Flash Flood Warning 10, NWS Little Rock, AR

Area Forecast Discussion
National Weather Service Little Rock AR
643 PM CDT Sun Mar 24 2019

.AVIATION...
Deep convection starting over northern and western Arkansas at
this time as a cold front approaches the area. The system will
move slowly across the state tonight with scattered showers and
thunderstorms accompanying the boundary. Some of these storms may
be strong to severe with gusty winds and hail the primary
concern. Winds will shift from the southeast to the northwest
behind the boundary. VFR conditions will prevail for the majority
of the period with the exception of MVFR conditions when the
storms pass through. Low level moisture will remain over the north
for a good part of the day Monday.

&&

.PREV DISCUSSION...(ISSUED 213 PM CDT Sun Mar 24 2019)
SHORT TERM...Tonight Through Tuesday

Satellite imagery and surface obs were showing a surface cold front
extending from around Joplin, MO southwestward through eastern OK on
into north central TX. A capping inversion was inhibiting the
development of any thunderstorms through the early afternoon hours,
but this will change as the front progresses southeastward and the
cap breaks. The front is currently on track to enter the northwest
portion of AR in a couple of hours and will sweep southeastward
through the forecast area during the evening and overnight hours.
Latest runs of short-term models were indicating the development of
discrete thunderstorms/supercells along the front beginning around
00Z. Any storms that do form will be able to tap into CAPE values
greater than 1,000 J/kg but approaching 2,000 J/kg over the
southwest portion of the state. The front will also have some upper
level support as a shortwave trough traverses the area amidst quasi-
zonal flow aloft. While large hail and strong winds are the most
likely severe weather modes, the possibility of tornadoes has crept
up some due to increased low level shear availability. Incidentally,
the SPC has placed an area of enhanced risk in the Day 1 Severe
Outlook over southwest AR in line with the aforementioned reasoning.

Drier northwest flow will develop across AR, both at the surface and
aloft, on Monday as the progressive front exits the forecast area to
the southeast and a broad mid/upper level ridge builds eastward into
the state from the western U.S. Afternoon highs will generally range
from the mid 60s over the higher terrain of northern AR to the lower
70s over the southern portion of the forecast area. Precipitation-
free conditions, along with clearing skies, will prevail Monday
night/Tuesday as the aforementioned ridge of high pressure continues
to build over the state. Under mostly sunny skies with light
northeast winds on Tuesday, high temperatures will mostly range from
the upper 50s over the northern higher terrain to the mid 60s over
the south.

LONG TERM...Tuesday Night Through Sunday

Upper ow pressure will be over Alabama and Georgia to begin the
extended period with a large upper ridge over the Plains. This ridge
will expand over much of the country Wednesday as the upper low
moves off the southeast coast of the U.S. By Friday, a strong upper
low pressure moves into the Rockies, moving slowly southeast
Saturday and Sunday.

High pressure over the area Tuesday night and Wednesday will move
east of the area Thursday. Low pressure in the Plains Friday will
bring a warm front across Arkansas and the associated cold front
through the state Friday night. As instability increases, chances
for showers and thunderstorms will increase Thursday night and will
be greatest Friday night and Saturday. Temperatures will be close to
normal through much of the period but below normal by Sunday.

&&

.LZK Watches/Warnings/Advisories...NONE.
&&

Aviation...GOUDSWARD

Hazardous Weather Outlook...UPDATED
National Weather Service Little Rock AR
533 PM CDT Sun Mar 24 2019

ARZ003>008-012>017-021>025-030>034-037>047-052>057-062>069-252245-
Boone-Marion-Baxter-Fulton-Sharp-Randolph-Newton-Searcy-Stone-
Izard-Independence-Lawrence-Johnson-Pope-Van Buren-Cleburne-
Jackson-Logan-Conway-Faulkner-White-Woodruff-Scott-Yell-Perry-
Polk-Montgomery-Garland-Saline-Pulaski-Lonoke-Prairie-Monroe-Pike-
Clark-Hot Spring-Grant-Jefferson-Arkansas-Dallas-Cleveland-
Lincoln-Desha-Ouachita-Calhoun-Bradley-Drew-
533 PM CDT Sun Mar 24 2019

This Hazardous Weather Outlook is for a Large Part of Arkansas.

.DAY ONE...This evening and Tonight

A cold front will continue to move into Arkansas from the
northwest this evening and eventually push through the rest of
the state tonight. Showers and thunderstorms are expected to
accompany the front. A few storms could become severe with large
hail, damaging winds, and possibly a tornado.

.Spotter activation is possible.

.DAYS TWO THROUGH SEVEN...Monday Through Saturday

Unsettled weather will return to the region later in the week as a
new storm system affects Arkansas. Thunderstorm chances are in the
forecast, but the potential for any severe weather remains uncertain
at this time.

.Spotter Information Statement...

Spotter activation may be needed this evening and tonight.

&&

Visit NWS Little Rock on the web. Go to http://weather.gov/lzk.

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