Severe Thunderstorm Warning 105, NWS Kansas City, MO

779 
WWUS53 KEAX 040414
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1114 PM CDT MON SEP 3 2012

MOC025-040421-
/O.CAN.KEAX.SV.W.0105.000000T0000Z-120904T0430Z/
CALDWELL MO-
1114 PM CDT MON SEP 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CALDWELL COUNTY
IS CANCELLED...

ALTHOUGH HEAVY RAIN AND GUSTY WINDS WILL CONTINUE ACROSS SOUTHERN 
CALDWELL COUNTY THROUGH MIDNIGHT...THE MOST SEVERE PORTION OF THE 
STORM IS NOW EXPECTED TO REMAIN OVER NORTHEAST CLAY INTO ADJACENT 
NORTHWEST RAY COUNTY. 

LAT...LON 3949 9435 3952 9400 3952 9395 3938 9392
      3936 9443
TIME...MOT...LOC 0411Z 265DEG 20KT 3942 9430

$$

MOC047-049-177-040430-
/O.CON.KEAX.SV.W.0105.000000T0000Z-120904T0430Z/
CLAY MO-CLINTON MO-RAY MO-
1114 PM CDT MON SEP 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
RAY...SOUTHEASTERN CLINTON AND NORTHEASTERN CLAY COUNTIES UNTIL 1130
PM CDT...

AT 1109 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR HOLT...AND
MOVING EAST AT 25 MPH.

HAZARD...60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...MINOR TREE DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER
         BROKEN.

LOCATIONS IMPACTED INCLUDE...
LAWSON...EXCELSIOR ESTATES...ELMIRA AND KNOXVILLE.

THIS WILL IMPACT

 I-35 BETWEEN MILE MARKERS 26 AND 35.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3949 9435 3952 9400 3952 9395 3938 9392
      3936 9443
TIME...MOT...LOC 0411Z 265DEG 20KT 3942 9430

HAIL...<.75IN
WIND...60 MPH

$$

BOOKBINDER

002 
WWUS53 KEAX 040426
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1126 PM CDT MON SEP 3 2012

MOC047-049-177-040436-
/O.EXP.KEAX.SV.W.0105.000000T0000Z-120904T0430Z/
CLAY MO-CLINTON MO-RAY MO-
1126 PM CDT MON SEP 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN RAY...
SOUTHEASTERN CLINTON AND NORTHEASTERN CLAY COUNTIES WILL EXPIRE AT
1130 PM CDT...

THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE 
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY. 
HOWEVER HEAVY RAIN AND WIND GUSTS TO 40 MPH ARE STILL POSSIBLE WITH 
THESE THUNDERSTORMS.

LAT...LON 3949 9435 3952 9400 3952 9395 3938 9392
      3936 9443
TIME...MOT...LOC 0426Z 265DEG 20KT 3943 9419

$$

BOOKBINDER

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
745 PM CDT MON SEP 3 2012

.UPDATE...

Recent satellite imagery suggests the embedded mid level impulse
crossing through Nebraska/Kansas may be a bit more robust than
earlier anticipated. 00Z KTOP sounding shows that substantial
moistening in the 850-800mb layer has taken place over the past 12
hours with an appreciable increase in W/SW mid level flow in the
800-600mb layer averaging 25 knots. Despite the lack of robust
diurnally driven convection, elevated forcing for ascent looks more
than ample to drive an increase axis of convection from extreme SE
Nebraska southwest across northeast/east central Kansas early this
evening with MUCAPEs approaching 1000 J/kg. Precipitable water
values approaching 2" could yield some heavier rainfall rates, but
do not anticipate any concerns given the pulse/multi-cell nature to
the convection and an expected swift motion off to the northeast at
35-40 mph.

Have increased POPs over NE KS/NW MO this evening and further south
into MO after midnight assuming this activity gains some traction.
No strong/severe weather is expected. Aviation wise, will wait and
see if any lightning activity picks up before amending the TAFs, as
these elevated cells would otherwise provide VFR conditions with a
brief couple minute visibility reduction if a core crossed the
terminals.

Bookbinder

.DISCUSSION...

A rather hot and humid day across the region as temperatures have
climbed into the 90s in most locations.  The warmest airmass has
been confined across south central Kansas and Oklahoma where a
surface warm has formed just west of the CWA. Convergence along the
warm front has allowed a few isolated storms to develop. Given
building MLCAPE values approaching 1500-2000 J/KG in areas along and
west of the state line, couldn't rule out an isolated strong to
severe storm.

Concerns turn towards convective chances later tonight and through
Tuesday morning as shortwave energy crossing Colorado begins to
influence the airmass.  Moisture convergence on the nose of a
slightly increasing low level jet will begin to focus itself in
northeast Kansas and northern Missouri. Some uncertainty does
present itself with setup given meager moisture values and dry
airmass advecting in from the southwest.  However its possible that
activity that develops late this aftn and evening in convergence zone
under surface low near Salina to Topeka could sustain itself and
begin to propagate eastward into the overnight hours. Models remain
all over the place, and will continue to hold lower precipitation
chances.

