Alert archive / Mississippi / Heat Advisories in 2021
Heat Advisory 11, NWS Jackson, MS
NWS Jackson, MS issued this heat advisory at Aug 24, 2021, 3:01 PM CDT for 34 counties in Mississippi; 9 parishes in Louisiana; Ashley County, Chicot County, Arkansas. It took effect at Aug 25, 2021, 10:00 AM CDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Aug 24, 2021, 3:01 PM CDT (20:01 UTC)
- In effect from
- Aug 25, 2021, 10:00 AM CDT
- Expired
- Aug 25, 2021, 7:00 PM CDT
- In force
- 9 hr
- Issued by
- NWS Jackson, MS
All 45 counties
Ashley County, AR, Chicot County, AR, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Attala County, MS, Bolivar County, MS, Carroll County, MS, Claiborne County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Montgomery County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 53 km from the middle of the area, began a volume at 20:05 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
Jackson, MS (KJAN), launched 12:00Z, 8.0 hours before the alert went out and 43 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
- 751 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1224 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
107 WWUS74 KJAN 242001 NPWJAN URGENT - WEATHER MESSAGE National Weather Service Jackson MS 301 PM CDT Tue Aug 24 2021 ARZ074-075-LAZ007>009-015-016-023-025-MSZ018-019-025-034-035- 040>042-047-048-053-054-059-061>063-250415- /O.NEW.KJAN.HT.Y.0011.210825T1500Z-210826T0000Z/ /O.CON.KJAN.EH.W.0002.000000T0000Z-210825T0000Z/ Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Tensas-Bolivar-Sunflower-Leflore- Washington-Humphreys-Issaquena-Sharkey-Yazoo-Warren-Hinds- Claiborne-Copiah-Jefferson-Franklin MS-Lincoln-Lawrence- Including the cities of Crossett, North Crossett, Hamburg, West Crossett, Dermott, Lake Village, Eudora, Bastrop, Oak Grove, Epps, Lake Providence, Rayville, Delhi, Tallulah, Winnsboro, Newellton, St. Joseph, Waterproof, Cleveland, Indianola, Ruleville, Greenwood, Greenville, Belzoni, Isola, Mayersville, Rolling Fork, Anguilla, Yazoo City, Vicksburg, Jackson, Port Gibson, Crystal Springs, Hazlehurst, Wesson, Fayette, Bude, Roxie, Meadville, Brookhaven, Monticello, and New Hebron 301 PM CDT Tue Aug 24 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...HEAT ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT WEDNESDAY... * WHAT...For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 115. For the Heat Advisory, heat index values up to 110 expected. * WHERE...Portions of northeast Louisiana, central, north central, northwest, south central, southwest and west central Mississippi and southeast Arkansas. * WHEN...For the Excessive Heat Warning, until 7 PM CDT this evening. For the Heat Advisory, from 10 AM to 7 PM CDT Wednesday. * 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. && $$ LAZ024-026-MSZ060-250415- /O.NEW.KJAN.HT.Y.0011.210825T1500Z-210826T0000Z/ /O.CON.KJAN.EH.W.0003.000000T0000Z-210825T0000Z/ Catahoula-Concordia-Adams- Including the cities of Jonesville, Harrisonburg, Vidalia, Ferriday, West Ferriday, and Natchez 301 PM CDT Tue Aug 24 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...HEAT ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT WEDNESDAY... * WHAT...For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 115. For the Heat Advisory, heat index values up to 110 expected. * WHERE...In Mississippi, Adams County. In Louisiana, Catahoula and Concordia Counties. * WHEN...For the Excessive Heat Warning, until 7 PM CDT this evening. For the Heat Advisory, from 10 AM to 7 PM CDT Wednesday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ MSZ026>028-036-037-043-044-049-050-055-056-064>066-072>074-250415- /O.NEW.KJAN.HT.Y.0011.210825T1500Z-210826T0000Z/ /O.CON.KJAN.HT.Y.0010.000000T0000Z-210825T0000Z/ Grenada-Carroll-Montgomery-Holmes-Attala-Madison MS-Leake-Rankin- Scott-Simpson-Smith-Jefferson Davis-Covington-Jones-Marion-Lamar- Forrest- Including the cities of Grenada, Vaiden, North Carrollton, Carrollton, Winona, Durant, Tchula, Lexington, Pickens, Goodman, Kosciusko, Ridgeland, Madison, Canton, Carthage, Pearl, Brandon, Richland, Forest, Morton, Magee, Mendenhall, Taylorsville, Raleigh, Prentiss, Bassfield, Collins, Mount Olive, Laurel, Columbia, West Hattiesburg, Lumberton, Purvis, and Hattiesburg 301 PM CDT Tue Aug 24 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...HEAT ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT WEDNESDAY... * WHAT...For the Heat Advisory, heat index values up to 110. * WHERE...Portions of central, north central, south central and southeast Mississippi. * WHEN...For the first Heat Advisory, until 7 PM CDT this evening. For the second Heat Advisory, from 10 AM to 7 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. && $$
4 follow-up statements
595 WWUS74 KJAN 250205 NPWJAN URGENT - WEATHER MESSAGE National Weather Service Jackson MS 905 PM CDT Tue Aug 24 2021 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>028-034>037- 040>044-047>050-053>056-059>066-072>074-251015- /O.CON.KJAN.HT.Y.0011.210825T1500Z-210826T0000Z/ Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar- Sunflower-Leflore-Grenada-Carroll-Montgomery-Washington-Humphreys- Holmes-Attala-Issaquena-Sharkey-Yazoo-Madison MS-Leake-Warren- Hinds-Rankin-Scott-Claiborne-Copiah-Simpson-Smith-Jefferson-Adams- Franklin MS-Lincoln-Lawrence-Jefferson Davis-Covington-Jones- Marion-Lamar-Forrest- Including the cities of Crossett, North Crossett, Hamburg, West Crossett, Dermott, Lake Village, Eudora, Bastrop, Oak Grove, Epps, Lake Providence, Rayville, Delhi, Tallulah, Winnsboro, Jonesville, Harrisonburg, Newellton, St. Joseph, Waterproof, Vidalia, Ferriday, West Ferriday, Cleveland, Indianola, Ruleville, Greenwood, Grenada, Vaiden, North Carrollton, Carrollton, Winona, Greenville, Belzoni, Isola, Durant, Tchula, Lexington, Pickens, Goodman, Kosciusko, Mayersville, Rolling Fork, Anguilla, Yazoo City, Ridgeland, Madison, Canton, Carthage, Vicksburg, Jackson, Pearl, Brandon, Richland, Forest, Morton, Port Gibson, Crystal Springs, Hazlehurst, Wesson, Magee, Mendenhall, Taylorsville, Raleigh, Fayette, Natchez, Bude, Roxie, Meadville, Brookhaven, Monticello, New Hebron, Prentiss, Bassfield, Collins, Mount Olive, Laurel, Columbia, West Hattiesburg, Lumberton, Purvis, and Hattiesburg 905 PM CDT Tue Aug 24 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 7 PM CDT WEDNESDAY... * WHAT...Heat index values up to 110 expected. * WHERE...Portions of northeast Louisiana, southeast Arkansas and much of central Mississippi. * WHEN...10 AM to 7 PM CDT Wednesday. * 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. && $$
609 WWUS74 KJAN 250704 AAA NPWJAN URGENT - WEATHER MESSAGE...UPDATED National Weather Service Jackson MS 204 AM CDT Wed Aug 25 2021 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>028-034>037- 040>044-047>050-053>056-059>066-072>074-251515- /O.CON.KJAN.HT.Y.0011.210825T1500Z-210826T0000Z/ Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar- Sunflower-Leflore-Grenada-Carroll-Montgomery-Washington-Humphreys- Holmes-Attala-Issaquena-Sharkey-Yazoo-Madison MS-Leake-Warren- Hinds-Rankin-Scott-Claiborne-Copiah-Simpson-Smith-Jefferson-Adams- Franklin MS-Lincoln-Lawrence-Jefferson Davis-Covington-Jones- Marion-Lamar-Forrest- Including the cities of Crossett, North Crossett, Hamburg, West