Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 343, NWS Kansas City, MO

September 9, 2011Clay County, Clinton County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Sep 9, 2011, 3:30 PM CDT for Clay County, Clinton County, Missouri. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 9, 2011, 3:30 PM CDT (20:30 UTC)
Expired: Sep 9, 2011, 3:54 PM CDT
In force: 24 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Clay County, MO, Clinton County, MO

The radar

The Pleasant Hill radar (KEAX), 57 km from the middle of the area, began a volume at 20:32 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 8.5 hours before the alert went out and 112 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 44 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 1090 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

711 
WUUS53 KEAX 092030
SVREAX
MOC047-049-092115-
/O.NEW.KEAX.SV.W.0343.110909T2030Z-110909T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
330 PM CDT FRI SEP 9 2011

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAY COUNTY IN WEST CENTRAL MISSOURI...
  SOUTHERN CLINTON COUNTY IN NORTHWEST MISSOURI...

* UNTIL 415 PM CDT

* AT 327 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH...AND QUARTER SIZE HAIL.  THIS STORM WAS LOCATED NEAR
  PLATTSBURG...AND MOVING SOUTH AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  KEARNEY...SMITHVILLE...LIBERTY...CLAYCOMO...HOLT...TRIMBLE...
  GLENAIRE...PLEASANT VALLEY...MISSOURI CITY...PRATHERSVILLE AND
  MOSBY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3959 9452 3955 9424 3923 9428 3924 9429
      3923 9431 3918 9434 3919 9439 3920 9439
      3919 9441 3921 9460 3935 9460
TIME...MOT...LOC 2030Z 010DEG 16KT 3951 9442
WIND...HAIL 60MPH 1.00IN

$$

SF

1 follow-up statement

984 
WWUS53 KEAX 092054
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
354 PM CDT FRI SEP 9 2011

MOC047-049-092104-
/O.CAN.KEAX.SV.W.0343.000000T0000Z-110909T2115Z/
CLAY MO-CLINTON MO-
354 PM CDT FRI SEP 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CLINTON AND CLAY
COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 3959 9452 3955 9424 3923 9428 3924 9429
      3923 9431 3918 9434 3919 9439 3920 9439
      3919 9441 3921 9460 3935 9460
TIME...MOT...LOC 2054Z 010DEG 16KT 3940 9444

$$

SF

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Kansas City, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 9, 3:26 PM CDT, 4 minutes earlier.

Area forecast discussion, Sep 9, 3:26 PM CDT, 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
326 PM CDT FRI SEP 9 2011

.DISCUSSION...

MAIN CHALLENGES FOR THIS FORECAST FOCUS ON CONVECTIVE CHANCES LATER
THIS AFTERNOON/THIS EVENING AND THEN AGAIN ON SATURDAY.

REST OF THIS AFTERNOON/THIS EVENING INTO SATURDAY:

THE THE CENTER OF THE UPPER LOW CAUSING OUR WEATHER IS STILL WELL
EAST IN CENTRAL/SOUTHERN ILLINOIS. HOWEVER MODEST DIURNAL HEATING
HAS RESULTING IN CAPE VALUES AROUND 1000 J/KG. ALSO...A FAIRLY
STRONG SHORTWAVE/PV ANOMALY IN IOWA...BETWEEN THE UPPER LOW AND THE
UPPER RIDGE ACROSS THE NORTHERN PLAINS HAS LED TO A BIT OF REVERSE
FLOWING JET STREAK WITH PARTS OF NORTHERN MISSOURI IN AN ENHANCED
REGION OF DIFFLUENCE ASSOCIATED WITH WHAT SHOULD BE LEFT FRONT QUAD
OF THAT JET STREAK. THE SLIGHTLY ENHANCED SHEAR IN CONJUNCTION WITH
SOME STRONG LOW LEVEL LAPSE RATES HAS LED TO STRONGER THUNDERSTORMS
ACROSS THE REGION. SOME THESE HAVE SHOW RECENT SIGNS OF HIGH WINDS
LIKELY OWING TO THE STEEP LOW LEVEL LAPSE RATES AND HIGH
PRECIPITATION LOADING IN THE LOW LEVELS OF THE STORMS. THE STORMS
SHOULD BE MORE DIURNALLY DRIVEN AND THINK THAT AS SUNSET APPROACHES
AND PASSES COVERAGE AND INTENSITY WILL DECREASE...ALTHOUGH LIGHT
SHOWER ACTIVITY MAY PERSIST OVERNIGHT.

