Severe Thunderstorm Warning 378, NWS Springfield, MO

897 
WWUS53 KSGF 062202
SVSSGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
502 PM CDT WED JUL 6 2011

MOC065-203-062210-
/O.CAN.KSGF.SV.W.0378.000000T0000Z-110706T2230Z/
DENT MO-SHANNON MO-
502 PM CDT WED JUL 6 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN SHANNON AND SOUTHERN
DENT COUNTIES IS CANCELLED...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER
SEVERE...THUS THE WARNING HAS BEEN CANCELLED. HOWEVER...WIND GUSTS 
OVER 40 MPH...FREQUENT LIGHTNING STRIKES...AND TORRENTIAL RAINFALL 
WILL REMAIN POSSIBLE ACROSS NORTHERN SHANNON AND SOUTHERN DENT 
COUNTIES THROUGH 530 PM.

LAT...LON 3723 9165 3752 9165 3750 9129 3722 9123
TIME...MOT...LOC 2200Z 017DEG 6KT 3738 9144

$$

SCHAUMANN

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPRINGFIELD MO
314 PM CDT WED JUL 6 2011

.DISCUSSION...

THE MAIN FORECAST CONCERN THROUGH THE END OF THE WEEK WILL BE
CONVECTIVE POTENTIAL AS AFTERNOON PULSE TYPE THUNDERSTORMS AND MCS
ACTIVITY WILL BOTH BE IN PLAY. ATTENTION THEN SHIFTS TO
TEMPERATURES FROM THIS WEEKEND INTO AT LEAST EARLY NEXT WEEK AS A
SUMMERTIME RIDGE BUILDS BACK OVERHEAD.

TONIGHT...PULSE TYPE THUNDERSTORMS WILL BE ONGOING...WITH THE BEST
COVERAGE ACROSS THE CENTRAL AND EASTERN MISSOURI OZARKS. THE MAIN
FOCUSING MECHANISM FOR THIS ACTIVITY WILL INITIALLY BE A LEFT OVER
MESOSCALE CONVECTIVE VORTICITY MAXIMA DRIFTING SOUTHEAST ACROSS THE
AREA. OUTFLOW WILL THEN COME INTO PLAY...WITH PREFERENTIAL
GROWTH/NEW DEVELOPMENT ON THE SOUTHEAST FLANK OF DECAYING STORMS.
WILL MAINTAIN AN ELEVATED SEVERE THREAT WITH FORECAST SOUNDINGS
MAINTAINING HYBRID/WET MICROBURST SIGNATURES. COULD ALSO SEE SOME
SEVERE HAIL WITH THE STRONGEST OF CORES. WE MAY SEE A LULL IN THE
ACTION FROM LATE THIS EVENING INTO THE EARLY OVERNIGHT PERIOD.
HOWEVER...INDICATIONS ARE THAT AN MCS WILL DEVELOP ACROSS THE
CENTRAL HIGH PLAINS STARTING LATE THIS EVENING. WIND FIELDS WILL
SUPPORT THIS MCS SLIDING SOUTHEAST INTO WESTERN MISSOURI EITHER
LATE TONIGHT OR EARLY THURSDAY MORNING.

THURSDAY...WE WILL HAVE TO DEAL WITH THE REMNANTS OF THAT MCS AT
LEAST THURSDAY MORNING. MEANWHILE...A FRONTAL BOUNDARY WILL SLOWLY
DRIFT NORTH INTO THE OZARKS THROUGHOUT THE DAY. ADDITIONAL
CONVECTION WILL THEREFORE BE POSSIBLE NOT ONLY ALONG THIS
FRONT...BUT ALSO ANY REMAINING OUTFLOW BOUNDARIES. KEPT POPS IN THE
LIKELY CATEGORY ACROSS MOST OF THE AREA. FORECAST SOUNDINGS AGAIN
INDICATE GOOD THETA-E DIFFERENTIAL IN THE LOW LEVELS...SO THINK
DOWNBURST POTENTIAL WILL BE THERE. ENOUGH INSTABILITY WILL ALSO
EXIST FOR LARGE HAIL. THE CLOUDS AND CONVECTION WILL KEEP HIGH
TEMPERATURES DOWN IN THE 80S FOR THE MOST PART.