Crossett, Dermott, Lake Village, Eudora, Bastrop, Oak Grove, Epps, Lake Providence, Rayville, Delhi, Tallulah, Winnsboro, Jonesville, Harrisonburg, Newellton, St. Joseph, Waterproof, Vidalia, Ferriday, West Ferriday, Cleveland, Indianola, Ruleville, Greenwood, Grenada, Vaiden, North Carrollton, Carrollton, Winona, Greenville, Belzoni, Isola, Durant, Tchula, Lexington, Pickens, Goodman, Kosciusko, Mayersville, Rolling Fork, Anguilla, Yazoo City, Ridgeland, Madison, Canton, Carthage, Vicksburg, Jackson, Pearl, Brandon, Richland, Forest, Morton, Port Gibson, Crystal Springs, Hazlehurst, Wesson, Magee, Mendenhall, Taylorsville, Raleigh, Fayette, Natchez, Bude, Roxie, Meadville, Brookhaven, Monticello, New Hebron, Prentiss, Bassfield, Collins, Mount Olive, Laurel, Columbia, West Hattiesburg, Lumberton, Purvis, and Hattiesburg 204 AM CDT Wed Aug 25 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM CDT THIS EVENING... * WHAT...Heat index values up to 110 degrees expected. * WHERE...Portions of northeast Louisiana, southeast Arkansas and much of central Mississippi. * WHEN...10 AM to 7 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat 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. && $$ DC
205 WWUS74 KJAN 251500 NPWJAN URGENT - WEATHER MESSAGE National Weather Service Jackson MS 1000 AM CDT Wed Aug 25 2021 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>028-034>037- 040>044-047>050-053>056-059>066-072>074-252300- /O.CON.KJAN.HT.Y.0011.000000T0000Z-210826T0000Z/ Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar- Sunflower-Leflore-Grenada-Carroll-Montgomery-Washington-Humphreys- Holmes-Attala-Issaquena-Sharkey-Yazoo-Madison MS-Leake-Warren- Hinds-Rankin-Scott-Claiborne-Copiah-Simpson-Smith-Jefferson-Adams- Franklin MS-Lincoln-Lawrence-Jefferson Davis-Covington-Jones- Marion-Lamar-Forrest- Including the cities of Crossett, North Crossett, Hamburg, West Crossett, Dermott, Lake Village, Eudora, Bastrop, Oak Grove, Epps, Lake Providence, Rayville, Delhi, Tallulah, Winnsboro, Jonesville, Harrisonburg, Newellton, St. Joseph, Waterproof, Vidalia, Ferriday, West Ferriday, Cleveland, Indianola, Ruleville, Greenwood, Grenada, Vaiden, North Carrollton, Carrollton, Winona, Greenville, Belzoni, Isola, Durant, Tchula, Lexington, Pickens, Goodman, Kosciusko, Mayersville, Rolling Fork, Anguilla, Yazoo City, Ridgeland, Madison, Canton, Carthage, Vicksburg, Jackson, Pearl, Brandon, Richland, Forest, Morton, Port Gibson, Crystal Springs, Hazlehurst, Wesson, Magee, Mendenhall, Taylorsville, Raleigh, Fayette, Natchez, Bude, Roxie, Meadville, Brookhaven, Monticello, New Hebron, Prentiss, Bassfield, Collins, Mount Olive, Laurel, Columbia, West Hattiesburg, Lumberton, Purvis, and Hattiesburg 1000 AM CDT Wed Aug 25 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Heat index values up to 110 degrees expected. * WHERE...Portions of northeast Louisiana, southeast Arkansas and much of central Mississippi. * WHEN...10 AM to 7 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat 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. && $$ AJ
511 WWUS74 KJAN 252010 NPWJAN URGENT - WEATHER MESSAGE National Weather Service Jackson MS 310 PM CDT Wed Aug 25 2021 ARZ074-075-LAZ007>009-015-016-MSZ018-019-025>027-034>036-040>043- 047-048-260415- /O.NEW.KJAN.HT.Y.0012.210826T1500Z-210827T0000Z/ /O.CON.KJAN.HT.Y.0011.000000T0000Z-210826T0000Z/ Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Bolivar-Sunflower-Leflore-Grenada-Carroll-Washington- Humphreys-Holmes-Issaquena-Sharkey-Yazoo-Madison MS-Warren-Hinds- Including the cities of Crossett, North Crossett, Hamburg, West Crossett, Dermott, Lake Village, Eudora, Bastrop, Oak Grove, Epps, Lake