River Flood Warning 78, NWS Kansas City, MO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1230 PM CDT Mon May 27 2013

.UPDATE...
Issued at 1158 AM CDT MON MAY 27 2013

Cold pool being put down by the convective complex moving through the
Missouri is slowing its southern push as south to southwest winds
across southern Kansas and Missouri work to impede its progress. The
southwest flow at the surface through the mid-levels will continue to
intersect the cold pool across southeast Kansas through the early
afternoon hours. This interaction will continue to fuel scattered
storms, with these storms moving east through west central and
central Missouri. Storms through the early afternoon are expected to
remain sub-severe owing to the stabilizing cold pool.

Thoughts are that by mid-afternoon some warmer temperatures might
finally move in aloft across southeast Kansas and west central
Missouri, likely bringing a slow end to the storms south of the
Missouri River. However, focus for initiating more storms will
quickly shift into south central to southeast Nebraska as the cold
pool washes out, allowing the southwest flow to bring mass
convergence back to the true frontal boundary wallowing across
Nebraska and Iowa. Convection from this activity will then shift east
into northwest Missouri this evening. Some strong to severe storms
will be possible this evening, with torrential rain and large hail
thought to be the primary threats at this time.

UPDATE Issued at 913 AM CDT MON MAY 27 2013

Convective complex continues to sweep south and east through eastern
Kansas and Missouri this morning. Activity along the leading edge of the
complex is where the strongest storms are located, but even these are
falling just shy of producing severe weather with reports of dime to
nickle sized hail with 40 to 50 mph winds.

This line of storms will continue to progress south through eastern
Kansas and south and east through Missouri, though latest radar
trends show the storms weakening and activity beginning to move more
east to west along the segment of the line of storms moving south.
Thoughts are that the southern progression of this line should begin
to slow as what is left of the nocturnal low level interacts with the
cold pool behind the line of storms, helping develop activity across
east central Kansas which moves parallel to the leading edge of the
advancing cold pool. Expect this activity to persist through much of
the morning hours, finally tapering off as the low level jet mixes
out late this morning. Cast off showers to the north of the line
should keep areas north of I-70 cool, wet and stabilized through at
least the afternoon hours, areas south of I-70 may have to contend
with redevelopment depending on whether the stabilizing cold pool can
settle that far south.

However, by the late afternoon hours continued convergence along the
true frontal boundary, which will likely still be wallowing around the
northwest corner of Missouri, may be able to reignite thunderstorm
activity for the late afternoon and evening hours. This will make
thunderstorms likely for this evening in areas north of a Kansas City
to Unionville line.

&&

.SHORT TERM...(Today and Tonight)
Issued at 341 AM CDT MON MAY 27 2013

Large MCS is tracking southeastward out of eastern NE into IA and
northwest MO early this morning. This complex will likely hold
together for several more hours as it pushes into a region of high
elevated instability over northeast KS and western MO. Deep-layer
shear is quite weak, and is maximized north of the IA/MO border. This
should keep the highest severe thunderstorm threat to the north of
the forecast area where better shear will be aligned with a surface
front from near Omaha into south central Iowa. However, conditions
are favorable for a marginal severe threat further south, and there
could be some scattered severe wind gusts as far south as the US 36
corridor through mid morning. Therefore severe thunderstorm watch
226 has been issued through 10 am for areas north and northeast of
Kansas City. This activity should begin to weaken by mid morning,
though it could survive in the form of a band of showers and embedded
weak thunderstorms as far south and east as central Missouri and the
Ozarks.

Forecast for today and tonight will be complicated by the likelihood
of cloud debris and one or more outflow boundaries left behind by
this morning's thunderstorm complex. Cirrus shield behind this system
is quite extensive and could keep northern and central MO mostly
cloudy for most of the day. Further west, outflow boundary will
likely set up somewhere over northern KS and northwest MO with areas
south of the boundary likely to warm into the mid 80s this afternoon.
This could set the stage for scattered thunderstorms redeveloping this
afternoon as the airmass destabilizes, but pinpointing any afternoon
activity is quite a challenge at this point.

Organized severe thunderstorms may develop over north central Kansas
later this afternoon and spread eastward into eastern KS and
northwest MO this evening and overnight. This activity will have much
better wind fields to work with compared to this morning's
thunderstorm complex and will be aided by a very strong 50-60 kt LLJ
nosing into west central MO after 00Z. These wind fields combined
with moderate to strong elevated instability could favor a strong
thunderstorm complex tracking eastward across the I-70 corridor and
points north tonight. Large hail and damaging winds would be the
primary threats with this activity, along with locally heavy rainfall
could also pose flooding problems for areas that received heavy
rainfall on Sunday.