Tuesday-Wednesday: Models have trended towards a dry forecast
through the daytime hours with temperatures warming significantly
over previous forecast.  Despite a fairly messy mid-level flow
pattern, low level moisture transport remains focused towards the
Western Plains, with soundings in the local area remaining capped
for much of the day.  850 mb temperatures in the mid-20s should
result in another day of middle 90s with a few upper 90s in southern
zones.

Another uncertain precipitation forecast.  With EML firmly
in place over the CWA best forcing for convection should remain
across western KS and central NE Tuesday afternoon along a cold front
pressing southeast. Convection developing along this boundary should
remain just west of the CWA as prevailing storm motion pushes
convection into Iowa. However will watch for the development of the
nocturnal LLJ which should provide enough support to develop
scattered convection over eastern KS and Missouri into Wednesday
night. Given the veered nature of the LLJ, current precipitation
chances are focused over the NW corner and then the southern zones.

The front will move through the area on Friday, albeit slower than
earlier projections.  This will result in a slight upwards tick in
temperatures over the southern zones. The best chance for convective
redevelopment appear to be focused over the Ozarks.

31

Medium Range (Thursday through Monday)...

Surface front will stall across the Ozarks on Thursday while
elevated boundary hangs back near and north of I-70. These
boundaries will begin to lift to the north Thursday and Thursday
evening ahead of a broad upper trough dropping into the Northern
Plains. Increasing southerly flow interacting with this baroclinic
zone across the CWA will result in broad isentropic ascent and a
likely set up for rain and elevated thunder, particularly Thursday
night. Could see rain and a few storms linger into Friday as the
upper wave deepens into the Central Plains sending the boundary back
southward across the forecast area. Amplified northerly flow behind
the front will bring dry weather and cooler temps for the weekend.

Hawblitzel

&&

.AVIATION...

For the 00Z TAFs, clear skies and southeast winds of 8-10 knots
should continue this evening with a gradual increase in mid cloud.
Thus far, little more than widely scattered showers have developed
along a diffuse frontal zone to the northwest. The NAM seems overly
aggressive with respect to convection developing this
evening/overnight and prefer the HRRR representation which has more
closely followed reality to this point. Thus, while thunderstorms
could impact the terminals later tonight, the coverage and intensity
at this point would not warrant inclusion in the TAFs. So will
maintain VFR conditions and southeast winds through the period,
although a trend toward light east winds is expected on Tuesday.

At STJ, some MVFR light fog could develop late tonight, but
radiational cooling could be restricted by cloud cover to some
degree.

Bookbinder

&&

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

WFO EAX

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
813 PM CDT MON SEP 3 2012

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-041100-
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-
813 PM CDT MON SEP 3 2012

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

.DAY ONE...TONIGHT

CONDITIONS HAVE BECOME MORE FAVORABLE FOR THUNDERSTORMS
OVERNIGHT...ESPECIALLY ACROSS NORTHWEST MISSOURI AND ADJACENT
NORTHEAST KANSAS. THUNDERSTORMS WILL DEVELOP OVER FAR NORTHWEST
MISSOURI...NORTH OF ST. JOSEPH THROUGH 10 PM...AND THEN GRADUALLY
CROSS THE STATE LINE FURTHER SOUTH LATER THIS EVENING AND OVERNIGHT.
BRIEF DOWNPOURS AND OCCASIONAL LIGHTNING WILL BE THE PRIMARY
THREATS...ALTHOUGH SOME SMALL HAIL CANNOT BE RULED OUT WITH THE
STRONGER STORMS. SEVERE WEATHER IS PRESENTLY NOT ANTICIPATED. DUE TO
THE FAST NATURE OF THESE STORMS...HEAVIER DOWNPOURS SHOULD BE SHORT
LIVED IN ANY LOCATION.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ANY LINGERING THUNDERSTORMS WILL DISSIPATE EARLY TUESDAY
MORNING...WITH HOT AND HUMID CONDITIONS RETURNING ONCE AGAIN. HEAT
INDEX VALUES ON TUESDAY AFTERNOON MAY AGAIN EXCEED 100 DEGREES IN
MANY AREAS. PERSONS SHOULD TAKE PRECAUTIONS TO PREVENT HEAT RELATED
ILLNESSES.

SCATTERED THUNDERSTORMS WILL AGAIN BE POSSIBLE LATE TUESDAY EVENING
INTO WEDNESDAY MORNING AS A COLD FRONT REACHES THE AREA. AT THIS TIME
THE THREAT FOR WIDESPREAD SEVERE WEATHER REMAINS LOW.

MORE ORGANIZED THUNDERSTORMS ARE EXPECTED THURSDAY INTO FRIDAY ALONG
WITH THE POTENTIAL FOR HEAVY RAIN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

BOOKBINDER

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
910 PM CDT MON SEP 3 2012

KSZ025-102-040300-
ATCHISON KS-DONIPHAN KS-
910 PM CDT MON SEP 3 2012

...SIGNIFICANT WEATHER ADVISORY FOR DONIPHAN AND NORTHEASTERN
ATCHISON COUNTIES UNTIL 1000 PM CDT...

