Severe Thunderstorm Warning 326, NWS Little Rock, AR

Area Forecast Discussion...Update
National Weather Service Little Rock AR
555 PM CST Mon Dec 4 2017

.Aviation...

Overall VFR ceilings with patchy areas of MVFR ceilings will be seen
this evening and into the overnight. A cold front and upper system
will move through AR and develop scattered showers and isolated
thunderstorms that will affect all Taf sites. MVFR conditions are
expected with the convection. A low level jet has set up and low
level win shear maybe encountered at all Tafs. Winds ahead of the
cold front will be south at 10 to 20 mph, then switch to the west to
northwest at 10 to 20 mph. Toward Tuesday morning, the convection
will push southeast, and end from northwest to central, then
gradually south of all Taf sites. Ceilings will also thin and lift
gradually from the northwest behind the cold front. (59)

&&

.Prev Discussion.../ Issued 300 PM CST Mon Dec 4 2017/
.SHORT TERM...Tonight Through Wednesday

Breezy south winds brought abundant low lvl moisture/clouds into AR
today. Sctd showers affected parts of AR this mrng and into the aftn
hrs as a weak upr lvl impulse moved thru the area. Temps were not
warming as fast this aftn due to the low clouds, with most areas in
the 60s. Clouds were starting to break up some acrs S AR, where
readings had warmed into the lower/mid 70s. Meanwhile, Sfc dewpoints
were climbing into the lower/mid 60s acrs Wrn and Central AR.

All of this is occurring ahead of a strong CDFNT that wl move thru AR
tngt and early on Tue. At mid aftn, the bndry was located fm WRN MO,
back into NW OK. The Hi-Res model data rmn consistent with our
current thinking regarding timing to the front thru the FA.

Sctd to numerous SHRA/TSRA wl accompany the fnt tngt. With a high
shear/low CAPE environment in place, some strong/svr storms cannot
be ruled out tngt, mainly acrs the Wrn half of AR. Damaging winds wl
be the main concern, along with large hail and perhaps an isolated
tornado or two.

Once the front passed thru the FA tngt into TUe, look for a shift to
NW winds, ushering in much colder air. By Wed, the assocd high pres
rdg wl shift just S of AR, with light west winds returning. This wl
allow airmass to modify a bit, but temps wl stay just below seasonal
norms.
&&

.LONG TERM...Wednesday Night Through Monday

Long term will see quite the amplified upper air pattern with below
normal temperatures throughout the entire long term. The long term
model blend seems to be running a bit warm and seems to be too
heavily influenced by climatology...however with the pattern so
significantly amplified I do believe the model blend is not handling
this strong push of Arctic air well at all...therefore did trend
temps a lower than model blend.

Thursday into Friday an upper low will swing through the region and
bring a reinforcing shot of cold air as a cold front pushes south
into the state. With very limited moisture in place, no
precipitation is expected with the passage of this front. Previous
runs of the GFS have the potential for some snow flurries Thursday
night into Friday morning, the 12Z GFS has backed off on this
solution and has moved more in line with the ECMWF. That
said...Friday night a vort max will swing through northern
Arkansas...and despite limited moisture I would not be surprised to
see some light flurries. The ECMWF is a bit more excited about this
solution than the GFS...however the GFS is fairly similar in timing
of this system...it just keeps the "best" moisture to the north of
Arkansas. Having been burned by a similar set up in the past...will
lean more towards the ECMWF solution and added POPs/mention of snow
into the forecast Friday night.
&&

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

Short Term...44 / Long Term...65

Hazardous Weather Outlook...Update
National Weather Service Little Rock AR
430 PM CST Mon Dec 4 2017

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-051100-
Boone-Marion-Baxter-Fulton-Sharp-Newton-Searcy-Stone-Izard-
Independence-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-
430 PM CST Mon Dec 4 2017

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

.DAY ONE...This Evening and Tonight

A cold front will move through the state this evening and tonight.
Showers and thunderstorms are expected ahead of and along the front.
A slight risk of strong to severe storms may develop over western
parts of Arkansas, while a marginal risk will be possible over much
of the rest of the state. The main threat of any severe storm will
be damaging winds. Some possible hail could also be seen, and the
tornado threat is not zero. Overall, any severe storm threat is
forecast to be isolated and low. Toward Tuesday morning, any
remaining storms will be pushing to southeast Arkansas and
weakening.