.LONG TERM...(Tuesday through Sunday)
Issued at 341 AM CDT MON MAY 27 2013

This is expected to be a very active week of weather across the
Central United States with several rounds of severe weather likely.
The cause of this active period of weather is a deepening mid-level
trough across the western CONUS. By Tuesday, we'll be dealing with
the leftover convection from tonight's activity across the northern
half of Missouri. Another warm and very unstable airmass is expected
to build over the CWA and ahead of a stalled front in central Kansas
through eastern Nebraska.  Convection will once again redevelop late
Tuesday afternoon along and east of this boundary, quickly
congealing into a wind producing MCS overnight as it moves northeast
into Wednesday morning.

The focus for Wednesday will be to the west as a powerful upper
level trough deepens over the Four Corners region. Discrete
convection will likely reignite over portions of western Kansas and
the Oklahoma Panhandle Wednesday afternoon, again quickly congealing
into one or more large MCS as the LLJ intensifies overnight. This
activity would arrive Wednesday night into Thursday.

The severe weather threat on Thursday is highly conditional on how
the area can recover from the activity Wednesday night.
Nevertheless, fairly widespread convection should break out Thursday
afternoon as front/dry line edges eastward. Instability will likely
not be as high as on Tuesday/Wednesday, the the increase in 0-6KM
shear will be substantial.  The effective front will only move
slightly eastward by Friday, setting the stage for yet another round
of thunderstorm activity over the CWA.  Unidirectional flow
parallel to the surface boundary may create a substantial heavy
rain threat heading into Friday across Missouri and southeast
Kansas.

High pressure will finally sweep through the area by next weekend,
drying out the region and bringing a significant reduction in
humidity.

&&

.AVIATION...(For the 18Z TAFS through 18Z Tuesday Afternoon)
Issued at 1228 PM CDT MON MAY 27 2013

Ongoing weather will depart terminals before 19Z with VFR conditions
in its wake. Forecast uncertainty is high with regards to timing and
coverage of evening/overnight convection, with the most probable
window expected after 03-05Z through 13Z.

&&

.EAX WATCHES/WARNINGS/ADVISORIES...
KS...NONE.
MO...NONE.
&&

UPDATE...Cutter
SHORT TERM...Hawblitzel
LONG TERM...Dux
AVIATION...Blair

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
112 PM CDT MON MAY 27 2013

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-281115-
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-
112 PM CDT MON MAY 27 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

LINGERING THUNDERSTORM ACTIVITY ACROSS AREAS FROM EAST CENTRAL KANSAS
INTO CENTRAL MISSOURI WILL SLOWLY CLEAR CENTRAL MISSOURI THIS
AFTERNOON. NO SEVERE THUNDERSTORM ACTIVITY IS EXPECTED FROM THESE
LEFT OVER STORMS.

HOWEVER...ADDITIONAL THUNDERSTORMS ARE POSSIBLE THIS EVENING AND OVERNIGHT
ACROSS THE ENTIRE OUTLOOK AREA. STORMS ARE EXPECTED TO INITIATE IN
SOUTH CENTRAL TO SOUTHEAST NEBRASKA LATE THIS AFTERNOON AND THIS
EVENING...AFTER WHICH THEY WILL BEGIN SHIFTING EAST INTO NORTHEAST
KANSAS AND NORTHWEST MISSOURI. THESE STORMS WILL EVENTUALLY SPREAD
ACROSS THE ENTIRE OUTLOOK AREA OVERNIGHT...THOUGH THE STRONGEST
STORM...WHICH MAY BE ABLE TO PRODUCE LARGE HAIL AND DAMAGING
WINDS...WILL BE LOCATED NORTH OF A KANSAS CITY TO KIRKSVILLE LINE. LARGE
HAIL AND DAMAGING WINDS WILL BE THE PRIMARY THREATS ASSOCIATED WITH
THIS EVENINGS STORMS. ADDITIONALLY...TORRENTIAL RAIN WILL ACCOMPANY
MANY OF THESE STRONG STORMS...POSSIBLY LEADING TO LOCAL FLOODING
ISSUES AS WELL AS EXACERBATING ONGOING FLOODING ALONG AREA
RIVERS...STREAMS...AND CREEKS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A FEW THUNDERSTORMS ARE POSSIBLE TUESDAY AND TUESDAY
NIGHT...ESPECIALLY ACROSS NORTHWEST MISSOURI AND NORTHEAST KANSAS.
THE THREAT FOR SEVERE THUNDERSTORMS APPEARS LOW AT THIS TIME.

