Alert archive / Texas / Heat Advisories in 2021

Heat Advisory 7, NWS Fort Worth, TX

July 30, 202120 counties in Texas

NWS Fort Worth, TX issued this heat advisory at Jul 30, 2021, 4:22 AM CDT for 20 counties in Texas. It took effect at Jul 31, 2021, 12:00 PM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Jul 30, 2021, 4:22 AM CDT (09:22 UTC)
In effect from
Jul 31, 2021, 12:00 PM CDT
Expired
Jul 31, 2021, 7:00 PM CDT
In force
7 hr
Issued by
NWS Fort Worth, TX

Counties Bell County, TX, Bosque County, TX, Falls County, TX, Freestone County, TX, Hill County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Leon County, TX, Limestone County, TX, McLennan County, TX, Milam County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Robertson County, TX, Somervell County, TX, Stephens County, TX, Wise County, TX, Young County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 50 km from the middle of the area, began a volume at 09:24 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

Fort Worth, TX (KFWD), launched 00:00Z, 9.4 hours before the alert went out and 79 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, Fort Worth, TX at 00:00Z on 2021-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1363 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, Fort Worth, TX at 00:00Z on 2021-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
1363 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
1966 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
13 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

464 
WWUS74 KFWD 300922
NPWFWD

URGENT - WEATHER MESSAGE
National Weather Service Fort Worth TX
422 AM CDT Fri Jul 30 2021

TXZ091-100>102-115>117-131>133-144-145-147-158>162-174-175-301830-
/O.NEW.KFWD.HT.Y.0007.210731T1700Z-210801T0000Z/
Montague-Young-Jack-Wise-Stephens-Palo Pinto-Parker-Hood-
Somervell-Johnson-Bosque-Hill-Freestone-Bell-McLennan-Falls-
Limestone-Leon-Milam-Robertson-
Including the cities of Bowie, Nocona, Graham, Olney, Jacksboro, 
Decatur, Bridgeport, Breckenridge, Mineral Wells, Weatherford, 
Briar, Granbury, Oak Trail Shores, Glen Rose, Cleburne, Burleson,
Clifton, Meridian, Valley Mills, Hillsboro, Teague, Fairfield, 
Wortham, Killeen, Temple, Fort Hood, Waco, Marlin, Mexia, 
Groesbeck, Buffalo, Centerville, Jewett, Normangee, Oakwood, 
Cameron, Rockdale, Hearne, Franklin, and Calvert
422 AM CDT Fri Jul 30 2021

...HEAT ADVISORY IN EFFECT FROM NOON TO 7 PM CDT SATURDAY...

* WHAT...Heat index values in excess of 105.

* WHERE...Much of North and Central Texas.

* WHEN...From noon to 7 PM CDT Saturday.

* IMPACTS...Hot temperatures and high humidity will increase the 
  risk for heat-related illnesses to occur, particularly for 
  those working or participating in outdoor activities.

* ADDITIONAL DETAILS...Light winds will intensify the impacts of
  the heat and humidity.

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.

&&

$$

TXZ092>095-103>107-118>123-134-135-146-148-301830-
/O.EXT.KFWD.HT.Y.0006.210730T1700Z-210801T0000Z/
Cooke-Grayson-Fannin-Lamar-Denton-Collin-Hunt-Delta-Hopkins-
Tarrant-Dallas-Rockwall-Kaufman-Van Zandt-Rains-Ellis-Henderson-
Navarro-Anderson-
Including the cities of Gainesville, Sherman, Denison, Bonham, 
Paris, Carrollton, Denton, Lewisville, Flower Mound, Plano, 
McKinney, Allen, Frisco, Greenville, Commerce, Cooper, 
Sulphur Springs, Fort Worth, Arlington, Dallas, Rockwall, Heath, 
Terrell, Kaufman, Forney, Canton, Grand Saline, Wills Point, Van,
Edgewood, Emory, East Tawakoni, Point, Waxahachie, Ennis, 
Midlothian, Athens, Gun Barrel City, Corsicana, and Palestine
422 AM CDT Fri Jul 30 2021

...HEAT ADVISORY NOW IN EFFECT FROM NOON TODAY TO 7 PM CDT
SATURDAY...