THE PATTERN LOOKS SIMILAR FOR SATURDAY WITH THE STRONG WINDS ALOFT A
BIT WEAKER AND SHIFTED TO THE SOUTH. SO THINK SOMETHING SIMILAR WILL
OCCUR SATURDAY AFTERNOON BUT PERHAPS SHIFTED A BIT SOUTHWARD AND
MAINLY IMPACTING THE SOUTHERN HALF OF THE FORECAST AREA.

SUNDAY - MONDAY:

THE UPPER LOW WILL SHIFT TO THE SOUTHEAST AS SHORTWAVE RIDGING
BUILDS INTO THE THE REGION. THIS UPPER RIDGING WILL ALLOW FOR A
DECENT WARMING TREND WITH TEMPERATURES WARMING TO THE UPPER 80S BY
TUESDAY. THIS WARMING TREND WILL OCCUR AHEAD OF SHORTWAVE MOVING
THROUGH THE CENTRAL/NORTHERN PLAINS AND PERSISTENT SOUTHWESTERLY
FLOW AHEAD OF THE WAVE WILL KEEP OVERNIGHT TEMPERATURES SUNDAY INTO
MONDAY SEASONABLY WARM AS WELL. OVERNIGHT LOWS WILL BE IN THE LOWER
60S FOR MOST LOCATIONS.

TUESDAY - SATURDAY:

THE COLD FRONT ASSOCIATED WITH THIS SHORTWAVE IS EXPECTED TO MOVE
THROUGH THE REGION TUESDAY. WHILE CONFIDENCE IS STILL FAIRLY LOW
THAT ANY PRECIPITATION WILL OCCUR ALONG/BEHIND THE FRONT...HAVE KEPT
SLIGHT CHANCE POPS GOING AT THIS TIME DURING THE DAY TUESDAY. MODELS
SHOW A COOLER AND DRIER AIRMASS MOVING IN BEHIND THE FRONT WITH
CANADIAN HIGH PRESSURE SETTLING INTO THE NORTHERN PLAINS AND UPPER
MIDWEST. THIS COOLER AND DRIER AIR SHOULD PRECLUDE ANY ADDITIONAL
CHANCES OF PRECIPITATION THROUGH THE REMAINDER OF THE FORECAST SO
HAVE REMOVED THE LOW POPS THAT WERE INITIALIZED. THIS AIRMASS MAY
ALSO MAKE FOR A VERY CHILLY END TO NEXT WEEK WITH SOME AREAS SEEING
LOWS POSSIBLY IN THE UPPER 30S. THESE TEMPERATURES SHOULD BE CONFINED
TO NORTHERN MISSOURI...CLOSER TO THE CENTER OF THE SURFACE HIGH BUT
THE ENTIRE REGION SHOULD SEE COOLER THAN NORMAL TEMPERATURES.

CDB

&&

.AVIATION...

FOR THE 18Z TAFS...LATEST RADAR RETURNS SHOWING AN ISOLATED SHOWER
FORMING NORTHEAST OF KANSAS CITY. EXPECT MORE SHOWERS TO DEVELOP AS
THE AFTERNOON PROGRESSES. LATEST MESOANALYSIS SHOWS ABOUT 1000 J/KG
MUCAPE ACROSS NORTHERN MISSOURI SO EMBEDDED THUNDERSTORMS ARE
POSSIBLE. THE BEST COVERAGE OF ACTIVITY SHOULD BE EAST OF THE
TERMINALS SO WILL CONTINUE WITH GOING FORECAST OF SHOWERS WITH ONLY
CB MENTION. THIS ACTIVITY SHOULD MOSTLY BE DIURNALLY DRIVEN SO
COVERAGE AND INTENSITY ARE EXPECTED TO DECREASE WITH SUNSET. SATURDAY
WILL LIKELY BE A REPEAT OF TODAY BUT WITH PERHAPS A BIT MORE COVERAGE
OF PRECIPITATION. SINCE ACTIVITY SHOULD BE MAINLY DURING THE
AFTERNOON WILL KEEP MENTION OUT OF THE FORECAST AT THIS TIME. ASIDE
FROM THE SHOWER/ISOLATED STORM CHANCES VFR CONDITIONS ARE EXPECTED
THROUGH MUCH OF THE TAF VALID PERIOD WITH NORTHWESTERLY WINDS
BECOMING MORE NORTHERLY TONIGHT.

