beauregard-Allen-Evangeline-St. Landry-
Calcasieu-Jefferson Davis-Acadia-Lafayette-Upper St. Martin-
Vermilion-Iberia-St. Mary-Lower St. Martin-West Cameron-
East Cameron-Tyler-Hardin-Jefferson-Orange-Northern Jasper-
Northern Newton-Southern Jasper-Southern Newton-
Including the cities of Fort Polk, Pickering, Leesville, Slagle, 
Alexandria, Pineville, Effie, Marksville, Bunkie, Cottonport, 
Simmesport, Mansura, Bundick Lake, De Ridder, Fields, Oretta, 
Oakdale, Kinder, Ville Platte, Beaver, St. Landry, Mamou, 
Reddell, Lawtell, Opelousas, Eunice, Lake Charles, Sulphur, 
Hathaway, Jennings, Topsy, Roanoke, Welsh, Lake Arthur, Crowley, 
Rayne, Branch, Church Point, Richard, Lafayette, Breaux Bridge, 
Cade, St. Martinville, Abbeville, Intracoastal City, Meaux, 
Forked Island, Kaplan, New Iberia, Morgan City, Burns Point, 
Centerville, Franklin, Patterson, Berwick, Bayou Vista, 
Stephensville, Hackberry, Johnson Bayou, Grand Lake, Klondike, 
Cameron, Creole, Grand Chenier, Rutherford Beach, Town Bluff, 
Fred, Hillister, Ivanhoe, Spurger, Warren, Woodville, Lumberton, 
Silsbee, Beaumont, Sabine Pass, Sea Rim State Park, Orange, 
Vidor, Bridge City, Holly Springs, Jasper, Kirbyville, 
Magnolia Springs, Mt. Union, Roganville, Burkeville, Farrsville, 
Jamestown, Newton, Wiergate, Bleakwood, Call, Gist, Buna, 
Evadale, and Deweyville
335 AM CDT Sat Jul 31 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
7 PM CDT THIS EVENING...

* WHAT...Heat index values up to 110 expected.

* WHERE...Portions of central, south central, southwest and west 
  central Louisiana and southeast Texas.

* WHEN...From 10 AM this morning to 7 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

13
380 
WWUS74 KLCH 311627
NPWLCH

URGENT - WEATHER MESSAGE
National Weather Service Lake Charles LA
1127 AM CDT Sat Jul 31 2021

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
010000-
/O.CON.KLCH.HT.Y.0007.000000T0000Z-210801T0000Z/
Vernon-Rapides-Avoyelles-Beauregard-Allen-Evangeline-St. Landry-
Calcasieu-Jefferson Davis-Acadia-Lafayette-Upper St. Martin-
Vermilion-Iberia-St. Mary-Lower St. Martin-West Cameron-
East Cameron-Tyler-Hardin-Jefferson-Orange-Northern Jasper-
Northern Newton-Southern Jasper-Southern Newton-
Including the cities of Fort Polk, Pickering, Leesville, Slagle, 
Alexandria, Pineville, Effie, Marksville, Bunkie, Cottonport, 
Simmesport, Mansura, Bundick Lake, De Ridder, Fields, Oretta, 
Oakdale, Kinder, Ville Platte, Beaver, St. Landry, Mamou, 
Reddell, Lawtell, Opelousas, Eunice, Lake Charles, Sulphur, 
Hathaway, Jennings, Topsy, Roanoke, Welsh, Lake Arthur, Crowley, 
Rayne, Branch, Church Point, Richard, Lafayette, Breaux Bridge, 
Cade, St. Martinville, Abbeville, Intracoastal City, Meaux, 
Forked Island, Kaplan, New Iberia, Morgan City, Burns Point, 
Centerville, Franklin, Patterson, Berwick, Bayou Vista, 
Stephensville, Hackberry, Johnson Bayou, Grand Lake, Klondike, 
Cameron, Creole, Grand Chenier, Rutherford Beach, Town Bluff, 
Fred, Hillister, Ivanhoe, Spurger, Warren, Woodville, Lumberton, 
Silsbee, Beaumont, Sabine Pass, Sea Rim State Park, Orange, 
Vidor, Bridge City, Holly Springs, Jasper, Kirbyville, 
Magnolia Springs, Mt. Union, Roganville, Burkeville, Farrsville, 
Jamestown, Newton, Wiergate, Bleakwood, Call, Gist, Buna, 
Evadale, and Deweyville
1127 AM CDT Sat Jul 31 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...

* WHAT...Heat index values up to 110 expected.

