

302 

WWUS20 KWNS 052046

SEL6

SPC WW 052046

ILZ000-MOZ000-060400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 496

NWS STORM PREDICTION CENTER NORMAN OK

345 PM CDT FRI SEP 5 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL ILLINOIS

  CENTRAL AND EASTERN MISSOURI



* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 345 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHEAST OF

BLOOMINGTON ILLINOIS TO 35 MILES SOUTHWEST OF VICHY MISSOURI.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 495...



DISCUSSION...WDLY SCTD TSTMS NOW FORMING ALONG AND JUST AHEAD OF

SW-NE COLD FRONT OVER CNTRL MO EXPECTED TO INCREASE IN

COVERAGE/STRENGTH WITH CONTINUED SFC HEATING THIS AFTN...AND WITH

THE ASCENT ON SRN FRINGE OF NEB/IA UPR IMPULSE LATER THIS EVE. WHILE

DEEP WIND PROFILES ARE ONLY MARGINALLY SUPPORTIVE OF

SUSTAINED/ORGANIZED STORMS...VERY WARM/MOIST PRE-FRONTAL ENVIRONMENT

AND STEEPENING LOW-LVL LAPSE RATES SUGGEST A RISK FOR LOCALLY DMGG

WIND AND PERHAPS MARGINALLY SVR HAIL AS THE STORMS MERGE INTO SHORT

LINES/CLUSTERS THROUGH EARLY TNGT.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 26025.





...CORFIDI



116 

WWUS20 KWNS 052046

SEL6

SPC WW 052046

ILZ000-MOZ000-060400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 496

NWS STORM PREDICTION CENTER NORMAN OK

345 PM CDT FRI SEP 5 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL ILLINOIS

  CENTRAL AND EASTERN MISSOURI



* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 345 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHEAST OF

BLOOMINGTON ILLINOIS TO 35 MILES SOUTHWEST OF VICHY MISSOURI.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 495...



DISCUSSION...WDLY SCTD TSTMS NOW FORMING ALONG AND JUST AHEAD OF

SW-NE COLD FRONT OVER CNTRL MO EXPECTED TO INCREASE IN

COVERAGE/STRENGTH WITH CONTINUED SFC HEATING THIS AFTN...AND WITH

THE ASCENT ON SRN FRINGE OF NEB/IA UPR IMPULSE LATER THIS EVE. WHILE

DEEP WIND PROFILES ARE ONLY MARGINALLY SUPPORTIVE OF

SUSTAINED/ORGANIZED STORMS...VERY WARM/MOIST PRE-FRONTAL ENVIRONMENT

AND STEEPENING LOW-LVL LAPSE RATES SUGGEST A RISK FOR LOCALLY DMGG

WIND AND PERHAPS MARGINALLY SVR HAIL AS THE STORMS MERGE INTO SHORT

LINES/CLUSTERS THROUGH EARLY TNGT.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 26025.





...CORFIDI