CDB

&&

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

Hazardous weather outlook, Sep 9, 12:55 PM CDT, 2 hours 35 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1255 PM CDT FRI SEP 9 2011

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-101215-
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-
1255 PM CDT FRI SEP 9 2011

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

ISOLATED THUNDERSTORMS WILL CONTINUE THIS AFTERNOON. NO SEVERE WEATHER
IS EXPECTED.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

ISOLATED THUNDERSTORMS ARE POSSIBLE SATURDAY AFTERNOON. NO HAZARDOUS
WEATHER IS EXPECTED WITH THIS ACTIVITY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

CDB

In the hours before

Special weather statement, Sep 9, 2:39 PM CDT, 51 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
239 PM CDT FRI SEP 9 2011

MOZ037-043-044-092030-
CASS MO-JACKSON MO-JOHNSON MO-
239 PM CDT FRI SEP 9 2011

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JOHNSON...EASTERN
JACKSON AND NORTHEASTERN CASS COUNTIES IN WEST CENTRAL MISSOURI UNTIL
330 PM CDT...

AT 237 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM LAKE TAPAWINGO TO
LONE JACK...AND MOVING SOUTHWEST AT 25 MPH.

WIND GUSTS UP TO 45 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH
HEAVY RAIN.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  LAKE LOTAWANA...LEE'S SUMMIT...GREENWOOD...PLEASANT HILL...
  RAYMORE...LONE JACK...LAKE WINNEBAGO...UNITY VILLAGE...STRASBURG
  AND GUNN CITY.

THIS WILL IMPACT THE FOLLOWING INTERSTATES...

  I-70 BETWEEN MILE MARKERS 13 AND 28.
  I-470 BETWEEN MILE MARKERS 6 AND 16.

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

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 3880 9451 3916 9436 3900 9411 3892 9411
      3891 9409 3864 9411
TIME...MOT...LOC 1939Z 024DEG 24KT 3904 9437 3888 9412

SF

Local storm report, Sep 9, 2:51 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
251 PM CDT FRI SEP 09 2011

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

0246 PM     TSTM WND DMG     BLUE SPRINGS            39.02N 94.28W
09/09/2011                   JACKSON            MO   LAW ENFORCEMENT

            POWER LINES AND TREES REPORTED DOWN, JUST WEST OF HIGHWAY
            7 ON HIGHWAY 40. THUNDERSTORM WIND GUSTS WERE ESTIMATED
            UP TO 60 MPH.

&&

GAMIS

Special weather statement, Sep 9, 2:53 PM CDT, 37 minutes before

SPECIAL WEATHER STATEMENT...UPDATE
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
253 PM CDT FRI SEP 9 2011

MOZ037-043-044-092030-
CASS MO-JACKSON MO-JOHNSON MO-
253 PM CDT FRI SEP 9 2011

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JOHNSON...EASTERN
JACKSON AND NORTHEASTERN CASS COUNTIES IN WEST CENTRAL MISSOURI UNTIL
330 PM CDT...

AT 252 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM SOUTHERN RAYTOWN TO LONE
JACK...AND MOVING SOUTHWEST AT 25 MPH.

WIND GUSTS UP TO 55 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH
PEA SIZED HAIL AND HEAVY RAIN.

AT 246 PM...BLUE SPRINGS POLICE REPORTED POWER LINES AND TREES DOWN
JUST WEST OF HIGHWAY 7 ON HIGHWAY 40.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  LAKE LOTAWANA...LEE'S SUMMIT...GREENWOOD...PLEASANT HILL...
  RAYMORE...LONE JACK...LAKE WINNEBAGO...UNITY VILLAGE...STRASBURG
  AND GUNN CITY.

THIS WILL IMPACT THE FOLLOWING INTERSTATES...

  I-70 BETWEEN MILE MARKERS 13 AND 28.
  I-470 BETWEEN MILE MARKERS 6 AND 16.

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

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 3880 9451 3916 9436 3900 9411 3892 9411
      3891 9409 3864 9411
TIME...MOT...LOC 1939Z 024DEG 24KT 3904 9437 3888 9412

SF

Special weather statement, Sep 9, 2:57 PM CDT, 33 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
257 PM CDT FRI SEP 9 2011

KSZ103-MOZ020-028-092045-
BUCHANAN MO-LEAVENWORTH KS-PLATTE MO-
257 PM CDT FRI SEP 9 2011

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PLATTE...SOUTHERN
BUCHANAN AND NORTHEASTERN LEAVENWORTH COUNTIES UNTIL 345 PM CDT...