* WHERE...Portions of central, south central, southwest and west 
  central Louisiana and southeast Texas.

* WHEN...From 10 AM this morning to 7 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
121 
WWUS74 KLCH 312053
NPWLCH

URGENT - WEATHER MESSAGE
National Weather Service Lake Charles LA
353 PM CDT Sat Jul 31 2021

LAZ028-029-033-010500-
/O.NEW.KLCH.HT.Y.0008.210801T1600Z-210802T0000Z/
/O.CON.KLCH.HT.Y.0007.000000T0000Z-210801T0000Z/
Rapides-Avoyelles-St. Landry-
Including the cities of Alexandria, Pineville, Effie, Marksville,
Bunkie, Cottonport, Simmesport, Mansura, Lawtell, Opelousas, 
and Eunice
353 PM CDT Sat Jul 31 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...
...HEAT ADVISORY IN EFFECT FROM 11 AM TO 7 PM CDT SUNDAY...

* WHAT...For the first Heat Advisory, heat index values up to 
  110. For the second Heat Advisory, heat index values up to 110 
  expected.

* WHERE...Rapides, Avoyelles and St. Landry Parishes.

* WHEN...For the first Heat Advisory, until 7 PM CDT this 
  evening. For the second Heat Advisory, from 11 AM to 7 PM CDT 
  Sunday.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

LAZ027-030>032-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
010000-
/O.CON.KLCH.HT.Y.0007.000000T0000Z-210801T0000Z/
Vernon-Beauregard-Allen-Evangeline-Calcasieu-Jefferson Davis-
Acadia-Lafayette-Upper St. Martin-Vermilion-Iberia-St. Mary-
Lower St. Martin-West Cameron-East Cameron-Tyler-Hardin-Jefferson-
Orange-Northern Jasper-Northern Newton-Southern Jasper-
Southern Newton-
Including the cities of Fort Polk, Pickering, Leesville, Slagle, 
Bundick Lake, De Ridder, Fields, Oretta, Oakdale, Kinder, 
Ville Platte, Beaver, St. Landry, Mamou, Reddell, Lake Charles, 
Sulphur, Hathaway, Jennings, Topsy, Roanoke, Welsh, Lake Arthur, 
Crowley, Rayne, Branch, Church Point, Richard, Lafayette, 
Breaux Bridge, Cade, St. Martinville, Abbeville, 
Intracoastal City, Meaux, Forked Island, Kaplan, New Iberia, 
Morgan City, Burns Point, Centerville, Franklin, Patterson, 
Berwick, Bayou Vista, Stephensville, Hackberry, Johnson Bayou, 
Grand Lake, Klondike, Cameron, Creole, Grand Chenier, 
Rutherford Beach, Town Bluff, Fred, Hillister, Ivanhoe, Spurger, 
Warren, Woodville, Lumberton, Silsbee, Beaumont, Sabine Pass, 
Sea Rim State Park, Orange, Vidor, Bridge City, Holly Springs, 
Jasper, Kirbyville, Magnolia Springs, Mt. Union, Roganville, 
Burkeville, Farrsville, Jamestown, Newton, Wiergate, Bleakwood, 
Call, Gist, Buna, Evadale, and Deweyville
353 PM CDT Sat Jul 31 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...

* WHAT...Heat index values up to 110 expected.

* WHERE...Portions of central, south central, southwest and west 
  central Louisiana and southeast Texas.

* WHEN...From 10 AM this morning to 7 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

What forecasters said that day

The local office's own words before this heat advisory 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 heat advisory went out at Jul 30, 12:47 PM CDT, 3 hours 17 minutes earlier.

Area forecast discussion, Jul 30, 12:47 PM CDT, 3 hours 17 minutes before
Area Forecast Discussion
National Weather Service Lake Charles LA
1247 PM CDT Fri Jul 30 2021

.DISCUSSION...
30JULY2021 18Z TAFs

&&

.AVIATION...
Little to no activity on radar currently. Some afternoon tstorms
could popup within the next few hours at some of the southern
terminals, but only enough to carry VCTS. Otherwise we can expect
VFR conditions to prevail with light winds and few to sct lower
decks.
87 and 11

&&

.PREV DISCUSSION... /issued 1005 AM CDT Fri Jul 30 2021/

UPDATE...
There was no update performed to the inherited grid package. A few
showers remain over the coastal waters, however they have tapered
off in the last few hours. We are already saw heat indices in the
100s as of 9AM CDT. A few sites in CenLA, Alexandria Esler Field
for one, is at 102 now.