* WHAT...Heat index values in excess of 105.

* WHERE...Portions of North Central and East Texas.

* WHEN...From noon today to 7 PM CDT Saturday.

* IMPACTS...Hot temperatures and high humidity will increase the 
  risk for heat-related illnesses to occur, particularly for 
  those working or participating in outdoor activities.

* ADDITIONAL DETAILS...Light winds will intensify the impacts of
  the heat and humidity.

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
387 
WWUS74 KFWD 301803
NPWFWD

URGENT - WEATHER MESSAGE
National Weather Service Fort Worth TX
103 PM CDT Fri Jul 30 2021

TXZ092>095-103>107-118>123-134-135-146-148-310215-
/O.CON.KFWD.HT.Y.0006.000000T0000Z-210801T0000Z/
Cooke-Grayson-Fannin-Lamar-Denton-Collin-Hunt-Delta-Hopkins-
Tarrant-Dallas-Rockwall-Kaufman-Van Zandt-Rains-Ellis-Henderson-
Navarro-Anderson-
Including the cities of Gainesville, Sherman, Denison, Bonham, 
Paris, Carrollton, Denton, Lewisville, Flower Mound, Plano, 
McKinney, Allen, Frisco, Greenville, Commerce, Cooper, 
Sulphur Springs, Fort Worth, Arlington, Dallas, Rockwall, Heath, 
Terrell, Kaufman, Forney, Canton, Grand Saline, Wills Point, Van,
Edgewood, Emory, East Tawakoni, Point, Waxahachie, Ennis, 
Midlothian, Athens, Gun Barrel City, Corsicana, and Palestine
103 PM CDT Fri Jul 30 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT SATURDAY...

* WHAT...Heat index values in excess of 105.

* WHERE...Portions of north central and northeast Texas.

* WHEN...Until 7 PM CDT Saturday.

* IMPACTS...Hot temperatures and high humidity will increase the
  risk for heat-related illnesses to occur, particularly for those
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...Light winds will intensify the impacts of
  the heat and humidity.

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.

&&

$$

TXZ091-100>102-115>117-131>133-144-145-147-158>162-174-175-310215-
/O.CON.KFWD.HT.Y.0007.210731T1700Z-210801T0000Z/
Montague-Young-Jack-Wise-Stephens-Palo Pinto-Parker-Hood-
Somervell-Johnson-Bosque-Hill-Freestone-Bell-McLennan-Falls-
Limestone-Leon-Milam-Robertson-
Including the cities of Bowie, Nocona, Graham, Olney, Jacksboro, 
Decatur, Bridgeport, Breckenridge, Mineral Wells, Weatherford, 
Briar, Granbury, Oak Trail Shores, Glen Rose, Cleburne, Burleson,
Clifton, Meridian, Valley Mills, Hillsboro, Teague, Fairfield, 
Wortham, Killeen, Temple, Fort Hood, Waco, Marlin, Mexia, 
Groesbeck, Buffalo, Centerville, Jewett, Normangee, Oakwood, 
Cameron, Rockdale, Hearne, Franklin, and Calvert
103 PM CDT Fri Jul 30 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TO 7 PM CDT
SATURDAY...

* WHAT...Heat index values in excess of 105.

* WHERE...Portions of north central, northeast and south central 
  Texas.

* WHEN...From noon to 7 PM CDT Saturday.

* IMPACTS...Hot temperatures and high humidity will increase the 
  risk for heat-related illnesses to occur, particularly for 
  those working or participating in outdoor activities.

* ADDITIONAL DETAILS...Light winds will intensify the impacts of
  the heat and humidity.

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.