Providence, Rayville, Delhi, Tallulah, Cleveland, Indianola, Ruleville, Greenwood, Grenada, Vaiden, North Carrollton, Carrollton, Greenville, Belzoni, Isola, Durant, Tchula, Lexington, Pickens, Goodman, Mayersville, Rolling Fork, Anguilla, Yazoo City, Ridgeland, Madison, Canton, Vicksburg, and Jackson 310 PM CDT Wed Aug 25 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...HEAT ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT THURSDAY... * WHAT...Heat index values between 105 and 110 degrees expected. * WHERE...Portions of northeast Louisiana, central, north central, northwest and west central Mississippi and southeast Arkansas. * WHEN...For the first Heat Advisory, until 7 PM CDT this evening. For the second Heat Advisory, from 10 AM to 7 PM CDT Thursday. * 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. && $$ LAZ023>026-MSZ028-037-044-049-050-053>056-059>066-072>074-260000- /O.CON.KJAN.HT.Y.0011.000000T0000Z-210826T0000Z/ Franklin LA-Catahoula-Tensas-Concordia-Montgomery-Attala-Leake- Rankin-Scott-Claiborne-Copiah-Simpson-Smith-Jefferson-Adams- Franklin MS-Lincoln-Lawrence-Jefferson Davis-Covington-Jones- Marion-Lamar-Forrest- Including the cities of Winnsboro, Jonesville, Harrisonburg, Newellton, St. Joseph, Waterproof, Vidalia, Ferriday, West Ferriday, Winona, Kosciusko, Carthage, Pearl, Brandon, Richland, Forest, Morton, Port Gibson, Crystal Springs, Hazlehurst, Wesson, Magee, Mendenhall, Taylorsville, Raleigh, Fayette, Natchez, Bude, Roxie, Meadville, Brookhaven, Monticello, New Hebron, Prentiss, Bassfield, Collins, Mount Olive, Laurel, Columbia, West Hattiesburg, Lumberton, Purvis, and Hattiesburg 310 PM CDT Wed Aug 25 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Heat index values between 105 and 110 degrees expected. * WHERE...Portions of northeast Louisiana, southeast Arkansas and much of central Mississippi. * WHEN...until 7 PM CDT Today. * IMPACTS...Hot temperatures and high humidity may cause heat 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. && $$ AJ
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 Jackson, MS wrote its last area forecast discussion before this heat advisory went out at Aug 24, 12:12 PM CDT, 2 hours 49 minutes earlier.
Area forecast discussion, Aug 24, 12:12 PM CDT, 2 hours 49 minutes before
Area Forecast Discussion
National Weather Service Jackson MS
1212 PM CDT Tue Aug 24 2021
.UPDATE...
Updated for 18Z aviation discussion
&&
.AVIATION...
18Z TAF discussion:
Expect VFR and light winds for most of the period. VCTS will be
possible for the southeast this afternoon and evening where better
chances for convection will exist. MVFR vis will be possible late
tonight for KGTR/KHBG/KPIB. /27/
&&
.DISCUSSION...
Hot and humid conditions will continue today as highs reach the mid
90s east to near 100 west. Heat index values will range from around
100 east to near 115 in the west. An Excessive Heat Warning remains
in effect for portions of the west and central, with a Heat Advisory
in effect for portions of the central and east. Isolated showers and
storms will be possible this afternoon and evening across much of
the area. No major changes were needed to the current forecast. /27/
Prior discussion below:
Today & tonight...
Dangerous heat stress is expected today with some chances for
iso-sct aftn rain & storms across the S.
Tues: Expansive mid-level ridge axis is centered over the S Plains &
E-NE flow aloft in the ArkLaMiss. 00Z upper air analysis & GOES E
imagery this morning indicate drier air over N central AL is
advecting to the SW & will gradually move into the area. PWs in GOES
E obs & 00Z BMX sounding indicate less than an inch & a half PWs.