AT 906 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR DENTON...OR 7 MILES SOUTH OF HIGHLAND...
MOVING SOUTHEAST AT 20 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  TROY...BENDENA AND DONIPHAN.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3988 9516 3986 9506 3989 9493 3965 9504
      3964 9505 3959 9507 3960 9534 3978 9534
TIME...MOT...LOC 0210Z 302DEG 16KT 3975 9521

BOOKBINDER

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
958 PM CDT MON SEP 3 2012

KSZ025-103-MOZ020-028-040330-
ATCHISON KS-BUCHANAN MO-LEAVENWORTH KS-PLATTE MO-
958 PM CDT MON SEP 3 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN PLATTE...BUCHANAN...
SOUTHEASTERN ATCHISON AND NORTHEASTERN LEAVENWORTH COUNTIES UNTIL
1030 PM CDT...

AT 951 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A CLUSTER OF STRONG THUNDERSTORM NEAR RUSHVILLE...OR 9 MILES EAST OF
ATCHISON...MOVING SOUTHEAST AT 30 MPH. STRONG WIND GUSTS OF 40 TO 50
MPH WERE LOCATED ALONG AND EVEN AHEAD OF THE LEADING EDGE OF THESE
STORMS...AND SOME PORTIONS OF PLATTE COUNTY MAY EXPERIENCE STRONG
WINDS WITHOUT ANY RAIN OR THUNDER IN THE NEXT 30 MINUTES.

WITHIN THE STORMS THEMSELVES...TORRENTIAL RAINFALL AND FREQUENT
DANGEROUS LIGHTNING CAN BE EXPECTED.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  WESTON...LEAVENWORTH...PLATTE CITY...AGENCY...DEARBORN...CAMDEN
  POINT...TRACY...EDGERTON...FAUCETT...FORT LEAVENWORTH...BEVERLY...
  STILLINGS AND RIDGELY.

THIS WILL IMPACT

 I-29 BETWEEN MILE MARKERS 20 AND 45.

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 3977 9473 3949 9460 3947 9460 3926 9497
      3957 9517
TIME...MOT...LOC 0257Z 310DEG 27KT 3953 9491

BOOKBINDER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1040 PM CDT MON SEP 03 2012

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

1037 PM     TSTM WND GST     KCI AIRPORT             39.30N 94.72W
09/03/2012  M60 MPH          PLATTE             MO   ASOS

&&

DDEROCHE

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1050 PM CDT MON SEP 3 2012

MOZ022-029-030-037-040415-
CALDWELL MO-CLAY MO-JACKSON MO-RAY MO-
1050 PM CDT MON SEP 3 2012

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN RAY...NORTHEASTERN
JACKSON...EXTREME EASTERN CLAY AND SOUTHWESTERN CALDWELL COUNTIES
UNTIL 1115 PM CDT...

AT 1048 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A LINE OF SEVERE THUNDERSTORMS ACROSS CLAY COUNTY. SOME WEAKENING IS
EXPECTED AS THESE STORMS MOVE EAST...BUT THEY WILL STILL BE CAPABLE
OF PRODUCING 40 TO 50 MPH WIND GUSTS AND SMALL HAIL AS THEY APPROACH
LAWSON...EXCELSIOR SPRINGS...MISSOURI CITY...COURTNEY AND INTO RAY
COUNTY AFTER 11 PM.

LAT...LON 3928 9426 3946 9421 3956 9420 3957 9397
      3936 9397 3923 9400 3914 9410 3914 9411
      3913 9411 3914 9440
TIME...MOT...LOC 0348Z 286DEG 27KT 3956 9433 3944 9426
          3929 9430 3920 9438

BOOKBINDER

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1056 PM CDT MON SEP 3 2012

KSZ103-MOZ028-040430-
LEAVENWORTH KS-PLATTE MO-
1056 PM CDT MON SEP 3 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN PLATTE AND EASTERN
LEAVENWORTH COUNTIES UNTIL 1130 PM CDT...

AT 1052 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM NEAR LANSING AND LEAVENWORTH...MOVING EAST AT
35 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  WEATHERBY LAKE...FERRELVIEW...PLATTE WOODS...LAKE
  WAUKOMIS...EAST   LEAVENWORTH...FARLEY...WALDRON AND KANSAS CITY
  INTERNATIONAL AIRPORT.

THIS WILL IMPACT THE FOLLOWING INTERSTATES...

  I-435 LOOP FROM MILE MARKERS 21 TO 37.
  I-29 BETWEEN MILE MARKERS 5 AND 17.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3937 9500 3935 9464 3920 9463 3920 9483
      3920 9490 3919 9501
TIME...MOT...LOC 0356Z 281DEG 31KT 3926 9490

BOOKBINDER