Friday, March 4, 2011

NOAA's National Weather Service SPC Tornado/Severe Thunderstorm Watches Update

SPC Tornado Watch 37
Fri, 04 Mar 2011 18:00:02 -0600


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  URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 37 NWS STORM PREDICTION CENTER NORMAN OK 455 PM CST FRI MAR 4 2011  THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF          WEST CENTRAL ILLINOIS        EAST CENTRAL MISSOURI  EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 455 PM UNTIL 1000 PM CST.  TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.  THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH NORTHEAST OF ALTON ILLINOIS TO 45 MILES WEST SOUTHWEST OF FARMINGTON MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).  REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND 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.  OTHER WATCH INFORMATION...CONTINUE...WW 36...  DISCUSSION...ERN MO QLCS WITH EMBEDDED SUPERCELLS EXPECTED TO CONTINUE MAINLY ENE...WITH SOME SWD DEVELOPMENT POSSIBLE LATER THIS EVE.  COOL MID LVL TEMPS AND MOISTURE AXIS EXTENDING N UP THE MID MS VLY ARE  COMPENSATING FOR RELATIVELY MODEST SFC TEMPS TO YIELD SUFFICIENT INSTABILITY FOR SUSTAINED SFC-BASED STORMS.  AS LOW LVL WIND FIELD STRENGTHENS THROUGH THE EVE...AND CNTRL MO UPR IMPULSE CONTINUES ENEWD...POTENTIAL MAY CONTINUE FOR LOW-LVL MESOS WITH A THREAT FOR ISOLD TORNADOES...IN ADDITION TO SMALL BOWS WITH DMGG WIND.  AVIATION...TORNADOES AND 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 450. MEAN STORM MOTION VECTOR 24035.   ...CORFIDI  
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SPC Severe Thunderstorm Watch 36
Fri, 04 Mar 2011 18:00:06 -0600


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  URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 36 NWS STORM PREDICTION CENTER NORMAN OK 135 PM CST FRI MAR 4 2011  THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF          MUCH OF SOUTHWEST AND CENTRAL MISSOURI  EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 135 PM UNTIL 700 PM CST.  HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.  THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTHWEST OF SAINT LOUIS MISSOURI TO 40 MILES SOUTHEAST OF MONETT MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).  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.  DISCUSSION...THUNDERSTORMS EXPECTED TO INCREASE IN NUMBER AND INTENSITY ALONG AND AHEAD OF COLD FRONT CURRENTLY MOVING EWD FROM WRN MO.  AIR MASS HAS DESTABILIZED CENTRAL MO WITH HEATING PROVIDING MUCAPES UPWARDS TO 1000 J/KG WITH LITTLE REMAINING CINH.  WITH APPROACH OF S/WV TROUGH AND ASSOCIATED ASCENT FROM KS...A FEW STORMS WILL BECOME SEVERE WITH LARGE HAIL THE PRIMARY THREAT WITH STEEP LAPSE RATES AND 40-50 DEEP LAYER SHEAR.  AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR 24030.   ...HALES  
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SPC Tornado Watch 37 Status Reports
Fri, 04 Mar 2011 18:00:05 -0600


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  STATUS REPORT ON WW 37  THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.  ..DIAL..03/04/11  ATTN...WFO...LSX...ILX...   STATUS REPORT FOR WT 37   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   ILC005-013-021-025-027-049-051-061-083-117-119-121-133-135-137- 149-157-163-167-171-173-189-050040-  IL  .    ILLINOIS COUNTIES INCLUDED ARE  BOND                 CALHOUN             CHRISTIAN            CLAY                 CLINTON             EFFINGHAM            FAYETTE              GREENE              JERSEY               MACOUPIN             MADISON             MARION               MONROE               MONTGOMERY          MORGAN               PIKE                 RANDOLPH            ST. CLAIR            SANGAMON             SCOTT               SHELBY               WASHINGTON              MOC055-071-093-099-113-123-163-179-183-186-187-189-219-221-510- 050040-  MO  .    MISSOURI COUNTIES INCLUDED ARE  CRAWFORD             FRANKLIN            IRON                 JEFFERSON            LINCOLN             MADISON              PIKE                 REYNOLDS            ST. CHARLES          STE. GENEVIEVE       ST. FRANCOIS        ST. LOUIS            
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SPC Severe Thunderstorm Watch 36 Status Reports
Fri, 04 Mar 2011 18:00:08 -0600


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  STATUS REPORT ON WW 36  SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SSE SZL TO 30 E COU TO 45 SSW UIN.  ..DIAL..03/04/11  ATTN...WFO...LSX...SGF...   STATUS REPORT FOR WS 36   SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS   MOC009-029-043-051-057-059-065-067-073-077-085-091-097-105-109- 119-125-131-139-145-151-153-161-167-169-203-209-213-215-225-229- 050040-  MO  .    MISSOURI COUNTIES INCLUDED ARE  BARRY                CAMDEN              CHRISTIAN            COLE                 DADE                DALLAS               DENT                 DOUGLAS             GASCONADE            GREENE               HICKORY             HOWELL               JASPER               LACLEDE             LAWRENCE             MCDONALD             MARIES              MILLER               MONTGOMERY           NEWTON              OSAGE                OZARK                PHELPS              POLK                 PULASKI              SHANNON             STONE                TANEY                TEXAS               WEBSTER              WRIGHT                  THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.  
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