235
FXUS64 KSHV 201832
AFDSHV
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
132 PM CDT MON JUL 20 2026
..NEW DISCUSSION, SPOTTER INFORMATION STATEMENT
KEY MESSAGES
ISSUED AT 123 PM CDT MON JUL 20 2026
- HEAT ADVISORY IN EFFECT FOR THE ENTIRE ARKLATEX CONTINUING THROUGH
8PM TUESDAY EVENING. PROBABLE EXTENSION OF THE ADVISORY INTO
WEDNESDAY, AS HOT TEMPS CONTINUE. CAN'T RULE OUT AN UPGRADE TO
AN EXTREME HEAT WARNING TO SOME AREAS BY WEDNESDAY.
- SLIGHT PRECIPITATION CHANCES THIS AFTERNOON AND AGAIN ON LATE
TUESDAY, MAINLY RESTRICTED TO OUR EASTERN ZONES.
- SOME UNCERTAINTY ON WHETHER OR NOT HEAT RELATED PRODUCTS WILL
BE NEEDED PAST WEDNESDAY NIGHT OR IF WHAT IS FORECASTED TO BE
TROPICAL STORM BERTHA BY THAT TIME OFF/OVER THE SW LA COAST/S
LA WILL HELP OFFSET THE HEAT ENOUGH.
DISCUSSION
ISSUED AT 123 PM CDT MON JUL 20 2026
VISIBLE AND WATER VAPOR IMAGERY REVEAL A STRONG, VERY BROAD AREA OF
HIGH PRESSURE CENTERED OVER COLORADO THAT CONTINUES TO BRING HOT AND
MAINLY DRY WEATHER OVER THE ARKLATEX. YESTERDAY, MOST AREAS UNDER
THE SUPERVISION OF THE OFFICE HAD HEAT INDICES NEAR OR EXCEEDING
105 DEGREES. GIVEN THE LIMITED OVERNIGHT COOLING AND THAT THE
CURRENTLY AMPLIFYING UPPER LEVEL RIDGE MOVING SE TOWARDS THE FOUR
STATE REGION OVER THE NEXT FEW DAYS, A HEAT ADVISORY HAS BEEN
ISSUED UNTIL 8 PM TUESDAY NIGHT ACROSS THE ENTIRETY OF THE CWA.
REMEMBER TO HYDRATE WELL, TAKE BREAKS WHEN NEEDED, KNOW THE SIGNS
FOR HEAT STROKE/EXHAUSTION AND HAVE ACCESS TO AIR CONDITIONING. BE
ON THE LOOKOUT FOR HEAT INDICES AS HIGH AS 110 TODAY, AND EVEN
HIGHER HI THROUGH WEDNESDAY THAT MAY SEE SOME ZONES PLACED INTO AN
EXTREME HEAT WARNING AS CONFIDENCE IN THESE ELEVATED INDICES
INCREASE.
SOME ISOLATED AFTERNOON CONVECTION IS POSSIBLE IN OUR NORTHERN AND
EASTERN ZONES, AS CURRENT SHOWERS AND THUNDERSTORMS OVER
CENTRAL/EASTERN AR DRIFT SLOWLY SOUTHWARD. OVERALL TEMPERATURES OVER
THE REST OF THE DAY SHOULD SEE MOST AREAS INTO THE HIGH 90S, WITH
SOME AREAS BREACHING THE TRIPLE DIGITS. OVERNIGHT LOWS ARE EXPECT TO
STILL REMAIN SEASONABLY WARM IN THE MID TO HIGH 70S, EVEN POSSIBLY
REMAINING IN THE LOW 80S IN SOME OF THE BIGGER CITIES.
AS MENTIONED IN THE KEY MESSAGES, THIS OPPRESSIVE HEAT WILL CONTINUE
INTO TUESDAY AND WEDNESDAY. CURRENTLY, THESE ARE FORECASTED TO BE
THE HOTTEST TEMPERATURES ALL WEEK, WHERE WE COULD END UP SEEING
WIDESPREAD TRIPLE DEGREE HIGHS, ALTHOUGH SOME AREAS MAY REMAIN IN
THE UPPER 90S. ON BOTH DAYS THERE ARE SOME VERY SLIGHT CHANCES OF
PRECIP IN THE SOUTHERN AND EASTERN ZONES, HOWEVER MOST SHOWERS AND
THUNDERSTORMS ARE EXPECTED TO BE ISOLATED. LOWS SHOULD CONTINUE TO
REMAIN ELEVATED TUESDAY AND WEDNESDAY NIGHT IN THE UPPER 70S FOR
MOST AREAS, EVEN BREAKING INTO 80S. HOWEVER, A WEAK COOL FRONT MAY
MOVE FAR ENOUGH SOUTH INTO PORTIONS OF SW AR, SE OK ON WEDNESDAY
NIGHT THAT ALLOW FOR MORE SEASONABLE OVERNIGHT TEMPS THERE.
