Alert archive / Oklahoma / Heat Advisories in 2021
Heat Advisory 21, NWS Norman, OK
NWS Norman, OK issued this heat advisory at Aug 24, 2021, 2:51 PM CDT for 31 counties in Oklahoma. It took effect at Aug 25, 2021, 12:00 PM CDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Aug 24, 2021, 2:51 PM CDT (19:51 UTC)
- In effect from
- Aug 25, 2021, 12:00 PM CDT
- Expired
- Aug 25, 2021, 8:00 PM CDT
- In force
- 8 hr
- Issued by
- NWS Norman, OK
All 31 counties
Alfalfa County, OK, Atoka County, OK, Bryan County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Woods County, OK
The radar
The Norman radar (KTLX), 6 km from the middle of the area, began a volume at 19:52 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 12:00Z, 7.9 hours before the alert went out and 272 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.
- Mixed-layer CAPE
- 392 J/kg
- Mixed-layer CIN
- -300 J/kg
- Mixed-layer LCL
- 1416 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -57 m²/s²
- 0-3 km storm-relative helicity
- -25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
152 WWUS74 KOUN 241951 NPWOUN URGENT - WEATHER MESSAGE National Weather Service Norman OK 251 PM CDT Tue Aug 24 2021 OKZ008-013-020-026-030>032-042-043-047-048-051-052-250800- /O.NEW.KOUN.HT.Y.0021.210825T1700Z-210826T0100Z/ /O.CON.KOUN.HT.Y.0020.000000T0000Z-210825T0100Z/ Kay-Noble-Payne-Lincoln-Pottawatomie-Seminole-Hughes-Pontotoc- Coal-Johnston-Atoka-Marshall-Bryan- Including the cities of Ponca City, Blackwell, Perry, Stillwater, Chandler, Stroud, Prague, Meeker, Davenport, Wellston, Shawnee, Seminole, Wewoka, Holdenville, Wetumka, Ada, Coalgate, Tishomingo, Atoka, Madill, Kingston, and Durant 251 PM CDT Tue Aug 24 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... ...HEAT ADVISORY IN EFFECT FROM NOON TO 8 PM CDT WEDNESDAY... * WHAT...Heat index values up to 106. * WHERE...Portions of central, east central, northern and southeast Oklahoma. * WHEN...Until 8 PM CDT each 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. && $$ OKZ019-025-028-029-039>041-045-046-050-250800- /O.NEW.KOUN.HT.Y.0021.210825T1700Z-210826T0100Z/ Logan-Oklahoma-McClain-Cleveland-Stephens-Garvin-Murray-Jefferson- Carter-Love- Including the cities of Guthrie, Oklahoma City, Purcell, Newcastle, Blanchard, Norman, Moore, Duncan, Pauls Valley, Lindsay, Wynnewood, Sulphur, Davis, Waurika, Ringling, Ryan, Ardmore, Marietta, and Thackerville 251 PM CDT Tue Aug 24 2021 ...HEAT ADVISORY IN EFFECT FROM NOON TO 8 PM CDT WEDNESDAY... * WHAT...Heat index values up to 105 expected. * WHERE...Logan, Oklahoma, McClain, Cleveland, Stephens, Garvin, Murray, Jefferson, Carter and Love Counties. * WHEN...From noon to 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
3 follow-up statements
730 WWUS74 KOUN 250245 NPWOUN URGENT - WEATHER MESSAGE National Weather Service Norman OK 945 PM CDT Tue Aug 24 2021 OKZ008-013-019-020-025-026-028>032-039>043-045>048-050>052-251045- /O.CON.KOUN.HT.Y.0021.210825T1700Z-210826T0100Z/ Kay-Noble-Logan-Payne-Oklahoma-Lincoln-McClain-Cleveland- Pottawatomie-Seminole-Hughes-Stephens-Garvin-Murray-Pontotoc-Coal- Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan- Including the cities of Ponca City, Blackwell, Perry, Guthrie, Stillwater, Oklahoma City, Chandler, Stroud, Prague, Meeker, Davenport, Wellston, Purcell, Newcastle, Blanchard, Norman, Moore, Shawnee, Seminole, Wewoka, Holdenville, Wetumka, Duncan, Pauls Valley, Lindsay, Wynnewood, Sulphur, Davis, Ada, Coalgate, Waurika, Ringling, Ryan, Ardmore, Tishomingo, Atoka, Marietta, Thackerville, Madill, Kingston, and Durant 945 PM CDT Tue Aug 24 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TO 8 PM CDT WEDNESDAY... * WHAT...Heat index values up to 106 expected. * WHERE...Portions of central, east central, northern, southeast and southern Oklahoma. * WHEN...From noon to 8 PM CDT Wednesday. * 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. && $$