AT 255 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR AGENCY...OR 10 MILES SOUTH OF ELWOOD...
MOVING SOUTH AT 25 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  WESTON...PLATTE CITY...LEAVENWORTH...DEARBORN...CAMDEN POINT...
  TRACY...FAUCETT...DE KALB...BEVERLY...HOOVER...EAST LEAVENWORTH...
  FORT LEAVENWORTH AND STILLINGS.

THIS WILL IMPACT THE FOLLOWING INTERSTATES...

  I-435 LOOP FROM MILE MARKERS 29 TO 35.
  I-29 BETWEEN MILE MARKERS 13 AND 43.

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

IN ADDITION...THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR
LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...
FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL
WEATHER SERVICE.

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 3931 9463 3931 9495 3971 9492 3971 9469
TIME...MOT...LOC 1957Z 359DEG 15KT 3961 9480

SF

Special weather statement, Sep 9, 3:09 PM CDT, 21 minutes before

SPECIAL WEATHER STATEMENT...UPDATE
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
309 PM CDT FRI SEP 9 2011

KSZ103-MOZ020-028-092045-
BUCHANAN MO-LEAVENWORTH KS-PLATTE MO-
309 PM CDT FRI SEP 9 2011

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PLATTE...SOUTHERN
BUCHANAN AND NORTHEASTERN LEAVENWORTH COUNTIES UNTIL 345 PM CDT...

AT 307 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR DEARBORN...OR 5 MILES NORTHWEST OF TIFFANY
SPRINGS...MOVING SOUTH AT 25 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  WESTON...PLATTE CITY...LEAVENWORTH...DEARBORN...CAMDEN POINT...
  TRACY...FAUCETT...DE KALB...BEVERLY...HOOVER...EAST LEAVENWORTH...
  FORT LEAVENWORTH AND STILLINGS.

THIS WILL IMPACT THE FOLLOWING INTERSTATES...

  I-435 LOOP FROM MILE MARKERS 29 TO 35.
  I-29 BETWEEN MILE MARKERS 13 AND 43.

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

IN ADDITION...THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR
LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...
FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL
WEATHER SERVICE.

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 3931 9463 3931 9495 3971 9492 3971 9469
TIME...MOT...LOC 1957Z 359DEG 15KT 3961 9480

SF

Special weather statement, Sep 9, 3:17 PM CDT, 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
317 PM CDT FRI SEP 9 2011

MOZ043-044-092100-
CASS MO-JOHNSON MO-
317 PM CDT FRI SEP 9 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN JOHNSON AND CASS
COUNTIES IN WEST CENTRAL MISSOURI UNTIL 400 PM CDT...

AT 314 PM CDT...STORM SPOTTERS REPORTED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM LAKE WINNEBAGO TO 5 MILES EAST OF EAST LYNNE...
AND MOVING SOUTH AT 25 MPH.

AT 305 PM CDT...AN AUTOMATED WIND SENSOR LOCATED IN LEES SUMMIT
REPORTED AN WIND GUST OF 53 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 55 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  RAYMORE...PECULIAR...GARDEN CITY...HARRISONVILLE...EAST LYNNE...
  CREIGHTON...FREEMAN...LA TOUR AND WEST LINE.

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

IN ADDITION...THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR
LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...
FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL
WEATHER SERVICE.

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 3862 9461 3884 9451 3884 9435 3868 9401
      3857 9403 3857 9406 3845 9407
TIME...MOT...LOC 2016Z 356DEG 24KT 3884 9442 3865 9413

SF

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 9, 2:15 PM CDT	Special Weather Statement	EAX	Lafayette	45 min
Sep 9, 2:39 PM CDT	Special Weather Statement	EAX	Jackson	51 min
Sep 9, 2:53 PM CDT	Special Weather Statement	EAX	Jackson	37 min
Sep 9, 2:57 PM CDT	Special Weather Statement	EAX	Buchanan, Platte	48 min
Sep 9, 3:09 PM CDT	Special Weather Statement	EAX	Buchanan, Platte	36 min
Sep 9, 3:17 PM CDT	Special Weather Statement	EAX	Cass	43 min
Sep 9, 3:53 PM CDT	Special Weather Statement	EAX	Clay, Platte	52 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.