MULTIPLE ROUNDS OF THUNDERSTORMS ARE EXPECTED LATE WEDNESDAY NIGHT
THROUGH FRIDAY NIGHT. SEVERAL PERIODS OF STRONG OR SEVERE
THUNDERSTORMS ARE POSSIBLE THROUGH THIS TIME. IN ADDITION...THE
POTENTIAL EXISTS FOR WIDESPREAD HEAVY RAINFALL WHICH COULD LEAD TO
FLOODING CONCERNS LATER THIS WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING ACROSS NORTHERN MISSOURI
AND NORTHEAST KANSAS.

CUTTER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
927 AM CDT MON MAY 27 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 AM     HEAVY RAIN       WINSTON                 39.87N 94.14W
05/27/2013  M2.50 INCH       DAVIESS            MO   AMATEUR RADIO

            2.5 INCHES OF RAIN IN 45 MINUTES BETWEEN 715 TO 800 AM

&&

SBLAIR

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
938 AM CDT MON MAY 27 2013

MOZ031-039-271515-
CARROLL MO-SALINE MO-
938 AM CDT MON MAY 27 2013

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SALINE AND SOUTHEASTERN
CARROLL COUNTIES UNTIL 1015 AM CDT...

AT 934 AM CDT...LOCAL LAW ENFORCEMENT REPORTED STRONG THUNDERSTORMS
ALONG A LINE EXTENDING FROM 7 MILES NORTH OF MALTA BEND TO
BLACKBURN...AND MOVING SOUTHEAST AT 25 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  MARSHALL...SLATER...MALTA BEND AND MOUNT LEONARD.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

LAT...LON 3899 9327 3919 9349 3922 9348 3935 9337
      3921 9299
TIME...MOT...LOC 1438Z 303DEG 21KT 3927 9329 3914 9344

CUTTER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1204 PM CDT MON MAY 27 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 PM     HEAVY RAIN       N PLEASANT HILL         38.80N 94.27W
05/27/2013  M2.00 INCH       CASS               MO   OFFICIAL NWS OBS

            TWO INCHES OF RAIN DURING THE PAST TWO HOURS...ENDING AT
            12 PM CDT

&&

SBLAIR

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1210 PM CDT MON MAY 27 2013

MOZ044-045-054-271745-
HENRY MO-JOHNSON MO-PETTIS MO-
1210 PM CDT MON MAY 27 2013

...SIGNIFICANT WEATHER ADVISORY FOR PETTIS COUNTY IN CENTRAL
MISSOURI...AND EASTERN JOHNSON AND NORTHEASTERN HENRY COUNTIES IN
WEST CENTRAL MISSOURI UNTIL 1245 PM CDT...

AT 1209 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM LA MONTE TO WHITEMAN
AIR FORCE BASE TO LEETON...AND MOVING EAST AT 30 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  WINDSOR...SEDALIA...LA MONTE...HOUSTONIA...GREEN RIDGE...
  HUGHESVILLE AND SEDALIA MEMORIAL ARPT.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

LAT...LON 3854 9386 3870 9362 3892 9353 3893 9305
      3868 9314 3853 9332
TIME...MOT...LOC 1710Z 275DEG 27KT 3882 9345 3868 9351
          3857 9366

CUTTER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1235 PM CDT MON MAY 27 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1205 PM     HEAVY RAIN       BATES CITY              39.01N 94.07W
05/27/2013  M2.75 INCH       LAFAYETTE          MO   TRAINED SPOTTER

            RAINFALL FROM LATE THIS MORNING

&&

SBLAIR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
133 PM CDT MON MAY 27 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0545 AM     TSTM WND DMG     3 S KING CITY           40.01N 94.52W
05/27/2013                   DEKALB             MO   EMERGENCY MNGR

            GRAIN BIN AND SHED NEAR US 169 HWY WERE DAMAGED FROM HIGH
            WINDS. TIME ESTIMATED FROM RADAR.

&&

SBLAIR