River Flood Warning 343, NWS Kansas City, MO

AREA FORECAST DISCUSSION
National Weather Service Kansas City/Pleasant Hill MO
537 AM CST SUN DEC 13 2015

.DISCUSSION...
Issued at 313 AM CST SUN DEC 13 2015

The main concern for this forecast resides in the first 36 hours of
the forecast period. That concern will come in the form of the
potential of a few rounds of heavy rainfall and the residual
flooding along area rivers, creeks, and streams.

A nearly stationary cold front is extending from near Des Moines
into northwest Missouri and further southwest to near Wichita. Warm,
moist air resides ahead of the front with showers and a few
thunderstorms already streaming into the area early this morning.
This cold front is expected to remain stationary today as a few
waves of very efficient moisture pushes into the area. This is
evident by PWAT values that are near 400% of normal for this time of
year which are ranging between 1.50"-1.75". As such, have PoPs near
100%. Temperatures should remain fairly steady today as the front
remains stationary however, there should be a fairly sharp gradient
in temperatures across the front with northwest Missouri
experiencing highs in the upper 40s where in the warm sector highs
will be in the low to mid 60s.

Tonight a surface low will develop along the front across northwest
Missouri, and move northeastward, this will help push the front east
a bit. However, albeit lighter in nature, rain should persist into
tonight for most of the CWA. It will not be until tomorrow morning
when the upper level low associated with this system finally moves
through the CWA that the bulk of precipitation moves east of the
area. However, on the back side of the upper low there may be some
deformation-type rain across the northern CWA. All told, by Monday
afternoon most areas across the CWA will have received between 1.50"-
2.50" of precipitation. It is in that range that most headwater
guidance resides as well which makes flooding a concern. Although
major flooding is not expected, there certainly could be minor (to
even moderate) flooding along a few areas rivers, creeks and
streams. Temperatures will also be cooler behind the cold front on
Monday with highs in the 40s.

Beyond this rain event the forecast looks relatively benign. Warm
air advection briefly returns to the area on Tuesday out ahead of
another upper level system. Highs will warm into the upper 40s to
near 60. However, Tuesday night, the upper level low will move from
western Nebraska into northern Iowa forcing yet another cold front
through the area. This frontal passage will remain mainly dry as
moisture will be meager however, there could be a few light rain or
snow showers across northern Missouri Tuesday night. Temperatures
for the second half of the work week will return to seasonably
normal conditions with highs generally in  the mid 30s to mid 40s as
broad troughing aloft reside across the central CONUS.

Saturday looks to be a transition day as upper level troughing
begins to shift eastward as upper level ridging begins to move into
the region from the west. High pressure at the surface however, will
still keep temperatures seasonable with highs in the mid 30s to
lower 40s. Sunday, both the EC and GFS advertise the upper level
ridge pushing into the region and allowing temperatures to warm.
Expect highs in the lower 40s to lower 50s.

&&

.AVIATION...(For the 12Z TAFS through 12Z Monday Morning)
Issued at 537 AM CST SUN DEC 13 2015

A large plume of moisture is lifting north across eastern Kansas and
western Missouri and will reach the terminals by the 12Z period. Rain
can be expected through this evening reducing vsbys to 4-5SM with IFR
and LIFR cigs. There may be a period of heavier rain btn 15Z-19Z
where vsbys could be further reduced to 1SM-3SM. Steady rain will
come to an end around 03Z-05Z however there will be lgt showers in
the VC of the terminals through the end of the TAF period. There may
be a slight improvement in cigs tonight as winds will increase out of
the SW and become gusty. Otrw...winds this morning will be out of
the ESE around 10kts with the exception of STJ which is behind the
stationary front and winds will be out of the north. This afternoon
winds will gradually back to the SW around 10kts before picking up to
10 to 15kts tonight with gusts to 20-25kts.

&&

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

DISCUSSION...73
AVIATION...73

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
524 AM CST SUN DEC 13 2015

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-141130-
ATCHISON KS-MIAMI-LINN KS-DONIPHAN-LEAVENWORTH-WYANDOTTE-JOHNSON KS-
ATCHISON MO-NODAWAY-WORTH-GENTRY-HARRISON-MERCER-PUTNAM-SCHUYLER-
HOLT-ANDREW-DE KALB-DAVIESS-GRUNDY-SULLIVAN-ADAIR-BUCHANAN-CLINTON-
CALDWELL-LIVINGSTON-LINN MO-MACON-PLATTE-CLAY-RAY-CARROLL-CHARITON-
RANDOLPH-JACKSON-LAFAYETTE-SALINE-HOWARD-CASS-JOHNSON MO-PETTIS-
COOPER-BATES-HENRY-
524 AM CST SUN DEC 13 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST...NORTH CENTRAL AND
WEST CENTRAL MISSOURI...AS WELL AS EXTREME EASTERN KANSAS.

.DAY ONE...TODAY AND TONIGHT

 ONE TO TWO INCHES OF RAIN IS EXPECTED TODAY. EXPECT SOME AREA RIVERS
 AND STREAMS TO REACH FLOOD STAGE LATE TONIGHT AND MONDAY.

 MORE DETAILED INFORMATION CAN BE ACCESSED AT...
 HTTP://WWW.WEATHER.GOV/EAX/HWO

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

 NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

 MORE DETAILED INFORMATION CAN BE ACCESSED AT...
 HTTP://WWW.WEATHER.GOV/EAX/HWO