THURSDAY NIGHT THROUGH SATURDAY...CONVECTIVE CHANCES BECOME A BIT
MORE MUDDLED AS THE EVENTUAL LOCATION OF THAT FRONT IS UNCLEAR AT
THIS TIME. MODELS DO INDICATE AT LEAST SOME SEMBLANCE OF A VEERING
LOW LEVEL JET INTERACTING WITH THE FRONT BOTH THURSDAY NIGHT AND
FRIDAY NIGHT. WE COULD THEREFORE SEE ELEVATED ACTIVITY. MAY ALSO SEE
SOME PULSERS DURING THE DAY ON FRIDAY. MEANWHILE...THAT FRONT WILL
BEGIN TO SHIFT NORTH ACROSS MISSOURI LATER FRIDAY NIGHT AND
SATURDAY. KEPT POPS AROUND 10 PERCENT FOR NOW ON SATURDAY...BUT WE
WILL HAVE TO WATCH AT LEAST THE EASTERN OZARKS FOR SOME PULSERS.
MEANWHILE...THAT UPPER LEVEL HIGH WILL BEGIN TO BUILD BACK IN FROM
THE WEST. THIS WILL LEAD TO YET ANOTHER RETURN TO ABOVE NORMAL
TEMPERATURES BY SATURDAY.

EARLY NEXT WEEK...MEDIUM RANGE MODELS SHIFT THE CORE OF AN UPPER
LEVEL HIGH DIRECTLY OVER THE OZARKS. THIS WILL LEAD TO ABOVE
NORMAL TEMPERATURES AND AFTERNOON HEAT INDICES BACK INTO THE LOWER
TRIPLE DIGITS OVER MANY AREAS. THINK MOST IF NOT ALL THUNDERSTORM
ACTIVITY WILL BE SUPPRESSED GIVEN THE POSITION OF THE HIGH. MODELS
DO BEGIN TO SHIFT THAT HIGH OFF TO THE EAST BY MIDWEEK. THIS MAY
CRACK THE DOOR BACK OPEN FOR CONVECTIVE CHANCES BY THE MIDDLE OF
NEXT WEEK.

SCHAUMANN

&&

.AVIATION...

FOR THE 18Z TAFS...A WEAK UPPER LEVEL STORM SYSTEM WILL MOVE
THROUGH THE REGION THIS AFTERNOON AND BRING THE POTENTIAL FOR
SHOWERS AND THUNDERSTORMS ONCE AGAIN TO AREA TERMINALS. COVERAGE
WILL BE LIMITED AND HAVE USE VCTS OR CB WHERE NEEDED. EXPECT VFR
CONDITIONS TO BE THE PREVAILING CONDITION THOUGH MVFR WHERE/WHEN
STORMS IMPACT THE TERMINALS. SOME IMPROVEMENT IS EXPECTED DURING
THE LATE EVENING WITH ADDITIONAL STORMS POSSIBLE EARLY THURSDAY
MORNING.

HATCH

&&

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

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE SPRINGFIELD MO
247 PM CDT WED JUL 6 2011

KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-072000-
BOURBON-CRAWFORD-CHEROKEE-BENTON-MORGAN-MILLER-MARIES-VERNON-
ST. CLAIR-HICKORY-CAMDEN-PULASKI-PHELPS-BARTON-CEDAR-POLK-DALLAS-
LACLEDE-TEXAS-DENT-JASPER-DADE-GREENE-WEBSTER-WRIGHT-NEWTON-
LAWRENCE-CHRISTIAN-DOUGLAS-HOWELL-SHANNON-MCDONALD-BARRY-STONE-
TANEY-OZARK-OREGON-
247 PM CDT WED JUL 6 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE MISSOURI
OZARKS AND EXTREME SOUTHEAST KANSAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

  THE HAZARDOUS WEATHER RISK LEVEL IS...ELEVATED.

WEATHER HAZARDS EXPECTED...

  ELEVATED HAIL RISK.
  ELEVATED THUNDERSTORM WIND DAMAGE RISK.
  ELEVATED LIGHTNING RISK.
  LIMITED TO LOCALLY ELEVATED EXCESSIVE HEAT RISK.

DISCUSSION...

ISOLATED TO SCATTERED THUNDERSTORMS WILL PERSIST INTO THIS
EVENING ACROSS THE OUTLOOK AREA. ENOUGH INSTABILITY IS IN PLACE
FOR AN ELEVATED SEVERE STORM THREAT...WITH DOWNBURST WIND GUSTS TO
60 MPH AND HAIL TO THE SIZE OF QUARTERS BEING THE MAIN SEVERE
THREATS. FREQUENT LIGHTNING STRIKES AND BRIEF TORRENTIAL RAINFALL
CAN ALSO BE EXPECTED WITH THESE STORMS.

