

920 

WWUS20 KWNS 012258

SEL7

SPC WW 012258

ILZ000-KSZ000-MOZ000-020700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 487

NWS STORM PREDICTION CENTER NORMAN OK

555 PM CDT MON SEP 1 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHWESTERN ILLINOIS

  EXTREME EASTERN KANSAS

  MISSOURI



* EFFECTIVE THIS MONDAY AFTERNOON AND TUESDAY MORNING FROM 555 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5

    INCHES IN DIAMETER POSSIBLE

  ISOLATED SIGNIFICANT DAMAGING WIND GUSTS TO 75 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTHWEST

OF JOPLIN MISSOURI TO 15 MILES SOUTH SOUTHEAST OF SAINT LOUIS

MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 486...



DISCUSSION...TSTM COVERAGE AND SVR POTENTIAL ARE FCST TO CONTINUE

GRADUAL INCREASE ACROSS REGION DURING NEXT SEVERAL HOURS AMIDST

FAVORABLE MOISTURE...STRENGTHENING LARGE-SCALE ASCENT..AT LEAST

MRGLLY SUITABLE SHEAR...AND SUPPORTIVE LOW-LEVEL LIFT.  LARGE HAIL

SHOULD BE PRIMARY HAZARD...THOUGH SOME CONVECTION MAY BECOME

SFC-BASED WITH DAMAGING GUSTS ALSO POSSIBLE.  REF SPC MESOSCALE

DISCUSSION 1659 FOR MORE THOROUGH DETAILS ON INITIAL METEOROLOGICAL

REASONING.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25030.





...EDWARDS



524 

WWUS20 KWNS 012258

SEL7

SPC WW 012258

ILZ000-KSZ000-MOZ000-020700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 487

NWS STORM PREDICTION CENTER NORMAN OK

555 PM CDT MON SEP 1 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHWESTERN ILLINOIS

  EXTREME EASTERN KANSAS

  MISSOURI



* EFFECTIVE THIS MONDAY AFTERNOON AND TUESDAY MORNING FROM 555 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5

    INCHES IN DIAMETER POSSIBLE

  ISOLATED SIGNIFICANT DAMAGING WIND GUSTS TO 75 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTHWEST

OF JOPLIN MISSOURI TO 15 MILES SOUTH SOUTHEAST OF SAINT LOUIS

MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 486...



DISCUSSION...TSTM COVERAGE AND SVR POTENTIAL ARE FCST TO CONTINUE

GRADUAL INCREASE ACROSS REGION DURING NEXT SEVERAL HOURS AMIDST

FAVORABLE MOISTURE...STRENGTHENING LARGE-SCALE ASCENT..AT LEAST

MRGLLY SUITABLE SHEAR...AND SUPPORTIVE LOW-LEVEL LIFT.  LARGE HAIL

SHOULD BE PRIMARY HAZARD...THOUGH SOME CONVECTION MAY BECOME

SFC-BASED WITH DAMAGING GUSTS ALSO POSSIBLE.  REF SPC MESOSCALE

DISCUSSION 1659 FOR MORE THOROUGH DETAILS ON INITIAL METEOROLOGICAL

REASONING.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25030.





...EDWARDS

