-- Discussion containing changed information from previous version are highlighted. --
991
FXUS64 KLZK 230529
AFDLZK

Area Forecast Discussion
National Weather Service Little Rock AR
1229 AM CDT Sun Jun 23 2024

...New AVIATION...

.SHORT TERM...
(This evening through Monday)
Issued at 212 PM CDT Sat Jun 22 2024

19z satellite and surface observations indicate scattered CU
across the state. Temperatures were near to slightly above normal.

Expect slightly higher low level moisture to be in place Sunday, as
indicated by forecast dew point temperatures.  Accordingly, forecast
heat index, wet bulb globe temperatures, and (experimental) heat
risk categories indicate fairly dangerous heat stress conditions
across the forecast area during the afternoon and early evening.
Appropriate headlines have been issued. Later forecasts will
evaluate for headlines concerning Monday`s potential heat stress
conditions.

Expect a weak boundary to approach northern sections of the
forecast area late tonight, and may promote widely scattered
convection across these areas on SUnday.

&&

.LONG TERM...
(Monday Night through next Saturday)
Issued at 212 PM CDT Sat Jun 22 2024

Persistence condns wl cont to headline the long term fcst thru the
end of this week... Hazardous heat looks to remain in place acrs
much of the AR region and Srn Cntrl US.

Mean H500 ridging wl remain in place over the Cont Divide thru much
of the PD. The primary upper level high and asctd greater anomalous
H500 heights looks to stay displaced to the west of the FA,
remaining centered over the Desert S/W regions, however, regionally
hot and humid condns are expected to persist.

Mean upper W-N/Wrly flow wl reside acrs the Upper Midwest and Great
Lakes region, w/ meager upper flow persisting over the FA. At the
sfc, broad but weak sfc high pressure wl extend across most of
Appalachia towards the Ern coastline, and lee cyclonic sfc flow is
progged to persist over the Cntrl Plains. This pattern wl keep mean
Srly to S/Wrly sfc flow acrs the FA and the greater Srn Plains thru
most of the PD.

Confidence on fcst daily high temps, particularly among NBM guidance
is fairly high, w/ 80% confidence intervals of 5 degrees or less
thru the end of the week. That being said, daily high temps are set
to reach the mid to upper 90s daily, w/ some areas across Cntrl to
Srn AR approaching or reaching 100 degrees as well, particularly on
Tues aftn, and possibly again by Sat aftn.

Alongside hot aftn temps, sultry humidity levels wl keep maximum
aftn heat index values in excess of 105 to 110 degrees or more area-
wide, thru Wed aftn, w/ covg of heat advisory criteria diminishing
to Wrn and S/Wrn AR by Thurs and Fri aftn. In addition to hazardous
afternoon heat, overnight low temps wl keep heat hazard risks
elevated during the nighttime hours as well. Current fcst lows are
set to only fall to the upper 70s, to near 80 degrees in some
locations thru the end of the PD. This wl severely limit overnight
cooling potential, posing a non-stop heat risk.

Some daytime relief wl be noted on Wed and Thurs, as a prominent
H500 shortwave/vorticity max is progged to eject thru the mean W-
N/Wrly flow, and drive a round of widespread rain chances thru the
day Wed and into Thurs. Scattered to widespread precip should
provide slightly cooler aftn temps in the low 90s for at least a few
days, and incrsg daytime cloud cover as well.

By Fri, temps wl be on the rise again, as the upper closed high
shifts E/wrd, centering over the Srn Cntrl US, and stronger
perturbed upper flow acrs the Nrn US recedes towards the US/Canada
border. Greater synoptic subsidence via diff anti-cyclonic VA along
the inflection point of upper ridging/troughing over the Cntrl to
Nrn Plains should result in a strong sfc high developing. This sfc
high pressure is progged to move S/wrd towards the FA late in the PD
towards the end of next weekend. Some discrepancies still remain b/w
the the most recent 12Z suite of long range guidance, however this
looks to be the next best chance for rain and possibly cooler temps
locally.

&&

.AVIATION...
-- Changed Discussion --
(06Z TAFS)
Issued at 1220 AM CDT Sun Jun 23 2024

The center of the upper ridge has moved into Texas. A cold front
will move into north Arkansas this afternoon and esentially
stall. A slight chance of showers and thunderstorms will be mainly
in the north near the front. VFR conditions will continue through
the period.
-- End Changed Discussion --

&&

.PRELIMINARY POINT TEMPS/POPS...
-- Changed Discussion --
Batesville AR     95  74  96  75 /  20   0   0   0
Camden AR         98  76  99  75 /  20  20  10   0
Harrison AR       94  72  95  73 /  20   0   0   0
Hot Springs AR    97  76  98  75 /  20  20  10   0
Little Rock   AR  97  79  97  78 /  20  20  10   0
Monticello AR     97  79  96  77 /  20  20  10   0
Mount Ida AR      95  75  96  74 /  20  20  10   0
Mountain Home AR  95  72  95  73 /  20   0   0   0
Newport AR        95  77  97  76 /  20   0   0   0
Pine Bluff AR     96  78  96  77 /  20  20  10   0
Russellville AR   97  76  97  76 /  20  10  10   0
Searcy AR         96  75  97  75 /  20  10   0   0
Stuttgart AR      94  78  95  78 /  20  20  10   0
-- End Changed Discussion --

&&

.LZK WATCHES/WARNINGS/ADVISORIES...
-- Changed Discussion --
Heat Advisory from noon today to 9 PM CDT this evening for
ARZ006>008-014>017-024-025-031>034-039-042>047-052>057-062>069-
121>123-130-137-138-141-230-237-238-241.
-- End Changed Discussion --

&&

$$

SHORT TERM...55
LONG TERM....72
AVIATION...51