&&

$$
014 
WWUS74 KFWD 310405
NPWFWD

URGENT - WEATHER MESSAGE
National Weather Service Fort Worth TX
1105 PM CDT Fri Jul 30 2021

TXZ092>095-103>107-118>123-134-135-146-148-311600-
/O.CON.KFWD.HT.Y.0006.000000T0000Z-210801T0000Z/
Cooke-Grayson-Fannin-Lamar-Denton-Collin-Hunt-Delta-Hopkins-
Tarrant-Dallas-Rockwall-Kaufman-Van Zandt-Rains-Ellis-Henderson-
Navarro-Anderson-
Including the cities of Gainesville, Sherman, Denison, Bonham, 
Paris, Carrollton, Denton, Lewisville, Flower Mound, Plano, 
McKinney, Allen, Frisco, Greenville, Commerce, Cooper, 
Sulphur Springs, Fort Worth, Arlington, Dallas, Rockwall, Heath, 
Terrell, Kaufman, Forney, Canton, Grand Saline, Wills Point, Van,
Edgewood, Emory, East Tawakoni, Point, Waxahachie, Ennis, 
Midlothian, Athens, Gun Barrel City, Corsicana, and Palestine
1105 PM CDT Fri Jul 30 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT SATURDAY...

* WHAT...Heat index values up to 109.

* WHERE...Portions of north central and northeast Texas.

* WHEN...Until 7 PM CDT Saturday.

* IMPACTS...Hot temperatures and high humidity will increase the 
  risk for heat-related illnesses to occur, 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.

&&

$$

TXZ091-100>102-115>117-131>133-144-145-147-158>162-174-175-311600-
/O.CON.KFWD.HT.Y.0007.210731T1700Z-210801T0000Z/
Montague-Young-Jack-Wise-Stephens-Palo Pinto-Parker-Hood-
Somervell-Johnson-Bosque-Hill-Freestone-Bell-McLennan-Falls-
Limestone-Leon-Milam-Robertson-
Including the cities of Bowie, Nocona, Graham, Olney, Jacksboro, 
Decatur, Bridgeport, Breckenridge, Mineral Wells, Weatherford, 
Briar, Granbury, Oak Trail Shores, Glen Rose, Cleburne, Burleson,
Clifton, Meridian, Valley Mills, Hillsboro, Teague, Fairfield, 
Wortham, Killeen, Temple, Fort Hood, Waco, Marlin, Mexia, 
Groesbeck, Buffalo, Centerville, Jewett, Normangee, Oakwood, 
Cameron, Rockdale, Hearne, Franklin, and Calvert
1105 PM CDT Fri Jul 30 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TO 7 PM CDT
SATURDAY...

* WHAT...Heat index values up to 107 expected.

* WHERE...Portions of north central, northeast and south central 
  Texas.

* WHEN...From noon to 7 PM CDT Saturday.

* IMPACTS...Hot temperatures and high humidity will increase the 
  risk for heat-related illnesses to occur, 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.

&&

$$
519 
WWUS74 KFWD 311532
NPWFWD

URGENT - WEATHER MESSAGE
National Weather Service Fort Worth TX
1032 AM CDT Sat Jul 31 2021

TXZ091-100>102-115>117-131>133-144-145-147-158>162-174-175-010000-
/O.CON.KFWD.HT.Y.0007.210731T1700Z-210801T0000Z/
Montague-Young-Jack-Wise-Stephens-Palo Pinto-Parker-Hood-
Somervell-Johnson-Bosque-Hill-Freestone-Bell-McLennan-Falls-
Limestone-Leon-Milam-Robertson-
Including the cities of Bowie, Nocona, Graham, Olney, Jacksboro, 
Decatur, Bridgeport, Breckenridge, Mineral Wells, Weatherford, 
Briar, Granbury, Oak Trail Shores, Glen Rose, Cleburne, Burleson,
Clifton, Meridian, Valley Mills, Hillsboro, Teague, Fairfield, 
Wortham, Killeen, Temple, Fort Hood, Waco, Marlin, Mexia, 
Groesbeck, Buffalo, Centerville, Jewett, Normangee, Oakwood, 
Cameron, Rockdale, Hearne, Franklin, and Calvert
1032 AM CDT Sat Jul 31 2021

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

* WHAT...Heat index values up to 107 expected.