This drier air is progged to advect SW, which will keep rain & iso-
sct storm chances somewhat suppressed to the S & W, generally along
the MS River & along & S of I-20 corridor. With anomalous low-level
thermal warmth, persistence for highs could get in mid-upper 90s &
heat indices similar to Mon. "Significant"/dangerous heat stress
will continue for areas generally along & W of I-55 corridor. Due to
that, kept the ongoing Excessive Heat Warning & exterior Heat
Advisory configuration & timing the same. Some drier low-level air
could help dewpoints mix out a little better to the E & keep heat
stress potential more spotty. Stay cool, hydrated & take all of your
heat safety precautions.
Tonight: Synoptic & sfc pattern will persist, with a retrograding
upper low moving into the Bahamas, while persistent ridge axis will
remain to the W-NW. With increased low-level moisture, lows will
remain above normal in the low-mid 70s. Deeper moisture & mass
convergence will move in late in the SE & a rogue shower or so can't
be ruled out. However, potential will increase more into the aftn
Wed. /DC/
Tomorrow through Tuesday:
The forecast period starts off tomorrow with stout upper ridging
retrograding into the Central Plains to the south of active
westerlies draped along the International Border. Heights will
finally begin to lower across the area which will bring a gradual
end to the oppressive heat conditions. One more day of heat
advisories is likely on Wednesday with heat index values ranging
from 105-110 degrees, especially across the Delta. The ongoing
elevated and limited areas in the HWO/graphics will also be
continued as is. Isolated to scattered coverage of showers and
thunderstorms will also slowly return on Wednesday with the greatest
chances confined to the Pine Belt as seabreeze convection and their
respective boundaries penetrate inland.
Heading into Thursday through the weekend, global guidance continues
to peg the arrival of a Tropical Upper Tropospheric Trough (TUTT)
and associated closed low. This feature is forecast to cross the
Florida peninsula on Thursday morning and into the Lower Mississippi
Valley by the weekend. At the same time, stout sub-tropical ridging
originating from Bermuda will slide west into the coastal plain of
the Carolinas. Resulting southeasterly flow on the western periphery
of the ridge will bring several bouts of deep tropical moisture into
the area. This moisture, in conjunction with the TUTT, will yield
scattered to numerous showers and thunderstorms each day. Friday may
see slightly reduced coverage as a PWAT minimum traverses the area,
but at least scattered coverage is still likely. Low heights and
increasing cloud cover and rain chances will keep temperatures in
check. Afternoon highs will range from the upper 80s to low 90s,
with heat indices remaining below advisory criteria.
By early next week, the synoptic pattern will remain generally
unchanged with a persistent warm and moist late summer pattern
continuing. However, attention will quickly shift to the tropics as
a wave emerges from the Tropical Atlantic into the Caribbean. The
National Hurricane Center gives this activity a 60% chance of
development as it moves into the Northwest Caribbean. Overnight
global model guidance and their respective ensembles are in
agreement with a tropical cyclone tracking across the Yucatan
Peninsula and into the Bay of Campeche by Sunday morning. Ensemble
track envelopes expand significantly beyond this point in time,
which coincides with the flattening of the Carolinas ridge as a
potent northern stream shortwave trough slides through the Northern
Plains and into the Great Lakes region. Ultimately, the track of any
tropical cyclone will depend on strength and placement of the ridge,
thus forecast confidence remains low at this time. /TW/
&&
.PRELIMINARY POINT TEMPS/POPS...
Jackson 96 75 95 74 / 16 4 43 8
Meridian 95 74 94 72 / 14 2 49 10
Vicksburg 100 77 97 75 / 16 4 27 5
Hattiesburg 96 75 92 73 / 30 8 62 19
Natchez 96 75 95 74 / 27 8 45 8
Greenville 98 75 96 74 / 13 2 13 2
Greenwood 97 74 97 74 / 8 2 15 3
&&
.JAN WATCHES/WARNINGS/ADVISORIES...
MS...Heat Advisory until 7 PM CDT this evening for MSZ026>028-036-037-
043-044-049-050-055-056-064>066-072>074.
