Area Forecast Discussion
Issued by NWS Kansas City/Pleasant Hill, MO

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

029
FXUS63 KEAX 242102
AFDEAX

Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
402 PM CDT SUN APR 24 2016

.Discussion...
Issued at 402 PM CDT SUN APR 24 2016

Short Term (Tonight through Tuesday):

Tonight: Thunderstorms have begun to develop across eastern Nebraska
and central Kansas along a dry line. These thunderstorms will
continue to shift slowly east late this afternoon into this evening.
Storms are developing in an area of 1500-2000J/kg of MUCAPE,and dew
points in the upper 50s to near 60. Consequently these storms will
have the potential to be severe. Large hail and damaging winds will
the main threat despite the fact that 0-6km bulk shear is currently
weak it is expected to increase during the evening hours. These
storms will move east toward the CWA this evening however, hi-res
models suggest they will be diminishing as they reach us but does
depict a quasi-linear mode of storms that will be capable of
producing strong to damaging winds across extreme northeastern
Kansas and northwest Missouri. Further south across eastern Kansas
and northern Missouri, storms will be weakened as they move into
more stable air. Storms will continue through midnight before they
diminish in the overnight hours.

Monday through Tuesday: The upper level system that is the catalyst
for tonight`s system will move into the upper Midwest and weaken.
The attendant cold front will sag into the area tomorrow morning.
this front will slowly sag through the CWA during the day. Weak
convergence and moderate instability of 1000-1500J/kg of CAPE south
of the front may be enough to spark convection south of the front
however lack of forcing may keep conditions quiet. Consequently,
have just slight chance POPs across the southern CWA. Monday night
the front will become stationary across the southern CWA or just
south of the CWA. During the overnight hours a 40-50kt SWly LLJ will
increase across eastern OK and nose into sern KS/swrn MO. This may
provide enough lift to over run the stationary boundary and allow
for thunderstorm development that would affect the southern CWA late
Monday night into Tuesday morning. Tuesday a vigorous upper level
trough will move from the central Rockies into the High Plains. An
associated cold front will move into the western Plains with a dry
line across central Kansas. This will be the system to watch during
the extended period as there is the potential for all mode of severe
weather with this system. However, outside of morning showers and
storms, the area looks to remain capped through the day keeping
conditions dry will highs in the mid 70s to lower 80s.

Tuesday night through Sunday:

There will be two system capable of producing severe weather in the
extended period. The first will come on Tuesday night into
Wednesday. Tuesday night the aforementioned upper level trough will
move into central Plains taking on a negative tilt as it does so. As
it does an embedded shortwave will rotate around the base of the
trough ushering in cooler air aloft and eroding the cap. This will
allow storms to develop along the aforementioned dryline in eastern
Kansas. With strong shear, instability and moisture all modes of
severe weather will be possible. PWAT values approaching 1.5" will
also these storms to be very efficient and flooding can not be ruled
out. Storms will push east across the CWA Tuesday night into
Wednesday morning. Wednesday, the upper level trough will move
through the eastern Plains weakening as it does. An attendant cold
front will move into Wednesday afternoon. Any severe potential is
conditional if the airmass can rebound from morning convection. If
conditions do destabilize severe storms will again be possible
across the eastern 2/3rds of the CWA. The front finally pushes east
of the area Wednesday night and we brief dry out on Wednesday night
and Thursday. Friday night, yet another negatively tilted upper
trough will move into the Plains allowing thunderstorm to overspread
the area. Shear, moisture, and instability will also be conducive
for severe storms Friday night into Saturday. Sunday, the upper
level system moves through the region continuing shower and
thunderstorm chances.


&&

.Aviation...(For the 18Z TAFS through 18Z Monday Afternoon)
Issued at 1210 PM CDT SUN APR 24 2016

VFR conds with sct mid-lvl clouds will persist thru the afternoon
into the evening. Hi-res models as well as the NAM suggest there may
be a few thunderstorms in the VC of the terminals btn 03Z-06Z.
However, thunderstorms will remain north and west of the TAF sites
with the exception of STJ which may experience thunderstorms btn 02Z-
05Z. Otrw...expect sct-bkn cigs around 5kft tonight. Tomorrow morning
models are in good agreement that MVFR cigs btn 1-2kft will move into
the terminals btn 11Z-13Z. Winds this afternoon will remain out of
the south btn 15-20kts with gusts 25-30kts. Winds will diminish
slightly this evening but remain gusty. After midnight gusts will
diminish as winds remain sustained btn 10-15kts out of the SSW.


&&

.EAX Watches/Warnings/Advisories...
KS...None.
MO...None.
&&

$$

Discussion...73
Aviation...73



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.