87 and 11

PREV DISCUSSION... /issued 620 AM CDT Fri Jul 30 2021/

DISCUSSION...

For 07/30/2021 12Z TAF Issuance.

AVIATION...

A typical summer morning with some patchy mist and associated VIS
reductions along with light and variable to calm winds. Winds
slowly gain a more southerly component by the afternoon, and a few
isolated thunderstorms are possible at the southern terminals.
Other than this mornings mist and any afternoon storms, conditions
expected to prevail VFR. Any convection should begin to wane by
the evening, giving way to another typical summer night... That
is, light and variable winds becoming calm, with the potential for
some patchy mist/fog after midnight. At this time, not enough
confidence/coverage to include VIS reductions in the TAFs.

50

PREV DISCUSSION... /issued 431 AM CDT Fri Jul 30 2021/

DISCUSSION...

SHORT TERM [Today through Sunday Night]...

Another night similar to the last several with some nocturnal
showers and thunderstorms noted over the Gulf of Mexico, and
observations indicating patchy fog/mist in portions of the inland
area. Given the calm conditions, could see this expand a bit
prior to sunrise. Guidance a little more bullish in this regard as
well, mostly north of the I-10 corridor. Still, expect any extra
development to remain patchy in nature and not overly dense.

For today, the primary forecast element continues to be a broad
upper level high centered in the central Plains, the influence of
which will definitely be felt locally. To that end, today looks to
have the potential to be the hottest day thus far of 2021... Or, at
least when taking dew points into consideration, it'll feel like the
hottest so far. For portions of central Louisiana this afternoon,
forecast heat index values are in the 110-115 range for a number of
hours, where elsewhere heat index values up to 110 are still
expected. Given the possibility of the heat index exceeding 113
degrees, the Heat Advisory in Rapides/Avoyelles/St. Landry Parish
was upgraded to an Excessive Heat Warning. For the remainder of the
area, a Heat Advisory remains in effect this afternoon. Still a
couple uncertainties to the forecast though. For one, mixing in
spots will knock the dew point down a bit, which will have the
potential to prevent heat indices from climbing accordingly. Second
is the potential for afternoon convection. Like the last couple of
days, dry air looks to wrap around the upper high, and forecast
soundings show a fairly notable layer of dry air above 700mb, and
especially above 500mb. This should help limit convection, and CAM
guidance accordingly shows very little activity outside of maybe the
near-coastal seabreeze. In any case, despite the exact numbers, it
WILL be hot areawide today, and as always you should take heat
related precautions. Stay hydrated, take frequent breaks if
possible, and find some means to cool off especially if spending
much time outdoors.

On Saturday, the upper high remains largely in tact, though it
begins to feel the effects of amplification into greater troughing
digging into the eastern CONUS. Locally, the forecast temps/dew
points come in similar to today, and a Heat Advisory will likely be
necessitated. PoPs however do come in a bit higher due to an
inverted trough/wave feature sliding westward along the Gulf coast.
GFS still comes in a bit stronger with the feature than the ECMWF,
but in any case, a better signal for a bit more convection is
evident which leads to at least a chance of tackling some of the
afternoon heat.

Sunday, the east CONUS trough continues to amplify and dig south
with increasing height falls, while the upper high gets shunted back
towards the intermountain west. Light southwest flow around a
surface ridge in the northeast Gulf of Mexico keeps moisture locked
in place over the region, and in combination with the increased
troughing, expecting at least a little more scattered
shower/thunderstorm activity. Aside from any rain or cloud related
relief though, still looks like at least one more hot afternoon on
Sunday.

50

LONG TERM [Monday through Thursday]...

Monday will start out generally as a continuation of the weekend,
with warm an muggy conditions prevailing amid above normal low
temperatures. W/SW flow at the SFC will continue through the day
ahead of an approaching unusual August cold front being driven south
by a digging ERN CONUS trof. Scattered to numerous showers and
thunderstorms are expected ahead of and along the front, which is
expected to sink into interior SE TX and Central LA MON afternoon or
evening. Afternoon temperatures will be moderated closer to seasonal
normals by the increase in cloud cover and convective activity.

The front will continue to slowly ooze through the area MON night
and TUE, reaching the nearshore coastal waters by WED morning. Very
high rain chances are forecast along and south of the boundary
through this time period, with rains easing off north of it thanks
to some relatively drier air filtering in. How far south this dry
wedge reaches is uncertain at this time, with the ECMWF depicting a
stronger/deeper upper trof and thus a greater intrusion of drier
air. Should this solution materialize, current PoPs TUE night
through THU could well be overdone, particularly for the northern
half or so of the area. As for temperatures, readings will be
moderated a little below seasonal normals by both the increase in
clouds/PCPN and the drier and slightly cooler air.