Excessive Heat Warning until 7 PM CDT this evening for MSZ018-
019-025-034-035-040>042-047-048-053-054-059>063.
LA...Excessive Heat Warning until 7 PM CDT this evening for
LAZ007>009-015-016-023>026.
AR...Excessive Heat Warning until 7 PM CDT this evening for ARZ074-
075.
&&Hazardous weather outlook, Aug 24, 2:48 PM CDT, 13 minutes before
Hazardous Weather Outlook National Weather Service Jackson MS 248 PM CDT Tue Aug 24 2021 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>027-034>036- 040>043-047-048-053>055-059>064-072-252000- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar- Sunflower-Leflore-Grenada-Carroll-Washington-Humphreys-Holmes- Issaquena-Sharkey-Yazoo-Madison MS-Warren-Hinds-Claiborne-Copiah- Simpson-Jefferson-Adams-Franklin MS-Lincoln-Lawrence- Jefferson Davis-Marion- 248 PM CDT Tue Aug 24 2021 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, central Mississippi, north central Mississippi, northwest Mississippi, south central Mississippi, southwest Mississippi, and west central Mississippi. .DAY ONE...Tonight and Wednesday DANGEROUS HEAT THREAT...Elevated TIMING...Wednesday Wednesday, dangerous heat likely with peak heat index values ranging from 106 to 110 degrees. Heat exhaustion will be likely with outdoor activity. (https://www.weather.gov/images/jan/graphicast/2.png) .DAYS TWO THROUGH SEVEN...Wednesday night through Monday The probability for widespread hazardous weather is low. .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations is not expected through next Monday. MSZ028>033-037>039-044>046-049>052-056>058-065-066-073-074-252000- Montgomery-Webster-Clay-Lowndes-Choctaw-Oktibbeha-Attala-Winston- Noxubee-Leake-Neshoba-Kemper-Rankin-Scott-Newton-Lauderdale-Smith- Jasper-Clarke-Covington-Jones-Lamar-Forrest- 248 PM CDT Tue Aug 24 2021 This hazardous weather outlook is for portions of central Mississippi, east central Mississippi, north central Mississippi, northeast Mississippi, and southeast Mississippi. .DAY ONE...Tonight and Wednesday DANGEROUS HEAT THREAT...Limited TIMING...Wednesday Wednesday, caution is advised for possible dangerous heat as heat index values peak near 105 degrees. Heat exhaustion will be possible with outdoor activity. (https://www.weather.gov/images/jan/graphicast/2.png) .DAYS TWO THROUGH SEVEN...Wednesday night through Monday The probability for widespread hazardous weather is low. .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations is not expected through next Monday. 27 && ...HAZARD LEGEND... *DANGEROUS HEAT* Extreme...Extreme heat is expected with peak heat index values in excess of 110 degrees for multiple days. Heat stroke continues to be a major concern. Significant...Dangerous heat expected with peak heat index values in excess of 110 degrees. Heat stroke will be a significant concern. Elevated...Dangerous heat likely with peak heat index values ranging from 106 to 110 degrees. Heat exhaustion will be likely. Limited...Caution is advised for possible dangerous heat as heat index values peak near 105 degrees. Heat exhaustion will be possible. ...USEFUL WEATHER WEB PAGES (URLS)... NWS JAN Home page... https://www.weather.gov/jan Stay Aware, Stay Safe NWS JAN Briefing Page... https://www.weather.gov/jan/safe Latest Weather Briefing... https://www.weather.gov/jan/weather_briefing Tropical page... https://www.weather.gov/srh/tropical?office=jan National Hurricane Center Home Page... https://www.nhc.noaa.gov/ Find NWS JAN on Facebook... https://www.facebook.com/NWSJacksonMS Follow NWS JAN on Twitter... @NWSJacksonMS Follow NWS JAN on Youtube... https://www.youtube.com/user/NWSJacksonMiss
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 5:06 PM CDT | Special Weather Statement | JAN | Franklin | 24 min |
Nearby
Heat Advisories in Mississippi, 2021Heat Advisories in Louisiana, 2021Heat Advisories in Arkansas, 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.