AS WE MOVE PAST MID-WEEK, WHAT SHOULD BE TROPICAL STORM BERTHA BY
THEN WILL COME INTO FOCUS AS IT TREKS WESTWARD PARALLEL WITH THE S
LA COAST. CURRENT FORECASTS PROG QUITE A BIT OF SHEAR THAT WILL
LIKELY INFLUENCE THIS TROPICAL SYSTEM AND THAT COULD KEEP THE
NORTHERN/INLAND PART OF THIS STORM RELATIVELY DRY ACROSS OUR
SOUTHERN REGION. WORKING WITH THAT WEAK COOL FRONT ACROSS OUR
NORTHERN ZONES, THERE COULD BE ENOUGH DRIER AIR CONSUMED BY THE
STORM THAT COULD MIX AND HELP OFFSET HEATING ENOUGH ACROSS THE FOUR
STATE REGION. WHETHER OR NOT THIS WILL BE ENOUGH TO STOP ISSUING
HEAT RELATED PRODUCTS IS UNCERTAIN AT THIS TIME AND WILL BE FURTHER
NAILED DOWN IN FUTURE FORECASTS.
BY THE WEEKEND, CLUSTER ANALYSIS CONTINUES TO HAVE THIS UPPER LEVEL
RIDGE THAT HAS DOMINATED MOST OF THIS DISCUSSION TO REMAIN MOSTLY
OVERHEAD, BUT HAVE ITS CENTER RETROGRADE SLOWLY BACK WEST. SOME HEAT
PRODUCTS MAY BE ISSUED AS TEMPERATURES AND HEAT INDICES BECOME MORE
CLEAR.
OZIMEK/HEMINGWAY
AVIATION
(18Z TAFS)
ISSUED AT 123 PM CDT MON JUL 20 2026
FOR THE 20/18Z TAF PERIOD, VFR CONDITIONS TO PREVAIL ACROSS AREA
TERMINALS AS HIGH PRESSURE REMAINS ESTABLISHED ACROSS THE REGION.
LIGHT SOUTHWEST WINDS AROUND 4 KNOTS OR LESS TODAY TO BECOME LIGHT
AND VARIABLE OVERNIGHT. OTHERWISE, WINDS TO BECOME NORTHWEST ON
TUESDAY.
/05/
SPOTTER INFORMATION STATEMENT
ISSUED AT 123 PM CDT MON JUL 20 2026
SPOTTER ACTIVATION IS NOT EXPECTED THROUGH THE MIDDLE OF THIS
WEEK.
PRELIMINARY POINT TEMPS/POPS
SHV 79 99 82 101 / 0 0 0 0
MLU 79 100 80 100 / 10 20 20 0
DEQ 75 98 77 97 / 0 0 0 0
TXK 78 100 79 100 / 0 0 0 0
ELD 77 99 78 98 / 0 10 0 0
TYR 78 100 81 102 / 0 0 0 0
GGG 78 101 81 102 / 0 0 0 0
LFK 75 100 79 102 / 0 0 0 0
SHV WATCHES/WARNINGS/ADVISORIES
AR...HEAT ADVISORY UNTIL 8 PM CDT TUESDAY FOR ARZ050-051-059>061-
070>073.
LA...HEAT ADVISORY UNTIL 8 PM CDT TUESDAY FOR LAZ001>006-010>014-
017>022.
OK...HEAT ADVISORY UNTIL 8 PM CDT TUESDAY FOR OKZ077.
TX...HEAT ADVISORY UNTIL 8 PM CDT TUESDAY FOR TXZ096-097-108>112-
124>126-136>138-149>153-165>167.
DISCUSSION...19
AVIATION...05
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