* WHERE...Portions of north central, northeast and south central 
  Texas.

* WHEN...Until 7 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity will increase the 
  risk for heat-related illnesses to occur, 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.

&&

$$

TXZ092>095-103>107-118>123-134-135-146-148-010000-
/O.CON.KFWD.HT.Y.0006.000000T0000Z-210801T0000Z/
Cooke-Grayson-Fannin-Lamar-Denton-Collin-Hunt-Delta-Hopkins-
Tarrant-Dallas-Rockwall-Kaufman-Van Zandt-Rains-Ellis-Henderson-
Navarro-Anderson-
Including the cities of Gainesville, Sherman, Denison, Bonham, 
Paris, Carrollton, Denton, Lewisville, Flower Mound, Plano, 
McKinney, Allen, Frisco, Greenville, Commerce, Cooper, 
Sulphur Springs, Fort Worth, Arlington, Dallas, Rockwall, Heath, 
Terrell, Kaufman, Forney, Canton, Grand Saline, Wills Point, Van,
Edgewood, Emory, East Tawakoni, Point, Waxahachie, Ennis, 
Midlothian, Athens, Gun Barrel City, Corsicana, and Palestine
1032 AM CDT Sat Jul 31 2021

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

* WHAT...Heat index values up to 109.

* WHERE...Portions of north central and northeast Texas.

* WHEN...Until 7 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity will increase the 
  risk for heat-related illnesses to occur, 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.

&&

$$
464 
WWUS74 KFWD 311752
NPWFWD

URGENT - WEATHER MESSAGE
National Weather Service Fort Worth TX
1252 PM CDT Sat Jul 31 2021

TXZ094-095-104>107-118>123-134-135-146-148-010200-
/O.NEW.KFWD.HT.Y.0008.210801T1700Z-210802T0000Z/
/O.CON.KFWD.HT.Y.0006.000000T0000Z-210801T0000Z/
Fannin-Lamar-Collin-Hunt-Delta-Hopkins-Tarrant-Dallas-Rockwall-
Kaufman-Van Zandt-Rains-Ellis-Henderson-Navarro-Anderson-
Including the cities of Bonham, Paris, Plano, McKinney, Allen, 
Frisco, Greenville, Commerce, Cooper, Sulphur Springs, 
Fort Worth, Arlington, Dallas, Rockwall, Heath, Terrell, Kaufman,
Forney, Canton, Grand Saline, Wills Point, Van, Edgewood, Emory, 
East Tawakoni, Point, Waxahachie, Ennis, Midlothian, Athens, 
Gun Barrel City, Corsicana, and Palestine
1252 PM CDT Sat Jul 31 2021

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

* WHAT...Heat index values up to 109 are expected. 

* WHERE...Portions of north central and northeast Texas.

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

* IMPACTS...Hot temperatures and high humidity will increase the
  risk for heat-related illnesses to occur, 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.

&&

$$

TXZ133-145-147-158>162-174-175-010200-
/O.NEW.KFWD.HT.Y.0008.210801T1700Z-210802T0000Z/
/O.CON.KFWD.HT.Y.0007.000000T0000Z-210801T0000Z/
Johnson-Hill-Freestone-Bell-McLennan-Falls-Limestone-Leon-Milam-
Robertson-
Including the cities of Cleburne, Burleson, Hillsboro, Teague, 
Fairfield, Wortham, Killeen, Temple, Fort Hood, Waco, Marlin, 
Mexia, Groesbeck, Buffalo, Centerville, Jewett, Normangee, 
Oakwood, Cameron, Rockdale, Hearne, Franklin, and Calvert
1252 PM CDT Sat Jul 31 2021

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

* WHAT...Heat index values up to 107 degrees are possible.