275 WWUS74 KOUN 250707 NPWOUN URGENT - WEATHER MESSAGE National Weather Service Norman OK 207 AM CDT Wed Aug 25 2021 OKZ005>007-011-012-018-024-027-251515- /O.EXA.KOUN.HT.Y.0021.210825T1700Z-210826T0100Z/ Woods-Alfalfa-Grant-Major-Garfield-Kingfisher-Canadian-Grady- Including the cities of Alva, Cherokee, Helena, Carmen, Medford, Pond Creek, Lamont, Wakita, Fairview, Enid, Kingfisher, Hennessey, Okarche, Yukon, Concho, El Reno, Mustang, Chickasha, and Tuttle 207 AM CDT Wed Aug 25 2021 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT THIS EVENING... * WHAT...Heat index values up to 110 expected. * WHERE...Portions of central and northern Oklahoma. * WHEN...From noon today to 8 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ OKZ008-013-019-020-025-026-028>032-039>043-045>048-050>052-251515- /O.CON.KOUN.HT.Y.0021.210825T1700Z-210826T0100Z/ Kay-Noble-Logan-Payne-Oklahoma-Lincoln-McClain-Cleveland- Pottawatomie-Seminole-Hughes-Stephens-Garvin-Murray-Pontotoc-Coal- Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan- Including the cities of Ponca City, Blackwell, Perry, Guthrie, Stillwater, Oklahoma City, Chandler, Stroud, Prague, Meeker, Davenport, Wellston, Purcell, Newcastle, Blanchard, Norman, Moore, Shawnee, Seminole, Wewoka, Holdenville, Wetumka, Duncan, Pauls Valley, Lindsay, Wynnewood, Sulphur, Davis, Ada, Coalgate, Waurika, Ringling, Ryan, Ardmore, Tishomingo, Atoka, Marietta, Thackerville, Madill, Kingston, and Durant 207 AM CDT Wed Aug 25 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM CDT THIS EVENING... * WHAT...Heat index values up to 110 expected. * WHERE...Portions of central, east central, northern, southeast and southern Oklahoma. * WHEN...From noon today to 8 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. && $$
648 WWUS74 KOUN 251742 NPWOUN URGENT - WEATHER MESSAGE National Weather Service Norman OK 1242 PM CDT Wed Aug 25 2021 OKZ005>008-011>013-018>020-024>032-039>043-045>048-050>052-260100- /O.CON.KOUN.HT.Y.0021.000000T0000Z-210826T0100Z/ Woods-Alfalfa-Grant-Kay-Major-Garfield-Noble-Kingfisher-Logan- Payne-Canadian-Oklahoma-Lincoln-Grady-McClain-Cleveland- Pottawatomie-Seminole-Hughes-Stephens-Garvin-Murray-Pontotoc-Coal- Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan- Including the cities of Alva, Cherokee, Helena, Carmen, Medford, Pond Creek, Lamont, Wakita, Ponca City, Blackwell, Fairview, Enid, Perry, Kingfisher, Hennessey, Okarche, Guthrie, Stillwater, Yukon, Concho, El Reno, Mustang, Oklahoma City, Chandler, Stroud, Prague, Meeker, Davenport, Wellston, Chickasha, Tuttle, Purcell, Newcastle, Blanchard, Norman, Moore, Shawnee, Seminole, Wewoka, Holdenville, Wetumka, Duncan, Pauls Valley, Lindsay, Wynnewood, Sulphur, Davis, Ada, Coalgate, Waurika, Ringling, Ryan, Ardmore, Tishomingo, Atoka, Marietta, Thackerville, Madill, Kingston, and Durant 1242 PM CDT Wed Aug 25 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * WHAT...Heat index values 105 to 110. * WHERE...Portions of central, east central, northern, southeast and southern Oklahoma. * WHEN...Through 8 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. && $$
Nearby
Heat Advisories in Oklahoma, 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.