13

MARINE...

Light onshore flow is expected through early next week. Expect
daily chances for scattered showers and thunderstorms, with more
widespread activity expected Sunday/Monday/Tuesday as a frontal
boundary slowly moves south. Locally higher winds and seas, along
with cloud to water lightning can be expected near the storms.

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  98  77  98  78 /  20  10  20   0
LCH  93  78  94  78 /  30  10  40  20
LFT  95  78  95  78 /  30  10  40  20
BPT  93  76  94  76 /  30  10  30  10

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...Excessive Heat Warning until 7 PM CDT this evening for LAZ028-
     029-033.

     Heat Advisory until 7 PM CDT this evening for LAZ027-030>032-
     041>045-052>055-073-074.

TX...Heat Advisory until 7 PM CDT this evening for TXZ180-201-215-216-
     259>262.

GM...None.
&&
Hazardous weather outlook, Jul 30, 4:02 PM CDT, 2 minutes before
Hazardous Weather Outlook
National Weather Service Lake Charles LA
402 PM CDT Fri Jul 30 2021

LAZ027-030>032-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
312115-
Vernon-Beauregard-Allen-Evangeline-Calcasieu-Jefferson Davis-Acadia-
Lafayette-Upper St. Martin-Vermilion-Iberia-St. Mary-
Lower St. Martin-West Cameron-East Cameron-Tyler-Hardin-Jefferson-
Orange-Northern Jasper-Northern Newton-Southern Jasper-
Southern Newton-
402 PM CDT Fri Jul 30 2021

...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING...
...HEAT ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT SATURDAY...

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

.DAY ONE...Tonight.

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

   Heat Advisory.

A Heat Advisory is in effect through the afternoon hours into the
early evening. Heat index values will rise above 100 degrees, and
heat index values of up to 110 degrees are possible. Hot
temperatures and high humidity may cause heat illnesses to occur if
heat related precautions aren't taken.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

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

   Heat Advisory.

Hot and humid conditions are expected Saturday and Sunday with
afternoon heat index values rising above 100, and as high as 110.

Scattered showers and thunderstorms are expected each day, mainly
from early afternoon through early evening. More widespread activity
is expected Sunday onward as a frontal boundary slowly moves
southward. Brief heavy rainfall, gusty winds, and frequent cloud to
ground lightning can be expected with the storms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

LAZ028-029-033-312115-
Rapides-Avoyelles-St. Landry-
402 PM CDT Fri Jul 30 2021

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING...
...HEAT ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT SATURDAY...

This Hazardous Weather Outlook is for central Louisiana.

.DAY ONE...Tonight.

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

   Excessive Heat Warning.

An Excessive Heat Warning is in effect through the afternoon hours
into the early evening for portions of central Louisiana. Heat index
values will rise above 100 degrees, and heat index values as high as
110 to 115 will be possible for a number of hours. Hot temperatures
and high humidity may cause heat illnesses to occur if heat related
precautions aren't taken.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

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

   Heat Advisory.

Hot and humid conditions are expected Saturday and Sunday with
afternoon heat index values rising above 100, and as high as 110.

Scattered showers and thunderstorms are expected each day, mainly
from early afternoon through early evening. More widespread activity
is expected Sunday onward as a frontal boundary slowly moves
southward. Brief heavy rainfall, gusty winds, and frequent cloud to
ground lightning can be expected with the storms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

GMZ430-432-435-450-452-455-470-472-475-312115-
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 from 20 to 60 NM-
Waters from Intracoastal City to Cameron LA from 20 to 60 NM-
Waters from Lower Atchafalaya River to Intracoastal City LA from
20 to 60 NM-
402 PM CDT Fri Jul 30 2021

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

.DAY ONE...Tonight.

A few scattered showers and thunderstorms will be possible. Locally
higher winds and seas along with frequent cloud to water lightning
can be expected with the storms.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

A few scattered showers and thunderstorms will be possible. More
widespread activity is expected Sunday onward as a frontal boundary
slowly moves southward. Locally higher winds and seas along with
frequent cloud to water lightning can be expected with the storms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 3:20 AM CDTExcessive Heat WarningLCHAvoyelles, Rapides, Saint Landry16 hr

Nearby

Heat Advisories in Louisiana, 2021Heat Advisories in Texas, 2021Every heat advisory in 2021

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.