* WHERE...Johnson, Hill, Freestone, Bell, McLennan, Falls, 
  Limestone, Leon, Milam and Robertson Counties.

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

* IMPACTS...Hot temperatures and high humidity will increase the
  risk for heat-related illnesses to occur, 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.

&&

$$

TXZ091-100>102-115>117-131-132-144-010000-
/O.CON.KFWD.HT.Y.0007.000000T0000Z-210801T0000Z/
Montague-Young-Jack-Wise-Stephens-Palo Pinto-Parker-Hood-
Somervell-Bosque-
Including the cities of Bowie, Nocona, Graham, Olney, Jacksboro, 
Decatur, Bridgeport, Breckenridge, Mineral Wells, Weatherford, 
Briar, Granbury, Oak Trail Shores, Glen Rose, Clifton, Meridian, 
and Valley Mills
1252 PM CDT Sat Jul 31 2021

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

* WHAT...Heat index values up to 105.

* WHERE...Stephens, Montague, Jack, Young, Wise, Palo Pinto, 
  Parker, Somervell, Hood and Bosque Counties.

* WHEN...Until 7 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity will increase the 
  risk for heat-related illnesses to occur, 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.

&&

$$

TXZ092-093-103-010000-
/O.CON.KFWD.HT.Y.0006.000000T0000Z-210801T0000Z/
Cooke-Grayson-Denton-
Including the cities of Gainesville, Sherman, Denison, 
Carrollton, Denton, Lewisville, and Flower Mound
1252 PM CDT Sat Jul 31 2021

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

* WHAT...Heat index values up to 107.

* WHERE...Grayson, Denton and Cooke Counties.

* WHEN...Until 7 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity will increase the 
  risk for heat-related illnesses to occur, 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.

&&

$$

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 Fort Worth, TX wrote its last area forecast discussion before this heat advisory went out at Jul 30, 4:20 AM CDT, 2 minutes earlier.

Area forecast discussion, Jul 30, 4:20 AM CDT, 2 minutes before
Area Forecast Discussion
National Weather Service Fort Worth TX
420 AM CDT Fri Jul 30 2021

...New Long Term...

.SHORT TERM... /Issued 1235 AM CDT Fri Jul 30 2021/
/Through Tonight/

It'll be another seasonably hot and humid day as we remain
positioned on the southern periphery of an upper ridge. Subsident
air over most of North Texas should allow for mostly sunny skies
aside from a few high clouds passing by within easterly flow
aloft. While the combination of temperatures and dewpoints should
be sufficient to meet Heat Advisory criteria in much of North and
East Texas, a more dense cirrus canopy over parts of Central
Texas may hold afternoon highs a couple of degrees lower which
should hold heat indices below 105. The only adjustment to the
ongoing Heat Advisory was to add Ellis and Navarro counties for
this afternoon.

Otherwise, Central Texas will be the favored location for
diurnally driven convective development once again. This area
should be far enough removed from the upper ridge to allow for
percolating updrafts coinciding with peak heating. 20% PoPs have
been maintained roughly south of Waco's latitude, but coverage is
expected to be lower than yesterday afternoon's activity. Cannot
completely rule out some shower activity farther north towards
I-20, but coverage would be less than 10%.

-Stalley

&&

.LONG TERM... /NEW/
/This Weekend Through Next Week/

A weakening ridge axis will continue approaching from the north on
Saturday. Mid-level heights will not be extraordinary for the end
of July, but high temperatures will still reach or exceed normal
values (particularly along and north of the I-20 corridor where
the subsidence will be maximized). When combined with unseasonably
rich boundary layer moisture, a greater proportion of the region
will meet/exceed heat advisory criteria. As a result, the advisory
will expand at midday Saturday to include all but our
southwesternmost counties. The advisory will likely need to be
extended into Sunday, but with uncertainties about the arrival of
a cold front and any associated precipitation, those details will
be confirmed with a subsequent forecast package.