A CLUSTER OF THUNDERSTORMS IS THEN EXPECTED TO PUSH INTO
SOUTHEAST KANSAS AND WESTERN MISSOURI LATE TONIGHT. A FEW OF
THESE STORMS MAY ALSO CONTAIN HAIL TO THE SIZE OF QUARTERS AND
WIND GUSTS OVER 50 MPH. FREQUENT LIGHTNING STRIKES AND BRIEF HEAVY
RAINFALL CAN ALSO BE EXPECTED WITH THIS ACTIVITY.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

ADDITIONAL THUNDERSTORMS ARE THEN EXPECTED ON THURSDAY AS THAT
CLUSTER OF STORMS CONTINUES TO PUSH THROUGH THE OUTLOOK AREA.
ADDITIONALLY...A FRONTAL BOUNDARY WILL ALSO PUSH SOUTH INTO THE
AREA...WHICH MAY LEAD TO ADDITIONAL THUNDERSTORM DEVELOPMENT
THROUGHOUT THE DAY ON THURSDAY. DAMAGING WINDS GUSTS TO 60 MPH
AND HAIL TO THE SIZE OF QUARTERS WILL AGAIN BE POSSIBLE WITH THIS
ACTIVITY.

ADDITIONAL ISOLATED TO SCATTERED THUNDERSTORMS WILL THEN BE
POSSIBLE FROM THURSDAY NIGHT INTO FRIDAY NIGHT AS THAT FRONTAL
BOUNDARY REMAINS DRAPED NEAR OR JUST SOUTH OF THE OUTLOOK AREA.

AFTER A BRIEF BREAK IN THE HEAT DURING THE MID TO LATE PORTION OF
THIS WEEK...ABOVE AVERAGE TEMPERATURES WILL ONCE AGAIN SPREAD
OVER THE REGION THIS WEEKEND. HEAT INDEX VALUES RANGING BETWEEN
100 AND 105 DEGREES WILL OCCUR BOTH SATURDAY AND SUNDAY
AFTERNOON.

ANOTHER HEAT WAVE IS FORECAST TO IMPACT THE REGION MUCH OF NEXT
WEEK. HEAT INDICES ARE EXPECTED TO RANGE FROM 100 TO 107 DEGREES
ON AN AFTERNOON BASIS.

THERE IS THEN A SLIGHT CHANCE FOR THUNDERSTORMS AROUND THE MIDDLE
OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

  SPOTTER ACTIVATION MAY BE NEEDED ACROSS THE OUTLOOK AREA INTO
  THIS EVENING. ACTIVATION WILL THEN BE POSSIBLE LATE TONIGHT
  ACROSS EXTREME SOUTHEAST KANSAS AND WESTERN MISSOURI.

&&

THIS PRODUCT IS NOW AVAILABLE IN GRAPHICAL FORMAT...ALONG WITH
OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION...AT
HTTP://WWW.CRH.NOAA.GOV/SGF(ALL LOWERCASE)

SCHAUMANN

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
303 PM CDT WED JUL 6 2011

MOZ081-092-062030-
LACLEDE MO-WRIGHT MO-
303 PM CDT WED JUL 6 2011

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN WRIGHT AND SOUTHEASTERN
LACLEDE COUNTIES UNTIL 330 PM CDT...

AT 302 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 5 MILES SOUTHWEST OF COMPETITION...OR 18 MILES
SOUTHEAST OF LEBANON...MOVING EAST AT 10 MPH. PENNY SIZE HAIL...AND
WINDS AROUND 50 MPH ARE EXPECTED WITH THIS STORM.

THIS STORM WILL GENERALLY REMAIN OVER RURAL AREAS OF SOUTHEASTERN
LACLEDE AND NORTHERN WRIGHT COUNTIES.

THUNDERSTORMS POSE A VARIETY OF HAZARDS TO THOSE OUTDOORS...INCLUDING
HAIL... STRONG WINDS THAT CAN CREATE DANGEROUS FLYING PROJECTILES AND
DEBRIS...AS WELL AS DEADLY CLOUD TO GROUND LIGHTNING. IF YOU ARE IN
THE PATH OF THIS STORM...MOVE INDOORS TO A STURDY SHELTER
IMMEDIATELY.

LAT...LON 3736 9267 3751 9264 3751 9230 3742 9225
      3740 9225 3724 9234
TIME...MOT...LOC 2003Z 275DEG 7KT 3745 9252

HATCH