Winds across the area will increase out of the south ahead of the
front with strong northwesterly winds expected immediately in its
wake.

.DAYS TWO THROUGH SEVEN...Tuesday Through Sunday

Scattered showers with isolated thunderstorms are expected to be
moving southeast out of the state in the morning. Then, colder
weather will prevail Tuesday through Sunday. A low pressure system
will drag a cold front into the region late Thursday or early
Friday. Winds around the system could be gusty, and humidity will be
low. These conditions could allow for increased wildfire danger in
much of the state by late in the week and into the weekend.

.Spotter Information Statement...

Spotter activation is not anticipated at this time due to the
isolated nature of any severe storm threat.

&&

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

67/57/59

Special Weather Statement
National Weather Service Little Rock AR
508 PM CST MON DEC 4 2017

ARZ041-042-054-042345-
Hot Spring AR-Garland AR-Montgomery AR-
508 PM CST MON DEC 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN GARLAND...WESTERN
HOT SPRING AND SOUTHEASTERN MONTGOMERY COUNTIES UNTIL 545 PM CST...

At 508 PM CST, Doppler radar was tracking a strong thunderstorm near
Glenwood, or 10 miles south of Mount Ida, moving northeast at 35 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Glenwood...                       Meyers...
Bonnerdale...                     Crystal Springs Landing...
Welsh...                          Pearcy...
Crystal Springs...                Caddo Gap...
Royal...                          Sunshine...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3457 9343 3451 9324 3436 9326 3434 9357
      3434 9362 3435 9365 3442 9366
TIME...MOT...LOC 2308Z 246DEG 32KT 3440 9356

Cooper

Special Weather Statement
National Weather Service Little Rock AR
637 PM CST MON DEC 4 2017

ARZ053-054-050115-
Hot Spring AR-Clark AR-
637 PM CST MON DEC 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CLARK AND SOUTH
CENTRAL HOT SPRING COUNTIES UNTIL 715 PM CST...

At 637 PM CST, Doppler radar was tracking a strong thunderstorm near
Arkadelphia, moving northeast at 30 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Arkadelphia...                    Caddo Valley...
Gum Springs in Clark County...    DeGray Lake State Park...
Donaldson...                      Friendship...
Lower Lake Recreation Area...     De Roche...
Midway in Hot Spring County...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3405 9314 3409 9320 3414 9324 3436 9304
      3429 9292 3417 9285
TIME...MOT...LOC 0037Z 228DEG 24KT 3414 9314

Cooper

Special Weather Statement
National Weather Service Little Rock AR
643 PM CST MON DEC 4 2017

ARZ030-037-050130-
Scott AR-Logan AR-
643 PM CST MON DEC 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN LOGAN AND
NORTHEASTERN SCOTT COUNTIES UNTIL 730 PM CST...

At 642 PM CST, Doppler radar was tracking a strong thunderstorm over
Huntington, or 16 miles northwest of Waldron, moving east at 35 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Booneville...                     Mansfield...
Cardiff...                        Echo...
Barber...                         Lucas...
Chismville...                     Carolan...
Grayson...                        Glendale in Logan County...
Ione...                           Elm Park...
Liberty...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3507 9422 3508 9422 3508 9420 3509 9418
      3510 9414 3514 9414 3514 9403 3523 9403
      3523 9392 3526 9392 3511 9382 3492 9390
      3497 9423 3506 9423 3506 9425 3507 9425
TIME...MOT...LOC 0042Z 264DEG 30KT 3507 9429

Cooper