A pattern shift will reposition the ridge meridianally through the
Rockies and desert states of Mexico. This will introduce northwest
flow into Texas that will persist throughout the upcoming week. A
cold front embedded in the flow will surge into the Southern
Plains on Sunday, likely initiating afternoon thunderstorms. Even
if the front doesn't technically invade North Texas Sunday
afternoon, associated outflow and additional convective initiation
on these boundaries may occur south of the synoptic-scale wind
shift. More widespread showers and storms are expected Sunday
night and Monday as the front dives deep into Texas, bringing an
end to our bout of heat. The Lone Star State will remain
positioned between ridging in the West and troughing in the East,
keeping milder temperatures and rain chances throughout the week.

25

&&

.AVIATION... /Issued 1235 AM CDT Fri Jul 30 2021/
/06z TAFs/

VFR will prevail with passing cirrus along with some diurnal
cumulus around 5-6 kft. South winds will be rather light through
the period around 5-8 kts. There may be some afternoon convective
activity in Central Texas, but the expected isolated coverage does
not currently warrant inclusion of VCSH/VCTS at the Waco TAF site.
Depending on trends, this potential may be introduced later
today.

-Stalley

&&

.PRELIMINARY POINT TEMPS/POPS...
Dallas-Ft. Worth    99  80 100  80 100 /  10   0   5   0  30
Waco                97  77  97  78  98 /  20   0   5   0  20
Paris               97  77  98  78  97 /   5   0   5   0  40
Denton              99  77 100  77  98 /   5   0   5   0  30
McKinney            98  78  98  78  97 /   5   0   5   0  30
Dallas              98  82 100  82 100 /  10   0   5   0  30
Terrell             96  77  97  77  97 /  10   0   5   0  20
Corsicana           96  77  97  78  97 /  10   0   5   0  20
Temple              96  74  97  76  98 /  20   5  10   0  20
Mineral Wells       96  74  98  75  97 /  10   0   5   0  30

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
Heat Advisory from noon to 7 PM CDT Saturday for TXZ091-100>102-
115>117-131>133-144-145-147-158>162-174-175.

Heat Advisory from noon today to 7 PM CDT Saturday for
TXZ092>095-103>107-118>123-134-135-146-148.

&&
Hazardous weather outlook, Jul 30, 4:20 AM CDT, 2 minutes before
Hazardous Weather Outlook
National Weather Service Fort Worth TX
420 AM CDT Fri Jul 30 2021

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-311100-
Montague-Cooke-Grayson-Fannin-Lamar-Young-Jack-Wise-Denton-Collin-
Hunt-Delta-Hopkins-Stephens-Palo Pinto-Parker-Tarrant-Dallas-
Rockwall-Kaufman-Van Zandt-Rains-Eastland-Erath-Hood-Somervell-
Johnson-Ellis-Henderson-Comanche-Mills-Hamilton-Bosque-Hill-Navarro-
Freestone-Anderson-Lampasas-Coryell-Bell-McLennan-Falls-Limestone-
Leon-Milam-Robertson-
420 AM CDT Fri Jul 30 2021

This Hazardous Weather Outlook is for North and Central Texas.

.DAY ONE...Today and Tonight.
A few thunderstorms will be possible this afternoon in Central
Texas. Lightning and gusty winds will be the primary hazards.

Afternoon heat index values will reach 105, particularly across North
Central and East Texas.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Heat index values will exceed 105 across much of North and Central
Texas Saturday and Sunday.

Thunderstorm chances will return on Sunday and continue throughout
much of the upcoming week. The most widespread storms are expected
Sunday night into Monday.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 29, 7:38 PM CDTSpecial Weather StatementFWDRobertson37 min
Jul 29, 7:54 PM CDTSevere Thunderstorm WarningFWDLeon, Robertson21 min

Nearby

Heat 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.